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Bahmanian, J. Brockmeier, and J. C. Scheytt, “An Ultra Low Phase Noise Frequency Synthesizer with Optical Output for 77 GHz Photonic Radar,” presented at the German Microwave Conference, Dresden, 2025.","chicago":"Kruse, Stephan, Vijayalakshmi Surendranath Shroff, Meysam Bahmanian, Jan Brockmeier, and J. Christoph Scheytt. “An Ultra Low Phase Noise Frequency Synthesizer with Optical Output for 77 GHz Photonic Radar,” 2025.","ama":"Kruse S, Surendranath Shroff V, Bahmanian M, Brockmeier J, Scheytt JC. An Ultra Low Phase Noise Frequency Synthesizer with Optical Output for 77 GHz Photonic Radar. In: ; 2025."},"year":"2025","conference":{"name":"German Microwave Conference","start_date":"2025-03-17","end_date":"2025-03-19","location":"Dresden"},"title":"An Ultra Low Phase Noise Frequency Synthesizer with Optical Output for 77 GHz Photonic Radar","date_created":"2025-01-17T06:26:14Z","author":[{"first_name":"Stephan","last_name":"Kruse","full_name":"Kruse, Stephan","id":"38254"},{"first_name":"Vijayalakshmi","last_name":"Surendranath Shroff","full_name":"Surendranath Shroff, Vijayalakshmi","id":"76626"},{"first_name":"Meysam","id":"69233","full_name":"Bahmanian, Meysam","last_name":"Bahmanian"},{"full_name":"Brockmeier, Jan","id":"67349","last_name":"Brockmeier","first_name":"Jan"},{"full_name":"Scheytt, J. Christoph","id":"37144","orcid":"0000-0002-5950-6618 ","last_name":"Scheytt","first_name":"J. Christoph"}],"date_updated":"2025-03-24T06:40:59Z"},{"user_id":"76626","_id":"62682","language":[{"iso":"eng"}],"publication":"2025 IEEE/MTT-S International Microwave Symposium - IMS 2025","type":"conference","status":"public","author":[{"first_name":"Vijayalakshmi","full_name":"Surendranath Shroff, Vijayalakshmi","id":"76626","last_name":"Surendranath Shroff"},{"last_name":"Bahmanian","full_name":"Bahmanian, Meysam","id":"69233","first_name":"Meysam"},{"orcid":"0000-0002-5950-6618 ","last_name":"Scheytt","id":"37144","full_name":"Scheytt, J. Christoph","first_name":"J. Christoph"}],"date_created":"2025-11-28T05:58:53Z","publisher":"IEEE","date_updated":"2025-12-11T08:08:10Z","doi":"10.1109/ims40360.2025.11104035","title":"Ultra-Low Phase Noise Frequency Synthesis Using Electro-Optic Detector-Based Comb-Microwave Synchronization","citation":{"chicago":"Surendranath Shroff, Vijayalakshmi, Meysam Bahmanian, and J. Christoph Scheytt. “Ultra-Low Phase Noise Frequency Synthesis Using Electro-Optic Detector-Based Comb-Microwave Synchronization.” In <i>2025 IEEE/MTT-S International Microwave Symposium - IMS 2025</i>. IEEE, 2025. <a href=\"https://doi.org/10.1109/ims40360.2025.11104035\">https://doi.org/10.1109/ims40360.2025.11104035</a>.","ieee":"V. Surendranath Shroff, M. Bahmanian, and J. C. Scheytt, “Ultra-Low Phase Noise Frequency Synthesis Using Electro-Optic Detector-Based Comb-Microwave Synchronization,” 2025, doi: <a href=\"https://doi.org/10.1109/ims40360.2025.11104035\">10.1109/ims40360.2025.11104035</a>.","ama":"Surendranath Shroff V, Bahmanian M, Scheytt JC. Ultra-Low Phase Noise Frequency Synthesis Using Electro-Optic Detector-Based Comb-Microwave Synchronization. In: <i>2025 IEEE/MTT-S International Microwave Symposium - IMS 2025</i>. IEEE; 2025. doi:<a href=\"https://doi.org/10.1109/ims40360.2025.11104035\">10.1109/ims40360.2025.11104035</a>","apa":"Surendranath Shroff, V., Bahmanian, M., &#38; Scheytt, J. C. (2025). Ultra-Low Phase Noise Frequency Synthesis Using Electro-Optic Detector-Based Comb-Microwave Synchronization. <i>2025 IEEE/MTT-S International Microwave Symposium - IMS 2025</i>. <a href=\"https://doi.org/10.1109/ims40360.2025.11104035\">https://doi.org/10.1109/ims40360.2025.11104035</a>","short":"V. Surendranath Shroff, M. Bahmanian, J.C. Scheytt, in: 2025 IEEE/MTT-S International Microwave Symposium - IMS 2025, IEEE, 2025.","bibtex":"@inproceedings{Surendranath Shroff_Bahmanian_Scheytt_2025, title={Ultra-Low Phase Noise Frequency Synthesis Using Electro-Optic Detector-Based Comb-Microwave Synchronization}, DOI={<a href=\"https://doi.org/10.1109/ims40360.2025.11104035\">10.1109/ims40360.2025.11104035</a>}, booktitle={2025 IEEE/MTT-S International Microwave Symposium - IMS 2025}, publisher={IEEE}, author={Surendranath Shroff, Vijayalakshmi and Bahmanian, Meysam and Scheytt, J. Christoph}, year={2025} }","mla":"Surendranath Shroff, Vijayalakshmi, et al. “Ultra-Low Phase Noise Frequency Synthesis Using Electro-Optic Detector-Based Comb-Microwave Synchronization.” <i>2025 IEEE/MTT-S International Microwave Symposium - IMS 2025</i>, IEEE, 2025, doi:<a href=\"https://doi.org/10.1109/ims40360.2025.11104035\">10.1109/ims40360.2025.11104035</a>."},"year":"2025"},{"language":[{"iso":"eng"}],"_id":"62683","user_id":"76626","status":"public","publication":"IEEE Transactions on Microwave Theory and Techniques","type":"journal_article","title":"Noise Folding in Optoelectronic PLLs for Ultralow Phase Noise: Modeling and Suppression With Experimental Validation","doi":"10.1109/TMTT.2025.3615413","publisher":"IEEE","date_updated":"2025-12-11T08:08:04Z","author":[{"full_name":"Surendranath Shroff, Vijayalakshmi","id":"76626","last_name":"Surendranath Shroff","first_name":"Vijayalakshmi"},{"last_name":"Bahmanian","id":"69233","full_name":"Bahmanian, Meysam","first_name":"Meysam"},{"id":"37144","full_name":"Scheytt, J. Christoph","last_name":"Scheytt","orcid":"0000-0002-5950-6618 ","first_name":"J. Christoph"}],"date_created":"2025-11-28T06:00:13Z","year":"2025","citation":{"bibtex":"@article{Surendranath Shroff_Bahmanian_Scheytt_2025, title={Noise Folding in Optoelectronic PLLs for Ultralow Phase Noise: Modeling and Suppression With Experimental Validation}, DOI={<a href=\"https://doi.org/10.1109/TMTT.2025.3615413\">10.1109/TMTT.2025.3615413</a>}, journal={IEEE Transactions on Microwave Theory and Techniques}, publisher={IEEE}, author={Surendranath Shroff, Vijayalakshmi and Bahmanian, Meysam and Scheytt, J. Christoph}, year={2025} }","mla":"Surendranath Shroff, Vijayalakshmi, et al. “Noise Folding in Optoelectronic PLLs for Ultralow Phase Noise: Modeling and Suppression With Experimental Validation.” <i>IEEE Transactions on Microwave Theory and Techniques</i>, IEEE, 2025, doi:<a href=\"https://doi.org/10.1109/TMTT.2025.3615413\">10.1109/TMTT.2025.3615413</a>.","short":"V. Surendranath Shroff, M. Bahmanian, J.C. Scheytt, IEEE Transactions on Microwave Theory and Techniques (2025).","apa":"Surendranath Shroff, V., Bahmanian, M., &#38; Scheytt, J. C. (2025). Noise Folding in Optoelectronic PLLs for Ultralow Phase Noise: Modeling and Suppression With Experimental Validation. <i>IEEE Transactions on Microwave Theory and Techniques</i>. <a href=\"https://doi.org/10.1109/TMTT.2025.3615413\">https://doi.org/10.1109/TMTT.2025.3615413</a>","ama":"Surendranath Shroff V, Bahmanian M, Scheytt JC. Noise Folding in Optoelectronic PLLs for Ultralow Phase Noise: Modeling and Suppression With Experimental Validation. <i>IEEE Transactions on Microwave Theory and Techniques</i>. Published online 2025. doi:<a href=\"https://doi.org/10.1109/TMTT.2025.3615413\">10.1109/TMTT.2025.3615413</a>","chicago":"Surendranath Shroff, Vijayalakshmi, Meysam Bahmanian, and J. Christoph Scheytt. “Noise Folding in Optoelectronic PLLs for Ultralow Phase Noise: Modeling and Suppression With Experimental Validation.” <i>IEEE Transactions on Microwave Theory and Techniques</i>, 2025. <a href=\"https://doi.org/10.1109/TMTT.2025.3615413\">https://doi.org/10.1109/TMTT.2025.3615413</a>.","ieee":"V. Surendranath Shroff, M. Bahmanian, and J. C. Scheytt, “Noise Folding in Optoelectronic PLLs for Ultralow Phase Noise: Modeling and Suppression With Experimental Validation,” <i>IEEE Transactions on Microwave Theory and Techniques</i>, 2025, doi: <a href=\"https://doi.org/10.1109/TMTT.2025.3615413\">10.1109/TMTT.2025.3615413</a>."