[{"language":[{"iso":"eng"}],"keyword":["adaptive DC-link voltage","cascaded H-bridge","resonant operation","Full-Bridge Converter","loss minimization","LLC Resonant Converter","peak capacitor voltage reduction"],"abstract":[{"lang":"eng","text":"The LLC converter achieves the highest efficiency in resonant operation. Conventionally, the input DC-link voltage is controlled to operate the LLC converter at resonance for the given operating point. However, the DC-link capacitor voltage shows a low-frequency voltage ripple (typically the second harmonic of grid frequency) in cascaded converters so that the LLC has to adapt its switching frequency within the grid period. Conventionally, the LLC converter operates 50% of the time above the resonant frequency of 40 kHz and 50% below resonance. Both operating conditions cause additional losses. However, experimental measurements indicate that the below-resonance operation causes significantly higher losses than above-resonance operation due to much higher primary and secondary transformer currents. It is better to increase the DC-link voltage by 30% of the peak-to-peak low-frequency voltage ripple to mostly avoid below-resonance operation (i.e., from 650 V to 680 V in this case). With the proposed control, the LLC converter operates about 75% of time over resonance and only 25% of time below resonance. The overall efficiency increases from 97.66% to 97.7% for the average operating point with an 80% load current. This corresponds to a 2% total loss reduction. Finally, the peak resonance capacitor voltage decreases from 910 V to 790 V (−13%)."}],"publication":"Electronics","title":"Adaptive DC-Link Voltage Control for 22 kW, 40 kHz LLC Resonant Converter Considering Low-Frequency Voltage Ripple","date_created":"2025-05-05T12:27:39Z","publisher":"MDPI AG","year":"2025","issue":"8","article_number":"1517","user_id":"34289","department":[{"_id":"52"}],"_id":"59805","status":"public","type":"journal_article","main_file_link":[{"url":"https://www.mdpi.com/2079-9292/14/8/1517"}],"doi":"10.3390/electronics14081517","author":[{"last_name":"Unruh","id":"34289","full_name":"Unruh, Roland","first_name":"Roland"},{"first_name":"Joachim","id":"66","full_name":"Böcker, Joachim","orcid":"0000-0002-8480-7295","last_name":"Böcker"},{"id":"71291","full_name":"Schafmeister, Frank","last_name":"Schafmeister","first_name":"Frank"}],"volume":14,"date_updated":"2025-05-05T12:34:00Z","citation":{"ama":"Unruh R, Böcker J, Schafmeister F. Adaptive DC-Link Voltage Control for 22 kW, 40 kHz LLC Resonant Converter Considering Low-Frequency Voltage Ripple. <i>Electronics</i>. 2025;14(8). doi:<a href=\"https://doi.org/10.3390/electronics14081517\">10.3390/electronics14081517</a>","ieee":"R. Unruh, J. Böcker, and F. Schafmeister, “Adaptive DC-Link Voltage Control for 22 kW, 40 kHz LLC Resonant Converter Considering Low-Frequency Voltage Ripple,” <i>Electronics</i>, vol. 14, no. 8, Art. no. 1517, 2025, doi: <a href=\"https://doi.org/10.3390/electronics14081517\">10.3390/electronics14081517</a>.","chicago":"Unruh, Roland, Joachim Böcker, and Frank Schafmeister. “Adaptive DC-Link Voltage Control for 22 KW, 40 KHz LLC Resonant Converter Considering Low-Frequency Voltage Ripple.” <i>Electronics</i> 14, no. 8 (2025). <a href=\"https://doi.org/10.3390/electronics14081517\">https://doi.org/10.3390/electronics14081517</a>.","apa":"Unruh, R., Böcker, J., &#38; Schafmeister, F. (2025). Adaptive DC-Link Voltage Control for 22 kW, 40 kHz LLC Resonant Converter Considering Low-Frequency Voltage Ripple. <i>Electronics</i>, <i>14</i>(8), Article 1517. <a href=\"https://doi.org/10.3390/electronics14081517\">https://doi.org/10.3390/electronics14081517</a>","mla":"Unruh, Roland, et al. “Adaptive DC-Link Voltage Control for 22 KW, 40 KHz LLC Resonant Converter Considering Low-Frequency Voltage Ripple.” <i>Electronics</i>, vol. 14, no. 8, 1517, MDPI AG, 2025, doi:<a href=\"https://doi.org/10.3390/electronics14081517\">10.3390/electronics14081517</a>.","short":"R. Unruh, J. Böcker, F. Schafmeister, Electronics 14 (2025).","bibtex":"@article{Unruh_Böcker_Schafmeister_2025, title={Adaptive DC-Link Voltage Control for 22 kW, 40 kHz LLC Resonant Converter Considering Low-Frequency Voltage Ripple}, volume={14}, DOI={<a href=\"https://doi.org/10.3390/electronics14081517\">10.3390/electronics14081517</a>}, number={81517}, journal={Electronics}, publisher={MDPI AG}, author={Unruh, Roland and Böcker, Joachim and Schafmeister, Frank}, year={2025} }"},"intvolume":"        14","publication_status":"published","publication_identifier":{"issn":["2079-9292"]}},{"status":"public","publication":"ICASSP 2025 - 2025 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)","type":"conference","language":[{"iso":"eng"}],"department":[{"_id":"54"},{"_id":"660"}],"user_id":"72602","_id":"59999","project":[{"grant_number":"438445824","_id":"129","name":"TRR 318 - C06: TRR 318 - Technisch unterstütztes Erklären von Stimmcharakteristika (Teilprojekt C06)"}],"citation":{"ama":"Rautenberg F, Kuhlmann M, Seebauer F, Wiechmann J, Wagner P, Haeb-Umbach R. Speech Synthesis along Perceptual Voice Quality Dimensions. In: <i>ICASSP 2025 - 2025 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)</i>. IEEE; 2025. doi:<a href=\"https://doi.org/10.1109/icassp49660.2025.10888012\">10.1109/icassp49660.2025.10888012</a>","chicago":"Rautenberg, Frederik, Michael Kuhlmann, Fritz Seebauer, Jana Wiechmann, Petra Wagner, and Reinhold Haeb-Umbach. “Speech Synthesis along Perceptual Voice Quality Dimensions.” In <i>ICASSP 2025 - 2025 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)</i>. IEEE, 2025. <a href=\"https://doi.org/10.1109/icassp49660.2025.10888012\">https://doi.org/10.1109/icassp49660.2025.10888012</a>.","ieee":"F. Rautenberg, M. Kuhlmann, F. Seebauer, J. Wiechmann, P. Wagner, and R. Haeb-Umbach, “Speech Synthesis along Perceptual Voice Quality Dimensions,” presented at