[Solved] Determine the overall power conversion efficiency of lens coupled SLED having forward current of 20 mA and forward voltage of 2 V with 170 μWof optical power launched into multimode step index fiber.

Q.	Determine the overall power conversion efficiency of lens coupled SLED having forward current of 20 mA and forward voltage of 2 V with 170 μWof optical power launched into multimode step index fiber.
A.	1.256*10-5
B.	4.417*102
C.	4.25*10-3
D.	2.14*10-3
Answer» C. 4.25*10-3

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