}},{"conference":{"location":"Fort Lauderdale, Florida","name":"2024 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium (BCICTS) "},"doi":"10.1109/BCICTS59662.2024.10745663","title":"Design of an Ultra-Low Phase Noise Broadband Amplifier in 130 nm SiGe BiCMOS Technology","date_created":"2024-11-15T09:57:42Z","author":[{"full_name":"Surendranath Shroff, Vijayalakshmi","id":"76626","last_name":"Surendranath Shroff","first_name":"Vijayalakshmi"},{"last_name":"Bahmanian","full_name":"Bahmanian, Meysam","id":"69233","first_name":"Meysam"},{"last_name":"Kruse","id":"38254","full_name":"Kruse, Stephan","first_name":"Stephan"},{"first_name":"J. Christoph","full_name":"Scheytt, J. Christoph","id":"37144","orcid":"0000-0002-5950-6618 ","last_name":"Scheytt"}],"date_updated":"2025-11-28T05:39:07Z","publisher":"IEEE","citation":{"apa":"Surendranath Shroff, V., Bahmanian, M., Kruse, S., &#38; Scheytt, J. C. (2024). Design of an Ultra-Low Phase Noise Broadband Amplifier in 130 nm SiGe BiCMOS Technology. <i>2024 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium (BCICTS) </i>. 2024 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium (BCICTS) , Fort Lauderdale, Florida. <a href=\"https://doi.org/10.1109/BCICTS59662.2024.10745663\">https://doi.org/10.1109/BCICTS59662.2024.10745663</a>","mla":"Surendranath Shroff, Vijayalakshmi, et al. “Design of an Ultra-Low Phase Noise Broadband Amplifier in 130 Nm SiGe BiCMOS Technology.” <i>2024 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium (BCICTS) </i>, IEEE, 2024, doi:<a href=\"https://doi.org/10.1109/BCICTS59662.2024.10745663\">10.1109/BCICTS59662.2024.10745663</a>.","short":"V. Surendranath Shroff, M. Bahmanian, S. Kruse, J.C. Scheytt, in: 2024 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium (BCICTS) , IEEE, 2024.","bibtex":"@inproceedings{Surendranath Shroff_Bahmanian_Kruse_Scheytt_2024, title={Design of an Ultra-Low Phase Noise Broadband Amplifier in 130 nm SiGe BiCMOS Technology}, DOI={<a href=\"https://doi.org/10.1109/BCICTS59662.2024.10745663\">10.1109/BCICTS59662.2024.10745663</a>}, booktitle={2024 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium (BCICTS) }, publisher={IEEE}, author={Surendranath Shroff, Vijayalakshmi and Bahmanian, Meysam and Kruse, Stephan and Scheytt, J. Christoph}, year={2024} }","chicago":"Surendranath Shroff, Vijayalakshmi, Meysam Bahmanian, Stephan Kruse, and J. Christoph Scheytt. “Design of an Ultra-Low Phase Noise Broadband Amplifier in 130 Nm SiGe BiCMOS Technology.” In <i>2024 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium (BCICTS) </i>. IEEE, 2024. <a href=\"https://doi.org/10.1109/BCICTS59662.2024.10745663\">https://doi.org/10.1109/BCICTS59662.2024.10745663</a>.","ieee":"V. Surendranath Shroff, M. Bahmanian, S. Kruse, and J. C. Scheytt, “Design of an Ultra-Low Phase Noise Broadband Amplifier in 130 nm SiGe BiCMOS Technology,” presented at the 2024 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium (BCICTS) , Fort Lauderdale, Florida, 2024, doi: <a href=\"https://doi.org/10.1109/BCICTS59662.2024.10745663\">10.1109/BCICTS59662.2024.10745663</a>.","ama":"Surendranath Shroff V, Bahmanian M, Kruse S, Scheytt JC. Design of an Ultra-Low Phase Noise Broadband Amplifier in 130 nm SiGe BiCMOS Technology. In: <i>2024 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium (BCICTS) </i>. IEEE; 2024. doi:<a href=\"https://doi.org/10.1109/BCICTS59662.2024.10745663\">10.1109/BCICTS59662.2024.10745663</a>"},"year":"2024","language":[{"iso":"eng"}],"ddc":["620"],"user_id":"76626","department":[{"_id":"58"}],"_id":"57103","status":"public","type":"conference","publication":"2024 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium (BCICTS) "},{"ipn":"DE102021214164A1","title":"Einstellbare Signalquelle mit kleinem Phasenrauschen","date_created":"2023-11-06T10:23:04Z","author":[{"id":"69233","full_name":"Bahmanian, Meysam","last_name":"Bahmanian","first_name":"Meysam"},{"first_name":"J. Christoph","orcid":"0000-0002-5950-6618 ","last_name":"Scheytt","id":"37144","full_name":"Scheytt, J. Christoph"}],"date_updated":"2024-11-15T13:58:28Z","ipc":"H03B 17/00 (2006.01)","citation":{"ama":"Bahmanian M, Scheytt JC. Einstellbare Signalquelle mit kleinem Phasenrauschen. Published online 2023.","ieee":"M. Bahmanian and J. C. Scheytt, “Einstellbare Signalquelle mit kleinem Phasenrauschen.” 2023.","chicago":"Bahmanian, Meysam, and J. Christoph Scheytt. “Einstellbare Signalquelle Mit Kleinem Phasenrauschen,” 2023.","bibtex":"@article{Bahmanian_Scheytt_2023, title={Einstellbare Signalquelle mit kleinem Phasenrauschen}, author={Bahmanian, Meysam and Scheytt, J. Christoph}, year={2023} }","short":"M. Bahmanian, J.C. Scheytt, (2023).","mla":"Bahmanian, Meysam, and J. Christoph Scheytt. <i>Einstellbare Signalquelle Mit Kleinem Phasenrauschen</i>. 2023.","apa":"Bahmanian, M., &#38; Scheytt, J. C. (2023). <i>Einstellbare Signalquelle mit kleinem Phasenrauschen</i>."},"year":"2023","user_id":"38254","department":[{"_id":"58"}],"publication_date":"15.06.2023","_id":"48623","status":"public","abstract":[{"lang":"ger","text":"Die Erfindung betrifft eine einstellbare Signalquelle mit kleinem Phasenrauschen, aufweisend\r\n• einen optischen Mikrowellenphasendetektor (BOMPD) aufweisend\r\n• einen Intensitätsmodulator (BIM), mit einem optischen Signaleingang, einem Modulationseingang (I), und einem ersten Ausgang (O1) und einen zweiten Ausgang (O2),\r\n• eine erste Photodiode (PD1), die im Betrieb mit Licht des ersten Ausgangs (O1) bestrahlt werden kann,\r\n• eine zweite Photodiode (PD2), die im Betrieb mit Licht des zweiten Ausgangs (O2) bestahlt werden kann,\r\n• wobei die erste Photodiode (PD1) und die zweite Photodiode (PD2), im Betrieb vorgespannt in Reihe geschaltet sind,\r\n• wobei zwischen der ersten Photodiode (PD1) und der zweiten Photodiode (PD2) ein Abgriff für eine Abgriffs-Signal angeordnet ist,\r\n• weiterhin aufweisend eine steuerbare Gleichstromquelle,\r\n• wobei am Abgriff im Betrieb mittels der ersten Gleichstromquelle (N4) ein Offsetstrom einstellbar ist, womit die Symmetrie des optischen Mikrowellenphasendetektor im Betrieb durch einen Offsetstrom aufgehoben wird,\r\n• wobei der Abgriff mit einem eventuellen Offsetstrom an ein Tiefpassfilter geführt wird,\r\n• wobei das tiefpassgefilterte Abgriffs-Signal einem einstellbaren Oszillator (OSZ) zur Verfügung gestellt wird.