In a GaAs LED, compute the loss relative to internally generated optical power in the fiber when there is small air gap between LED and fiber core. (Fiber coupled = 5.5 * 10-4Pint)
A)34 db
B)32.59 db
C)42 db
D)33.1 db

Question

Quizplus · Accepted Answer

The loss relative to internally generated optical power in the fiber, when there is a small air gap between the LED and the fiber core, can be calculated using the formula for optical power loss in decibels (dB): Loss (dB) = -10 * log10(Pout/Pin), where Pout is the output power and Pin is the input power. Given that the fiber-coupled power is 5.5 * 10^-4 times the internally generated power (Pint), we can set Pout = 5.5 * 10^-4 * Pint and Pin = Pint. Substituting these values into the formula gives Loss = -10 * log10(5.5 * 10^-4), which calculates to approximately 32.59 dB.

In a GaAs LED, Compute the Loss Relative to Internally