the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Hyderabad, India , 2025, doi: <a href=\"https://doi.org/10.1109/icassp49660.2025.10888012\">10.1109/icassp49660.2025.10888012</a>.","bibtex":"@inproceedings{Rautenberg_Kuhlmann_Seebauer_Wiechmann_Wagner_Haeb-Umbach_2025, title={Speech Synthesis along Perceptual Voice Quality Dimensions}, DOI={<a href=\"https://doi.org/10.1109/icassp49660.2025.10888012\">10.1109/icassp49660.2025.10888012</a>}, booktitle={ICASSP 2025 - 2025 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, publisher={IEEE}, author={Rautenberg, Frederik and Kuhlmann, Michael and Seebauer, Fritz and Wiechmann, Jana and Wagner, Petra and Haeb-Umbach, Reinhold}, year={2025} }","short":"F. Rautenberg, M. Kuhlmann, F. Seebauer, J. Wiechmann, P. Wagner, R. Haeb-Umbach, in: ICASSP 2025 - 2025 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), IEEE, 2025.","mla":"Rautenberg, Frederik, et al. “Speech Synthesis along Perceptual Voice Quality Dimensions.” <i>ICASSP 2025 - 2025 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)</i>, IEEE, 2025, doi:<a href=\"https://doi.org/10.1109/icassp49660.2025.10888012\">10.1109/icassp49660.2025.10888012</a>.","apa":"Rautenberg, F., Kuhlmann, M., Seebauer, F., Wiechmann, J., Wagner, P., &#38; Haeb-Umbach, R. (2025). Speech Synthesis along Perceptual Voice Quality Dimensions. <i>ICASSP 2025 - 2025 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)</i>. IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Hyderabad, India . <a href=\"https://doi.org/10.1109/icassp49660.2025.10888012\">https://doi.org/10.1109/icassp49660.2025.10888012</a>"},"year":"2025","publication_status":"published","conference":{"name":"IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)","start_date":"2025-04-06","end_date":"2025-04-11","location":"Hyderabad, India "},"doi":"10.1109/icassp49660.2025.10888012","title":"Speech Synthesis along Perceptual Voice Quality Dimensions","date_created":"2025-05-20T08:17:22Z","author":[{"first_name":"Frederik","last_name":"Rautenberg","full_name":"Rautenberg, Frederik","id":"72602"},{"id":"49871","full_name":"Kuhlmann, Michael","last_name":"Kuhlmann","first_name":"Michael"},{"first_name":"Fritz","full_name":"Seebauer, Fritz","last_name":"Seebauer"},{"last_name":"Wiechmann","full_name":"Wiechmann, Jana","first_name":"Jana"},{"first_name":"Petra","last_name":"Wagner","full_name":"Wagner, Petra"},{"full_name":"Haeb-Umbach, Reinhold","id":"242","last_name":"Haeb-Umbach","first_name":"Reinhold"}],"publisher":"IEEE","date_updated":"2025-05-26T11:09:56Z"},{"publication_identifier":{"issn":["0960-1481"]},"publication_status":"published","citation":{"ama":"Ahmadi M, Knorr L, Meschede H. Improvement of Wind Power Utilization Through Flexible Operation of Data Center in Wind Parks. <i>Renewable Energy</i>. Published online 2025. doi:<a href=\"https://doi.org/10.1016/j.renene.2025.123073\">10.1016/j.renene.2025.123073</a>","ieee":"M. Ahmadi, L. Knorr, and H. Meschede, “Improvement of Wind Power Utilization Through Flexible Operation of Data Center in Wind Parks,” <i>Renewable Energy</i>, Art. no. 123073, 2025, doi: <a href=\"https://doi.org/10.1016/j.renene.2025.123073\">10.1016/j.renene.2025.123073</a>.","chicago":"Ahmadi, Mehdi, Lukas Knorr, and Henning Meschede. “Improvement of Wind Power Utilization Through Flexible Operation of Data Center in Wind Parks.” <i>Renewable Energy</i>, 2025. <a href=\"https://doi.org/10.1016/j.renene.2025.123073\">https://doi.org/10.1016/j.renene.2025.123073</a>.","short":"M. Ahmadi, L. Knorr, H. Meschede, Renewable Energy (2025).","mla":"Ahmadi, Mehdi, et al. “Improvement of Wind Power Utilization Through Flexible Operation of Data Center in Wind Parks.” <i>Renewable Energy</i>, 123073, Elsevier BV, 2025, doi:<a href=\"https://doi.org/10.1016/j.renene.2025.123073\">10.1016/j.renene.2025.123073</a>.","bibtex":"@article{Ahmadi_Knorr_Meschede_2025, title={Improvement of Wind Power Utilization Through Flexible Operation of Data Center in Wind Parks}, DOI={<a href=\"https://doi.org/10.1016/j.renene.2025.123073\">10.1016/j.renene.2025.123073</a>}, number={123073}, journal={Renewable Energy}, publisher={Elsevier BV}, author={Ahmadi, Mehdi and Knorr, Lukas and Meschede, Henning}, year={2025} }","apa":"Ahmadi, M., Knorr, L., &#38; Meschede, H. (2025). Improvement of Wind Power Utilization Through Flexible Operation of Data Center in Wind Parks. <i>Renewable Energy</i>, Article 123073. <a href=\"https://doi.org/10.1016/j.renene.2025.123073\">https://doi.org/10.1016/j.renene.2025.123073</a>"},"year":"2025","author":[{"last_name":"Ahmadi","id":"98967","full_name":"Ahmadi, Mehdi","first_name":"Mehdi"},{"first_name":"Lukas","last_name":"Knorr","full_name":"Knorr, Lukas","id":"90391"},{"orcid":"0000-0002-1538-089X","last_name":"Meschede","id":"86954","full_name":"Meschede, Henning","first_name":"Henning"}],"date_created":"2025-04-11T23:27:51Z","publisher":"Elsevier BV","date_updated":"2025-05-26T11:11:21Z","doi":"10.1016/j.renene.2025.123073","title":"Improvement of Wind Power Utilization Through Flexible Operation of Data Center in Wind Parks","publication":"Renewable Energy","type":"journal_article","status":"public","department":[{"_id":"644"}],"user_id":"90391","_id":"59531","language":[{"iso":"eng"}],"article_number":"123073"},{"status":"public","type":"journal_article","article_number":"6","article_type":"original","funded_apc":"1","_id":"59995","project":[{"name":"VaMP: Vollständige Bestimmung der akustischen Materialparameter von Polymeren","_id":"89","grant_number":"409779252"}],"department":[{"_id":"49"}],"user_id":"32616","intvolume":"        36","citation":{"chicago":"Dreiling, Dmitrij, Dominik Itner, Hauke Gravenkamp, Leander Claes, Carolin Birk, and Bernd Henning. “Increasing the Sensitivity of Ultrasonic Transmission Measurements for Elastic Material Parameter Estimation.” <i>Measurement Science and Technology</i> 36 (2025). <a href=\"https://doi.org/10.1088/1361-6501/add9b6\">https://doi.org/10.1088/1361-6501/add9b6</a>.","ieee":"D. Dreiling, D. Itner, H. Gravenkamp, L. Claes, C. Birk, and B. Henning, “Increasing the sensitivity of ultrasonic transmission measurements for elastic material parameter estimation,” <i>Measurement Science and Technology</i>, vol. 36, Art. no. 6, 2025, doi: <a href=\"https://doi.org/10.1088/1361-6501/add9b6\">10.1088/1361-6501/add9b6</a>.","ama":"Dreiling D, Itner D, Gravenkamp H, Claes L, Birk C, Henning B. Increasing the sensitivity of ultrasonic transmission measurements for elastic material parameter estimation. <i>Measurement Science and Technology</i>. 