Question Paper: Optical Communication And Networks Question Paper - May 17 - Electronics And Telecomm (Semester 7) - Mumbai University (MU)
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Optical Communication And Networks - May 17

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 indicated full marks.

Q1(a) Compare Intramodal Dispersion and Intermodal Dispersion.
(5 marks) 944

Q1(b) Define Critical Angle, Acceptance Angle, Fresnel Reflection and External Reflection.
(5 marks) 920 925

Q1(c) Compare LED and LASER Sources.
(5 marks) 955

Q1(d) Differentiate DWDM and WDM Techniques.
(5 marks) 970

Q2(a) Explain OTDR working principle in detail.
(10 marks) 948

Q2(b) Derive an expression for Time Delay in Intermodal Dispersion.
(5 marks) 00

Q2(c) Calculate the number of modes at 1.3$\mu$m wavelength in GIF having index profile $\alpha$=2, core radius 25$\mu$m, core refractive index 1.48 and cladding refractive index 1.46.
(5 marks) 927

Q3(a) Sketch the Refractive Index Profile of SIF and GIF. Derive an expression for Numerical Aperture and Number of Modes in SIF.
(10 marks) 930 932

Q3(b) Explain any one Fiber Fabrication Technique.
(5 marks) 935

Q3(c) Compare Isolators and Circulators.
(5 marks) 972

Q4(a) Derive an expression for Link Power Budget Analysis of optical fiber.
(7 marks) 962

Q4(b) Derive an expression for Responsivity of PIN photodiode. Differentiate PIN and RAPD photodiodes.
(8 marks) 957

Q4(c) Explain Front End Amplifiers in optical communication.
(5 marks) 961

Q5(a) Explain OTDM in detail.
(10 marks) 974

Q5(b) Describe SONET/SDH in detail.
(10 marks) 970

Q6) Write short note on any two:-

  • a) Crosstalk
  • b) Dispersion 942

  • c) Optical Safety 982

  • d) Fault Management
    980

(20 marks)

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