How far is the circular area from the glass window

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Reference no: EM13273640

A fiber has n1=1.53, n2=1.46 and a core diameter of .080 mm. It is to be coupled to a photodiode whose circular sensitive area is 20mm². It has been found that there is 2.75 db of coupling loss present. How far is the circular area from the glass window?

Reference no: EM13273640

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