UNIT BASED ONLINE EXTERNAL EXAMINATION - NOVEMBER – 2020 - LASER PHYSICS AND FIBER OPTICS - 7BPHE1C - SLOT II

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ALAGAPPA UNIVERSITY
KARAIKUDI – 630 003
UNIT BASED ONLINE EXTERNAL EXAMINATION - NOVEMBER – 2020

FIFTH SEMESTER SLOT – II

LASER PHYSICS AND FIBER OPTICS 7BPHE1C

Total Marks: 25                                                                                  Time: 1.0 Hr

SECTION A – SHORT ANSWER - 5 x 2 = 10 Marks

ANSWER ALL THE QUESTIONS

1. Define holography.

2. What is meant by surface hardening?

3. Sketch the basic form of optical fiber.

4. Define numerical aperture.

5. State any three techniques of fiber fabrication.

 

SECTION B - DESCRIPTIVE - 3 x 5 = 15 Marks

ANSWER ANY THREE

6. Describe the applications of laser in mechanical industry.

7. Explain the technique of holography.

8. Discuss the propagation of light wave through an optical fiber.

9. Explain any five fiber losses.

10. Discuss the structure of step index and graded index fibers.