GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University
Total Marks: 70
Seat No.:
Enrolment No.
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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- VII (New) EXAMINATION - WINTER 2019
Subject Code: 2173904
Subject Name: Photonics
Time: 10:30 AM TO 01:00 PM
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Date: 03/12/2019Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| Q.1 | (a) What is Electroluminescence? Write its Applications. | 03 |
| (b) Write Short note on Nanobiophotonics. | 04 | |
| (c) Write Applications of Optical Fiber. | 07 | |
| Q.2 | (a) Describe Applications of Photo-Detectors. | 03 |
| (b) Explain Working of P-N Junction Solar cells. | 04 | |
| (c) Explain Photonic Crystals. | 07 | |
| OR | ||
| (a) Explain Working of Rubby laser and mention its Applications. | 07 | |
| Q.3 | (a) Define Photonic Band Gap. | 03 |
| (b) Explain Radiation Pressure. | 04 | |
| (c) Write and Explain Maxwell’s Equations for-Vacuum and Matter. | 07 | |
| OR | ||
| (a) What is E-k Diagram What does it Signifies? | 03 | |
| (b) Write a Short note on Laser Surgery. | 04 | |
| (c) Describe Electro Optic and Magneto Optic Devices. | 07 | |
| Q.4 | (a) What is Double Refraction? What is polarizer? | 03 |
| (b) Explain Working of He-Ne Laser and Mention its Applications. | 04 | |
| OR | ||
| (c) Describe Faraday Effect. | 07 | |
| Q.5 | (a) Explain the Terms - Polarization of light, Interference of light, Dispersion of light and Modulation of light. | 03 |
| (b) Explain Behavior of Electromagnetic Wave in different Media. | 04 | |
| (c) Describe Electro-Optic Kerr Effect. | 07 | |
| OR | ||
| (a) Write note on Opto-Electronic Tweezers. | 03 | |
| (b) Compare Three Level and Four Level Laser Systems. Which is Better and Why? | 04 | |
| (c) Give Applications of Faraday Effect. Write a Short note on Plasmon. Write Applications of Laser. | 07 |
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