Download GTU BE/B.Tech 2019 Winter 7th Sem New 2173904 Photonics Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 7th Sem New 2173904 Photonics Previous Question Paper

Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? VII (New) EXAMINATION ? WINTER 2019
Subject Code: 2173904 Date: 03/12/2019

Subject Name: Photonics
Time: 10:30 AM TO 01:00 PM Total Marks: 70

Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.


MARKS

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
(c) 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
Q.3 (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? 03
(b) What is polarizer? 04
(c) Explain Working of He-Ne Laser and Mention its Applications. 07
OR
Q.4 (a) Describe Faraday Effect. 03
(b) Explain the Terms - Polarization of light, Interference of light,
Dispersion of light and Modulation of light.
04
(c) Explain Behavior of Electromagnetic Wave in different Media. 07
Q.5 (a) Describe Electro-Optic Kerr Effect. 03
(b) Write note on Opto-Electronic Tweezers. 04
(c) Compare Three Level and Four Level Laser Systems. Which is Better
and Why?
07
OR

Q.5 (a) Give Applications of Faraday Effect. 03
(b) Write a Short note on Plasmon. 04
(c) Write Applications of Laser. 07

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