Precise Optical Nyquist Pulse Synthesizer Digital-to-Analog Converter Scheytt, J. Christoph Schwabe, Tobias Singh, Karanveer Kress, Christian Schneider, Thomas Scheytt, J. Christoph Kress, Christian Berroth, Manfred Pachnicke, Stephan Witzens, Jeremy <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> Springer Nature Switzerland 2026 info:eu-repo/semantics/bookPart doc-type:bookPart text http://purl.org/coar/resource_type/c_3248 https://ris.uni-paderborn.de/record/65518 Scheytt JC, Schwabe T, Singh K, Kress C, Schneider T. Precise Optical Nyquist Pulse Synthesizer Digital-to-Analog Converter. 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_4">10.1007/978-3-032-08340-1_4</a> eng info:eu-repo/semantics/altIdentifier/doi/10.1007/978-3-032-08340-1_4 info:eu-repo/semantics/altIdentifier/isbn/9783032083395 info:eu-repo/semantics/altIdentifier/isbn/9783032083401 info:eu-repo/semantics/closedAccess