外腔半导体激光器中反馈耦合系数及介质吸收系数的测量

Measurement of Feedback Coupling and Absorption Coefficient in External Cavity Laser Diodes

在室温下研究了外腔反馈对ＧａＡｌＡｓ量子阱半导体激光器阈值的影响，提出了测量实际反馈量及半导体激光器增益介质吸收系数的方法，利用所测反馈系数及阈值得到了反馈耦合因子ｋ。

 The effect of threshold of the indexguided quantum well GaAlAs laser diodes in the external cavity feedback was studied at room temperature. A way of measuring the absorption coefficient and the actual amount of feedback was demonstrated. By measuring the threshold reduction of laser diodes with different feedback, we got the feedback coupling constant  k and the absorption coefficient of α