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光梳的出现带来了大尺寸高精度绝对测距(ADM)技术的革新,其卓越的光频特性推动了基于多波长干涉的实时ADM的发展。为在基于光梳多波长干涉的实时ADM中实现干涉信号的同步相位解调,提出了基于多波长外差干涉的多路同步相位解调信号处理方法,研制了相应的同步相位解调模块。实验中通过对波长进行解复用,测试了多路相位计的线性精度、稳定度和同步性等性能,对多波长干涉信号的实时同步相位解调进行了实验分析,验证了该方法实现高精度同步相位解调的可行性。
The emergence of optical combs has led to the evolution of large-size, high-precision absolute distance measurement (ADM) technology, and its superior optical properties have driven the development of real-time ADMs based on multiwavelength interference. In order to realize the demodulation of the interferometric signal in the real-time ADM based on the multi-wavelength combing of optical combs, a multi-channel synchronous phase demodulation signal processing method based on multi-wavelength heterodyne interference is proposed and a corresponding synchronous phase demodulation module is developed. In the experiment, the linearity, stability and synchronization of multi-channel phase meter were tested by demultiplexing the wavelength, and the real-time synchronous phase demodulation of multiwavelength interference signal was analyzed experimentally. The results show that this method achieves high Feasibility of precision synchronous phase demodulation.