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Optics Letters

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  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 10 — May. 15, 2014
  • pp: 2841–2844

Relative phase noise induced impairment in CO-OFDM optical communication system with distributed fiber Raman amplifier

Jiadi Wu, Jingchi Cheng, Ming Tang, Lei Deng, Fu Songnian, Perry Ping Shum, and Deming Liu  »View Author Affiliations


Optics Letters, Vol. 39, Issue 10, pp. 2841-2844 (2014)
http://dx.doi.org/10.1364/OL.39.002841


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Abstract

In this Letter, we demonstrate that the interplay between Raman pump relative intensity noise and cross-phase modulation leads to a relative phase noise (RPN) that brings non-negligible performance degradation to coherent optical orthogonal frequency-division multiplexing (CO-OFDM) transmission systems with co-pumped Raman amplification. By theoretical analysis and numerical simulation, we proved that RPN brings more system impairment in terms of Q-factor penalty than the single carrier system, and relatively larger walk-off between pump and signal helps to suppress the RPN induced impairment. A higher-order modulated signal is less tolerant to RPN than a lower-order signal. With the same spectral efficiency, the quadrature-amplitude modulation format shows better tolerance to RPN than phase-shift keying. The reported findings will be useful for the design and optimization of Raman amplified CO-OFDM multi-carrier transmission systems.

© 2014 Optical Society of America

OCIS Codes
(060.1660) Fiber optics and optical communications : Coherent communications
(230.4480) Optical devices : Optical amplifiers

ToC Category:
Optical Devices

History
Original Manuscript: January 24, 2014
Revised Manuscript: March 10, 2014
Manuscript Accepted: April 7, 2014
Published: May 5, 2014

Citation
Jiadi Wu, Jingchi Cheng, Ming Tang, Lei Deng, Fu Songnian, Perry Ping Shum, and Deming Liu, "Relative phase noise induced impairment in CO-OFDM optical communication system with distributed fiber Raman amplifier," Opt. Lett. 39, 2841-2844 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-10-2841


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