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April 6, 2023 at 2:08 am
Sinhana
Subscriber孙老师好,希望仿真超透镜直接集成在多模光纤末端的情况,请问多模光纤的输入要用什么光源?
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April 6, 2023 at 5:57 pm
Guilin Sun
Ansys Employee这个问题可能要分情况。你是将光从多模光纤里耦合出来还是耦合进去?看你的问题似乎是要耦合出来。一般我们也不知道每个模式传播到光纤端面时的位相,简单的方法就是假设它们位相都是零,原则上单个模式仿真,结果相干叠加还是非相干叠加你需要考虑,但是这样需要太多的仿真文件,因为一般都有上百个模式。或者将这些模式全部相干或者非相干叠加作为光源来仿真。
至于是相干叠加还是非相干叠加,你需要考虑,根据光纤具体情况分析,一般激发多模光纤的光源如LED可能被认为是非相干的,你们实际实验用的什么光源?这个问题可能也比较重要。
这些模式可能不会聚焦在一起吧?器件是为了提高耦合效率?
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