Anna University Chennai 2010-7th Sem B.E Electrical and Electronics Engineering /B.Tech emr/emr , ester, , EI1001-FIBRE OPTICS AND LASER INSTRUMENTS - Question Paper

B.E/B.Tech Degree exam November/December 2010,
Seventh Semester,
Electrical and Electronics Engineering,
EI1001-FIBRE OPTICS AND LASER INSTRUMENTS
ans all the ques..

Part-A
(10*2=20)
1. State the advantages of optic fibre.
2. What is acceptance angle?
3. Mention the applications of fibre optic sensor.
4. Define Moire fringes.
5. What are the properties of LASER?
6. What is cavity damping?
7. What is LASER heating?
8. Define Vaporization.
9. What are holographic components?
10. List the medical applications of LASER.

Part-B
(5*16=80)
11.(a)(i) discuss step and Graded index fibre. (8)
(ii) Write a note on intrinsic and extrinsic absorption. (8)
Or
11.(b)(i)Discuss linear and non-linear scattering. (8)
(ii) discuss the characteristics of optical sources and detectors. (8)

12.(a)(i) define the fibre optic instrumentation system for the measurement of strain. (8)
(ii) discuss various kinds of modulators used in fiber optic instrumentation system. (8)
Or
12.(b)(i) discuss the principle of interferometric method of measurement of length. (8)
(ii) discuss the method of measurement of temperature using fibre optic sensors. (8)

13.(a)(i) define LASER modes. (8)
(ii) discuss Q-switching and Mode locking. (8)
Or
13.(b) With neat diagram discuss the working of liquid and semiconductor laser. (8+8)

14.(a) define the method for the measurement of
(i) Acceleration and
(ii) Current
Or
14.(b) discuss the industrial application of LASER in material processing. (16)

15.(a)(i) explain holography for non-destructive testing. (8)
(ii) define the LASER instruments for surgery and removal of tumors of vocal cards. (8)
Or
15.(b)(i) discuss holography in detail. (8)
(ii) discuss the medical applications of LASER in gynecology and oncology. (8)

Earning:   Approval pending.