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Describe the working of IMDD system with figure.
Briefly explain design of optical receivers.
Write a short note on probability of error in digital receiver performance.
PART C
Answer any two full questions, each carries 20 marks.
Write a short note on EDFA with figure.
Explain the various advantages of SOA.
Briefly explain Raman Amplifier with figure.
Briefly explain the WDM concept.
Write a short on Bragg Grating with figure.
Briefly explain tunable filters.

Briefly explain the free space optical communication with block diagram.

Consider a fiber grating with the following parameter, L=0.5cm,

ಸೂ = 1530nm, ner = 1.48, 01 = 2.5x 104 and n= 82 %. Calculate the coupling

coefficient « and the full bandwidth ಗಿ). over the maximum reflectivity.

Explain the working of OTDR with diagram.

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