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1997 Course Fiber Optic Communication

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Total No. of Questions : 10] P1339 [Total No. of Pages : 3 [3664]-36 B.E. (E & TC) FIBER OPTIC COMMUNICATION (1997 Course) (404191) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answer any 3 questions from each Section. 2) Answers to the two sections should be written in separate books. 3) Neat diagrams must be drawn wherever necessary. 4) Figures to the right indicate full marks. 5) Use of logarithmic tables, slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. 6) Assume suitable data, if necessary. SECTION - I Q1) Give reasons for the following: [16] a) The manufacturer specifies RL when characterizing the bandwidth of a photodiode. b) Optical fiber cable manufacturer specify bending losses in dB but not in dB/km. c) Laser diodes present more problems to the circuit designer than LED s. d) Light from usual light sources is in co-herent. Q2) What are the requirements of: [16] a) Sources for optical communication. b) Good connector design. c) Detectors for optical communication. d) Optical fibers for communication. P.T.O.

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