As datacom link speeds approach 100 Gb/s per lane, higher complexity modulation formats such as PAM-4, PAM-8, and discrete multi-tone (DMT) have become favored by some despite their frequent need for forward-error correction (FEC) adding unnecessary latency. In this talk, we will describe a new optical-domain equalization scheme that leverages photonic integration to extend bandwidth without adding latency. We will describe our work using an IC-driven segmented electrode Mach Zehnder modulator that exploits this unique feed-forward equalization to generate 60-Gb/s on-off keyed (OOK) non-return-to-zero (NRZ) transmission with BER < 10-12. The approach can deliver high link bandwidths with ultra-low latencies.
Benjamin G. Lee, Nicolas Dupuis, Christian W. Baks, Douglas M. Gill, and William M. J. Green, "Leveraging photonic integration to enhance performance in datacom optical links," Proc. SPIE 10536, Smart Photonic and Optoelectronic Integrated Circuits XX, 1053615 (Presented at SPIE OPTO: January 31, 2018; Published: 22 February 2018); https://doi.org/10.1117/12.2292088.
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