Download PTU. I.K. Gujral Punjab Technical University (IKGPTU) M.Tech. ECE 2nd Semester 74278 OPTICAL COMMUNICATION SYSTEMS Question Paper.
Roll No. Total No. of Pages : 01
Total No. of Questions : 08
M.Tech.(ECE) (2016 Batch) (Sem.?2)
OPTICAL COMMUNICATION SYSTEMS
Subject Code : MTEC-201
M.Code : 74278
Time : 3 Hrs. Max. Marks : 100
INSTRUCTIONS TO CANDIDATES :
1. Attempt any FIVE questions out of EIGHT questions.
2. Each question carries TWENTY marks.
1. Explain the various power transmission loss mechanisms in the optical fibers. What are
reasons of this fibers losses and how they can be reduced, discuss considering various
optical transmission windows.
2. Discuss the design of optical transmitter in detail.
3. An analog optical fiber system has a modulation bandwidth of 40 MHz and a modulation
index of 0.6. The system utilizes an APD receiver with responsivity 0.7 and is quantum
noise limited. An SNR (rms signal power to rms noise power) of 35 dB is obtained when
the incident optical power at the receiver is ?30dBm. Assuming the detector dark current
may be neglected, determine the excess avalanche noise factor at the receiver.
4. What is principle of fiber Raman amplification in optical communication systems and
how it is different from erbium doped fiber amplifiers? Compare these two fiber optical
amplifiers from application point of view.
5. Explain high capacity point to point WDM lightwave systems.
6. What is the need of dispersion management of single mode fibers in optical
communication systems? Explain dispersion management with dispersion compensating
fiber.
7. Explain loss managed fiber solution transmission systems in detail.
8. Write a short note on the following :
a) WDM components
b) Code division multiplexing.
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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This post was last modified on 13 December 2019