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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TL;DR: In this paper, the thermal stress-strain state in the vicinity of the electrical input in an annular laser is simulated during its manufacture and use, and a new manufacturing technology for the optical contacts and a method of localizing the temperature deformation are proposed.
Abstract: The thermal stress-strain state in the vicinity of the electrical input in an annular laser is simulated during its manufacture and use. Analysis permits the proposal of a new manufacturing technology for the optical contacts and a method of localizing the temperature deformation.
01 Jan 1996
TL;DR: In this paper, Litton's zero-lock ring laser gyro (ZLG) technology is used for pointing and tracking, pinpoint strikes, and accurate target discrimination, and some preliminary test data from a couple of novel configurations for ZLG are presented.
Abstract: Changing world politics and the advent of the GPS have resulted in a growing need for very compact guidance and control instruments designed for precision pointing and tracking, pinpoint strikes, and accurate target discrimination. Requirements for these systems are not compatible with conventional dithered ring laser gyro technology and are too stringent in terms of random walk vs size for any projected fiber optics systems. However, Litton's Zero-Lock ring laser gyro (ZLG) technology, with its mechanically quiet environment and high resolution capabilities, is well matched to this growing arena of applications. We present design details and some preliminary test data from a couple of novel configurations for our ZLG. These designs both package three nonplanar light rings with orthogonal sensing axes into a single easy-to-manufacture glass block, in one case using only four mirrors for all three axes. Using recent advances in our coating technology, we are able to simplify the biasing arrangement for these three-axis systems, and with careful discharge layout we have reduced instrument volume considerably. Test data from an 11-cm path length frame show excellent random walk and scale factor performance with high resolution output. (Author)
01 Feb 1992
TL;DR: In this paper, a theoretical and experimental treatment for the feedback-dependent intensity-noise characteristics of a laser diode used in a FOG was presented, where the feedback induces an additional, time-varying noise signal in the laser output which has the same waveform as the Sagnac signal, and is amplified by as much as 13 dB.
Abstract: A theoretical and experimental treatment is presented for the feedback-dependent intensity-noise characteristics of a laser diode used in a FOG. The feedback induces an additional, time-varying noise signal in the laser output which has the same waveform as the Sagnac signal, and is amplified by as much as 13 dB. The effect of this intensity noise in the output of a 2D frequency-division multiplexed gyro is to introduce two additional terms.© (1992) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
05 May 2019
TL;DR: In this paper, a chip-based Brillouin laser gyroscope with 0.068° / h angular random walk and 3.6° /h bias stability is presented.
Abstract: We report a chip-based Brillouin laser gyroscope with 0.068° / h angular random walk and 3.6° /h bias stability. The device can resolve sinusoidal rotations with amplitude as low as 5° /h and is also used to measure the Earth's rotation. © 2019 The Author(s)
26 Dec 2007
TL;DR: In this paper, two auto-regressive exogenous (ARX) models are used to identify both dither and angular velocity sensor include in dithering system and the parameters of each ARX model are estimated using least squares estimation method.
Abstract: A filtering based dither-stripping technique for ring laser gyroscopes (RLGs) requires a more reasonable mathematical model of dithering system which is used for the design of model based adaptive filters to estimate the dither signal more robustly and accurately. To this end, this paper presents dithering system model identification results. Considering measurement errors and model uncertainties, two auto-regressive exogenous (ARX) models are used to identify both dither and angular velocity sensor include in dithering system and the parameters of each ARX model are estimated using least squares estimation method. The identified model is validated via several experiments. The validation results show that the identified model is reasonable in a wide range of operation such that they can be used to design model based adaptive filters for filtering-based dither-stripping of dithered RLGs.