Optical Communication And Networks Question Paper - May 18 - Electronics And Telecomm (Semester 7)

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Optical Communication And Networks - May 18

Electronics And Telecomm (Semester 7)

Total marks: 80
Total time: 3 Hours
INSTRUCTIONS
(1) Question No. 1 is compulsory.
(2) Attempt any three from remaining five questions.
(3) Figures to the right indicate full marks
(4) Assume suitable data if necessary and mention the same in answer sheet.

Q1) Attempt any 5 questions.

a) Explain three operating windows in optical communication.
b) Compare between intermodal and intramodal dispersion. 944
c) Differentiate LED and LASER sources. 955
d) Explain the working principle of optical circulator. 972
e) What is Optical amplifier? 983 961
f) Define Cross talk and Solitons.

(20 marks)

Q2(a) A silica optical fiber has core refractive index of 1.4 and the cladding index of refraction is 1.35 .Determine

i) The critical angle
ii) Numerical aperture
iii) The acceptance angle

(10 marks) 921

Q2(b) Explain the signal attenuation in optical fiber and plot the three windows.

(10 marks) 00

Q3(a) Explain sources of loss at fiber joint.

(10 marks) 00

Q3(b) Explain any one fiber fabrication process with neat diagram. Compare the different methods of fabrication.

(10 marks) 935

Q4(a) Derive an expression for Link Power Budget analysis of optical fiber.

(10 marks) 962

Q4(b) Explain principle of working of APD photo detector.

(5 marks) 964

Q4(c) Define Self phase modulation.

(5 marks) 00

Q5(a) Explain SONET architecture in detail.

(10 marks) 970

Q5(b) Explain important network management functions to the operations of the Network.

(10 marks) 941

Q6) Short notes on:(Attempt any four)

a) Fiber Bragg grating
b) WDM network and architecture 973
c) Four wave mixing
d) Optical Access Network 975
e) OTDM
974

(20 marks)

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