Energy efficient transmitters for high bandwidth density links

Sudharsanan Srinivasan; Di Liang; Geza Kurcveil; Yingtao Hu; Antoine Descos; Bassem Tossoun; Yuan Yuan; Zhihong Huang; Raymond Beausoleil

doi:10.1117/12.2614086

5 March 2022 Energy efficient transmitters for high bandwidth density links

Sudharsanan Srinivasan, Di Liang, Geza Kurcveil, Yingtao Hu, Antoine Descos, Bassem Tossoun, Yuan Yuan, Zhihong Huang, Raymond Beausoleil

Author Affiliations +

Proceedings Volume 12007, Optical Interconnects XXII; 120070I (2022) https://doi.org/10.1117/12.2614086
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

Increasing the throughput of a transmitter by scaling out to multiple wavelengths in high bandwidth density links, such as those found in data centers or high performance compute clusters, is beginning to gain traction for two reasons. First, increasing the data rate per wavelength by both increasing the baud rate (>50G) and by increasing the number of bits per symbol (PAM-4) consumes more power and increases latency, from having to use a powerful FEC. Second, a technological advantage, in achieving tight integration of lasers with silicon based photonics, has reduced laser coupling losses and tighter control on laser wavelengths, which in turn allows for greater utilization of the available optical bandwidth. In this talk, we will review our current and past efforts in realizing multi-wavelength laser sources heterogeneously integrated on silicon as a means to generate fully integrated transmitters with bandwidth capacity in excess of 1Tbps over 40 channels. We will also discuss some of the recent results from our MOSCAP microring modulators and Si-Ge/ quantum dot based avalanche photodetectors that enable a fully integrated heater-free compact transceiver. The estimated power consumption for the optical components in such a transmitter is around 1pJ/bit, which is roughly a 10x reduction compared to the state-of-the-art.

Conference Presentation

Citation Download Citation

Sudharsanan Srinivasan, Di Liang, Geza Kurcveil, Yingtao Hu, Antoine Descos, Bassem Tossoun, Yuan Yuan, Zhihong Huang, and Raymond Beausoleil "Energy efficient transmitters for high bandwidth density links", Proc. SPIE 12007, Optical Interconnects XXII, 120070I (5 March 2022); https://doi.org/10.1117/12.2614086

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