\r\n"}],"type":"patent"},{"department":[{"_id":"58"},{"_id":"230"}],"user_id":"76626","_id":"47521","language":[{"iso":"eng"}],"publication":"2023 PhotonIcs & Electromagnetics Research Symposium (PIERS), ","type":"conference","status":"public","abstract":[{"lang":"eng","text":"This paper experimentally investigates and interprets the e®ects of noise and non-\r\nlinearity in a silicon photonic optical test structure. For the analysis di®erent optoelectronic phase\r\nnoise measurement techniques are used. Our tests focuses on the performance of integrated opti-\r\ncal test structures using femtosecond pulses in the 1550nm spectral range. A primary objective\r\nis to understand the behaviour of silicon photonic waveguides that can be further employed in the\r\nimplementation of an optoelectronic phase-locked loop (OEPLL) in silicon photonics technology.\r\nA comparison of our results, as well as a discussion on the di®erent optoelectronic phase noise\r\nmeasurement techniques are presented. Our ¯ndings provide insights that can be leveraged to\r\noptimize the design and performance of ultra-low phase noise on-chip OEPLL systems locking\r\nto mode-locked laser (MLL) signals. In the future such systems can be essential for advanced\r\ncommunication and sensing applications."}],"date_created":"2023-09-27T11:08:23Z","author":[{"id":"76626","full_name":"Surendranath Shroff, Vijayalakshmi","last_name":"Surendranath Shroff","first_name":"Vijayalakshmi"},{"first_name":"Christian","full_name":"Kress, Christian","id":"13256","last_name":"Kress"},{"last_name":"Bahmanian","full_name":"Bahmanian, Meysam","id":"69233","first_name":"Meysam"},{"first_name":"J. Christoph","id":"37144","full_name":"Scheytt, J. Christoph","orcid":"0000-0002-5950-6618 ","last_name":"Scheytt"}],"publisher":"IEEE","date_updated":"2025-02-11T10:58:57Z","doi":"10.1109/PIERS59004.2023.10221473","conference":{"location":"Prague, Czech Republic","end_date":"2023-07-06","start_date":"2023-07-03","name":"2023 PhotonIcs & Electromagnetics Research Symposium (PIERS)"},"title":"Analysis of Phase Noise in Waveguide-integrated Optical Test Structures in Silicon Photonics","publication_identifier":{"eisbn":["979-8-3503-1284-3"]},"publication_status":"published","citation":{"ama":"Surendranath Shroff V, Kress C, Bahmanian M, Scheytt JC. Analysis of Phase Noise in Waveguide-integrated Optical Test Structures in Silicon Photonics. In: <i>2023 PhotonIcs &#38; Electromagnetics Research Symposium (PIERS), </i>. IEEE; 2023. doi:<a href=\"https://doi.org/10.1109/PIERS59004.2023.10221473\">10.1109/PIERS59004.2023.10221473</a>","chicago":"Surendranath Shroff, Vijayalakshmi, Christian Kress, Meysam Bahmanian, and J. Christoph Scheytt. “Analysis of Phase Noise in Waveguide-Integrated Optical Test Structures in Silicon Photonics.” In <i>2023 PhotonIcs &#38; Electromagnetics Research Symposium (PIERS), </i>. IEEE, 2023. <a href=\"https://doi.org/10.1109/PIERS59004.2023.10221473\">https://doi.org/10.1109/PIERS59004.2023.10221473</a>.","ieee":"V. Surendranath Shroff, C. Kress, M. Bahmanian, and J. C. Scheytt, “Analysis of Phase Noise in Waveguide-integrated Optical Test Structures in Silicon Photonics,” presented at the 2023 PhotonIcs &#38; Electromagnetics Research Symposium (PIERS), Prague, Czech Republic, 2023, doi: <a href=\"https://doi.org/10.1109/PIERS59004.2023.10221473\">10.1109/PIERS59004.2023.10221473</a>.","apa":"Surendranath Shroff, V., Kress, C., Bahmanian, M., &#38; Scheytt, J. C. (2023). Analysis of Phase Noise in Waveguide-integrated Optical Test Structures in Silicon Photonics. <i>2023 PhotonIcs &#38; Electromagnetics Research Symposium (PIERS), </i>. 2023 PhotonIcs &#38; Electromagnetics Research Symposium (PIERS), Prague, Czech Republic. <a href=\"https://doi.org/10.1109/PIERS59004.2023.10221473\">https://doi.org/10.1109/PIERS59004.2023.10221473</a>","short":"V. Surendranath Shroff, C. Kress, M. Bahmanian, J.C. Scheytt, in: 2023 PhotonIcs &#38; Electromagnetics Research Symposium (PIERS), , IEEE, 2023.","mla":"Surendranath Shroff, Vijayalakshmi, et al. “Analysis of Phase Noise in Waveguide-Integrated Optical Test Structures in Silicon Photonics.” <i>2023 PhotonIcs &#38; Electromagnetics Research Symposium (PIERS), </i>, IEEE, 2023, doi:<a href=\"https://doi.org/10.1109/PIERS59004.2023.10221473\">10.1109/PIERS59004.2023.10221473</a>.","bibtex":"@inproceedings{Surendranath Shroff_Kress_Bahmanian_Scheytt_2023, title={Analysis of Phase Noise in Waveguide-integrated Optical Test Structures in Silicon Photonics}, DOI={<a href=\"https://doi.org/10.1109/PIERS59004.2023.10221473\">10.1109/PIERS59004.2023.10221473</a>}, booktitle={2023 PhotonIcs &#38; Electromagnetics Research Symposium (PIERS), }, publisher={IEEE}, author={Surendranath Shroff, Vijayalakshmi and Kress, Christian and Bahmanian, Meysam and Scheytt, J. Christoph}, year={2023} }"},"year":"2023"},{"language":[{"iso":"eng"}],"_id":"31805","user_id":"38254","department":[{"_id":"58"}],"status":"public","type":"conference","publication":"European Radar Conference (EuRAD)","title":"A Low Phase Noise 77 GHz Frequency Synthesizer for Long Range Radar","doi":"10.23919/EuRAD54643.2022.9924677","conference":{"end_date":"2022.09.30","start_date":"2022.09.28"},"date_updated":"2025-02-25T05:52:35Z","date_created":"2022-06-08T08:35:46Z","author":[{"first_name":"Stephan","id":"38254","full_name":"Kruse, Stephan","last_name":"Kruse"},{"last_name":"Bahmanian","full_name":"Bahmanian, Meysam","id":"69233","first_name":"Meysam"},{"first_name":"Saeed","id":"88494","full_name":"Fard, Saeed","last_name":"Fard"},{"first_name":"Marc-Michael","full_name":"Meinecke, Marc-Michael","last_name":"Meinecke"},{"last_name":"Kurz","full_name":"Kurz, Heiko G.","first_name":"Heiko G."},{"orcid":"https://orcid.org/0000-0002-5950-6618","last_name":"Scheytt","id":"37144","full_name":"Scheytt, Christoph","first_name":"Christoph"}],"place":"Milan, Italy","year":"2022","citation":{"ama":"Kruse S, Bahmanian M, Fard S, Meinecke M-M, Kurz HG, Scheytt C. A Low Phase Noise 77 GHz Frequency Synthesizer for Long Range Radar. In: <i>European Radar Conference (EuRAD)</i>. ; 2022. doi:<a href=\"https://doi.org/10.23919/EuRAD54643.2022.9924677\">10.23919/EuRAD54643.2022.9924677</a>","chicago":"Kruse, Stephan, Meysam Bahmanian, Saeed Fard, Marc-Michael Meinecke, Heiko G. Kurz, and Christoph Scheytt. “A Low Phase Noise 77 GHz Frequency Synthesizer for Long Range Radar.” In <i>European Radar Conference (EuRAD)</i>. Milan, Italy, 2022. <a href=\"https://doi.org/10.23919/EuRAD54643.2022.9924677\">https://doi.org/10.23919/EuRAD54643.2022.9924677</a>.","ieee":"S. Kruse, M. Bahmanian, S. Fard, M.