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本文从相干合成的基本原理出发,建立计算模型,通过对多波长两路相干合成实例的仿真计算,得到了多波长两路相干合成效果的预测公式;在多波长相干合成中光程差至关重要,按照能否进一步通过主动控制,获得好的合成效果,可将光程差划分为可控区和不可控区两类,只有当光程差处于可控区时,才能进一步通过主动控制获得好的合成效果;在光程差任取的情况下,光程差处于可控区,能够通过主动控制获得好的合成效果的概率与光谱结构紧密相关,近似随着波长数目的增多成反比减少.对于多波长相干合成可采取复合控制的方式,先利用大光程控制器件将光程差控制在可控区,然后进一步采用光程精控器件实现锁相.
In this paper, the basic principles of coherent synthesis, the establishment of a computational model, through the simulation of two multi-wavelength coherent synthesis example, the multi-wavelength two-way coherent synthesis prediction formula was obtained; in the multi-wavelength coherent synthesis optical path difference between the off Importantly, according to the ability of further active control to obtain good synthesis effect, the optical path difference can be divided into two types: controllable zone and uncontrollable zone. Only when the optical path difference is in the controllable zone can the control be further obtained through active control Good synthesis effect; in the case of optical path difference, the optical path difference is in the controllable area, the probability of obtaining good synthesis effect through active control is closely related to the spectral structure, and the approximation decreases inversely with the increase of the number of wavelengths For multiwavelength coherent synthesis can take composite control approach, the first use of large optical path control device to control the optical path difference in the control area, and then further use optical precision control device to achieve phase-locked.