Article,

The ring laser gyro

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Reviews of Modern Physics, 57 (1): 61+ (January 1985)
DOI: 10.1103/revmodphys.57.61

Abstract

This paper presents a review of both active and passive ring laser devices. The operating principles of the ring laser are developed and discussed; with special emphasis given to the problems associated with the achievement of greater sensitivity and stability. First-principle treatments of the nature of quantum noise in the ring laser gyro and various methods designed to avoid low-rotation-rate lock-in are presented. Descriptions of state-of-the-art devices and current and proposed applications (including a proposed test of metric theories of gravity using a passive cavity ring laser) are given.

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