Could you please describe your application: Q\btl/?
1, is the emitting source single mode or multimode? what are the parameters i.e. divergence, waist, ... y!
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2, is the fiber single mode or multimode? what is the NA, core dia,... agQDd8 oX
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Generally, fiber coupling efficiency of 40%~90% is reasonable. =F
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Again let us know your specific bug. )CgH|z:=b
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