Topic
Ring laser gyroscope
About: Ring laser gyroscope is a research topic. Over the lifetime, 2070 publications have been published within this topic receiving 18609 citations. The topic is also known as: Sagnac interferometer.
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Patent•
03 Apr 2013
8 citations
TL;DR: In this paper, the behavior of a gyroscope at rest in the TT-grid of a gravitational plane wave is analyzed, and it is shown that spatial frames adapted to the observer can be selected in order to have a precession which is dominated (to first order in the dimensionless amplitude h of the wave) only by one polarization state.
Abstract: The behaviour of a gyroscope at rest in the TT-grid of a gravitational plane wave is analysed. It is shown that spatial frames adapted to the observer carrying the gyroscope (with respect to which the precession must be measured) can be selected in order to have a precession which is dominated (to first order in the dimensionless amplitude h of the wave) only by one polarization state of the wave, giving the gyroscope a sort of filtering property. The discussion is then generalized to the case of a gyroscope in generic geodetic motion in the same background.
8 citations
TL;DR: A typical gyroscope measures angular rotation around a fixed axis, whereas the proposed design can sense simultaneous rotation about two orthogonal axes using a mathematical model based on Jones matrix methodology.
Abstract: In this paper, design of a resonator fiber-optic gyroscope comprised of a single laser source and two optical fiber resonator rings is presented. A typical gyroscope measures angular rotation around a fixed axis, whereas the proposed design can sense simultaneous rotation about two orthogonal axes. Two variants of the design are proposed and analyzed using a mathematical model based on Jones matrix methodology.
8 citations
15 Feb 1990
TL;DR: In this article, two fiber laser sources, a resonant fiber laser and a superfluorescent fiber laser (SFL), have been given initial tests as gyro sources using a medium quality gyro test bed.
Abstract: Two fiber laser sources, a resonant fiber laser (RFL) and a superfluorescent fiber laser (SFL), have been given initial tests as gyro sources using a medium quality gyro test bed. The RFL reacted strongly to optical feedback from the gyro circuit resulting in very large unstable errors in the gyro output. These were suppressed substantially by an optical isolator which reduced feedback from the gyro, or by a phase modulator within the laser cavity. The SFL was found to be free of errors of this type when operated at output power levels below a threshold level (about 0.5 mw) for self oscillation due to external optical circuit reflections.
8 citations
Patent•
20 Apr 1989
TL;DR: In this article, a method and apparatus for aligning the light path of a square ring laser gyroscope is described, where the alignment method includes directing two input beams of light into the cavity of the gyro-scope and then measuring the extinction ratios of the first and second output beams at the exit mirror.
Abstract: A method and apparatus for aligning the light path of a square ring laser gyroscope wherein the alignment method includes directing two input beams of light into the cavity of the gyroscope. Next, the input beams are intercepted prior to their incidence upon the input mirror with a pair of polarizers. Subsequently, the extinction ratios of the first and second output beams of light are measured at the exit mirror. The curved mirrors of the gyroscope are then translated in opposite directions and equal amplitude so as to change the extinction ratios of the output beams. Such translations are repeated until the measured extinction ratios are substantially equal.
8 citations