-M. Meinecke, H. G. Kurz, and C. Scheytt, “A Low Phase Noise 77 GHz Frequency Synthesizer for Long Range Radar,” 2022, doi: <a href=\"https://doi.org/10.23919/EuRAD54643.2022.9924677\">10.23919/EuRAD54643.2022.9924677</a>.","apa":"Kruse, S., Bahmanian, M., Fard, S., Meinecke, M.-M., Kurz, H. G., &#38; Scheytt, C. (2022). A Low Phase Noise 77 GHz Frequency Synthesizer for Long Range Radar. <i>European Radar Conference (EuRAD)</i>. <a href=\"https://doi.org/10.23919/EuRAD54643.2022.9924677\">https://doi.org/10.23919/EuRAD54643.2022.9924677</a>","short":"S. Kruse, M. Bahmanian, S. Fard, M.-M. Meinecke, H.G. Kurz, C. Scheytt, in: European Radar Conference (EuRAD), Milan, Italy, 2022.","bibtex":"@inproceedings{Kruse_Bahmanian_Fard_Meinecke_Kurz_Scheytt_2022, place={Milan, Italy}, title={A Low Phase Noise 77 GHz Frequency Synthesizer for Long Range Radar}, DOI={<a href=\"https://doi.org/10.23919/EuRAD54643.2022.9924677\">10.23919/EuRAD54643.2022.9924677</a>}, booktitle={European Radar Conference (EuRAD)}, author={Kruse, Stephan and Bahmanian, Meysam and Fard, Saeed and Meinecke, Marc-Michael and Kurz, Heiko G. and Scheytt, Christoph}, year={2022} }","mla":"Kruse, Stephan, et al. “A Low Phase Noise 77 GHz Frequency Synthesizer for Long Range Radar.” <i>European Radar Conference (EuRAD)</i>, 2022, doi:<a href=\"https://doi.org/10.23919/EuRAD54643.2022.9924677\">10.23919/EuRAD54643.2022.9924677</a>."}},{"article_number":"7763","_id":"34232","user_id":"69233","department":[{"_id":"58"}],"status":"public","type":"journal_article","doi":"10.1364/oe.451894","date_updated":"2025-03-10T13:27:46Z","author":[{"first_name":"Meysam","last_name":"Bahmanian","full_name":"Bahmanian, Meysam","id":"69233"},{"id":"13256","full_name":"Kress, Christian","last_name":"Kress","first_name":"Christian"},{"last_name":"Scheytt","orcid":"https://orcid.org/0000-0002-5950-6618","id":"37144","full_name":"Scheytt, J. Christoph","first_name":"J. Christoph"}],"volume":30,"citation":{"apa":"Bahmanian, M., Kress, C., &#38; Scheytt, J. C. (2022). Locking of microwave oscillators on the interharmonics of mode-locked laser signals. <i>Optics Express</i>, <i>30</i>(5), Article 7763. <a href=\"https://doi.org/10.1364/oe.451894\">https://doi.org/10.1364/oe.451894</a>","short":"M. Bahmanian, C. Kress, J.C. Scheytt, Optics Express 30 (2022).","bibtex":"@article{Bahmanian_Kress_Scheytt_2022, title={Locking of microwave oscillators on the interharmonics of mode-locked laser signals}, volume={30}, DOI={<a href=\"https://doi.org/10.1364/oe.451894\">10.1364/oe.451894</a>}, number={57763}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Bahmanian, Meysam and Kress, Christian and Scheytt, J. Christoph}, year={2022} }","mla":"Bahmanian, Meysam, et al. “Locking of Microwave Oscillators on the Interharmonics of Mode-Locked Laser Signals.” <i>Optics Express</i>, vol. 30, no. 5, 7763, Optica Publishing Group, 2022, doi:<a href=\"https://doi.org/10.1364/oe.451894\">10.1364/oe.451894</a>.","ama":"Bahmanian M, Kress C, Scheytt JC. Locking of microwave oscillators on the interharmonics of mode-locked laser signals. <i>Optics Express</i>. 2022;30(5). doi:<a href=\"https://doi.org/10.1364/oe.451894\">10.1364/oe.451894</a>","ieee":"M. Bahmanian, C. Kress, and J. C. Scheytt, “Locking of microwave oscillators on the interharmonics of mode-locked laser signals,” <i>Optics Express</i>, vol. 30, no. 5, Art. no. 7763, 2022, doi: <a href=\"https://doi.org/10.1364/oe.451894\">10.1364/oe.451894</a>.","chicago":"Bahmanian, Meysam, Christian Kress, and J. Christoph Scheytt. “Locking of Microwave Oscillators on the Interharmonics of Mode-Locked Laser Signals.” <i>Optics Express</i> 30, no. 5 (2022). <a href=\"https://doi.org/10.1364/oe.451894\">https://doi.org/10.1364/oe.451894</a>."},"intvolume":"        30","publication_status":"published","publication_identifier":{"issn":["1094-4087"]},"language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"<jats:p>In this paper, the theory of phase-locking of a microwave oscillator on the interharmonics, i.e. non-integer harmonics, of the repetition rate of the optical pulse train of a mode-locked laser (MLL) is developed. A balanced optical microwave phase detector (BOMPD) is implemented using a balanced Mach-Zehnder modulator and is employed to discriminate the phase difference between the envelope of the optical pulses and the microwave oscillator. It is shown mathematically that the inherent nonlinear properties of BOMPD with respect to the microwave excitation amplitude can be used for interharmonic locking. The characteristic functions of the phase detector for interharmonic locking are derived analytically and are compared with the measurement results. An opto-electronic phase-locked loop (OEPLL) is demonstrated whose output frequency locks on interharmonics of the MLL repetition rate when an appropriate modulator bias and sufficient RF amplitude are applied. Thus, for the first time theory and experiment of reliable locking on interharmonics of the repetition rate of a MLL are presented.</jats:p>"}],"publication":"Optics Express","title":"Locking of microwave oscillators on the interharmonics of mode-locked laser signals","publisher":"Optica Publishing Group","date_created":"2022-12-06T10:30:21Z","year":"2022","issue":"5"},{"date_created":"2022-12-06T11:05:28Z","publisher":"Institute of Electrical and Electronics Engineers (IEEE)","title":"Noise Processes and Nonlinear Mechanisms in Optoelectronic Phase-Locked Loop Using a Balanced Optical Microwave Phase Detector","issue":"10","year":"2022","language":[{"iso":"eng"}],"publication":"IEEE Transactions on Microwave Theory and Techniques","author":[{"id":"69233","full_name":"Bahmanian, Meysam","last_name":"Bahmanian","first_name":"Meysam"},{"first_name":"J. Christoph","last_name":"Scheytt","orcid":"https://orcid.org/0000-0002-5950-6618","id":"37144","full_name":"Scheytt, J. Christoph"}],"volume":70,"date_updated":"2025-10-30T09:21:12Z","doi":"10.1109/tmtt.2022.3197621","publication_status":"published","publication_identifier":{"issn":["0018-9480","1557-9670"]},"citation":{"chicago":"Bahmanian, Meysam, and J. Christoph Scheytt. “Noise Processes and Nonlinear Mechanisms in Optoelectronic Phase-Locked Loop Using a Balanced Optical Microwave Phase Detector.” <i>IEEE Transactions on Microwave Theory and Techniques</i> 70, no. 10 (2022): 4422–35. <a href=\"https://doi.org/10.1109/tmtt.2022.3197621\">https://doi.org/10.1109/tmtt.2022.3197621</a>.","ieee":"M. Bahmanian and J. C. Scheytt, “Noise Processes and Nonlinear Mechanisms in Optoelectronic Phase-Locked Loop Using a Balanced Optical Microwave Phase Detector,” <i>IEEE Transactions on Microwave Theory and Techniques</i>, vol. 70, no. 10, pp. 4422–4435, 2022, doi: <a href=\"https://doi.org/10.1109/tmtt.2022.3197621\">10.1109/tmtt.2022.3197621</a>.","ama":"Bahmanian M, Scheytt JC. Noise Processes and Nonlinear Mechanisms in Optoelectronic Phase-Locked Loop Using a Balanced Optical Microwave Phase Detector. <i>IEEE Transactions on Microwave Theory and Techniques</i>. 