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Digital Compensation of Relative Phase Noise for DSCM Based Coherent Transmission System Using Forward Pumped Distributed Raman Amplification
Vedala, Govind Akasaka, Youichi Ikeuchi, Tadashi Hui, Rongqing
Vedala, Govind
Akasaka, Youichi
Ikeuchi, Tadashi
Hui, Rongqing
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Abstract
We experimentally demonstrate pilot aided compensation of relative phase noise
(RPN) in a distributed Raman amplified coherent fiber optic system with forward pumping.
This technique effectively eliminates the error floor that arises when conventional phase
noise compensation algorithms track RPN, especially in the context of higher order modulation
formats and low baud rate signals. Extrapolating the experimental results, we also
demonstrate through measurement and simulation, the effectiveness of pilot aided RPN
compensation in a 25 Gbaud, 16-QAM modulated digital-subcarrier system with 2.5 Gbaud
and 5 Gbaud subcarriers.
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Date
2018-12-12
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Publisher
IEEE
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Keywords
Phase Noise, Modulation, Laser excitation, stimulated emission, optical fiber amplifiers, forward pumping, distributed Raman amplifier, Nyquist subcarrier, DSCM, relative phase noise, DSP
Citation
G. Vedala, Y. Akasaka, T. Ikeuchi and R. Hui, "Digital Compensation of Relative Phase Noise for DSCM Based Coherent Transmission System Using Forward Pumped Distributed Raman Amplification," in IEEE Photonics Journal, vol. 11, no. 1, pp. 1-9, Feb. 2019, Art no. 7200509.
doi: 10.1109/JPHOT.2018.2886462