Suppression of residual pump component for flat supercontinuum generation in dispersion-flattened dispersion-decreasing fibers

被引：0

作者：

Xu, Yong-Zhao ^{[1
]}

Song, Jian-Xun ^{[1
]}

Ling, Dong-Xiong ^{[1
]}

Ye, Hai ^{[1
]}

Li, Hong-Tao ^{[1
]}

Han, Tao ^{[1
,2
]}

机构：

[1] School of Electronic Engineering, Dongguan University of Technology, Dongguan, 523808, Guangdong

[2] Dongguan Institute, Sun Yat-sen University, Dongguan, 523808, Guangdong

来源：

Guangzi Xuebao/Acta Photonica Sinica | 2015年 / 44卷 / 04期

关键词：

Dispersion-flattened dispersion-decreasing fiber; Nonlinear optics; Pulse compression; Solitons; Supercontinuum generation;

D O I：

10.3788/gzxb20154404.0406002

中图分类号：

学科分类号：

摘要：

Numerical simulations based on generalized nonlinear Schrödinger equation were used to study the suppression of residual pump component of supercontinuum generated in dispersion-flattened dispersion-decreasing fibers. The results show that the shape of a supercontinuum spectrum is uniquely specified by the input soliton order N, the normalized quadratic dispersion coefficient Δ2 and the normalized effective fiber length ξ0. For a pump pulse with a given N and a given value of Δ2, the shape of a supercontinuum spectrum depends on ξ0. By appropriately choosing ξ0, the residual pump component can be suppressed effectively and a supercontinuum with desirable spectral flatness can be obtained. In order to obtain the optimal value of ξ0, S-factor is introduced to estimate the fluctuation of supercontinuum spectrum. The smaller the value of S-factor, the flatter the generated spectrum. Keeping N and Δ2 constant, S-factor of the generated supercontinuum spectrum for different value of ξ0 was calculated. When S-factor reaches a minimum value, the residual pump component is suppressed to the utmost extent and a flattest supercontinuum spectrum is obtained. The corresponding ξ0 is the optimal value of ξ0. The optimal value of ξ0 for the pump pulses with soliton order N in the range 1.0≤N≤2.2 was calculated. It is found that when N decreases, the optimal value of ξ0 increases. To generate a supercontinuum spectrum with weak residual pump component, lower-order soliton pulses are preferable to higher-order soliton pulses. ©, 2015, Chinese Optical Society. All right reserved.

引用

页数：6

共 16 条

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