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.

General relativistic electromagnetic effects in transmission-line gyroscopes

Abstract: A closed loop of parallel-wire or coaxial transmission line is shown to be a suitable system for observing the interaction of an electromagnetic field with certain types of general relativistic field. Such a device constitutes a transmission-line gyroscope and, in common with other forms of ring gyroscope, may be conveniently analysed by the method of conjugate functions. When operated resonantly with a propagating electromagnetic field, the transmission-line gyroscope represents a generalised form of ring-laser device in which photon number as well as phase effects are observable.

High accuracy ring laser interferometer using an external cavity ring laser

Abstract: An optical sensing apparatus for use in a ring laser interferometer measuring a physical quantity of an object includes a ring laser cavity formed by several internal mirrors, of which at least two internal mirrors are partly light-transmitting. The ring laser cavity generates two laser beams of an identical wavelength, the two laser beams propagating in counter direction to each other in the ring laser cavity. External mirrors are disposed at a distance from the ring laser cavity, whereby portions of the two laser beams, which pass through the internal mirrors and travel on optical paths toward the external mirrors, are reflected back into the ring laser cavity. The apparatus further includes at least one platform for mounting the external mirrors.

System and method for improving the resolution of an optical fiber gyroscope and a ring laser gyroscope

Abstract: A system and method for improving the resolution of an optical fiber gyroscope and a ring laser gyroscope is provided. Entangled photons are introduced into an interferometer of a gyroscope. One or more detectors detect an interference pattern used to determine the angular velocity of a platform. The interference pattern may be a spatial and/or temporal interference pattern. The detectors may count the sub-wavelength interferometer fringes that indicate the direction and degree of angular rotation about the central axis of the apparatus. The detectors may measure a beat frequency.

Mechanical-electrostatic coupling research for MEMS line vibration gyroscope

Abstract: MEMS line vibration gyroscope is one of the most extensive applications of the MEMS gyroscope now. Its driving mode is always the electrostatic. When the MEMS line vibration gyroscope works in normal mode, its mass is vibrated in line at one direction (it is x direction here) and detected the rotation speed at other direction ( it is y direction here) in horizontal. At this time, the mass is in balance at y direction. But when the configuration of the MEMS line vibration gyroscope is not asymmetry, the electrostatic that putted on the mass at y direction is destroyed. So the mass is vibrated in line at y direction. The MEMS line vibration gyroscope will couple the rotation speed of x direction and produce zero signals because of this movement. Aim at this phenomenon, the mechanical-electrical error model because of the asymmetry of the configuration of the MEMS line vibration gyroscope is built. There is simulation analysis by using Matlab. And according to the method of Limited Element, the distributing fig of the electric field and the electrostatic force because of the asymmetry of the configuration is got by using ANSYS. These researches act important effect on improving the precision of the MEMS line vibration gyroscope.

Resonant optical gyroscope with ‘reflector’: analysis and simulations

Abstract: We propose using theoretical analysis and simulations, a gyroscope that uses a ring resonator with a reflecting element. The proposed structure utilizes the rotation induced Sagnac shift along with the inherent coupling between the clockwise and counter clockwise waves to produce changes in the reflected intensity that vary linearly with rotation. Shot noise limited sensitivities of 0.01 deg/h are shown possible for rings of radius 10 cm. While traditional resonant fiber optic gyroscopes require very careful control of the power difference of two oppositely circulating waves derived from an expensive laser of linewidth about 5–10 kHz using special components, our scheme should allow the use of a laser source with linewidth of about 500 kHz to achieve similar performances, without the requirement of additional components.