2025;36. doi:<a href=\"https://doi.org/10.1088/1361-6501/add9b6\">10.1088/1361-6501/add9b6</a>","apa":"Dreiling, D., Itner, D., Gravenkamp, H., Claes, L., Birk, C., &#38; Henning, B. (2025). Increasing the sensitivity of ultrasonic transmission measurements for elastic material parameter estimation. <i>Measurement Science and Technology</i>, <i>36</i>, Article 6. <a href=\"https://doi.org/10.1088/1361-6501/add9b6\">https://doi.org/10.1088/1361-6501/add9b6</a>","short":"D. Dreiling, D. Itner, H. Gravenkamp, L. Claes, C. Birk, B. Henning, Measurement Science and Technology 36 (2025).","bibtex":"@article{Dreiling_Itner_Gravenkamp_Claes_Birk_Henning_2025, title={Increasing the sensitivity of ultrasonic transmission measurements for elastic material parameter estimation}, volume={36}, DOI={<a href=\"https://doi.org/10.1088/1361-6501/add9b6\">10.1088/1361-6501/add9b6</a>}, number={6}, journal={Measurement Science and Technology}, publisher={IOP Publishing}, author={Dreiling, Dmitrij and Itner, Dominik and Gravenkamp, Hauke and Claes, Leander and Birk, Carolin and Henning, Bernd}, year={2025} }","mla":"Dreiling, Dmitrij, et al. “Increasing the Sensitivity of Ultrasonic Transmission Measurements for Elastic Material Parameter Estimation.” <i>Measurement Science and Technology</i>, vol. 36, 6, IOP Publishing, 2025, doi:<a href=\"https://doi.org/10.1088/1361-6501/add9b6\">10.1088/1361-6501/add9b6</a>."},"publication_identifier":{"issn":["0957-0233","1361-6501"]},"publication_status":"published","doi":"10.1088/1361-6501/add9b6","main_file_link":[{"open_access":"1","url":"https://iopscience.iop.org/article/10.1088/1361-6501/add9b6"}],"oa":"1","date_updated":"2025-05-27T15:03:38Z","volume":36,"author":[{"last_name":"Dreiling","full_name":"Dreiling, Dmitrij","id":"32616","first_name":"Dmitrij"},{"full_name":"Itner, Dominik","last_name":"Itner","first_name":"Dominik"},{"full_name":"Gravenkamp, Hauke","last_name":"Gravenkamp","first_name":"Hauke"},{"id":"11829","full_name":"Claes, Leander","last_name":"Claes","orcid":"0000-0002-4393-268X","first_name":"Leander"},{"first_name":"Carolin","last_name":"Birk","full_name":"Birk, Carolin"},{"full_name":"Henning, Bernd","id":"213","last_name":"Henning","first_name":"Bernd"}],"abstract":[{"text":"<jats:title>Abstract</jats:title>\r\n               <jats:p>Ultrasonic transmission measurements can be used for material characterization, as the propagation time of sound waves and thus their velocity depends on the elastic material parameters. Measurement results for the elastic material parameters are acquired non-destructively using ultrasonic transmission measurements of hollow cylindrical polymer specimens. To determine the material parameters, an inverse approach is used comparing measurements with simulated data. Previous studies show that the procedure exhibits low sensitivity with respect to the shear parameters of the material. In order to increase the sensitivity, we propose to apply a spatially annular excitation on the base of the specimen. As a measure to analyse the sensitivities with respect to all parameters and their linear independence, we observe the volume of the parallelotope of the sensitivity vectors. Here, a scaled boundary finite element formulation of wave propagation in the specimen is expanded to yield derivative information directly, and a sensitivity analysis can be carried out efficiently. Finally, the results of this sensitivity analysis with regard to the annular excitation are also applied to the measurement setup.</jats:p>","lang":"eng"}],"publication":"Measurement Science and Technology","keyword":["Sensitivity analysis","Ultrasonic transducer","Guided waves","Polymers","Gram determinant"],"language":[{"iso":"eng"}],"year":"2025","quality_controlled":"1","title":"Increasing the sensitivity of ultrasonic transmission measurements for elastic material parameter estimation","publisher":"IOP Publishing","date_created":"2025-05-19T13:30:39Z"},{"article_number":"119763","language":[{"iso":"eng"}],"_id":"60081","department":[{"_id":"644"},{"_id":"9"},{"_id":"149"},{"_id":"321"}],"user_id":"15952","status":"public","publication":"Energy Conversion and Management","type":"journal_article","title":"Energy efficiency improvement for decarbonization in manufacturing industry: A review","doi":"10.1016/j.enconman.2025.119763","date_updated":"2025-06-06T07:49:35Z","publisher":"Elsevier BV","volume":338,"date_created":"2025-05-31T15:23:52Z","author":[{"first_name":"Marius","id":"94950","full_name":"Naumann, Marius","last_name":"Naumann"},{"first_name":"Moritz","id":"44763","full_name":"Ostermann, Moritz","last_name":"Ostermann","orcid":"https://orcid.org/0000-0003-1146-0443"},{"last_name":"Buchenau","full_name":"Buchenau, Nadja","first_name":"Nadja"},{"first_name":"Jannik","full_name":"Oetzel, Jannik","last_name":"Oetzel"},{"first_name":"Florian","id":"88614","full_name":"Schlosser, Florian","last_name":"Schlosser"},{"first_name":"Henning","orcid":"0000-0002-1538-089X","last_name":"Meschede","full_name":"Meschede, Henning","id":"86954"},{"first_name":"Thomas","full_name":"Tröster, Thomas","id":"553","last_name":"Tröster"}],"year":"2025","intvolume":"       338","citation":{"ama":"Naumann M, Ostermann M, Buchenau N, et al. Energy efficiency improvement for decarbonization in manufacturing industry: A review. <i>Energy Conversion and Management</i>. 