Question

In optical fiber communication, the APD semi conductor device is used 

(A) to convert radio signal into optical signal. 

(B) to obtain intensity modulated signal 

(C) to covert optical signal into electrical signal 

(D) to covert optical signal into radio signal.

Answer 1

The correct option is (C) to covert optical signal into electrical signal.

Explanation:

In optical fiber communication, Avalanche Photodiodes (APD) are used to covert optical signal to electrical signal.