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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/10129

Title: CHARACTERIZATION AND OPTIMIZATION OF GAIN MEDIUM IN A RING LASER GYROSCOPE
Authors: LEKSHMI A
Keywords: Photonics
M.Tech Phiotonics Project Reports
GAIN MEDIUM
LASER GYROSCOPE
RING LASER
Issue Date: Dec-2014
Abstract: With the advent of the laser, rotation sensing is possible in the frame of the laser, thus allowing the device to be attached directly to the vehicle, and avoiding the need for gimbals. He Ne laser based Ring Laser Gyroscope are advance inertial navigation sensors based on the principle of Sagnac Effect. These are highly sensitive and accurate. The gain provided by He Ne discharge is the fundamental parameter for the performance of the laser gyroscope. Gain (or amplification) in laser physics is a process, where the medium transfers part of its energy to the emitted electromagnetic radiation, resulting in an increase in its power. Its theoretical understanding and characterization is utmost necessary for successful operation and desired performance of RLG. Theoretical modeling of gain is done by using the rate equation for He Ne laser system with corresponding boundary conditions. It depends on total gas pressure, He Ne ratios and pump power etc. It needs extensive experiments to optimize the various parameters that characterize the gain. Theoretical modeling is required to minimize the experimental iterations and also to draw the boundaries at which experimental work has to be done. A method based on calculating the change in power of an incoming beam after passing through plasma is employed to measure the gain and its radial distribution for different electrode profiles at optimal pressure and ratio and pump power. The resulting gain and its distribution are found to be matching with our theoretical calculations and earlier measured literature values. Hence both theoretical analysis and experimental methods are utilized to optimize the various parameters that characterize the gain.
URI: http://hdl.handle.net/123456789/10129
Appears in Collections:M.Tech Photonics Project Reports

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