2025;338. doi:<a href=\"https://doi.org/10.1016/j.enconman.2025.119763\">10.1016/j.enconman.2025.119763</a>","ieee":"M. Naumann <i>et al.</i>, “Energy efficiency improvement for decarbonization in manufacturing industry: A review,” <i>Energy Conversion and Management</i>, vol. 338, Art. no. 119763, 2025, doi: <a href=\"https://doi.org/10.1016/j.enconman.2025.119763\">10.1016/j.enconman.2025.119763</a>.","chicago":"Naumann, Marius, Moritz Ostermann, Nadja Buchenau, Jannik Oetzel, Florian Schlosser, Henning Meschede, and Thomas Tröster. “Energy Efficiency Improvement for Decarbonization in Manufacturing Industry: A Review.” <i>Energy Conversion and Management</i> 338 (2025). <a href=\"https://doi.org/10.1016/j.enconman.2025.119763\">https://doi.org/10.1016/j.enconman.2025.119763</a>.","short":"M. Naumann, M. Ostermann, N. Buchenau, J. Oetzel, F. Schlosser, H. Meschede, T. Tröster, Energy Conversion and Management 338 (2025).","mla":"Naumann, Marius, et al. “Energy Efficiency Improvement for Decarbonization in Manufacturing Industry: A Review.” <i>Energy Conversion and Management</i>, vol. 338, 119763, Elsevier BV, 2025, doi:<a href=\"https://doi.org/10.1016/j.enconman.2025.119763\">10.1016/j.enconman.2025.119763</a>.","bibtex":"@article{Naumann_Ostermann_Buchenau_Oetzel_Schlosser_Meschede_Tröster_2025, title={Energy efficiency improvement for decarbonization in manufacturing industry: A review}, volume={338}, DOI={<a href=\"https://doi.org/10.1016/j.enconman.2025.119763\">10.1016/j.enconman.2025.119763</a>}, number={119763}, journal={Energy Conversion and Management}, publisher={Elsevier BV}, author={Naumann, Marius and Ostermann, Moritz and Buchenau, Nadja and Oetzel, Jannik and Schlosser, Florian and Meschede, Henning and Tröster, Thomas}, year={2025} }","apa":"Naumann, M., Ostermann, M., Buchenau, N., Oetzel, J., Schlosser, F., Meschede, H., &#38; Tröster, T. (2025). Energy efficiency improvement for decarbonization in manufacturing industry: A review. <i>Energy Conversion and Management</i>, <i>338</i>, Article 119763. <a href=\"https://doi.org/10.1016/j.enconman.2025.119763\">https://doi.org/10.1016/j.enconman.2025.119763</a>"},"publication_identifier":{"issn":["0196-8904"]},"publication_status":"published"},{"page":"142–145","citation":{"mla":"Claes, Leander, et al. “Estimation of Third Order Elastic Constants of Piezoceramics Using DC Biased Impedance Measurements.” <i>2025 International Congress on Ultrasonics</i>, AMA Service GmbH, 2025, pp. 142–145, doi:<a href=\"https://doi.org/10.5162/ultrasonic2025/a18-a6\">10.5162/ultrasonic2025/a18-a6</a>.","bibtex":"@inproceedings{Claes_Hölscher_Friesen_Scheidemann_Hemsel_Henning_2025, place={Paderborn}, title={Estimation of third order elastic constants of piezoceramics using DC biased impedance measurements}, DOI={<a href=\"https://doi.org/10.5162/ultrasonic2025/a18-a6\">10.5162/ultrasonic2025/a18-a6</a>}, booktitle={2025 International Congress on Ultrasonics}, publisher={AMA Service GmbH}, author={Claes, Leander and Hölscher, Jonas and Friesen, Olga and Scheidemann, Claus and Hemsel, Tobias and Henning, Bernd}, year={2025}, pages={142–145} }","short":"L. Claes, J. Hölscher, O. Friesen, C. Scheidemann, T. Hemsel, B. Henning, in: 2025 International Congress on Ultrasonics, AMA Service GmbH, Paderborn, 2025, pp. 142–145.","apa":"Claes, L., Hölscher, J., Friesen, O., Scheidemann, C., Hemsel, T., &#38; Henning, B. (2025). Estimation of third order elastic constants of piezoceramics using DC biased impedance measurements. <i>2025 International Congress on Ultrasonics</i>, 142–145. <a href=\"https://doi.org/10.5162/ultrasonic2025/a18-a6\">https://doi.org/10.5162/ultrasonic2025/a18-a6</a>","ama":"Claes L, Hölscher J, Friesen O, Scheidemann C, Hemsel T, Henning B. Estimation of third order elastic constants of piezoceramics using DC biased impedance measurements. In: <i>2025 International Congress on Ultrasonics</i>. AMA Service GmbH; 2025:142–145. doi:<a href=\"https://doi.org/10.5162/ultrasonic2025/a18-a6\">10.5162/ultrasonic2025/a18-a6</a>","ieee":"L. Claes, J. Hölscher, O. Friesen, C. Scheidemann, T. Hemsel, and B. Henning, “Estimation of third order elastic constants of piezoceramics using DC biased impedance measurements,” in <i>2025 International Congress on Ultrasonics</i>, 2025, pp. 142–145, doi: <a href=\"https://doi.org/10.5162/ultrasonic2025/a18-a6\">10.5162/ultrasonic2025/a18-a6</a>.","chicago":"Claes, Leander, Jonas Hölscher, Olga Friesen, Claus Scheidemann, Tobias Hemsel, and Bernd Henning. “Estimation of Third Order Elastic Constants of Piezoceramics Using DC Biased Impedance Measurements.” In <i>2025 International Congress on Ultrasonics</i>, 142–145. Paderborn: AMA Service GmbH, 2025. <a href=\"https://doi.org/10.5162/ultrasonic2025/a18-a6\">https://doi.org/10.5162/ultrasonic2025/a18-a6</a>."},"year":"2025","place":"Paderborn","doi":"10.5162/ultrasonic2025/a18-a6","title":"Estimation of third order elastic constants of piezoceramics using DC biased impedance measurements","date_created":"2025-11-25T12:23:06Z","author":[{"first_name":"Leander","last_name":"Claes","orcid":"0000-0002-4393-268X","id":"11829","full_name":"Claes, Leander"},{"first_name":"Jonas","full_name":"Hölscher, Jonas","id":"73952","last_name":"Hölscher"},{"first_name":"Olga","id":"44026","full_name":"Friesen, Olga","last_name":"Friesen"},{"first_name":"Claus","last_name":"Scheidemann","full_name":"Scheidemann, Claus","id":"38259"},{"last_name":"Hemsel","full_name":"Hemsel, Tobias","id":"210","first_name":"Tobias"},{"first_name":"Bernd","last_name":"Henning","full_name":"Henning, Bernd","id":"213"}],"publisher":"AMA Service GmbH","date_updated":"2026-01-13T13:00:31Z","status":"public","publication":"2025 International Congress on Ultrasonics","type":"conference","language":[{"iso":"eng"}],"department":[{"_id":"49"}],"user_id":"11829","_id":"62300","project":[{"name":"FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken für Leistungsschallanwendungen (NEPTUN)","_id":"245"}]},{"year":"2025","place":"Paderborn","page":"126–129","citation":{"short":"C. Spieker, J. Förstner, J. Hölscher, L. Claes, B. 