[求助]用ZEMAX计算光纤的耦合效率 [复制链接]

我用ZEMAX计算光纤的耦合效率，可是我发现当接收光纤的数值孔径增大时耦合效率反而降低了，这是怎么回事呢？

模场分布约接近，耦合效率越高，跟NA无关

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我也想知道

谢谢  学学

能否请问五楼的大侠怎么做到的，谢谢啊~~335797507@qq.com

            

System Efficiency              :      0.999138 #hZ$;1.  
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Receiver Efficiency            :      0.945327 go uU  
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Coupling Efficiency            :      0.944512 (-0.2479 dB) MY^{[#Q  
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Maximum Efficiency              :      0.995227 $')C&  
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The system efficiency is the fraction of the energy in the source o8bdL<  
beam that exits the optical system. This value is determined by hJ@vlMW  
the input na, entrance pupil size and position, apodization, ?nd: :O  
transmission of the optics, and vignetting. 2s\ClT  
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The receiver efficiency is the fraction of the transmitted energy t~) P1Lof\  
that couples from the exit pupil to the receiving fiber. This BNu >/zGpB  
value is determined by aberrations and the na of the receiving fiber. Yq+1kA  
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The coupling efficiency is the fraction of energy radiated !@
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by the source that couples into the receiver. This is the ')y2W1  
product of the system and receiver efficiencies. FE~D:)Xj'?  
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The maximum efficiency is the coupling efficiency if there &|/_"*uM  
were no aberrations. zR"cj  
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数值孔径不是越大越好呀,当耦合光学系统的模式与你光线的模式完全匹配时,耦合效率最大. 1@F-t94I  
耦合效率的计算有一个积分过程,还是比较复杂的.

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有没有这方面的书籍？