Abstract

For next generation highly integrated transceivers, silicon photonics (SiP) has attracted widespread interest in using mature CMOS production processes to manufacture high-yield, low-cost photonic integrated circuits (PIC) with the potential for integration with CMOS electronics. SiP now routinely integrate GeSi electroabsorption modulators (EAM) and GeSi waveguide photodiodes which have high responsivity and possess 3-dB electro-optic bandwidth of over 65 GHz. Their ultra-compact dimensions make it possible for multi-channel transceivers to be realized on a small chip area. In this paper, we demonstrate the high-speed capability of these devices incorporated with optimized digital signal processing (DSP) for 100 Gbaud+ PAM-4 signaling. Using integrated GeSi-EAM and GeSi-photodiode fabricated at a commercial foundry, we carried out intensity modulation and direct detection (IM-DD) transmission experiments in C-band using PAM-4, for both back-to-back and SSMF transmission at 1 km and 1.5 km. Under a 6-dB system bandwidth of ∼43GHz we attained, with the help of DSP equalization, a record 112 Gbaud (224 Gb/s), 108 Gbaud (216 Gb/s) and 100 Gbaud (200 Gb/s) are achieved over back-to-back, 1 km and 1.5 km SSMF transmission respectively, with a bit-error-rate (BER) below the hard-decision forward-error-correction (HD-FEC) threshold of 3.8E-3.

C-band 67 GHz silicon photonic microring modulator for dispersion-uncompensated 100 Gbaud PAM-4

David W. U Chan, Xiong Wu, Zunyue Zhang, Chao Lu, Alan Pak Tao Lau, and Hon Ki Tsang
Opt. Lett. 47(11) 2935-2938 (2022)

800  Gbit/s transmission over 1  km single-mode fiber using a four-channel silicon photonic transmitter

Hongguang Zhang, Miaofeng Li, Yuguang Zhang, Di Zhang, Qiwen Liao, Jian He, Shenglei Hu, Bo Zhang, Lei Wang, Xi Xiao, Nan Qi, and Shaohua Yu
Photon. Res. 8(11) 1776-1782 (2020)

200 Gb/s transmission using a dual-polarization O-Band silicon photonic intensity modulator for Stokes vector direct detection applications

Eslam El-Fiky, Mohamed Osman, Mohammed Sowailem, Alireza Samani, David Patel, Rui Li, Md. G. Saber, Yun Wang, Nicolas Abadia, Yannick D’Mello, and David V. Plant
Opt. Express 25(24) 30336-30348 (2017)

Optimization of PAM-4 transmitters based on lumped silicon photonic MZMs for high-speed short-reach optical links

Shiyu Zhou, Hsin-ta Wu, Khosrov Sadeghipour, Carmelo Scarcella, Cormac Eason, Marc Rensing, Mark J. Power, Cleitus Antony, Peter O’Brien, Paul D. Townsend, and Peter Ossieur
Opt. Express 25(4) 4312-4325 (2017)

Experimental study of 112 Gb/s short reach transmission employing PAM formats and SiP intensity modulator at 1.3 μm

Mathieu Chagnon, Mohamed Osman, Michel Poulin, Christine Latrasse, Jean-Frédéric Gagné, Yves Painchaud, Carl Paquet, Stéphane Lessard, and David Plant
Opt. Express 22(17) 21018-21036 (2014)