Propagation characteristics of ultrashort optical pulse passing through distributed fiber amplifiers

ZHOU Xiao-hong; WANG Li; GAO Xiao-rong; WANG Ze-yong; LUO Bin

doi:10.3969/j.issn.1001-3806.2011.02.037

In order to discuss the propagation and amplification characteristics of ultrashort optical pulse in distributed fiber amplifiers and the influencing factors,its basic propagation equation was established.Taking an ytterbium-doped fiber amplifier as example,the evolution of optical pulse in the amplifier was simulated by means of split-step Fourier transform method.Then the effect of initial chirp and gain dispersion were discussed.The results show that when the optical pulse propagates in a distributed optical fiber amplifier,dispersion and nonlinear effect of the fiber will affect pulse profile and frequency spectrum, and initial chirp also influence the propagation state of optical pulse.For wide-spectrum optical pulse,gain dispersion is equivalent to a loss mechanism,so its influence should be considered.Relevant results have certain reference value to the system design and optimization of optical fiber amplifiers.

Propagation characteristics of ultrashort optical pulse passing through distributed fiber amplifiers

Corresponding author: LUO Bin, bluo@home.swjtu.edu.cn

1. College of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China;

2. College of Information Science and Technology, Southwest Jiaotong University, Chengdu 610031, China

Received Date: 2010-07-19

Accepted Date: 2010-09-13

Available Online: 2011-03-25

Abstract: In order to discuss the propagation and amplification characteristics of ultrashort optical pulse in distributed fiber amplifiers and the influencing factors,its basic propagation equation was established.Taking an ytterbium-doped fiber amplifier as example,the evolution of optical pulse in the amplifier was simulated by means of split-step Fourier transform method.Then the effect of initial chirp and gain dispersion were discussed.The results show that when the optical pulse propagates in a distributed optical fiber amplifier,dispersion and nonlinear effect of the fiber will affect pulse profile and frequency spectrum, and initial chirp also influence the propagation state of optical pulse.For wide-spectrum optical pulse,gain dispersion is equivalent to a loss mechanism,so its influence should be considered.Relevant results have certain reference value to the system design and optimization of optical fiber amplifiers.

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Reference (16)

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Propagation characteristics of ultrashort optical pulse passing through distributed fiber amplifiers

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