M.Sc. DEGREE EXAMINATION, NOVEMBER 2017
Second Semester
Electronics
Elective — FIBER OPTICS AND LASER INSTRUMENTS
(CBCS 2015 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 x 2 20)
Answer all questions.
1. Differentiate intrinsic and extrinsic fiber optic sensor.
2. Classify the different types of modulators.
3. What are the properties of LASER?
4. State the advantages of using laser in industry.
5. Classify the common types of lasers used for material
processing.
6. What are the features of laser melting?
7. Describe the components of hologram.
8. Discuss the principle involved in holographic inferometry.
9. Distinguish between oncology and gynecology.
10. List any two advantages of laser surgery.
Sub. Code
5MEL2E2
AFF-5067
2
Ws15
Part B x 5 25)
Answer all questions.
11. Explain the block diagram of basic optical fiber
sensor system.
Or
Explain the construction and working of two arm
single mode fiber interferometric sensor.
12. Explain how the distance is measured using laser.
Or
Explain how the laser is used to measure velocity.
13. List any two different modes of laser welding
process.
Or
List the industrial lasers and its application.
14. Explain about construction and reconstruction of
hologram.
Or
Explain about non destructive testing using
holography.
15. Explain about laser interaction with tissue.
Or
Assess how laser is used for removal of tumours of
vocal cards.
AFF-5067
3
Ws15
Part C 10 30)
Answer any three questions.
16. Give the theory of fibre optic modulators and discuss its
advantages.
17. Obtain the method of atmospheric effect using optic fibre.
18. Explain laser heating process in detail.
19. List and explain the conditions during reconstruction
methods of holographic inferometry.
20. Describe the applications of laser in brain surgery.