2nd-order forward-pumped distributed Raman amplification employing SOA-based incoherent light source in PDM-16QAM WDM transmission system

Takayuki Kobayashi; Masahito Morimoto; Haruki Ogoshi; Shigehiro Takasaka; Junji Yoshida; Yutaka Miyamoto

doi:10.1587/comex.2019XBL0012

2^nd-order forward-pumped distributed Raman amplification employing SOA-based incoherent light source in PDM-16QAM WDM transmission system

Takayuki Kobayashi, Masahito Morimoto, Haruki Ogoshi, Shigehiro Takasaka, Junji Yoshida, Yutaka Miyamoto

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Keywords: digital coherent transmission system, optical communication, forward-pumped Raman amplification

JOURNAL FREE ACCESS

2019 Volume 8 Issue 5 Pages 166-171

DOI https://doi.org/10.1587/comex.2019XBL0012

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Abstract

We demonstrate 2^nd-order forward-pumped distributed Raman amplification (DRA) in PDM-16QAM 25-GHz-spaced 11-channel WDM transmission system in L-band. Our forward-pumped DRA consists of semiconductor-optical-amplifier-based incoherent light source for signal amplification and two coherent light sources for incoherent light amplification. After 1,760 km single-mode-fiber transmission, 1.2-dB Q-improvement is experimentally achieved by our DRA scheme compared with that of in the case of amplification with EDFA only. And we also show the low RIN-transfer-induced Q-penalty of our pumping scheme at the Raman on/off gain of up to 10 dB.

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