Rigorous analysis of noise evolution in nonlinear dispersive optical fiber

Zhi Jiang; Qian Yu; Chongcheng Fan

doi:10.1117/12.445050

17 October 2001 Rigorous analysis of noise evolution in nonlinear dispersive optical fiber

Zhi Jiang, Qian Yu, Chongcheng Fan

Proceedings Volume 4581, Passive Components and Transmission Systems; (2001) https://doi.org/10.1117/12.445050
Event: Asia-Pacific Optical and Wireless Communications Conference and Exhibit, 2001, Beijing, China

Abstract

Based on the weak intensity/phase modulation transfer matrix H, a matrix V for intensity noise (IN) and phase noise (PN) evolution along nonlinear, dispersive and lossy fiber is derived, while matrix description makes it especially useful in noise evolution analysis in systems with chained optical amplifiers. Evolution of two noise sources, laser phase noise and ASE of EDFA, is examined in detail through V. IN, PN and optical field noise spectral densities are studied uniformly. Correspondingly, electrical signal-to-noise ratio (SNR_e), equivalent linewidth ((Delta) (upsilon) _eq and optical signal-to-noise ratio (SNR_o) are used to characterize system performance. It is found that for IM systems, an optimal P₀ corresponding to minimum SNR_e exists in positive dispersion fibers, and input optical power cannot be arbitrarily increased to improve SNR_e even though only noise is considered. On the contrary, in negative dispersion fibers, SNR_e is improved with increasing P₀ monotonously. For PM systems with negligible laser phase noise and regardless of the sign of fiber dispersion, an optimal optical power also exists to ensure minimum phase noise. SNR_o, a combined contribution from intensity and phase noise, is better in fibers with negative dispersion than that in fibers with positive dispersion under the same P₀.

Citation Download Citation

Zhi Jiang, Qian Yu, and Chongcheng Fan "Rigorous analysis of noise evolution in nonlinear dispersive optical fiber", Proc. SPIE 4581, Passive Components and Transmission Systems, (17 October 2001); https://doi.org/10.1117/12.445050

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