Monolithically integrated 112 Gbps PAM4 optical transmitter and receiver in a 45nm CMOS-silicon photonics process Article Swipe

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Thomas Baehr-Jones , Shahab Ardalan , Matthew P. Chang , Saman Jafarlou , Xavier Serey , G. Zarris , Gabriel Thompson , Artsroun Darbinian , Brian R. West , Babak Behnia , Vesselin Velev , Yun Zhe Li , Katherine E. Roelofs , Wuchun Wu , Jim Mali , Jiahao Zhan , Noam Ophir , Chris Horng , Romanas Narevich , Fen Guan , Jinghui Yang , Hao Wu , Patrick Maupin , Rhys Manley , Yogi Ahuja , Ari Novack , Lei Wang , Matthew Streshinsky ·

YOU? · · 2023 · Open Access · · DOI: https://doi.org/10.1364/opticaopen.22814837 · OA: W4378220378

We demonstrate a transmitter and receiver in a silicon photonics platform for O-band optical communication that monolithically incorporates a modulator driver, traveling-wave Mach-Zehnder modulator, control circuitry, photodetector, and TIA in the GlobalFoundries Fotonix™ (45SPCLO) platform. The transmitter and receiver show an open 112 Gbps PAM4 eye at a 4.3 pJ/bit energy efficiency, not including the laser. Extensive use of gain-peaking enables our modulator driver and TIA to achieve the high bandwidths needed in the 45 nm CMOS-silicon photonics process. Our results suggest an alternative to the frequent approach of bump-bonding BiCMOS drivers and TIAs to silicon photonics.