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微片激光器由于自身的内应力会输出频率分裂的正交偏振的两个模式.研究了回馈对微片激光器频差的影响.研究发现:在回馈的作用下微片激光器的频差大小呈现出以初始频差为中心的类正弦的频差调制,周期为λ/2;频差调制曲线的幅度与回馈水平成正比,但是当回馈水平过强时会出现偏振态跳变,从而使频差消失;在一定的回馈外腔范围内,频差调制曲线的幅度与初始频差亦成正比.并利用复合腔模型和激光器的自洽理论进行了理论分析和模拟,所得结果与实验结果相符.此调制现象在精密测量领域有潜在应用.
Due to its own internal stress, the microchip lasers output two modes of frequency-splitting orthogonal polarizations. The effect of feedback on the frequency offset of the microtiter lasers is studied. The results show that the frequency deviation of the microtable lasers appears as a feedback The frequency difference modulation of a sinusoidal frequency modulation centered on the initial frequency difference is λ / 2, and the amplitude of the frequency modulation curve is proportional to the feedback level. However, when the feedback level is too high, the polarization transition occurs, so that the frequency difference Disappears, and the range of the frequency modulation curve is proportional to the initial frequency difference within a certain range of feedback cavity. The theoretical analysis and simulation are carried out by using the self-consistent theory of the composite cavity model and the laser, and the results are in good agreement with the experimental results. This modulation phenomenon has potential applications in the field of precision measurement.