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G192121 Pages:2

Explain the working principle of electro-absorption with any one type of
modulator.
PART C
Answer any two full questions, each carries 20 marks.
Explain different types of fixed optical filters

Describe the structure of Polymer LED. List the advantages and disadvantages of
Polymer LED.

With suitable diagram explain unidirectional and _ bidirectional WDM
transmission system.

A Si APD has a QE of 70 % at 830 nm in the absence of multiplication, that is
M = 1. The APD is biased to operate with a multiplication of 100. If the incident
optical power is 10 nW , what is the photocurrent?

Explain different types of add and drop multiplexer.

Describe the structure of thin film transistor display.

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