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•
21 Jul 2020
TL;DR: In this paper, a three-axis laser gyroscope (TLG) was used to determine non-orthogonality of the axes of sensitivity of a TLG.
Abstract: FIELD: physicsSUBSTANCE: invention relates to the field of gyroscopic instrument-making Essence of the invention consists in that the method of determining non-orthogonality of the axes of sensitivity of a three-axis laser gyroscope (TLG) comprises steps of setting the TLG onto a faceplate in an arbitrary position After the corresponding gyroscope sensitivity axes are displayed orthogonal to the table axis rotation axis, wherein said axes position is characterized by zero projections of angular increments measured by said two axes of sensitivity at successive turns of faceplate in opposite directions (for compensation of Earth rotation) Then round table is additionally inclined at angle π/2 relative to initial position and successively turned in opposite directions (clockwise and counterclockwise) by fixed angle, and value of non-orthogonality between corresponding sensitivity axes is calculated from mathematical ratioEFFECT: technical result is high accuracy of determining non-orthogonality of sensitivity axes of TLG1 cl, 1 dwg
Patent•
29 Jul 1994
TL;DR: The focusing polarization rotator as discussed by the authors is a wedge-shaped lens made from either a magneto-optic transparent material with a magnetic field within the lens or a material having different indices of refraction for left and right-circularly polarized light.
Abstract: The invention is a focusing polarization rotator for use in the resonant mirror system of a ring laser gyroscope. The focusing polarization rotator accomplishes the traditional task of rotating the plane of polarization of a light beam that passes through it and at the same time performs a focusing function on the light rays. In a resonant mirror system, the device acts to constrain the transverse dimensions of light beams that follow the closed light-beam path established by the resonant mirror system thereby obviating the need for one or more curved mirrors that usually perform this function. The focusing polarization rotator is a wedge-shaped lens made from either a magneto-optic transparent material with a magnetic field within the lens or a material having different indices of refraction for left- and right-circularly-polarized light. The wedge shape of the lens greatly improves the bias stability of the RLG in which it is used.
27 Mar 2022
TL;DR: In this article , a relative intensity noise suppression scheme for high-precision fiber optic gyroscope is designed, which adjusts the modulation depth to make the two light intensities match all the time.
Abstract: A relative intensity noise suppression scheme for high-precision fiber optic gyroscope is designed. The technical scheme of this letter can effectively suppress the influence of RIN on the detection accuracy of high-precision fiber optic gyroscope, and has simple structure and low cost. By adjusting the modulation depth to make the two light intensities match all the time, the fiber optic gyro can maintain the optimal suppression effect on the relative intensity noise and improve the gyro accuracy.
31 Jan 2023
TL;DR: In this paper , the authors look at alternative rotation sensing concepts and their physical realization, and illustrate how the purpose ultimately defines the best technical solution, and show that in terms of sensitivity and stability, the large ring laser gyroscope takes a prominent role in inertial rotation sensing.
Abstract: Ring lasers are not the only devices that allow rotation sensing with high resolution. This chapter looks at alternative rotation sensing concepts and their physical realization, to put the achievements reported in Chapters 3 and 4 into perspective. We briefly introduce passive Sagnac interferometers, small and large fiber optic gyros, helium SQUID gyros, atom interferometry and Coriolis force-exploiting sensors. It turns out that every application has a different set of requirements, and some types of sensors are better suited for the respective purposes than others. Here we illustrate how the purpose ultimately defines the best technical solution. A book like this would not be complete without looking at solid state ring lasers. However, we also show that in terms of sensitivity and stability, the large ring laser gyroscope takes a prominent role in inertial rotation sensing.
03 Oct 2022
TL;DR: In this paper , the authors demonstrate that for an optical resonance gyroscope with normal dispersion, the measurement sensitivity can be increased by two orders of magnitude through coupling into a squeezed vacuum light.
Abstract: Optical gyroscope based on the Sagnac effect have excellent potential in the application of high-sensitivity inertial rotation sensors. In this paper, we demonstrate that for an optical resonance gyroscope with normal dispersion, the measurement sensitivity can be increased by two orders of magnitude through coupling into a squeezed vacuum light, which is different from that in the classical situation. When the system is operated under critical anomalous dispersion condition, injecting a squeezed vacuum light allows the measurement sensitivity beyond the corresponding standard quantum limit by five orders of magnitude, with a minimum value of 3.8*10^-5 Hz. This work offers a promising possibility for developing optical gyroscopes that combine high sensitivity with tiny size.