2022;70(10):4422-4435. doi:<a href=\"https://doi.org/10.1109/tmtt.2022.3197621\">10.1109/tmtt.2022.3197621</a>","bibtex":"@article{Bahmanian_Scheytt_2022, title={Noise Processes and Nonlinear Mechanisms in Optoelectronic Phase-Locked Loop Using a Balanced Optical Microwave Phase Detector}, volume={70}, DOI={<a href=\"https://doi.org/10.1109/tmtt.2022.3197621\">10.1109/tmtt.2022.3197621</a>}, number={10}, journal={IEEE Transactions on Microwave Theory and Techniques}, publisher={Institute of Electrical and Electronics Engineers (IEEE)}, author={Bahmanian, Meysam and Scheytt, J. Christoph}, year={2022}, pages={4422–4435} }","mla":"Bahmanian, Meysam, and J. Christoph Scheytt. “Noise Processes and Nonlinear Mechanisms in Optoelectronic Phase-Locked Loop Using a Balanced Optical Microwave Phase Detector.” <i>IEEE Transactions on Microwave Theory and Techniques</i>, vol. 70, no. 10, Institute of Electrical and Electronics Engineers (IEEE), 2022, pp. 4422–35, doi:<a href=\"https://doi.org/10.1109/tmtt.2022.3197621\">10.1109/tmtt.2022.3197621</a>.","short":"M. Bahmanian, J.C. Scheytt, IEEE Transactions on Microwave Theory and Techniques 70 (2022) 4422–4435.","apa":"Bahmanian, M., &#38; Scheytt, J. C. (2022). Noise Processes and Nonlinear Mechanisms in Optoelectronic Phase-Locked Loop Using a Balanced Optical Microwave Phase Detector. <i>IEEE Transactions on Microwave Theory and Techniques</i>, <i>70</i>(10), 4422–4435. <a href=\"https://doi.org/10.1109/tmtt.2022.3197621\">https://doi.org/10.1109/tmtt.2022.3197621</a>"},"page":"4422-4435","intvolume":"        70","user_id":"44271","department":[{"_id":"58"},{"_id":"230"}],"project":[{"_id":"298","name":"FOR 2863: Metrologie für die THz Kommunikation (Meteracom)"},{"_id":"314","name":"FOR 2863:  Metrologie für die THz Kommunikation, TP B2: Rückführbare Terahertz Transceiver"}],"_id":"34239","type":"journal_article","status":"public"},{"project":[{"_id":"302","name":"PONyDAC: PONyDAC II - Präziser Optischer Nyquist-Puls-Synthesizer DAC","grant_number":"403154102"},{"name":"NyPhE: NyPhE - Nyquist Silicon Photonics Engine","_id":"299","grant_number":"13N14882"}],"_id":"29204","user_id":"13256","department":[{"_id":"58"},{"_id":"230"}],"type":"journal_article","status":"public","date_updated":"2023-06-16T06:56:27Z","author":[{"first_name":"Christian","last_name":"Kress","id":"13256","full_name":"Kress, Christian"},{"full_name":"Bahmanian, Meysam","id":"69233","last_name":"Bahmanian","first_name":"Meysam"},{"first_name":"Tobias","id":"39217","full_name":"Schwabe, Tobias","last_name":"Schwabe"},{"full_name":"Scheytt, J. Christoph","id":"37144","last_name":"Scheytt","orcid":"https://orcid.org/0000-0002-5950-6618","first_name":"J. Christoph"}],"volume":29,"doi":"10.1364/OE.427424","related_material":{"link":[{"relation":"confirmation","url":"https://pubmed.ncbi.nlm.nih.gov/34614628/"}]},"citation":{"ama":"Kress C, Bahmanian M, Schwabe T, Scheytt JC. Analysis of the effects of jitter, relative intensity noise, and nonlinearity on a photonic digital-to-analog converter based on optical Nyquist pulse synthesis. <i>Opt Express</i>. 2021;29(15):23671–23681. doi:<a href=\"https://doi.org/10.1364/OE.427424\">10.1364/OE.427424</a>","ieee":"C. Kress, M. Bahmanian, T. Schwabe, and J. C. Scheytt, “Analysis of the effects of jitter, relative intensity noise, and nonlinearity on a photonic digital-to-analog converter based on optical Nyquist pulse synthesis,” <i>Opt. Express</i>, vol. 29, no. 15, pp. 23671–23681, 2021, doi: <a href=\"https://doi.org/10.1364/OE.427424\">10.1364/OE.427424</a>.","chicago":"Kress, Christian, Meysam Bahmanian, Tobias Schwabe, and J. Christoph Scheytt. “Analysis of the Effects of Jitter, Relative Intensity Noise, and Nonlinearity on a Photonic Digital-to-Analog Converter Based on Optical Nyquist Pulse Synthesis.” <i>Opt. Express</i> 29, no. 15 (2021): 23671–23681. <a href=\"https://doi.org/10.1364/OE.427424\">https://doi.org/10.1364/OE.427424</a>.","apa":"Kress, C., Bahmanian, M., Schwabe, T., &#38; Scheytt, J. C. (2021). Analysis of the effects of jitter, relative intensity noise, and nonlinearity on a photonic digital-to-analog converter based on optical Nyquist pulse synthesis. <i>Opt. Express</i>, <i>29</i>(15), 23671–23681. <a href=\"https://doi.org/10.1364/OE.427424\">https://doi.org/10.1364/OE.427424</a>","mla":"Kress, Christian, et al. “Analysis of the Effects of Jitter, Relative Intensity Noise, and Nonlinearity on a Photonic Digital-to-Analog Converter Based on Optical Nyquist Pulse Synthesis.” <i>Opt. Express</i>, vol. 29, no. 15, OSA, 2021, pp. 23671–23681, doi:<a href=\"https://doi.org/10.1364/OE.427424\">10.1364/OE.427424</a>.","short":"C. Kress, M. Bahmanian, T. Schwabe, J.C. Scheytt, Opt. Express 29 (2021) 23671–23681.","bibtex":"@article{Kress_Bahmanian_Schwabe_Scheytt_2021, title={Analysis of the effects of jitter, relative intensity noise, and nonlinearity on a photonic digital-to-analog converter based on optical Nyquist pulse synthesis}, volume={29}, DOI={<a href=\"https://doi.org/10.1364/OE.427424\">10.1364/OE.427424</a>}, number={15}, journal={Opt. Express}, publisher={OSA}, author={Kress, Christian and Bahmanian, Meysam and Schwabe, Tobias and Scheytt, J. Christoph}, year={2021}, pages={23671–23681} }"},"intvolume":"        29","page":"23671–23681","keyword":["Analog to digital converters","Diode lasers","Laser sources","Phase noise","Signal processing","Wavelength division multiplexers"],"language":[{"iso":"eng"}],"publication":"Opt. Express","abstract":[{"text":"An analysis of an optical Nyquist pulse synthesizer using Mach-Zehnder modulators is presented. The analysis allows to predict the upper limit of the effective number of bits of this type of photonic digital-to-analog converter. The analytical solution has been verified by means of electro-optic simulations. With this analysis the limiting factor for certain scenarios: relative intensity noise, distortions by driving the Mach-Zehnder modulator, or the signal generator phase noise can quickly be identified.","lang":"eng"}],"publisher":"OSA","date_created":"2022-01-10T11:51:47Z","title":"Analysis of the effects of jitter, relative intensity noise, and nonlinearity on a photonic digital-to-analog converter based on optical Nyquist pulse synthesis","issue":"15","year":"2021"},{"date_updated":"2025-02-25T05:53:51Z","author":[{"first_name":"Stephan","last_name":"Kruse","full_name":"Kruse, Stephan","id":"38254"},{"first_name":"Meysam","last_name":"Bahmanian","id":"69233","full_name":"Bahmanian, Meysam"},{"last_name":"Kneuper","id":"47367","full_name":"Kneuper, Pascal","first_name":"Pascal"},{"first_name":"Christian","id":"13256","full_name":"Kress, Christian","last_name":"Kress"},{"last_name":"Kurz","full_name":"Kurz, Heiko G.","first_name":"Heiko G."