表面涂覆胆固醇液晶-垂直腔面发射激光器的偏振特性  

Polarization Controlling of Vertical Cavity Surface Emitting Laser with Cholesteric Liquid Crystal Overlay

作　　者：王红英[1] 成桢[1] 赵小侠[1] 李院院[1] 

机构地区：[1]西安文理学院物理与机械电子工程学院,陕西西安710065

出　　处：《激光与光电子学进展》2014年第11期156-160,共5页Laser & Optoelectronics Progress

基　　金：西安市科技计划创新基金"文理专项"重点项目(CX12189WL01;CX12189WL02)与面上项目(CXY1352WL31)

摘　　要：利用胆固醇液晶（CLC）涂覆于垂直腔面发射激光器（VCSEL）表面,将其作为VCSEL输出偏振调控单元,测量并分析了CLC-VCSEL的I-P特性、不同抽运电流下的偏振输出特性以及功率输出稳定性。实验结果表明,同一工作温度下,CLC-VCSEL的阈值电流比单独VCSEL的阈值电流增加了0.35 m A。CLC-VCSEL的偏振态对注入电流非常敏感。当注入电流为1.4 m A时,CLC-VCSEL表现出优良的功率稳定性能,在LCLC=4.62-5.95 mm范围内,获得了有效的圆偏振光输出。The characteristics of vertical cavity surface emitting laser（VCSEL） polarization with cholesteric liquid crystal（CLC） overlay is presented. I-P characteristics, output polarization at different pump currents and output power stability are investigated. The experimental results show that threshold current is increased by0.35 m A comparing with alone VCSEL at the same operating temperature. Polarization state of CLC- VCSEL is greatly sensitive to input current. Stable output power has been obtained at I=1.4 m A, and effective circle polarization at the range of LCLC= 4.62-5.95 mm is also achieved.

关 键 词：垂直腔面发射激光器 偏振特性 胆固醇液晶 半导体激光 功率稳定 

分 类 号：TN248.4[电子电信—物理电子学]