Could you please describe your application: 45WJb+$
1, is the emitting source single mode or multimode? what are the parameters i.e. divergence, waist, ... U*?`tdXJ$
2, is the fiber single mode or multimode? what is the NA, core dia,... P~%+KxwZQ
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Generally, fiber coupling efficiency of 40%~90% is reasonable. YLuf2ja}X
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Again let us know your specific bug. lSc=c-iOv
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