56 Gbaud PAM4 real time optical Datacom link

John Pertessis; Shubhashish Datta; Abhay Joshi

doi:10.1117/12.2546767

27 February 2020 56 Gbaud PAM4 real time optical Datacom link

John Pertessis, Shubhashish Datta, Abhay Joshi

Proceedings Volume 11308, Metro and Data Center Optical Networks and Short-Reach Links III; 113080B (2020) https://doi.org/10.1117/12.2546767
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

We present a Forward Error Correction (FEC) - assisted, 56 Gbaud PAM4 optical link having error free performance with adequate link margin of better than 6 dB. The link was formed by driving a 1550 nm Externally Modulated Laser (EML) with a commercial PAM4 transceiver chip. The optical signal was transmitted over various link lengths of dispersion compensated fiber, fed to a low-noise Linear InGaAs Photoreceiver having Automatic Gain Control (AGC), and routed back to the PAM4 transceiver chip with ADC & DSP capability. Real time bit error rate measurements demonstrate the advantage of employing linear receivers having AGC.

Citation Download Citation

John Pertessis, Shubhashish Datta, and Abhay Joshi "56 Gbaud PAM4 real time optical Datacom link", Proc. SPIE 11308, Metro and Data Center Optical Networks and Short-Reach Links III, 113080B (27 February 2020); https://doi.org/10.1117/12.2546767

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