book chapter published Jeremy Witzens author Daniel Drayss author Dengyang Fang author Alvaro Moscoso Mártir author Juliana Müller author Maxim Weizel author 442710000-0003-2699-9839 Andrea Zazzi author Wolfgang Freude author Christian Koos author Sebastian Randel author J. Christoph Scheytt author 371440000-0002-5950-6618 J. ChristophScheytt editor ChristianKress editor ManfredBerroth editor StephanPachnicke editor JeremyWitzens editor 58 department 623 department <jats:title>Abstract</jats:title> <jats:p>We present recent progress made towards ultra-broadband photonically assisted analog-to-digital converters, that leverage both the low jitter of best-of-class mode-locked lasers as well as the capability of optics to break down broadband signals into multiple lower speed tributaries that can be better handled by electronics. We review in particular our work on both time- and frequency-domain approaches and give an outlook on how these architectures can be extended to include further signal processing tasks such as equalization. Optically triggered track-and-hold amplifiers are reported with an equivalent jitter below 80 fs rms in a signal frequency range from 20 GHz to 70 GHz. Frequency-domain architectures implementing optical arbitrary waveform measurement up to signal bandwidths of 610 GHz are also shown. Finally, an architecture allowing the deserialization and equalization of PAM4 signals is introduced and modeled for operation in 400 Gb/s links.</jats:p> Springer Nature Switzerland2026 eng 9783032083395 978303208340110.1007/978-3-032-08340-1_3 J. Witzens <i>et al.</i>, “Ultra-Broadband Photonically Assisted Analog-to-Digital-Converters,” in <i>Electronic-Photonic Integrated Systems for Ultrafast Signal Processing</i>, J. C. Scheytt, C. Kress, M. Berroth, S. Pachnicke, and J. Witzens, Eds. Cham: Springer Nature Switzerland, 2026. Witzens, Jeremy, Daniel Drayss, Dengyang Fang, Alvaro Moscoso Mártir, Juliana Müller, Maxim Weizel, Andrea Zazzi, et al. “Ultra-Broadband Photonically Assisted Analog-to-Digital-Converters.” In <i>Electronic-Photonic Integrated Systems for Ultrafast Signal Processing</i>, edited by J. Christoph Scheytt, Christian Kress, Manfred Berroth, Stephan Pachnicke, and Jeremy Witzens. Cham: Springer Nature Switzerland, 2026. <a href="https://doi.org/10.1007/978-3-032-08340-1_3">https://doi.org/10.1007/978-3-032-08340-1_3</a>. Witzens J, Drayss D, Fang D, et al. Ultra-Broadband Photonically Assisted Analog-to-Digital-Converters. In: Scheytt JC, Kress C, Berroth M, Pachnicke S, Witzens J, eds. <i>Electronic-Photonic Integrated Systems for Ultrafast Signal Processing</i>. Springer Nature Switzerland; 2026. doi:<a href="https://doi.org/10.1007/978-3-032-08340-1_3">10.1007/978-3-032-08340-1_3</a> Witzens, J., Drayss, D., Fang, D., Moscoso Mártir, A., Müller, J., Weizel, M., Zazzi, A., Freude, W., Koos, C., Randel, S., &#38; Scheytt, J. C. (2026). Ultra-Broadband Photonically Assisted Analog-to-Digital-Converters. In J. C. Scheytt, C. Kress, M. Berroth, S. Pachnicke, &#38; J. Witzens (Eds.), <i>Electronic-Photonic Integrated Systems for Ultrafast Signal Processing</i>. Springer Nature Switzerland. <a href="https://doi.org/10.1007/978-3-032-08340-1_3">https://doi.org/10.1007/978-3-032-08340-1_3</a> J. Witzens, D. Drayss, D. Fang, A. Moscoso Mártir, J. Müller, M. Weizel, A. Zazzi, W. Freude, C. Koos, S. Randel, J.C. Scheytt, in: J.C. Scheytt, C. Kress, M. Berroth, S. Pachnicke, J. Witzens (Eds.), Electronic-Photonic Integrated Systems for Ultrafast Signal Processing, Springer Nature Switzerland, Cham, 2026. Witzens, Jeremy, et al. “Ultra-Broadband Photonically Assisted Analog-to-Digital-Converters.” <i>Electronic-Photonic Integrated Systems for Ultrafast Signal Processing</i>, edited by J. Christoph Scheytt et al., Springer Nature Switzerland, 2026, doi:<a href="https://doi.org/10.1007/978-3-032-08340-1_3">10.1007/978-3-032-08340-1_3</a>. @inbook{Witzens_Drayss_Fang_Moscoso Mártir_Müller_Weizel_Zazzi_Freude_Koos_Randel_et al._2026, place={Cham}, title={Ultra-Broadband Photonically Assisted Analog-to-Digital-Converters}, DOI={<a href="https://doi.org/10.1007/978-3-032-08340-1_3">10.1007/978-3-032-08340-1_3</a>}, booktitle={Electronic-Photonic Integrated Systems for Ultrafast Signal Processing}, publisher={Springer Nature Switzerland}, author={Witzens, Jeremy and Drayss, Daniel and Fang, Dengyang and Moscoso Mártir, Alvaro and Müller, Juliana and Weizel, Maxim and Zazzi, Andrea and Freude, Wolfgang and Koos, Christian and Randel, Sebastian and et al.}, editor={Scheytt, J. Christoph and Kress, Christian and Berroth, Manfred and Pachnicke, Stephan and Witzens, Jeremy}, year={2026} } 655212026-04-30T06:07:38Z2026-04-30T06:09:58Z