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ECER  European Conference on Educational Research, Belgrad."},"year":"2025","language":[{"iso":"eng"}],"department":[{"_id":"300"}],"user_id":"77633","_id":"64143","status":"public","type":"conference_abstract"},{"citation":{"chicago":"Ratnam, Tara, Gabriela Jonas-Ahrend, and Melissa Newberry. “The Presence of an Invisible College in the Knowledge Network of ISATT,” 2025.","ieee":"T. Ratnam, G. Jonas-Ahrend, and M. Newberry, “The presence of an Invisible College in the knowledge network of ISATT,” presented at the AERA American Educational Research Association, Denver/CO, USA, 2025.","ama":"Ratnam T, Jonas-Ahrend G, Newberry M. The presence of an Invisible College in the knowledge network of ISATT. In: ; 2025.","apa":"Ratnam, T., Jonas-Ahrend, G., &#38; Newberry, M. (2025). <i>The presence of an Invisible College in the knowledge network of ISATT</i>. AERA American Educational Research Association, Denver/CO, USA.","mla":"Ratnam, Tara, et al. <i>The Presence of an Invisible College in the Knowledge Network of ISATT</i>. 2025.","short":"T. Ratnam, G. Jonas-Ahrend, M. Newberry, in: 2025.","bibtex":"@inproceedings{Ratnam_Jonas-Ahrend_Newberry_2025, title={The presence of an Invisible College in the knowledge network of ISATT}, author={Ratnam, Tara and Jonas-Ahrend, Gabriela and Newberry, Melissa}, year={2025} }"},"year":"2025","conference":{"end_date":"2025-04-27","location":"Denver/CO, USA","name":"AERA American Educational Research Association","start_date":"2025-04-23"},"title":"The presence of an Invisible College in the knowledge network of ISATT","date_created":"2026-02-12T14:19:27Z","author":[{"first_name":"Tara","full_name":"Ratnam, Tara","last_name":"Ratnam"},{"first_name":"Gabriela","full_name":"Jonas-Ahrend, Gabriela","id":"77633","orcid":"0000-0003-3898-954X","last_name":"Jonas-Ahrend"},{"first_name":"Melissa","full_name":"Newberry, Melissa","last_name":"Newberry"}],"date_updated":"2026-02-12T14:28:56Z","status":"public","type":"conference_abstract","language":[{"iso":"eng"}],"department":[{"_id":"300"}],"user_id":"77633","_id":"64142"},{"language":[{"iso":"ger"}],"ddc":["370"],"publication":"Zukünfte technischer Bildung","file":[{"file_size":9953811,"file_id":"62273","access_level":"closed","file_name":"dgtb26.pdf","date_updated":"2025-11-21T08:30:09Z","creator":"maver001","date_created":"2025-11-21T08:30:09Z","success":1,"relation":"main_file","content_type":"application/pdf"}],"date_created":"2025-11-14T10:52:10Z","title":"„Und ich sag mal, Theorie und Praxis ist zweierlei“. Wie können Praxisphasen Lehramtsstudierende auf zukünftige Anforderungen vorbereiten? ","year":"2025","user_id":"76955","series_title":"Jahrestagungen der Deutschen Gesellschaft für Technische Bildung e.V. ","department":[{"_id":"300"}],"_id":"62188","file_date_updated":"2025-11-21T08:30:09Z","type":"book_chapter","status":"public","editor":[{"first_name":"Tobias","full_name":"Wiemer, Tobias","last_name":"Wiemer"},{"full_name":"Binder, Martin","last_name":"Binder","first_name":"Martin"},{"first_name":"Isabelle","last_name":"Penning","full_name":"Penning, Isabelle"}],"author":[{"orcid":"0000-0001-5175-357X","last_name":"Vernholz","id":"76955","full_name":"Vernholz, Mats","first_name":"Mats"},{"first_name":"Gabriela","orcid":"0000-0003-3898-954X","last_name":"Jonas-Ahrend","id":"77633","full_name":"Jonas-Ahrend, Gabriela"},{"first_name":"Katrin","last_name":"Temmen","id":"30086","full_name":"Temmen, Katrin"}],"volume":26,"oa":"1","date_updated":"2026-02-17T07:52:34Z","main_file_link":[{"open_access":"1"}],"conference":{"end_date":"2024-09-20","location":"Halle/Saale","name":"Deutsche Gesellschaft für Technische Bildung (DGTB)","start_date":"2024-09-18"},"doi":"https://doi.org/10.25932/publishup-67926","publication_status":"published","has_accepted_license":"1","citation":{"apa":"Vernholz, M., Jonas-Ahrend, G., &#38; Temmen, K. (2025). „Und ich sag mal, Theorie und Praxis ist zweierlei“. Wie können Praxisphasen Lehramtsstudierende auf zukünftige Anforderungen vorbereiten? . In T. Wiemer, M. Binder, &#38; I. Penning (Eds.), <i>Zukünfte technischer Bildung</i> (Vol. 26). <a href=\"https://doi.org/10.25932/publishup-67926\">https://doi.org/10.25932/publishup-67926</a>","mla":"Vernholz, Mats, et al. “„Und ich sag mal, Theorie und Praxis ist zweierlei“. Wie können Praxisphasen Lehramtsstudierende auf zukünftige Anforderungen vorbereiten? .” <i>Zukünfte technischer Bildung</i>, edited by Tobias Wiemer et al., vol. 26, 2025, doi:<a href=\"https://doi.org/10.25932/publishup-67926\">https://doi.org/10.25932/publishup-67926</a>.","short":"M. Vernholz, G. Jonas-Ahrend, K. Temmen, in: T. Wiemer, M. Binder, I. Penning (Eds.), Zukünfte technischer Bildung, Universitätsverlag Potsdam, 2025.","bibtex":"@inbook{Vernholz_Jonas-Ahrend_Temmen_2025, place={Universitätsverlag Potsdam}, series={Jahrestagungen der Deutschen Gesellschaft für Technische Bildung e.V. }, title={„Und ich sag mal, Theorie und Praxis ist zweierlei“. Wie können Praxisphasen Lehramtsstudierende auf zukünftige Anforderungen vorbereiten? }, volume={26}, DOI={<a href=\"https://doi.org/10.25932/publishup-67926\">https://doi.org/10.25932/publishup-67926</a>}, booktitle={Zukünfte technischer Bildung}, author={Vernholz, Mats and Jonas-Ahrend, Gabriela and Temmen, Katrin}, editor={Wiemer, Tobias and Binder, Martin and Penning, Isabelle}, year={2025}, collection={Jahrestagungen der Deutschen Gesellschaft für Technische Bildung e.V. } }","chicago":"Vernholz, Mats, Gabriela Jonas-Ahrend, and Katrin Temmen. “„Und ich sag mal, Theorie und Praxis ist zweierlei“. Wie können Praxisphasen Lehramtsstudierende auf zukünftige Anforderungen vorbereiten? .” In <i>Zukünfte