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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.