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

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 light sources.

2. What is splicing?

3. What are the desired qualities of photodetectors?

4. Define modulation bandwidth of LED.

5. What are optical couplers?

SECTION B - DESCRIPTIVE - 3 x 5 = 15 Marks

ANSWER ANY THREE

6. Describe the types of photodetectors.

7. Briefly explain communication systems.

8. Explain various parameters of fiber cables.

9. What is OTDR?

10. Discuss repeaters with a block diagram.