Jawaharlal Nehru Technological University Anantapur 2012-2nd Year B.Tech Electronics and Communications Engineering IV semester (R07) Regula & Supplementary s, c/il , Optical Communications, set3 - Q

code: R7420401 set 3

IV year II semester (R07) Regula & Supplementary Examinations, Marc/April 2012, Optical Communications
Time:3hrs Max marks:80
ans any 5 ques.
All ques. carry 16 marks

1(a) elaborate the advantages of Optical Communications? And also discuss the hisorical development of Optical communications.
1(b) discuss the subsequent (i) Skew rays (ii) step index

2 explain the mode theory of circular wave guides.

3(a) What is meant by wave guide dispersion and derive an expression.
3(b) discuss about PMD.

4(a) what is meant by fiber splicing and discuss various kinds of it.
4(b) discuss about reliability of LED and ILD.

5 provide an account on the optical confinement of LASERS.

6(a) With neat diagram discuss principle operation of PIN optical detector.
6(b) discuss various Digital signal transmission techniques in detail.

7 discuss in detail optical multiplexing in OSD.

8 discuss the follwing:
(a) Numerical aperture.
(b) Bending Losses.
(c) Eye trend

Earning:   Approval pending.