Optical Fibre Communication Question Paper - May 16 - Electronics Engineering (Semester 7)

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yashbeer ★ 11k

Optical Fibre Communication - May 16

Electronics Engineering (Semester 7)

Total marks: 80
Total time: 3 Hours INSTRUCTIONS
(1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Draw neat diagrams wherever necessary.

Q1) Attempt the following Questions (any4)

1(a) Total Internal Reflection at the outer edge of the core-cladding?

(5 marks) 1200

1(b) What do you mean by LP (Linearly Polarized) wave, State difference between LP & circularly polarized wave?

(5 marks) 00

1(c) Discuss basic block Diagram of Optical communication.

(5 marks) 1198

1(d) Explain the different types of losses in optical fiber communication.

(5 marks) 1246

1(e) Compare Dark current & optical current in Semiconductor.

(5 marks) 00

1(f) What is Optical Transport network(OTN)

(5 marks) 00

2(a) Explain working of PIN photo diode, Advantages of APD w.r.t Gain, responsively of diode.

(8 marks) 1232

2(b) For GIF prove the $M= \frac{α}{((αT^2)) a^2 k^2 n_1^2 ∆}$

(6 marks) 00

2(c) Explain with the neat sketch the two categories of front end amplifiers, Discuss the possible sources of noise in optical fiber Receiver.

(6 marks) 1241

3(a) Explain the different types of losses in optical fiber communication, Give the various factors responsible for optical signal attenuation & Dispersion.

(8 marks) 1246

3(b) Explain dispersion losses in an optical fiber; How transmission rate calculated in dispersion.

(6 marks) 1248

3(c) Name five connectors used in optical fiber communication, state the difference between couplers and connectors.

(6 marks) 00

4(a) Define the quantum efficiency and responsivity of photo detector, Derive an expression for the responsivity of Intrinsic photo Detector.

(8 marks) 1234

4(b) Explain with block schematic of optical fiber soliton transmission system with optical soliton pulses

(i) collision of two solitons
(ii)Four stable solitons at safe separation distance.

(6 marks) 1290

4(c) Difference between following term in context with optical communication(i)Optical Source & Optical Detector (ii) Coherent and Non coherent optical transmission.

(6 marks) 1238

5(a) Describe the structure and operation of OTDR, Explain loss measurement by OTDR.

(8 marks) 1251

5(b) Explain the term protocol and Internet protocol(IP),using OSI reference model discuss implementation aspect of the

(i) SONET (ii) DWDM

(6 marks) 1289

5(c) Explain with components a typical WDM link and some performance measurement parameter of user interest.

(6 marks) 1288

Q6) Write a short notes on (any four):

6(a) Optical Coupler and Application

(5 marks) 1243

6(b) SNR & Modification of SNR for photodiode

(5 marks) 00

6(c) Optical safety & Service Interface

(5 marks) 1300

6(d) Optical Switches

(5 marks) 00

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