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对基于模式色散的全光积分器进行数值仿真和实验研究,实现了一种一维展宽倾斜入射方式的全光积分器。在模式色散的作用下,光信号经过光纤时不同的模式产生了不同的延时,叠加后产生了积分的效果;选用了较大面积的高速光电探测器(PD)接收多模光纤(MMF)的输出光束,利用50m的MMF实现了时间窗口约为1.5ns的全光积分器;最后使用该积分器对光信号进行了积分实验。由于使用模式色散作为产生时延的主要方法,因此方法具有与波长无关的特性,而且能在很短的光纤上获得较大的时间窗口。一维展宽的入射方式具有很好的灵活性,易于调试和控制。
The whole optical integrator based on modal dispersion is numerically simulated and experimentally studied, and a one-dimensional all-optical integrator with extended oblique incidence mode is realized. Under the effect of mode dispersion, different modes of optical signals pass through the optical fiber to produce different delays, which have the effect of integral after being superposed. A large area of high speed photodetector (PD) is adopted to receive multimode optical fiber (MMF) Of the output beam, the use of 50m MMF time window of about 1.5ns all-optical integrator; Finally, the use of the integrator on the optical signal integration experiment. Because of the use of mode dispersion as the primary method for generating delays, the method has wavelength-independent properties and allows for a large window of time over very short fibers. The one-dimensional spread of the incident has a good flexibility, easy to debug and control.