Open AccessTheoretical and experimental analysis of Inter-channel crosstalk between TWDM and fronthaul wavelengths due to stimulated Raman scattering
Author(s) -
Chang Ming Li,
Hao He,
Weisheng Hu
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.008809
Subject(s) - optics , wavelength division multiplexing , crosstalk , physics , wavelength , raman scattering , raman amplification , channel spacing , raman spectroscopy
In this paper, we analyze the stimulated Raman scattering (SRS) effect between multiple TWDM downstream wavelengths in L band and multiple fronthaul wavelength channels in C band theoretically, and investigate its impact on fronthaul signals experimentally for the first time. The impact includes two aspects, one is SRS-induced power depletion and the other is the eye diagram distortion caused by the nonlinear Raman crosstalk. Experimental results show that, up to 1-dB power depletion would be introduced to each fronthaul wavelength channel with the launch power per TWDM channel varying from 8-dBm to 15-dBm. In addition, due to the "1" level broadening of the non-return-to-zero on-off keying (NRZ-OOK) eye diagram, the receiving sensitivity with 20-km standard single mode fiber (SSMF) transmission is decreased by ~1-dB. Therefore, a total of ~2-dB power penalty would be imposed on fronthaul signals when co-transmitting with TWDM downstream signals in the same feeder fiber.