technischer Bildung</i>, edited by Tobias Wiemer, Martin Binder, and Isabelle Penning, Vol. 26. Jahrestagungen der Deutschen Gesellschaft für Technische Bildung e.V. . Universitätsverlag Potsdam, 2025. <a href=\"https://doi.org/10.25932/publishup-67926\">https://doi.org/10.25932/publishup-67926</a>.","ieee":"M. Vernholz, G. Jonas-Ahrend, and K. Temmen, “„Und ich sag mal, Theorie und Praxis ist zweierlei“. Wie können Praxisphasen Lehramtsstudierende auf zukünftige Anforderungen vorbereiten? ,” in <i>Zukünfte technischer Bildung</i>, vol. 26, T. Wiemer, M. Binder, and I. Penning, Eds. Universitätsverlag Potsdam, 2025.","ama":"Vernholz M, Jonas-Ahrend G, Temmen K. „Und ich sag mal, Theorie und Praxis ist zweierlei“. Wie können Praxisphasen Lehramtsstudierende auf zukünftige Anforderungen vorbereiten? . In: Wiemer T, Binder M, Penning I, eds. <i>Zukünfte technischer Bildung</i>. Vol 26. Jahrestagungen der Deutschen Gesellschaft für Technische Bildung e.V. . ; 2025. doi:<a href=\"https://doi.org/10.25932/publishup-67926\">https://doi.org/10.25932/publishup-67926</a>"},"intvolume":"        26","place":"Universitätsverlag Potsdam"},{"citation":{"ama":"Ledentsov NN, Ledentsov N, Shchukin VA, et al. VCSELs: Influence of Design on Performance and Data Transmission over Multi-Mode and Single-Mode Fibers. <i>Photonics</i>. 2025;12(10). doi:<a href=\"https://doi.org/10.3390/photonics12101037\">10.3390/photonics12101037</a>","ieee":"N. N. Ledentsov <i>et al.</i>, “VCSELs: Influence of Design on Performance and Data Transmission over Multi-Mode and Single-Mode Fibers,” <i>Photonics</i>, vol. 12, no. 10, Art. no. 1037, 2025, doi: <a href=\"https://doi.org/10.3390/photonics12101037\">10.3390/photonics12101037</a>.","chicago":"Ledentsov, Nikolay N., Nikolay Ledentsov, Vitaly A. Shchukin, Alexander N. Ledentsov, Oleg Yu. Makarov, Ilya E. Titkov, Markus Lindemann, et al. “VCSELs: Influence of Design on Performance and Data Transmission over Multi-Mode and Single-Mode Fibers.” <i>Photonics</i> 12, no. 10 (2025). <a href=\"https://doi.org/10.3390/photonics12101037\">https://doi.org/10.3390/photonics12101037</a>.","apa":"Ledentsov, N. N., Ledentsov, N., Shchukin, V. A., Ledentsov, A. N., Makarov, O. Yu., Titkov, I. E., Lindemann, M., de Adelsburg Ettmayer, T., Gerhardt, N. C., Hofmann, M. R., Chen, X., Hurley, J. E., Dong, H., &#38; Li, M.-J. (2025). VCSELs: Influence of Design on Performance and Data Transmission over Multi-Mode and Single-Mode Fibers. <i>Photonics</i>, <i>12</i>(10), Article 1037. <a href=\"https://doi.org/10.3390/photonics12101037\">https://doi.org/10.3390/photonics12101037</a>","bibtex":"@article{Ledentsov_Ledentsov_Shchukin_Ledentsov_Makarov_Titkov_Lindemann_de Adelsburg Ettmayer_Gerhardt_Hofmann_et al._2025, title={VCSELs: Influence of Design on Performance and Data Transmission over Multi-Mode and Single-Mode Fibers}, volume={12}, DOI={<a href=\"https://doi.org/10.3390/photonics12101037\">10.3390/photonics12101037</a>}, number={101037}, journal={Photonics}, publisher={MDPI AG}, author={Ledentsov, Nikolay N. and Ledentsov, Nikolay and Shchukin, Vitaly A. and Ledentsov, Alexander N. and Makarov, Oleg Yu. and Titkov, Ilya E. and Lindemann, Markus and de Adelsburg Ettmayer, Thomas and Gerhardt, Nils Christopher and Hofmann, Martin R. and et al.}, year={2025} }","mla":"Ledentsov, Nikolay N., et al. “VCSELs: Influence of Design on Performance and Data Transmission over Multi-Mode and Single-Mode Fibers.” <i>Photonics</i>, vol. 12, no. 10, 1037, MDPI AG, 2025, doi:<a href=\"https://doi.org/10.3390/photonics12101037\">10.3390/photonics12101037</a>.","short":"N.N. Ledentsov, N. Ledentsov, V.A. Shchukin, A.N. Ledentsov, O.Yu. Makarov, I.E. Titkov, M. Lindemann, T. de Adelsburg Ettmayer, N.C. Gerhardt, M.R. Hofmann, X. Chen, J.E. Hurley, H. Dong, M.-J. Li, Photonics 12 (2025)."},"intvolume":"        12","publication_status":"published","publication_identifier":{"issn":["2304-6732"]},"doi":"10.3390/photonics12101037","author":[{"full_name":"Ledentsov, Nikolay N.","last_name":"Ledentsov","first_name":"Nikolay N."},{"full_name":"Ledentsov, Nikolay","last_name":"Ledentsov","first_name":"Nikolay"},{"first_name":"Vitaly A.","last_name":"Shchukin","full_name":"Shchukin, Vitaly A."},{"full_name":"Ledentsov, Alexander N.","last_name":"Ledentsov","first_name":"Alexander N."},{"first_name":"Oleg Yu.","last_name":"Makarov","full_name":"Makarov, Oleg Yu."},{"last_name":"Titkov","full_name":"Titkov, Ilya E.","first_name":"Ilya E."},{"first_name":"Markus","full_name":"Lindemann, Markus","last_name":"Lindemann"},{"first_name":"Thomas","full_name":"de Adelsburg Ettmayer, Thomas","last_name":"de Adelsburg Ettmayer"},{"first_name":"Nils Christopher","orcid":"0009-0002-5538-231X","last_name":"Gerhardt","full_name":"Gerhardt, Nils Christopher","id":"115298"},{"first_name":"Martin R.","last_name":"Hofmann","full_name":"Hofmann, Martin R."},{"first_name":"Xin","full_name":"Chen, Xin","last_name":"Chen"},{"full_name":"Hurley, Jason E.","last_name":"Hurley","first_name":"Jason E."},{"first_name":"Hao","last_name":"Dong","full_name":"Dong, Hao"},{"first_name":"Ming-Jun","last_name":"Li","full_name":"Li, Ming-Jun"}],"volume":12,"date_updated":"2026-02-19T12:39:12Z","status":"public","type":"journal_article","article_number":"1037","user_id":"15911","department":[{"_id":"977"}],"_id":"61932","year":"2025","issue":"10","title":"VCSELs: Influence of Design on Performance and Data Transmission over Multi-Mode and Single-Mode Fibers","date_created":"2025-10-23T10:59:59Z","publisher":"MDPI AG","abstract":[{"lang":"eng","text":"<jats:p>Substantial improvements in the performance of optical interconnects based on multi-mode fibers are required to support emerging single-channel data transmission rates of 200 Gb/s and 400 Gb/s. Future optical components must combine very high modulation bandwidths—supporting signaling at 100 Gbaud and 200 Gbaud—with reduced spectral width to mitigate