Laser Gyroscope: Difference between revisions
Created page with "Some Description ==Team members== Darren e0303300@u.nus.edu Wen Xin e0309271@u.nus.edu ==Idea== This project aims to measure some rotation by using the Sagnac effect. ==Setup== The main setup will be a fiber based sagnac intereferometer with detection of the output done using photodiodes. We are aiming to build everything in the 1550nm wavelength range. ==Measurements== ...." |
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==Idea== | ==Idea== | ||
This project aims to measure some rotation by using the Sagnac effect. | This project aims to measure some rotation by using the Sagnac effect, by using a loop of fiber as a ring interferometer. | ||
'''Sagnac effect''' | |||
When two beams of light are sent into the two ports of a ring interferometer, they travel clockwise (CW) and counter-clockwise (CCW) paths respectively. For a stationary ring interferometer, since the path length traversed by each beam is the same, this leads to complete constructive interference at the output port. | |||
Now let's say the interferometer is spinning in the CW direction. Then there will be a difference in path length by: | |||
<math> l_{CCW} = 2\pi R + \delta l, l_{CCW} = 2\pi R - \delta l </math> | |||
<math> \delta l = <math> | |||
==Setup== | ==Setup== | ||
Revision as of 10:37, 31 January 2025
Some Description
Team members
Darren e0303300@u.nus.edu
Wen Xin e0309271@u.nus.edu
Idea
This project aims to measure some rotation by using the Sagnac effect, by using a loop of fiber as a ring interferometer.
Sagnac effect When two beams of light are sent into the two ports of a ring interferometer, they travel clockwise (CW) and counter-clockwise (CCW) paths respectively. For a stationary ring interferometer, since the path length traversed by each beam is the same, this leads to complete constructive interference at the output port.
Now let's say the interferometer is spinning in the CW direction. Then there will be a difference in path length by:
<math> \delta l = <math>
Setup
The main setup will be a fiber based sagnac intereferometer with detection of the output done using photodiodes. We are aiming to build everything in the 1550nm wavelength range.
Measurements
....
