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根据窄带相位调制光在非线性吸收介质中的近简并四波混频的物理机理,分析了采用电光调制器实现调制转移光谱(MTS)技术的电磁场激励及其动态演化过程,建立了MTS中频率色散谱和吸收谱的理论模型.研究结果表明:以分子吸收谱线色散谱信号作为频率误差鉴别信号时,系统调制频率取0.72倍谱线线宽附近可以得到最佳的色散信号强度;解调相位的变化对吸收谱的影响很大,但对色散谱而言,解调相位在90°附近的小范围波动对频率误差信号解调效果影响不大;调制度在0.5—1区域可以得到较好的综合稳频效果.
According to the physical mechanism of near-deconvolution and four-wave mixing of narrowband phase-modulated light in nonlinear absorption medium, the excitation and dynamic evolution of electromagnetic field using modulation electro-optical modulator (MTS) technology are analyzed. The MTS Frequency dispersion spectrum and absorption spectrum.The results show that the optimal dispersion signal intensity can be obtained when the system modulation frequency is around 0.72 times the spectral linewidth when the molecular absorption spectrum chromatic dispersion spectrum signal is used as the frequency error identification signal The phase shift has a great influence on the absorption spectrum. However, for the dispersion spectrum, the small-scale fluctuation of the demodulation phase near 90 ° has little effect on the demodulation of the frequency error signal. The modulation degree can be obtained in the region of 0.5-1 Better integrated frequency stabilization effect.