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光反馈垂直腔面发射激光器相干长度的调控

发表时间:2009-08-15  浏览量:1482  下载量:675
全部作者: 樊林林,王云才,王安帮,孔令琴
作者单位: 太原理工大学理学院
摘 要: 利用Lang�Kobayashi速率方程,分析了外光反馈下,反馈强度及偏置电流对垂直腔面发射半导体激光器(vertical�cavity surface�emitting lasers, VCSELs)相干长度的影响。研究发现:VCSELs的相干长度随反馈强度的增加而减小,而偏置电流对其相干长度无明显影响。结果表明:通过引入光反馈并调节反馈强度的方法,可有效控制激光器的相干长度,使其从无反馈时的30 m连续调至3 mm.
关 键 词: 激光物理;垂直腔面发射激光器;相干长度;光反馈;非线性
Title: The controlled adjustment of the coherence length of vertical�cavity surface emitting lasers with external optical feedback
Author: FAN Linlin, WANG Yuncai, WANG Anbang, KONG Lingqin
Organization: College of Science, Taiyuan University of Technology
Abstract: This paper numerically analyzed the effects on the coherence length of vertical�cavity surface�emitting lasers (VCSELs) subject to optical feedback and bias current from the external cavities by using Lang�Kobayashi rate equations. It is found that the coherence length of VCSELs is decreased depending on the increase of the feedback intensity for long external cavities, but is insensitive to its bias current. Numerical results show that the coherence length of VCSELs can be shortened continuously in a wide range from thirty meters of solitary laser to three millimeters by the optical feedback technique, This property facilitates application in novel measurement technology in which coherence properties are of importance.
Key words: laser physics; vertical�cavity surface�emitting lasers; coherence length; optical feedback; nonlinear
发表期数: 2009年8月第15期
引用格式: 樊林林,王云才,王安帮,等. 光反馈垂直腔面发射激光器相干长度的调控[J]. 中国科技论文在线精品论文,2009,2(15):1545-1549.
 
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