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 mA。CLC-VCSEL 的偏振态对注入电流非常敏感。当注入电流为1.4 mA 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 by 0.35 mA 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 mA, and effective circle polarization at the range of LCLC= 4.62~5.95 mm is also achieved.