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(71048 Pages: 2

An InGaAs pin photodiode has 751300 nm, Ip = 4 nA, 1. = 0.90, र == 1000 Q, and the surface
leakage current is negligible. The incident optical power is 300nW (-35 dBm) and the receiver
bandwidth is 20 MHz. Find the various noise terms of the receiver.

What are the essential components required for establishing a point- to point link.

What are the various losses associated with it? Explain with neat optical power loss

model.

PART ^

Answer any two full questions, each carries 20 marks.
Explain the Fiber Bragg Grating technology and point two applications.
Explain the working of Semiconductor Optical Amplifier.
Compare the performance of different optical amplifiers.
Explain the working principle of EDFA. Give the advantages of EDFA.
How does an OTDR work? Draw the typical OTDR trace. Name two faults that
can be detected by OTDR.
Explain with block diagram the working of optical add/drop multiplexer. Explain
why it is required in optical communication system.
Explain the working of TDFA.
What is Li Fi technology?

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