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高功率光纤放大器中光纤端面处理分析

Effect of inclined surface of fiber end on high power fiber amplifier

陈爽   冯莹  
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摘要

光纤端面进行斜面抛光一直是高功率光纤放大器中抑制ASE和自激振荡的关键技术。根据放大器结构建立了光纤端面信号光注入、信号激光输出以及泵浦光耦合的物理模型,数值模拟了不同光纤斜端面角度下信号光、泵浦光的耦合效率,纤芯端面的回波损耗。结果表明信号光注入端面斜面处理会导致耦合效率降低,输出端面斜角处理可有效减小端面反射率,而微小斜角对泵浦激光进入光纤内包层的耦合效率影响不大;根据不同的光纤参数选择合理的斜角处理可以有效提高放大器性能。

Abstract

The fiber end with polished inclined-surface is important to reduce the ASE and restrain the selfoscillations for the high power fiber amplifier. Physical models of fiber end with different signal input,output and coupling of pump light are set up. Theoretical analysis,numerical simulation of coupling efficiency and return loss of the fiber end with variable angles of the inclined surface are performed. The results show that the coupling efficiency and return loss of the signal light are affected obviously by the fiber inclined angle,which can improve the performance of the fiber amplifier if the angle is choosen properly.

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中图分类号:TN248.1

所属栏目:激光技术与器件

收稿日期:2008-01-11

修改稿日期:2008-03-27

网络出版日期:0001-01-01

作者单位    点击查看

陈爽:国防科技大学光电科学与工程学院,湖南 长沙 410073
冯莹:国防科技大学光电科学与工程学院,湖南 长沙 410073

联系人作者:陈爽(leocs@hotmail.com)

备注:冯莹|女|博士,教授,博士生导师|主要研究方向为集成光学,光纤光源及光纤激光器,光纤生物传感器等

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