Optical Fibre Communication Question Paper - Dec 17 - Electronics Engineering (Semester 7)

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yashbeer ★ 11k

Optical Fibre Communication - Dec 17

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 (any 4)

1(a) Define Snell's law and NA?

(5 marks) 1200

1(b) Compare LED and LASER

(5 marks) 1227

1(c) With the help of neat sketch, explain the working of optical isolator

(5 marks) 1244

1(d) Compare SOA and EDFA

(5 marks) 00

1(e) Explain the concept of power penalty in optical network

(5 marks) 1295

1(f) Components of Typical WDM Link

(5 marks) 1288

2(a) What are the reliability considerations that the designer of optical source has to consider on OFC?

(10 marks) 00

2(b) What do mean by optical waveguide? How different from electrical waveguide? A silica optical fiber with core diameter large enough to be considered by ray theory has a core refractive index of 1.5 and cladding refractive index of 1.47. Determine

(i) The critical angle
(ii) The NA
(iii) The Acceptance Angle

(10 marks) 1205

3(a) Explain the basic principle of operation of photo detector. Explain the working of PIN Diode.

(10 marks) 1232

3(b) What is the significance of "V" number? Get an expression for it in term of Numerical Aperture.

(10 marks) 1203

4(a) Generic configuration of typical SONET or SDH Network. What are the Network Categories? Give the names of public Network established.

(10 marks) 1291

4(b) What are the different types of fiber grating? Briefly explain the working of each type.

(10 marks) 00

5(a) What is the Principle of OTDR Operation? Explain the method of Attenuation measurement using OTDR.

(5 marks) 1251

5(b) What is the Basic PON Architecture? Write note on IP over DWDM.

(10 marks) 00

Q6) Write short note on (any 4)

6(a) Raman Amplifier

(5 marks) 00

6(b) Modified Chemical Vapour Deposition (MCVD) method of fiber fabrication

(5 marks) 1213

6(c) Fabry Perot Filter

(5 marks) 1228

6(d) Network management functions & Fault management

(5 marks) 1297 1299

6(e) Connectors used in optical fiber communication

(5 marks) 1217

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