Impact of semiconductor optical amplifier nonlinear gain over 16-QAM optical signals at 40 and 100 Gbit/s

Peterson Rocha; Cristiano M. Gallep; Evandro Conforti

doi:10.1117/1.OE.57.10.106112

30 October 2018 Impact of semiconductor optical amplifier nonlinear gain over 16-QAM optical signals at 40 and 100 Gbit/s

Peterson Rocha, Cristiano M. Gallep, Evandro Conforti

Author Affiliations +

Funded by: São Paulo Research Foundation (FAPESP), FAPESP, Foundation for Research Support of the State of São Paulo, Coordination for the Improvement of Higher Education Personnel, Ministry of Science, Technology and Innovation | Conselho Nacional de Desenvolvimento Científico e Tecnológico (National Council for Scientific and Technological Development)

Optical Engineering, Vol. 57, Issue 10, 106112 (October 2018). https://doi.org/10.1117/1.OE.57.10.106112

Abstract

Nonlinear phase-drift on 16-QAM optical signals due to semiconductor optical amplifier gain saturation were measured for two devices—a linear and a nonlinear one—considering the input optical power and the net optical gain. The signal when amplified by the nonlinear device is marred even for low P_in (−20 dBm), and for moderate input powers (−15 dBm) signal quality stays always above the forward error correction (FEC) limit (error vector magnitude = 16 % ). The nonlinear device as expected induced more degradation, being able to operate fairly just for small gain and input power; for moderate gain (12 dB), the amplified signals stay always above the FEC limit. The linear device showed fair operation even for moderate P_in = − 15 dBm, working under FEC limit for OSNR (at Rx) higher than 16.5 dB for 10 Gbaud, and higher than 20 dB for 25 Gbaud, with small penalties (<2 dB) in relation to the back-to-back configuration.

Citation Download Citation

Peterson Rocha, Cristiano M. Gallep, and Evandro Conforti "Impact of semiconductor optical amplifier nonlinear gain over 16-QAM optical signals at 40 and 100 Gbit/s," Optical Engineering 57(10), 106112 (30 October 2018). https://doi.org/10.1117/1.OE.57.10.106112

Received: 28 May 2018; Accepted: 10 October 2018; Published: 30 October 2018

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