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为了改善980nm半导体激光器的输出光谱特性,采用传输矩阵分析法推导了双布喇格光纤光栅谐振腔的传输表达式,对布喇格光纤光栅长度和谐振腔腔长对输出光谱的影响进行模拟仿真,结果表明布喇格光纤光栅长度对输出光谱的影响大于谐振腔腔长对输出光谱的影响,加长布喇格光纤光栅长度能压缩输出光谱线宽.在980nm半导体激光器尾纤上写入不同布喇格光纤光栅长度的双布喇格光纤光栅谐振腔,验证了引入双布喇格光纤光栅谐振腔在压缩980nm半导体激光器输出光谱线宽的同时改善了其输出光谱的稳定性.当环境温度在0~75℃范围内变化时,980nm半导体激光器输出中心波长仅变化0.06nm.
In order to improve the output spectral characteristics of the 980nm semiconductor laser, the transfer matrix analysis is used to derive the transmission expression of the Bragg grating. The simulation results show the effect of the length of the Bragg grating and the cavity length on the output spectrum The results show that the influence of the length of Bragg fiber grating on the output spectrum is greater than the cavity length of the resonator on the output spectrum and the length of Bragg fiber grating can be extended to compress the output spectral linewidth.On the 980nm semiconductor laser pigtail, The results show that the introduction of the Bragg fiber grating resonator can improve the stability of the output spectrum while compressing the output spectral width of the 980nm semiconductor laser.When the ambient temperature is in the range of In the range of 0 ~ 75 ℃, the output wavelength of 980nm semiconductor laser changes only 0.06nm.