Optimized design of two-pump fiber optical parametric amplifier with two-section nonlinear fibers using genetic algorithm

Mingyi Gao,Jingyuan Wang,Chun Jiang,Weisheng Hu

doi:10.1364/opex.12.005603

Mingyi Gao, Jingyuan Wang + Show 2 more

Open Access

https://doi.org/10.1364/opex.12.005603

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Journal: Optics Express	Publication Date: Jan 1, 2004
Citations: 44	License type: cc-by

Affiliation: Shanghai Jiao Tong University

Abstract

A new two-pump fiber optical parametric amplifier (FOPA) is presented, which is composed of two-section high nonlinear fibers (HNLFs). Genetic algorithm (GA), a multivariate stochastic optimization algorithm is applied to optimize parameters of two fiber segments, such as the length and dispersion coefficient of fiber. A broadband FOPA with twosection HNLFs is obtained using optimum design parameters, which theoretically provides a uniform gain of 20.3 dB with 0.2-dB uniformity over a 346-nm bandwidth.

Highlights

At present, the rapid development of optical fiber communications along with large-capacity broadband transmission systems has led to the growth of requirement to super-broadband optical amplifiers
A new two-pump fiber optical parametric amplifier (FOPA) with twosection high nonlinear fibers (HNLFs) is achieved using optimum parameters calculated by Genetic algorithm (GA), which theoretically provides a uniform gain of 20.3 dB with 0.2-dB uniformity over a 346-nm bandwidth
We consider the gain of a two-pump FOPA using a multi-section HNLFs configure at the output of the first-section fiber with nonlinear coefficient γ =20 km-1W-1, for which the zero-dispersion wavelength (ZDW) is λ0=1500 nm with dispersion parameters β(2)= 0 ps2km-1 and β(4)= −2.85×10−4 ps4km-1

Summary

Introduction

The rapid development of optical fiber communications along with large-capacity broadband transmission systems has led to the growth of requirement to super-broadband optical amplifiers. Simple single-pump FOPA could experimentally offer a gain bandwidth of more than 200 nm, the gain spectrum was not uniform over the amplifier bandwidth but had a difference as high as 15 dB between the lowest and the highest value [8]. Such a large gain ripple makes it difficult to equalize the power of the various channels in wavelength-division multiplexing (WDM) systems. For this reason, much research has been done to flatten the gain spectrum of FOPA. A new two-pump FOPA with twosection HNLFs is achieved using optimum parameters calculated by GA, which theoretically provides a uniform gain of 20.3 dB with 0.2-dB uniformity over a 346-nm bandwidth

Theory and scheme of FOPA

Genetic algorithm to optimize FOPA

Result and discussion

Conclusion