chromatic-dispersion-induced pulse broadening and increased brightness to further restrict flux-confining area in multi-mode fibers and thereby increase the effective modal bandwidth (EMB). A particularly promising route to improved performance within standard oxide-confined VCSEL technology is the introduction of multiple isolated or optically coupled oxide-confined apertures, which we refer to collectively as multi-aperture (MA) VCSEL arrays. We show that properly designed MA VCSELs exhibit narrow emission spectra, narrow far-field profiles and extended intrinsic modulation bandwidths, enabling longer-reach data transmission over both multi-mode (MMF) and single-mode fibers (SMF). One approach uses optically isolated apertures with lateral dimensions of approximately 2–3 µm arranged with a pitch of 10–12 µm or less. Such devices demonstrate relaxation oscillation frequencies of around 30 GHz in continuous-wave operation and intrinsic modulation bandwidths approaching 50 GHz. Compared with a conventional single-aperture VCSELs of equivalent oxide-confined area, MA designs can reduce the spectral width (root mean square values &lt; 0.15 nm), lower series resistance (≈50 Ω) and limit junction overheating through more efficient multi-spot heat dissipation at the same total current. As each aperture lases in a single transverse mode, these devices exhibit narrow far-field patterns. In combination with well-defined spacing between emitting spots, they permit tailored restricted launch conditions in MMFs, enhancing effective modal bandwidth. In another MA approach, the apertures are optically coupled such that self-injection locking (SIL) leads to lasing in a single supermode. One may regard one of the supermodes as acting as a master mode controlling the other one. Streak-camera studies reveal post-pulse oscillations in the SIL regime at frequencies up to 100 GHz. MA VCSELs enable a favorable combination of wavelength chirp and chromatic dispersion, extending transmission distances over MMFs beyond those expected for zero-chirp sources and supporting transfer bandwidths up to 60 GHz over kilometer-length SMF links.</jats:p>"}],"publication":"Photonics","language":[{"iso":"eng"}]},{"citation":{"ama":"Diiankova U, Drong M, Pusch T, et al. Multimode vertical-cavity surface-emitting lasers under spin injection. <i>APL Photonics</i>. 2025;10(10). doi:<a href=\"https://doi.org/10.1063/5.0286998\">10.1063/5.0286998</a>","chicago":"Diiankova, Uliana, Mariusz Drong, Tobias Pusch, Rainer Michalzik, Markus Lindemann, Nils Christopher Gerhardt, and Martin R. Hofmann. “Multimode Vertical-Cavity Surface-Emitting Lasers under Spin Injection.” <i>APL Photonics</i> 10, no. 10 (2025). <a href=\"https://doi.org/10.1063/5.0286998\">https://doi.org/10.1063/5.0286998</a>.","ieee":"U. Diiankova <i>et al.</i>, “Multimode vertical-cavity surface-emitting lasers under spin injection,” <i>APL Photonics</i>, vol. 10, no. 10, Art. no. 106120, 2025, doi: <a href=\"https://doi.org/10.1063/5.0286998\">10.1063/5.0286998</a>.","apa":"Diiankova, U., Drong, M., Pusch, T., Michalzik, R., Lindemann, M., Gerhardt, N. C., &#38; Hofmann, M. R. (2025). Multimode vertical-cavity surface-emitting lasers under spin injection. <i>APL Photonics</i>, <i>10</i>(10), Article 106120. <a href=\"https://doi.org/10.1063/5.0286998\">https://doi.org/10.1063/5.0286998</a>","short":"U. Diiankova, M. Drong, T. Pusch, R. Michalzik, M. Lindemann, N.C. Gerhardt, M.R. Hofmann, APL Photonics 10 (2025).","bibtex":"@article{Diiankova_Drong_Pusch_Michalzik_Lindemann_Gerhardt_Hofmann_2025, title={Multimode vertical-cavity surface-emitting lasers under spin injection}, volume={10}, DOI={<a href=\"https://doi.org/10.1063/5.0286998\">10.1063/5.0286998</a>}, number={10106120}, journal={APL Photonics}, publisher={AIP Publishing}, author={Diiankova, Uliana and Drong, Mariusz and Pusch, Tobias and Michalzik, Rainer and Lindemann, Markus and Gerhardt, Nils Christopher and Hofmann, Martin R.}, year={2025} }","mla":"Diiankova, Uliana, et al. “Multimode Vertical-Cavity Surface-Emitting Lasers under Spin Injection.” <i>APL Photonics</i>, vol. 10, no. 10, 106120, AIP Publishing, 2025, doi:<a href=\"https://doi.org/10.1063/5.0286998\">10.1063/5.0286998</a>."},"intvolume":"        10","year":"2025","issue":"10","publication_status":"published","publication_identifier":{"issn":["2378-0967"]},"doi":"10.1063/5.0286998","title":"Multimode vertical-cavity surface-emitting lasers under spin injection","date_created":"2025-10-23T10:52:59Z","author":[{"last_name":"Diiankova","full_name":"Diiankova, Uliana","first_name":"Uliana"},{"first_name":"Mariusz","full_name":"Drong, Mariusz","last_name":"Drong"},{"first_name":"Tobias","last_name":"Pusch","full_name":"Pusch, Tobias"},{"last_name":"Michalzik","full_name":"Michalzik, Rainer","first_name":"Rainer"},{"full_name":"Lindemann, Markus","last_name":"Lindemann","first_name":"Markus"},{"first_name":"Nils Christopher","orcid":"0009-0002-5538-231X","last_name":"Gerhardt","full_name":"Gerhardt, Nils Christopher","id":"115298"},{"last_name":"Hofmann","full_name":"Hofmann, Martin R.","first_name":"Martin R."}],"volume":10,"publisher":"AIP Publishing","date_updated":"2026-02-19T12:39:00Z","status":"public","abstract":[{"text":"<jats:p>Recent research revealed that single-mode vertical-cavity surface-emitting lasers under spin injection (spin-VCSELs) have the potential to revolutionize laser technology for short-haul optical communications. While previous studies have focused solely on single-mode operation, this study introduces multimode spin-VCSELs. We experimentally demonstrate the existence of multi-resonant polarization dynamics when spin is injected, a phenomenon previously unobserved. The development opens the door to significantly faster and more efficient optical communication systems by harnessing the collective behavior of multiple laser modes. Furthermore, we lay the groundwork for understanding multimode operation through the extension of the single-mode spin–flip model, which forms the basis for present and future analyses of multimode spin-laser operation. This work is an important step toward realizing the full potential of spin-VCSELs and, thus, enables significantly improved performance of spin-VCSEL-based optical networks in the future.