针对调频小宽带脉冲传输过程中调频到调幅(FM-to-AM)效应的演化规律, 结合理论模拟与实验验证, 研究了一定线宽下不同级次光谱缺失或损耗所引起的脉冲的时间波形变化量及变化特征, 结果表明波形调制度与光谱成分缺失量成线性增长关系, 波形调制的轮廓与缺失光谱成分在光谱中的位置相关。这些结果为FM-to-AM效应的预补偿和抑制提供了依据, 对激光器安全运行和改善物理实验效果具有一定意义。

In allusion to the frequency modulation to amplitude modulation (FM-to-AM) effect in the transmission process of small broadband frequency modulation pulse, variation of pulse waveform and characteristics caused by loss of different orders in the spectrum is studied, combining theoretical simulation with experimental validation. The results show that the waveform modulation increases linearly with the loss of spectral component, and the outline of waveform modulation is associated with the positions of the missing spectral components in the spectrum. The results provide the basis of precompensation and inhibition of FM-to-AM effect, and make a certain significance for safe operation of laser facility and improvement of physical experiment results.