Could you please describe your application: |VIBSty2d 1, is the emitting source single mode or multimode? what are the parameters i.e. divergence, waist, ... k@^)>J^ 2, is the fiber single mode or multimode? what is the NA, core dia,... Ef69]{E 5E$)Ip Generally, fiber coupling efficiency of 40%~90% is reasonable. Lf3:' n Gt' %:9r Again let us know your specific bug. z"|^Y|`m C;_10Rb2ut MANG2004 mjfU[2