Crosstalk limitations due to fiber nonlinearities and ASE on the BER performance of a coherent WDM transmission system with a DRA

Fahmida Hossain Tithi; Satya Prasad Majumder

doi:10.1364/AO.390728

Applied Optics
Vol. 59,
Issue 20,
pp. 6085-6093
(2020)
•https://doi.org/10.1364/AO.390728

Crosstalk limitations due to fiber nonlinearities and ASE on the BER performance of a coherent WDM transmission system with a DRA

Fahmida Hossain Tithi and Satya Prasad Majumder

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Fahmida Hossain Tithi and Satya Prasad Majumder, "Crosstalk limitations due to fiber nonlinearities and ASE on the BER performance of a coherent WDM transmission system with a DRA," Appl. Opt. 59, 6085-6093 (2020)

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Table of Contents Category
- Fiber Optics, Fiber Sensors, and Optical Communications
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About this Article
History
- Original Manuscript: February 19, 2020
- Revised Manuscript: June 7, 2020
- Manuscript Accepted: June 8, 2020
- Published: July 8, 2020

Abstract

An analytical development is presented to assess the collective effect of fiber nonlinearities such as cross-phase modulation (XPM), stimulated Raman scattering (SRS), and amplified spontaneous emission (ASE) due to a distributed Raman amplifier (DRA) on the bit error rate (BER) performance of a wavelength division multiplexing transmission system with forward pumping and a coherent optical receiver. Expressions are developed for a signal to crosstalk plus the noise ratio at the output of the optical fiber and optical receiver. The analytical results are found to match simulation results reported earlier, and coherent detection is found to be less affected by nonlinear effects compared to direct detection. XPM causes about 20–30 dB more penalty than ASE or SRS.

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Parameter	Value
Effective core area, $A_{e f f}$	$50 {µ m}^{2}$
Fiber attenuation constant, $α$	$0.046 {k m}^{- 1}$
Slope of Raman gain, $g^{/}$	$4.9 \times 10^{- 20} m / (W G H z)$
Input signal power, $P_{i n, s}$	1–10 mW
Pump power, $P_{i n, p}$	10–50 mW
Channel bandwidth, $B_{o}$	12.5–100 GHz
Receiver bandwidth, $B$	5–10 GHz
Guard band, $B_{g}$	0.2 GHz
Data rate, $R_{b}$	10 Gbps
Signal wavelength, $λ_{s}$	1420–1470 nm
Pump wavelength, $λ_{p}$	1515–1530 nm
Dispersion, $D$	16.4 ps/nm-Km
Group velocity of signal wave, $v_{g s}$	$2 \times 10^{8} {m s}^{- 1}$
Group velocity of pump wave, $v_{g p}$	$2.5 \times 10^{8} {m s}^{- 1}$
Light velocity, $c$	$3 \times 10^{8} {m s}^{- 1}$
Nonlinear coupling coefficient, $γ_{1}$	$1.18 \times 10^{- 3} 1 / m-W$
Local oscillator power, $P_{l o}$	10 mW

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Applied Optics