},{"last_name":"Schneider","full_name":"Schneider, Thomas","first_name":"Thomas"},{"first_name":"Christoph","orcid":"https://orcid.org/0000-0002-5950-6618","last_name":"Scheytt","full_name":"Scheytt, Christoph","id":"37144"}],"date_created":"2021-09-09T08:34:16Z","title":"Phase Noise Investigation for a Radar System with Optical Clock Distribution ","doi":"10.1109/EuRAD48048.2021.00018","year":"2021","place":"Jaarbeurs Utrecht, Netherlands ","citation":{"chicago":"Kruse, Stephan, Meysam Bahmanian, Pascal Kneuper, Christian Kress, Heiko G. Kurz, Thomas Schneider, and Christoph Scheytt. “Phase Noise Investigation for a Radar System with Optical Clock Distribution .” In <i>The 17th European Radar Conference</i>. Jaarbeurs Utrecht, Netherlands , 2021. <a href=\"https://doi.org/10.1109/EuRAD48048.2021.00018\">https://doi.org/10.1109/EuRAD48048.2021.00018</a>.","ieee":"S. Kruse <i>et al.</i>, “Phase Noise Investigation for a Radar System with Optical Clock Distribution ,” 2021, doi: <a href=\"https://doi.org/10.1109/EuRAD48048.2021.00018\">10.1109/EuRAD48048.2021.00018</a>.","ama":"Kruse S, Bahmanian M, Kneuper P, et al. Phase Noise Investigation for a Radar System with Optical Clock Distribution . In: <i>The 17th European Radar Conference</i>. ; 2021. doi:<a href=\"https://doi.org/10.1109/EuRAD48048.2021.00018\">10.1109/EuRAD48048.2021.00018</a>","mla":"Kruse, Stephan, et al. “Phase Noise Investigation for a Radar System with Optical Clock Distribution .” <i>The 17th European Radar Conference</i>, 2021, doi:<a href=\"https://doi.org/10.1109/EuRAD48048.2021.00018\">10.1109/EuRAD48048.2021.00018</a>.","bibtex":"@inproceedings{Kruse_Bahmanian_Kneuper_Kress_Kurz_Schneider_Scheytt_2021, place={Jaarbeurs Utrecht, Netherlands }, title={Phase Noise Investigation for a Radar System with Optical Clock Distribution }, DOI={<a href=\"https://doi.org/10.1109/EuRAD48048.2021.00018\">10.1109/EuRAD48048.2021.00018</a>}, booktitle={The 17th European Radar Conference}, author={Kruse, Stephan and Bahmanian, Meysam and Kneuper, Pascal and Kress, Christian and Kurz, Heiko G. and Schneider, Thomas and Scheytt, Christoph}, year={2021} }","short":"S. Kruse, M. Bahmanian, P. Kneuper, C. Kress, H.G. Kurz, T. Schneider, C. Scheytt, in: The 17th European Radar Conference, Jaarbeurs Utrecht, Netherlands , 2021.","apa":"Kruse, S., Bahmanian, M., Kneuper, P., Kress, C., Kurz, H. G., Schneider, T., &#38; Scheytt, C. (2021). Phase Noise Investigation for a Radar System with Optical Clock Distribution . <i>The 17th European Radar Conference</i>. <a href=\"https://doi.org/10.1109/EuRAD48048.2021.00018\">https://doi.org/10.1109/EuRAD48048.2021.00018</a>"},"_id":"23995","user_id":"38254","department":[{"_id":"58"},{"_id":"230"}],"language":[{"iso":"eng"}],"type":"conference","publication":"The 17th European Radar Conference","status":"public"},{"date_created":"2021-09-09T08:30:04Z","author":[{"first_name":"Meysam","full_name":"Bahmanian, Meysam","id":"69233","last_name":"Bahmanian"},{"orcid":"0000-0002-5950-6618 ","last_name":"Scheytt","id":"37144","full_name":"Scheytt, Christoph","first_name":"Christoph"}],"volume":69,"date_updated":"2025-03-10T14:10:18Z","doi":"10.1109/tmtt.2020.3047647","title":"A 2-20-GHz Ultralow Phase Noise Signal Source Using a Microwave Oscillator Locked to a Mode-Locked Laser","issue":"3","citation":{"ieee":"M. Bahmanian and C. Scheytt, “A 2-20-GHz Ultralow Phase Noise Signal Source Using a Microwave Oscillator Locked to a Mode-Locked Laser,” <i>IEEE Transactions on Microwave Theory and Techniques</i>, vol. 69, no. 3, pp. 1635–1645, 2021, doi: <a href=\"https://doi.org/10.1109/tmtt.2020.3047647\">10.1109/tmtt.2020.3047647</a>.","chicago":"Bahmanian, Meysam, and Christoph Scheytt. “A 2-20-GHz Ultralow Phase Noise Signal Source Using a Microwave Oscillator Locked to a Mode-Locked Laser.” <i>IEEE Transactions on Microwave Theory and Techniques</i> 69, no. 3 (2021): 1635–45. <a href=\"https://doi.org/10.1109/tmtt.2020.3047647\">https://doi.org/10.1109/tmtt.2020.3047647</a>.","ama":"Bahmanian M, Scheytt C. A 2-20-GHz Ultralow Phase Noise Signal Source Using a Microwave Oscillator Locked to a Mode-Locked Laser. <i>IEEE Transactions on Microwave Theory and Techniques</i>. 2021;69(3):1635-1645. doi:<a href=\"https://doi.org/10.1109/tmtt.2020.3047647\">10.1109/tmtt.2020.3047647</a>","bibtex":"@article{Bahmanian_Scheytt_2021, title={A 2-20-GHz Ultralow Phase Noise Signal Source Using a Microwave Oscillator Locked to a Mode-Locked Laser}, volume={69}, DOI={<a href=\"https://doi.org/10.1109/tmtt.2020.3047647\">10.1109/tmtt.2020.3047647</a>}, number={3}, journal={IEEE Transactions on Microwave Theory and Techniques}, author={Bahmanian, Meysam and Scheytt, Christoph}, year={2021}, pages={1635–1645} }","short":"M. Bahmanian, C. Scheytt, IEEE Transactions on Microwave Theory and Techniques 69 (2021) 1635–1645.","mla":"Bahmanian, Meysam, and Christoph Scheytt. “A 2-20-GHz Ultralow Phase Noise Signal Source Using a Microwave Oscillator Locked to a Mode-Locked Laser.” <i>IEEE Transactions on Microwave Theory and Techniques</i>, vol. 69, no. 3, 2021, pp. 1635–45, doi:<a href=\"https://doi.org/10.1109/tmtt.2020.3047647\">10.1109/tmtt.2020.3047647</a>.","apa":"Bahmanian, M., &#38; Scheytt, C. (2021). A 2-20-GHz Ultralow Phase Noise Signal Source Using a Microwave Oscillator Locked to a Mode-Locked Laser. <i>IEEE Transactions on Microwave Theory and Techniques</i>, <i>69</i>(3), 1635–1645. <a href=\"https://doi.org/10.1109/tmtt.2020.3047647\">https://doi.org/10.1109/tmtt.2020.3047647</a>"},"page":"1635-1645","intvolume":"        69","year":"2021","user_id":"69233","department":[{"_id":"58"}],"_id":"23993","language":[{"iso":"eng"}],"type":"journal_article","publication":"IEEE Transactions on Microwave Theory and Techniques","status":"public"},{"language":[{"iso":"eng"}],"_id":"24024","department":[{"_id":"58"},{"_id":"230"}],"user_id":"15931","abstract":[{"lang":"eng","text":"Recently it has been demonstrated that an optoelectronic phase-locked loop (OEPLL) using a mode-locked laser as a reference oscillator achieves significantly lower phase noise than conventional electronic frequency synthesizers. In this paper a concept for an OEPLL-based frequency synthesizer is presented and it is investigated how it can be used as a local oscillator (LO) for THz transceivers in order to improve the signal quality in THz wireless communications. The concept of the OEPLL is presented and it's measured phase noise is compared to the phase noise of a laboratory-grade electronic frequency synthesizer. The measured phase noise spectra of both synthesizers at 10 GHz are then used to model LO phase noise at 320 GHz. Based on models of generic zero-IF transmit and receive frontends, THz signals with different modulation formats and Baud rates are simulated at system level using the modeled LO phase noise for the two LO approaches. Finally, the results are compared."