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, Hon Ki Tsang

Research output: Journal article publicationJournal articleAcademic researchpeer-review


A very-high-bandwidth integrated silicon microring modulator (MRM) designed on a commercial silicon photonics (SiP) platform for C-band operation is presented. TheMRM has a 3 dB electro-optic (EO) bandwidth of over 67 GHz and features a small footprint of 24 μm ×70 μm. Using the MRM, we demonstrate intensity modulation-direct detection (IM-DD) transmission with 4-level pulse amplitude modulation (PAM-4) signaling of over 100 Gbaud. By utilizing the optical peaking effect and negative chirp in the MRM, we extend the transmission distance, which is limited by the fiber-dispersion-induced frequency fading. Using a standard single-mode fiber (SSMF) for transmission across distances of up to 2 km, we measured the data transmission of 100 Gbaud PAM-4 signals with a bit error rate (BER) under the general 7% hard-decision forward-error correction (HD-FEC) threshold. The MRM enables an extended transmission distance for 100 Gbaud signaling in the C-band without dispersion compensation.

Original languageEnglish
Pages (from-to)2935-2938
Number of pages4
JournalOptics Letters
Issue number11
Publication statusPublished - 1 Jun 2022

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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