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.

The mathematical model and simulation of north-finder based on rate biased RLG

Abstract: In this paper, the basic principles of north-finder based on rate biased ring laser gyroscope (RLG), the mathematical model and the least square (LS) arithmetic are introduced. The measurement error of RLG (scale factor instability, bias instability, and random angle walk) and the angle measurement error of the platform are the major errors of the north-finder. Simulation analysis is performed to get their influence to the precision of the north-finder. Finally, an experiment is performed to test the mathematical model and the LS arithmetic.

Online testing device for performance of laser gyroscope reflector

Abstract: The invention belongs to the technical field of laser performance testing, and particularly relates to an online testing device for performance of a laser gyroscope reflector. The online testing device is obtained through performing mechanical processing, optical processing and chemical polishing on microcrystalline glass material with a cube structure. The body is a straight prism chamber with a decahedron structure. The bottom surface of the straight prism is an octagon of which each inner corner is 135 DEG, and the middle part is provided with a central through hole of which the diameter is 50mm. A spherical surface output mirror, an anode 1, a chamber translation mirror, a cathode, a planar output mirror, an anode 2, a spherical surface total reflection mirror and a blank surface are successively arranged on six side surfaces of the straight prism. Two sides of the planar output mirror and two sides of the spherical surface output mirror are provided with four light windows. After a power supply is switched on, the online testing device for the performance of the laser gyroscope reflector starts to operate. An area which extends from the anode 1 to the anode 2 through the cathode in the straight prism chamber is a discharging area. A He-Ne laser output with a wavelength of 632.8nm is generated on the spherical surface output mirror and the planar output mirror, thereby observing performance change condition of the laser gyroscope reflector in real time.

Systems and methods for packaging and mounting readout and laser intensity monitor sensors

Abstract: Methods and apparatus for applying sensors to a ring laser gyro. An example apparatus includes a housing having a cavity, a laser intensity monitor (LIM) sensor mechanically and electrically connected within the cavity of the housing, and a readout sensor mechanically and electrically connected within the cavity of the housing. The LIM sensor and readout sensor are connected within the housing based on predetermined light output properties of a sensor mirror of a ring laser gyro. When the readout sensor is properly aligned with the sensor mirror, then the LIM sensor is automatically aligned with the sensor mirror.

Study on two-axis resonant fiber optic gyroscope using single source

Abstract: A resonant fiber optic gyroscope (RFOG) that senses rotation in two orthogonal directions has been proposed. It consists of a single laser source and two resonant fiber rings. Mathematical and simulations results have been presented.

Examination of the quality of 120 degree silicon double mirror for a micro-optical laser gyroscope

Abstract: 120° silicon double mirrors for use in a novel micro optical resonator laser gyroscope have been developed in order to maximize the robustness of the sensor design against alignment errors. The idea being pursued is that the angle between these two mirrors can be intrinsically defined by silicon crystallography which enables a well-defined resulting reflection angle that is robust against mirror misalignment. As a consequence, resonator losses resulting from misalignment can be minimized. This work describes the concept of a new type of optical micro-gyroscope with double mirrors and its design. The mirrors are made from silicon wafers which are slightly deviating from perfect (100) orientation and thus allow to create facets oriented 60° against the surface instead of 54,7° by wet etching. Two likewise structured wafers are connected by silicon direct bonding and separated into double mirror elements. These elements are mounted on a test platform to assess the quality and to confirm the suitability of a gyroscope. In this setup various possible misalignments were simulated. The experiments confirm the predicted misalignment robustness.