Briefly discuss the possible sources of noise in optical fiber receiver. Describe in detail. What is meant by quantum noise? Consider this phenomenon with regard to

(i) Digital signaling (ii) Analog transmission.

Mumbai University > Electronics Engineering > Sem7 > Optical Fiber Communication

Marks: 10M

Year: Dec2013, May2012

Noise: Noise is a term generally used to refer to any spurious or undesired disturbances that mask the received signal in a communication system. There are three main types of noise due to spontaneous fluctuations in optical fiber communication system: Thermal noise, dark current noise and quantum noise.

• Thermal noise: …