射线法研究光纤光栅外腔半导体激光器输出功率特性

Investigation of the Output Power Characteristics of Fiber Grating External Cavity Semiconductor Lasers Using the Ray Tracing Method

采用射线法,导出了光纤光栅外腔半导体激光器(FGESL)输出功率的表达式.结合载流子速率方程,对外腔半导体激光器的P-I特性进行了研究.结果表明:随着耦合效率的增大,输出功率整体上呈现上升的趋势,并在上升过程中出现的抖动越来越小;对于不同的外腔长度,在某些注入电流下,若相干条件能很好的满足,则可得到一个较大的输出,在P-I曲线上呈现出明显的抖动.

Based on the ray tracing method, the expression of the output power of the fiber grating external cavity semiconductor lasers（FGESL） has been deduced firstly. As a result, the P- I characteristics of FGESL have been investigated. The results show that： with the increase of the coupling efficiency, the output power will increase on the whole, and become more smooth,about the different length of external cavity, with some injected current,if there are the better condition of coherent, FGESL has the bigger output power,the P- I characteristics of FGESL will change obviously.