@inbook{65518,
  abstract     = {{<jats:title>Abstract</jats:title>
                  <jats:p>Optically assisted digital-to-analog converters (DACs) using Nyquist pulse sequences (NPSs) are presented and investigated. Therefore, NPSs are mathematically described and analyzed. Based on this, the operating principle of a precise optical Nyquist pulse synthesizer digital-to-analog converter (PONyDAC) is described. Possible architectures of PONyDAC are derived and compared in terms of performance and practicability. Moreover, the limits of PONyDAC systems and their superiority over classical electronic DACs are discussed. Furthermore, discrete building-block based implementations and monolithic implementations in electronic-photonic integrated circuits (EPICs) are presented. To enable a practicable monolithic integration, a shrinkage of the Mach-Zehnder modulators (MZMs) has been performed by applying forward-biased phase shifters (FB-PSs). These FB-PSs are analyzed and modeled to allow the precise and reliable design of PONyDAC systems with multiple MZMs. Finally, data conversion and data transmission experiments are carried out to demonstrate the systems functionality, quantify its performance, and prove their superiority over purely electronic DACs.</jats:p>}},
  author       = {{Scheytt, J. Christoph and Schwabe, Tobias and Singh, Karanveer and Kress, Christian and Schneider, Thomas}},
  booktitle    = {{Electronic-Photonic Integrated Systems for Ultrafast Signal Processing}},
  editor       = {{Scheytt, J. Christoph and Kress, Christian and Berroth, Manfred and Pachnicke, Stephan and Witzens, Jeremy}},
  isbn         = {{9783032083395}},
  publisher    = {{Springer Nature Switzerland}},
  title        = {{{Precise Optical Nyquist Pulse Synthesizer Digital-to-Analog Converter}}},
  doi          = {{10.1007/978-3-032-08340-1_4}},
  year         = {{2026}},
}

@book{65256,
  editor       = {{Scheytt, J. Christoph and Kress, Christian and Berroth, Manfred and Pachnicke, Stephan and Witzens, Jeremy}},
  isbn         = {{9783032083395}},
  publisher    = {{Springer Nature Switzerland}},
  title        = {{{Electronic-Photonic Integrated Systems for Ultrafast Signal Processing}}},
  doi          = {{10.1007/978-3-032-08340-1}},
  year         = {{2026}},
}

@inbook{65521,
  abstract     = {{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.}},
  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 Scheytt, J. Christoph}},
  booktitle    = {{Electronic-Photonic Integrated Systems for Ultrafast Signal Processing}},
  editor       = {{Scheytt, J. Christoph and Kress, Christian and Berroth, Manfred and Pachnicke, Stephan and Witzens, Jeremy}},
  isbn         = {{9783032083395}},
  publisher    = {{Springer Nature Switzerland}},
  title        = {{{Ultra-Broadband Photonically Assisted Analog-to-Digital-Converters}}},
  doi          = {{10.1007/978-3-032-08340-1_3}},
  year         = {{2026}},
}