}],"status":"public","publication":"2020 Third International Workshop on Mobile Terahertz Systems (IWMTS)","type":"conference","title":"Ultra-Low Phase Noise Frequency Synthesis for THz Communications Using Optoelectronic PLLs","conference":{"start_date":"2020.07.01","location":"Essen, Germany ","end_date":"2020.07.02"},"doi":"10.1109/IWMTS49292.2020.9166347","date_updated":"2023-01-11T07:18:47Z","author":[{"first_name":"Christoph","full_name":"Scheytt, Christoph","id":"37144","last_name":"Scheytt","orcid":"https://orcid.org/0000-0002-5950-6618"},{"first_name":"Dominik","full_name":"Wrana, Dominik","last_name":"Wrana"},{"id":"69233","full_name":"Bahmanian, Meysam","last_name":"Bahmanian","first_name":"Meysam"},{"last_name":"Kallfass","full_name":"Kallfass, Ingmar","first_name":"Ingmar"}],"date_created":"2021-09-09T11:50:15Z","year":"2020","citation":{"apa":"Scheytt, C., Wrana, D., Bahmanian, M., &#38; Kallfass, I. (2020). Ultra-Low Phase Noise Frequency Synthesis for THz Communications Using Optoelectronic PLLs. <i>2020 Third International Workshop on Mobile Terahertz Systems (IWMTS)</i>. <a href=\"https://doi.org/10.1109/IWMTS49292.2020.9166347\">https://doi.org/10.1109/IWMTS49292.2020.9166347</a>","mla":"Scheytt, Christoph, et al. “Ultra-Low Phase Noise Frequency Synthesis for THz Communications Using Optoelectronic PLLs.” <i>2020 Third International Workshop on Mobile Terahertz Systems (IWMTS)</i>, 2020, doi:<a href=\"https://doi.org/10.1109/IWMTS49292.2020.9166347\">10.1109/IWMTS49292.2020.9166347</a>.","short":"C. Scheytt, D. Wrana, M. Bahmanian, I. Kallfass, in: 2020 Third International Workshop on Mobile Terahertz Systems (IWMTS), 2020.","bibtex":"@inproceedings{Scheytt_Wrana_Bahmanian_Kallfass_2020, title={Ultra-Low Phase Noise Frequency Synthesis for THz Communications Using Optoelectronic PLLs}, DOI={<a href=\"https://doi.org/10.1109/IWMTS49292.2020.9166347\">10.1109/IWMTS49292.2020.9166347</a>}, booktitle={2020 Third International Workshop on Mobile Terahertz Systems (IWMTS)}, author={Scheytt, Christoph and Wrana, Dominik and Bahmanian, Meysam and Kallfass, Ingmar}, year={2020} }","ama":"Scheytt C, Wrana D, Bahmanian M, Kallfass I. Ultra-Low Phase Noise Frequency Synthesis for THz Communications Using Optoelectronic PLLs. In: <i>2020 Third International Workshop on Mobile Terahertz Systems (IWMTS)</i>. ; 2020. doi:<a href=\"https://doi.org/10.1109/IWMTS49292.2020.9166347\">10.1109/IWMTS49292.2020.9166347</a>","chicago":"Scheytt, Christoph, Dominik Wrana, Meysam Bahmanian, and Ingmar Kallfass. “Ultra-Low Phase Noise Frequency Synthesis for THz Communications Using Optoelectronic PLLs.” In <i>2020 Third International Workshop on Mobile Terahertz Systems (IWMTS)</i>, 2020. <a href=\"https://doi.org/10.1109/IWMTS49292.2020.9166347\">https://doi.org/10.1109/IWMTS49292.2020.9166347</a>.","ieee":"C. Scheytt, D. Wrana, M. Bahmanian, and I. Kallfass, “Ultra-Low Phase Noise Frequency Synthesis for THz Communications Using Optoelectronic PLLs,” Essen, Germany , 2020, doi: <a href=\"https://doi.org/10.1109/IWMTS49292.2020.9166347\">10.1109/IWMTS49292.2020.9166347</a>."},"related_material":{"link":[{"relation":"confirmation","url":"https://ieeexplore.ieee.org/document/9166347"}]}},{"place":"Los Angeles, CA, USA, USA","year":"2020","citation":{"ieee":"M. Bahmanian, S. Fard, B. Koppelmann, and C. Scheytt, “Wide-Band Frequency Synthesizer with Ultra-Low Phase Noise Using an Optical Clock Source,” 2020, doi: <a href=\"https://doi.org/10.1109/IMS30576.2020.9224118\">10.1109/IMS30576.2020.9224118</a>.","chicago":"Bahmanian, Meysam, Saeed Fard, Bastian Koppelmann, and Christoph Scheytt. “Wide-Band Frequency Synthesizer with Ultra-Low Phase Noise Using an Optical Clock Source.” In <i> 2020 IEEE/MTT-S International Microwave Symposium (IMS)</i>. Los Angeles, CA, USA, USA: IEEE, 2020. <a href=\"https://doi.org/10.1109/IMS30576.2020.9224118\">https://doi.org/10.1109/IMS30576.2020.9224118</a>.","ama":"Bahmanian M, Fard S, Koppelmann B, Scheytt C. Wide-Band Frequency Synthesizer with Ultra-Low Phase Noise Using an Optical Clock Source. In: <i> 2020 IEEE/MTT-S International Microwave Symposium (IMS)</i>. IEEE; 2020. doi:<a href=\"https://doi.org/10.1109/IMS30576.2020.9224118\">10.1109/IMS30576.2020.9224118</a>","apa":"Bahmanian, M., Fard, S., Koppelmann, B., &#38; Scheytt, C. (2020). Wide-Band Frequency Synthesizer with Ultra-Low Phase Noise Using an Optical Clock Source. <i> 2020 IEEE/MTT-S International Microwave Symposium (IMS)</i>. <a href=\"https://doi.org/10.1109/IMS30576.2020.9224118\">https://doi.org/10.1109/IMS30576.2020.9224118</a>","mla":"Bahmanian, Meysam, et al. “Wide-Band Frequency Synthesizer with Ultra-Low Phase Noise Using an Optical Clock Source.” <i> 2020 IEEE/MTT-S International Microwave Symposium (IMS)</i>, IEEE, 2020, doi:<a href=\"https://doi.org/10.1109/IMS30576.2020.9224118\">10.1109/IMS30576.2020.9224118</a>.","bibtex":"@inproceedings{Bahmanian_Fard_Koppelmann_Scheytt_2020, place={Los Angeles, CA, USA, USA}, title={Wide-Band Frequency Synthesizer with Ultra-Low Phase Noise Using an Optical Clock Source}, DOI={<a href=\"https://doi.org/10.1109/IMS30576.2020.9224118\">10.1109/IMS30576.2020.9224118</a>}, booktitle={ 2020 IEEE/MTT-S International Microwave Symposium (IMS)}, publisher={IEEE}, author={Bahmanian, Meysam and Fard, Saeed and Koppelmann, Bastian and Scheytt, Christoph}, year={2020} }","short":"M. Bahmanian, S. Fard, B. Koppelmann, C. Scheytt, in:  2020 IEEE/MTT-S International Microwave Symposium (IMS), IEEE, Los Angeles, CA, USA, USA, 2020."