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Question

Single mode fiber coupling efficiency calculation


feast

Hello, I have a two lens system and I get a high copling efficiency. Now I need to simulate the coupling efficiency  in the situation of  removing the collimating lens. The physical optics give a efficiency of 0.0156%, is it reasonable? I also want to know the difference of the position of the focusing lens in front of the fiber in the situation of removing collimating lens and keeping it. Thanks!