Determine coupling efficiency into the fiber when GaAs LED is in close proximity to fiber core having numerical aperture of 0.3
A)0.9
B)0.3
C)0.6
D)0.12

Question

Quizplus · Accepted Answer

The coupling efficiency is determined by the numerical aperture of the fiber and the acceptance angle of the LED. The numerical aperture is given as 0.3, which means that the maximum acceptance angle of the fiber is 17.5 degrees. The acceptance angle of the LED is not given, but it is typically around 10 degrees. Therefore, the coupling efficiency is approximately 0.9, which is the ratio of the acceptance angle of the fiber to the acceptance angle of the LED.

Determine Coupling Efficiency into the Fiber When GaAs LED Is