Ring laser gyroscope | Wikipedia audio article
Channel: wikipedia tts
Date: 04/10/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Ring_laser_gyroscope


00:00:35 1 Description
00:02:33 2 Principle of operation
00:04:43 3 Fibre optic gyroscope
00:05:49 4 Example applications
00:07:28 5 See also



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SUMMARY
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A ring laser gyroscope (RLG) consists of a ring laser having two independent counter-propagating resonant modes over the same path; the difference in the frequencies is used to detect rotation. It operates on the principle of the Sagnac effect which shifts the nulls of the internal standing wave pattern in response to angular rotation. Interference between the counter-propagating beams, observed externally, results in motion of the standing wave pattern, and thus indicates rotation.