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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.


Papers
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Proceedings ArticleDOI
10 Feb 2006
TL;DR: In this paper, the authors proposed changes in the original interferometer diagram, adding some elements that can helps to achieve a bigger sensibility, accuracy and reduction of noise, which can be used to detect phase changes of up to 0.1 nm with area of 0.025 m2.
Abstract: Most of the investigations that exist about the interferometer of Sagnac in our days, are made through fiber optic, which has the great advantage of having a big area size in very little space wound in a nucleus. The first interferometers of Sagnac, were used for very big angular speeds measures, it didn't have the advances to carry out detections of small signs, because the measurements systems like photo-detectors, amplifiers, filters, etc. didn't have the capacity of the systems that now exist. That is one reason that our experiments are based on the electronic advances, to make detections of phase changes of until less than 0.1 nm with area of 0.025 m2. Besides we proposed changes in the original interferometer diagram, adding some elements that can helps to achieve a bigger sensibility, accuracy and reduction of noise. Another of the advantages of use an interferometer of Sagnac, is work directly with the beams that travel through it, because we can observe the behavior from the optic road to external physical effects, like angular velocity or speed and little movements.
Patent
26 Jul 1996
TL;DR: In this article, phase errors that occur when a dithered ring laser gyroscope enters its deadband are measured, and a correction is applied to the output of the ring LM to compensate for these phase errors.
Abstract: Phase errors that occur when a dithered ring laser gyroscope enters its deadband are measured, and a correction is applied to the output of the ring laser gyroscope to compensate for these phase errors. The counter-propagating beams in a ring laser gyroscope are heterodyned to produce a pair of quadrature heterodyne signals that indicate the angular output of the laser ring laser gyroscope. The phase angle error between one of the heterodyne signals and either the sum or difference of the separate beam intensities is determined, The phase angle error signal is used to produce a control signal for adjusting the output of the ring laser gyroscope to correct for errors introduced at or near turnarounds in the dither cycle.
Patent
07 Dec 2016
TL;DR: In this article, the authors proposed a universal type online measuring device for laser gyroscope reflectors, which consists of a laser cavity, optical cement cushion blocks, reflection reduction mirrors and sealing reflectors.
Abstract: The invention belongs to the technology of reflector online detection and particularly relates to a universal type online measuring device for laser gyroscope reflectors. The universal type online measuring device comprises a laser gyroscope cavity, optical cement cushion blocks, reflection reduction mirrors and sealing reflectors. The laser gyroscope cavity comprises a cathode, an anode, gas storage holes and capillary pores. The two optical cement cushion blocks are symmetrically arranged on the two sides of a certain gas storage hole to be measured, internal through holes of the optical cement cushion blocks are communicated with the gas storage hole to be measured through inclined through holes, the reflection reduction mirrors are arranged on optical cement surfaces perpendicular to the internal through holes of the optical cement cushion blocks, and the sealing reflectors are arranged on the rest of the gas storage holes. When the device carries out measurement, a testing laser passes through the reflection reduction mirrors, the inclined through holes and the reflector to be detected on one side and the inclined through hole and the reflection reduction mirrors on the other side in sequence, the information of the exit laser is detected in real time, and the real-time change of the performance of the reflector to be measured can be obtained. The device can effectively relieve the influence of plasma on the performance of the reflection reduction mirrors and ensure the accuracy of measurement results, makes high-precision optical processing easy and is high in universality.
Journal ArticleDOI
09 May 2023-Sensors
TL;DR: In this article , double period modulation and triple period modulation (TPM) were proposed to compensate for the error of the gyroscope when the error is uncertain, which can achieve an improvement of about 95% in bias stability.
Abstract: The performance of a gyroscope is directly affected by the fluctuations in the light source power (LSP) in an interferometric fiber-optic gyroscope (IFOG). Therefore, it is important to compensate for fluctuations in the LSP. When the feedback phase generated by the step wave completely cancels the Sagnac phase in real-time, the error signal of the gyroscope is linearly related to the differential signal of the LSP, otherwise, the error signal of the gyroscope is uncertain. Herein, we present two compensation methods to compensate for the error of the gyroscope when the error is uncertain, which are double period modulation (DPM) and triple period modulation (TPM). Compared with the TPM, DPM has better performance, but it increases the requirements for the circuit. TPM has lower requirements for the circuit and is more suitable for small fiber- coil applications. The experimental results show that, when the frequency of the LSP fluctuation is relatively low (1 kHz and 2 kHz), DPM and TPM do not differ significantly in terms of performance; both of them can achieve an improvement of about 95% in bias stability. When the frequency of the LSP fluctuation is relatively high (4 kHz, 8 kHz and 16 kHz), DPM and TPM can achieve about 95% and 88% improvement in bias stability, respectively.
Proceedings ArticleDOI
08 May 2022
TL;DR: In this article , an anti-parity-time-symmetric gyroscope with two resonant cavities, indirectly coupled via an auxiliary bus, was designed for angular velocity sensing.
Abstract: Optical gyroscopes, which exploit the Sagnac effect, are one of the preferred choices for high-resolution sensing of angular velocity. However, their miniaturization and integration for high-resolution sensing is still a challenge in optoelectronics research. In fact, in interferometric fiber-optic gyroscopes (IFOGs) the sensitivity is proportional to the area enclosed by the fiber-optic sensing coil. Whereas, in resonant fiber-optic gyroscopes (RFOGs) and resonant micro-optical gyroscopes (RMOGs) the sensitivity is proportional to the ratio between the area enclosed by the cavity and the perimeter of the cavity. Non-Hermitian optical architectures (especially with parity-time-symmetric Hamiltonians) have been recently proposed in literature to solve this scaling problem. In this work, an anti-parity-time-symmetric gyroscope has been designed with two resonant cavities, indirectly coupled via an auxiliary bus. At the operating condition of the so-called "exceptional point", it is possible to demonstrate that the sensitivity of the gyroscope is independent of the dimensions of the device. Finally, it will be shown that the anti-parity-time-symmetric architectures represent a better choice for angular velocity sensing than the parity-time symmetric version. An enhancement of the sensitivity of several orders of magnitude with respect to standard Sagnac-based gyros with the same footprint is expected.

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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202347
202275
202130
202062
201963
201841