Study of depolarization of Raman pump source

LUO Yong~

doi:10.13756/j.gtxyj.2006.03.017

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Study of depolarization of Raman pump source

- Study of depolarization of Raman pump source
- Study on Optical communication Issue 3, Pages: 54-57(2006)
- 作者机构：
  
  1. 华中科技大学光电子工程系
  2. 武汉邮电科学研究院
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2006.03.017
  CLC： TN245
- Published：2006，
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[1]罗勇,孙军强,许远忠.拉曼泵浦光源退偏技术研究[J].光通信研究,2006(03):54-57.

LUO Yong~. Study of depolarization of Raman pump source. [J]. (3):54-57(2006)
[1]罗勇,孙军强,许远忠.拉曼泵浦光源退偏技术研究[J].光通信研究,2006(03):54-57. DOI： 10.13756/j.gtxyj.2006.03.017.

LUO Yong~. Study of depolarization of Raman pump source. [J]. (3):54-57(2006) DOI： 10.13756/j.gtxyj.2006.03.017.

摘要

文中利用琼斯（Jones）矩阵和斯托克斯参量分别对几种拉曼泵浦光源退偏方式进行了理论分析

并对实际的激光器光谱进行了偏振度的数值计算。在采用基于偏振合光（PBC）的方法进行退偏时

只有当两激光器的光功率相同时才可以得到最小的偏振度;在采用偏振合光加双折射晶体退偏（PBCD）时

计算表明

随着晶体长度的变化

偏振合波后的偏振度总小于单只激光器通过晶体后的偏振度

因此晶体长度的设计应为使单只激光器退偏所要求的晶体长度

这样可保证不同泵浦情况下的偏振度。文中的设计方法和结论对拉曼放大器的泵浦光源退偏设计具有一定参考作用。

Abstract

Theoretical analysis has been made of several kinds of Raman pump laser depolarization based on Jones matrix and Stock parameters and the numerical computation of the depolarization degrees of the actual laser spectrums performed.When the Polarization Beam Combined（PBC） method is adopted

the minimum Degree Of Polarization（DOP） can be obtained only when the optical powers of the two lasers are identical.However

when PBC plus the birefringent crystal depolarization are adopted

the DOP after PBC is always smaller with the variations of the crystal length than that when a single laser runs through the crystal.Therefore

the crystal length should be so designed as required by single laser depolarization to maintain the DOP with different pump sources.The design method and conclusion presented in this paper may contribute to the depolarization design for the pump laser of Raman amplifiers.

关键词

琼斯矩阵斯托克斯参量拉曼放大器偏振度

Keywords

Jones matrixStocks parameterRaman amplifierDOP

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School of Science, Beijing University of Posts and Telecommunication

School of Mechanical and Electronic Engineering,Beijing Polytechnic

SKL of OCTN,Wuhan Accelink Technology Co.,Ltd.

Research Institute of Optoelectronics Technology,China Institute of Metrology

北京交通大学光波技术研究所北京100044

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