Could you please describe your application: 2}~1poyi>
1, is the emitting source single mode or multimode? what are the parameters i.e. divergence, waist, ... `j_R ?mY
2, is the fiber single mode or multimode? what is the NA, core dia,... c)iQ3_&=
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Generally, fiber coupling efficiency of 40%~90% is reasonable. 8{%/!ylJz
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Again let us know your specific bug.
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