</jats:p>","lang":"eng"}],"type":"journal_article","publication":"APL Photonics","language":[{"iso":"eng"}],"article_number":"106120","user_id":"15911","department":[{"_id":"977"}],"_id":"61931"},{"publication":"Journal of Applied Physics","type":"journal_article","status":"public","abstract":[{"lang":"eng","text":"<jats:p>Laterally coupled vertical-cavity surface-emitting lasers (VCSELs) can exhibit additional resonances at high modulation frequencies that can substantially increase the laser’s modulation bandwidth. State-of-the-art laterally coupled devices require non-standard manufacturing technology and precise tuning of the currents supplied to each cavity separately to form optical supermodes suitable for such resonances. Here, we report on a novel switching phenomenon in laterally coupled VCSEL structures having only a single common electric contact and manufactured in a standard oxide-confined VCSEL geometry. At lower currents, they can be operated in a weakly coupled (WCR) regime and, at higher currents, in an injection-locked (IL) regime, enabling fundamentally different spectral and dynamic features. In the WCR, both optical supermodes lase and a narrow tunable plasma-assisted peak at their beating frequency is observed for each of the apertures, with a current-dependent frequency tuning and anti-phase intensity oscillations in each of the cavities. In contrast, in the IL regimes, only one (anti-symmetric) supermode lases. This adds a broader resonance to the modulation response while the intensity oscillations in both cavities are in-phase. Only the IL regime can result in increased modulation bandwidth of the system. Measurements of the pulse responses and continuous modulation up to 70 GHz for both operational regimes are presented and compared with simulations of our distributed rate equation model whose parameters are extracted from full-wave electromagnetic simulations of the device, including the temperature distribution in the device. Excellent agreement is found and enables comprehensive understanding of the dynamics of supermodes in oxide-confined coupled cavity VCSELs.</jats:p>"}],"department":[{"_id":"977"}],"user_id":"15911","_id":"64551","language":[{"iso":"eng"}],"article_number":"053102","issue":"5","publication_identifier":{"issn":["0021-8979","1089-7550"]},"publication_status":"published","intvolume":"       138","citation":{"apa":"Lindemann, M., D’Alessandro, M., Ledentsov, N., Makarov, O. Y., Ledentsov, N. N., Tibaldi, A., Gerhardt, N. C., &#38; Hofmann, M. R. (2025). Laterally coupled vertical-cavity surface-emitting lasers with                    tunable resonance width and frequency. <i>Journal of Applied Physics</i>, <i>138</i>(5), Article 053102. <a href=\"https://doi.org/10.1063/5.0275622\">https://doi.org/10.1063/5.0275622</a>","short":"M. Lindemann, M. D’Alessandro, N. Ledentsov, O.Y. Makarov, N.N. Ledentsov, A. Tibaldi, N.C. Gerhardt, M.R. Hofmann, Journal of Applied Physics 138 (2025).","bibtex":"@article{Lindemann_D’Alessandro_Ledentsov_Makarov_Ledentsov_Tibaldi_Gerhardt_Hofmann_2025, title={Laterally coupled vertical-cavity surface-emitting lasers with                    tunable resonance width and frequency}, volume={138}, DOI={<a href=\"https://doi.org/10.1063/5.0275622\">10.1063/5.0275622</a>}, number={5053102}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Lindemann, M. and D’Alessandro, M. and Ledentsov, N. and Makarov, O. Y. and Ledentsov, N. N. and Tibaldi, A. and Gerhardt, Nils Christopher and Hofmann, M. R.}, year={2025} }","mla":"Lindemann, M., et al. “Laterally Coupled Vertical-Cavity Surface-Emitting Lasers with                    Tunable Resonance Width and Frequency.” <i>Journal of Applied Physics</i>, vol. 138, no. 5, 053102, AIP Publishing, 2025, doi:<a href=\"https://doi.org/10.1063/5.0275622\">10.1063/5.0275622</a>.","ama":"Lindemann M, D’Alessandro M, Ledentsov N, et al. Laterally coupled vertical-cavity surface-emitting lasers with                    tunable resonance width and frequency. <i>Journal of Applied Physics</i>. 2025;138(5). doi:<a href=\"https://doi.org/10.1063/5.0275622\">10.1063/5.0275622</a>","chicago":"Lindemann, M., M. D’Alessandro, N. Ledentsov, O. Y. Makarov, N. N. Ledentsov, A. Tibaldi, Nils Christopher Gerhardt, and M. R. Hofmann. “Laterally Coupled Vertical-Cavity Surface-Emitting Lasers with                    Tunable Resonance Width and Frequency.” <i>Journal of Applied Physics</i> 138, no. 5 (2025). <a href=\"https://doi.org/10.1063/5.0275622\">https://doi.org/10.1063/5.0275622</a>.","ieee":"M. Lindemann <i>et al.</i>, “Laterally coupled vertical-cavity surface-emitting lasers with                    tunable resonance width and frequency,” <i>Journal of Applied Physics</i>, vol. 138, no. 5, Art. no. 053102, 2025, doi: <a href=\"https://doi.org/10.1063/5.0275622\">10.1063/5.0275622</a>."},"year":"2025","volume":138,"author":[{"first_name":"M.","last_name":"Lindemann","full_name":"Lindemann, M."},{"first_name":"M.","last_name":"D’Alessandro","full_name":"D’Alessandro, M."},{"full_name":"Ledentsov, N.","last_name":"Ledentsov","first_name":"N."},{"full_name":"Makarov, O. Y.","last_name":"Makarov","first_name":"O. Y."},{"first_name":"N. N.","full_name":"Ledentsov, N. N.","last_name":"Ledentsov"},{"last_name":"Tibaldi","full_name":"Tibaldi, A.","first_name":"A."},{"orcid":"0009-0002-5538-231X","last_name":"Gerhardt","id":"115298","full_name":"Gerhardt, Nils Christopher","first_name":"Nils Christopher"},{"first_name":"M. R.","last_name":"Hofmann","full_name":"Hofmann, M. 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