Presentation
9 March 2024 Experimental investigation of DSP complexity of low-power beyond-300G IM-DD short-reach links
Author Affiliations +
Abstract
Future short-reach optical fiber communication links for datacenter and optical access applications would require not only high data rate but also low power/complexity. In this work, by leveraging a home-designed LiNbO3 intensity modulator with high slope-efficiency, we experimentally investigate a low-complexity/power optical pulse amplitude modulation (PAM) link with 300Gb/s data rate excluding FEC overhead and the following detailed merits: (1) at the transmitter side, no digital signal processing or a high-resolution wideband DAC is required, while only CMOS-class driving voltages less than 1 volt is needed; (2) at the receiver side, no optical or electrical amplifier is needed. It is found that for C-band 600m transmission, a symbol-spaced decision-feedback equalizer (DFE) with 91 feedforward taps and 1 feedback taps is sufficient to achieve a BER lower than the threshold of a low-power practical FEC. With these features, we expect that the overall system has low power consumption. A bitrate-distance product of >180Gb/s*km in C-band is achieved experimentally.
Conference Presentation
© (2024) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Paikun Zhu, Yuya Yamaguchi, Yuki Yoshida, Tien Dat Pham, Masayuki Motoya, Shingo Takano, Ryo Shimizu, Kouichi Akahane, and Ken-ichi Kitayama "Experimental investigation of DSP complexity of low-power beyond-300G IM-DD short-reach links", Proc. SPIE PC12894, Next-Generation Optical Communication: Components, Sub-Systems, and Systems XIII, PC1289402 (9 March 2024); https://doi.org/10.1117/12.2692260
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KEYWORDS
Digital signal processing

Forward error correction

Radio optics

Receivers

Transmitters

Modulation

Optical transmission

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