},"related_material":{"link":[{"url":"https://ieeexplore.ieee.org/document/9224118","relation":"confirmation"}]},"title":"Wide-Band Frequency Synthesizer with Ultra-Low Phase Noise Using an Optical Clock Source","doi":"10.1109/IMS30576.2020.9224118","conference":{"start_date":"2020.08.04","end_date":"2020.08.06"},"date_updated":"2023-02-01T08:37:34Z","publisher":"IEEE","author":[{"full_name":"Bahmanian, Meysam","id":"69233","last_name":"Bahmanian","first_name":"Meysam"},{"first_name":"Saeed","id":"88494","full_name":"Fard, Saeed","last_name":"Fard"},{"last_name":"Koppelmann","full_name":"Koppelmann, Bastian","id":"25260","first_name":"Bastian"},{"first_name":"Christoph","orcid":"https://orcid.org/0000-0002-5950-6618","last_name":"Scheytt","full_name":"Scheytt, Christoph","id":"37144"}],"date_created":"2021-09-09T11:50:14Z","abstract":[{"text":"This paper presents an ultra-wideband and ultra-low noise frequency synthesizer using a mode-locked laser as its reference. The frequency synthesizer can lock in the frequency range from 2 GHz to 20 GHz on any harmonic of a mode-locked laser optical pulse train. The integrated rms-jitter (1 kHz-100 MHz) of the synthesizer is less than 5 fs in the frequency range from 4 GHz to 20 GHz with a typical value of 4 fs and a minimum of 3 fs. This is the first reported wideband phase locked loop achieving sub-10 fs rms-jitter for offset frequencies larger than 1 kHz.","lang":"eng"}],"status":"public","type":"conference","publication":" 2020 IEEE/MTT-S International Microwave Symposium (IMS)","language":[{"iso":"eng"}],"_id":"24023","user_id":"15931","department":[{"_id":"58"},{"_id":"230"}]},{"related_material":{"link":[{"url":"https://ieeexplore.ieee.org/document/8892046","relation":"confirmation"}]},"year":"2019","place":"Ottawa, ON, Canada, Canada","citation":{"ama":"Bahmanian M, Tiedau J, Silberhorn C, Scheytt C. Octave-Band Microwave Frequency Synthesizer Using Mode-Locked Laser as a Reference. In: <i>2019 International Topical Meeting on Microwave Photonics (MWP)</i>. ; 2019:1-4. doi:<a href=\"https://doi.org/10.1109/MWP.2019.8892046\">10.1109/MWP.2019.8892046</a>","chicago":"Bahmanian, Meysam, Johannes Tiedau, Christine Silberhorn, and Christoph Scheytt. “Octave-Band Microwave Frequency Synthesizer Using Mode-Locked Laser as a Reference.” In <i>2019 International Topical Meeting on Microwave Photonics (MWP)</i>, 1–4. Ottawa, ON, Canada, Canada, 2019. <a href=\"https://doi.org/10.1109/MWP.2019.8892046\">https://doi.org/10.1109/MWP.2019.8892046</a>.","ieee":"M. Bahmanian, J. Tiedau, C. Silberhorn, and C. Scheytt, “Octave-Band Microwave Frequency Synthesizer Using Mode-Locked Laser as a Reference,” in <i>2019 International Topical Meeting on Microwave Photonics (MWP)</i>, 2019, pp. 1–4, doi: <a href=\"https://doi.org/10.1109/MWP.2019.8892046\">10.1109/MWP.2019.8892046</a>.","mla":"Bahmanian, Meysam, et al. “Octave-Band Microwave Frequency Synthesizer Using Mode-Locked Laser as a Reference.” <i>2019 International Topical Meeting on Microwave Photonics (MWP)</i>, 2019, pp. 1–4, doi:<a href=\"https://doi.org/10.1109/MWP.2019.8892046\">10.1109/MWP.2019.8892046</a>.","bibtex":"@inproceedings{Bahmanian_Tiedau_Silberhorn_Scheytt_2019, place={Ottawa, ON, Canada, Canada}, title={Octave-Band Microwave Frequency Synthesizer Using Mode-Locked Laser as a Reference}, DOI={<a href=\"https://doi.org/10.1109/MWP.2019.8892046\">10.1109/MWP.2019.8892046</a>}, booktitle={2019 International Topical Meeting on Microwave Photonics (MWP)}, author={Bahmanian, Meysam and Tiedau, Johannes and Silberhorn, Christine and Scheytt, Christoph}, year={2019}, pages={1–4} }","short":"M. Bahmanian, J. Tiedau, C. Silberhorn, C. Scheytt, in: 2019 International Topical Meeting on Microwave Photonics (MWP), Ottawa, ON, Canada, Canada, 2019, pp. 1–4.","apa":"Bahmanian, M., Tiedau, J., Silberhorn, C., &#38; Scheytt, C. (2019). Octave-Band Microwave Frequency Synthesizer Using Mode-Locked Laser as a Reference. <i>2019 International Topical Meeting on Microwave Photonics (MWP)</i>, 1–4. <a href=\"https://doi.org/10.1109/MWP.2019.8892046\">https://doi.org/10.1109/MWP.2019.8892046</a>"},"page":"1-4","date_updated":"2022-01-31T15:17:38Z","date_created":"2021-09-09T12:26:10Z","author":[{"last_name":"Bahmanian","full_name":"Bahmanian, Meysam","id":"69233","first_name":"Meysam"},{"last_name":"Tiedau","full_name":"Tiedau, Johannes","first_name":"Johannes"},{"last_name":"Silberhorn","id":"26263","full_name":"Silberhorn, Christine","first_name":"Christine"},{"full_name":"Scheytt, Christoph","id":"37144","last_name":"Scheytt","first_name":"Christoph"}],"title":"Octave-Band Microwave Frequency Synthesizer Using Mode-Locked Laser as a Reference","doi":"10.1109/MWP.2019.8892046","conference":{"end_date":"2019.10.10","start_date":"2019.10.07"},"type":"conference","publication":"2019 International Topical Meeting on Microwave Photonics (MWP)","abstract":[{"text":"An octave-band voltage-controlled oscillator is phase-locked on the envelope of the pulse train from a mode-locked laser. The locking scheme employs a balanced Mach-Zehnder modulator with two photodiodes as a phase detector. The phase.locked loop has a loop bandwidth of approximately 1MHz and an in-band phase noise of approximately -135dBc/Hz at all frequencies. The integrated jitter from 1kHz to 100MHz is 21fs, 18.3fs and 13.8fs at 5.016GHz, 7.6GHz and 10.032GHz carrier frequencies, respectively. To the authors' knowledge, this is the best jitter performance reported for a PLL with MZM-based phase detection and the first reported PLL of this type featuring an octave-band frequency range.","lang":"eng"}],"status":"public","_id":"24055","user_id":"69233","department":[{"_id":"58"}],"language":[{"iso":"eng"}]},{"status":"public","type":"misc","language":[{"iso":"eng"}],"user_id":"69233","department":[{"_id":"58"},{"_id":"230"}],"_id":"24792","citation":{"bibtex":"@book{Bahmanian_Scheytt_2019, place={Meiningen, Deutschland}, title={Theory of an Optoelectronic Microwave Phase-locked Loop based on a MLL reference and MZM-based Optoelectronic Phase Detection}, author={Bahmanian, Meysam and Scheytt, Christoph}, year={2019} }","short":"M. Bahmanian, C. Scheytt, Theory of an Optoelectronic Microwave Phase-Locked Loop Based on a MLL Reference and MZM-Based Optoelectronic Phase Detection, Meiningen, Deutschland, 2019.","mla":"Bahmanian, Meysam, and Christoph Scheytt. <i>Theory of an Optoelectronic Microwave Phase-Locked Loop Based on a MLL Reference and MZM-Based Optoelectronic Phase Detection</i>. 2019.","apa":"Bahmanian, M., &#38; Scheytt, C. (2019). <i>Theory of an Optoelectronic Microwave Phase-locked Loop based on a MLL reference and MZM-based Optoelectronic Phase Detection</i>.","ieee":"M. Bahmanian and C. Scheytt, <i>Theory of an Optoelectronic Microwave Phase-locked Loop based on a MLL reference and MZM-based Optoelectronic Phase Detection</i>. Meiningen, Deutschland, 2019.","chicago":"Bahmanian, Meysam, and Christoph Scheytt. <i>Theory of an Optoelectronic Microwave Phase-Locked Loop Based on a MLL Reference and MZM-Based Optoelectronic Phase Detection</i>. Meiningen, Deutschland, 2019.","ama":"Bahmanian M, Scheytt C. <i>Theory of an Optoelectronic Microwave Phase-Locked Loop Based on a MLL Reference and MZM-Based Optoelectronic Phase Detection</i>.; 2019."},"place":"Meiningen, Deutschland","year":"2019","title":"Theory of an Optoelectronic Microwave Phase-locked Loop based on a MLL reference and MZM-based Optoelectronic Phase Detection","author":[{"last_name":"Bahmanian","full_name":"Bahmanian, Meysam","id":"69233","first_name":"Meysam"},{"full_name":"Scheytt, Christoph","id":"37144","last_name":"Scheytt","orcid":"https://orcid.org/0000-0002-5950-6618","first_name":"Christoph"}],"date_created":"2021-09-22T08:07:44Z","date_updated":"2023-01-19T08:32:58Z"}]