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.

Vibration-isolating installing device of inertial measurement unit for strapdown laser gyroscope

Abstract: The utility model discloses a vibration-isolating installing device of an inertial measurement unit for a strapdown laser gyroscope, which comprises a bracket, supporting feet, a stud and a vibration isolator, wherein the bracket is provided with a plurality of symmetrically-extending supporting-foot points, the bracket is connected with a product cabin segment, a laser IMU (Inertial Measurement Unit) is fixed by the supporting feet through a suspended stud, and the vibration isolator is installed between the laser IMU and the suspended stud; or the supporting feet are connected with the product cabin segment, the vibration isolator is installed between the bracket and the product cabin segment, and the laser IMU is fixed by the bracket through the suspended stud. The system disclosed by the utility model has good vibration-isolating effect, particularly the improvement for high-frequency vibration isolation is quite remarkable, the structural weight is lightened, and the occupied space is saved.

Assembling device for laser gyroscope optical element

Abstract: The invention relates to an assembling device for a laser gyroscope optical element. The assembling device comprises an optical platform, the laser gyroscope optical element, a resonant cavity rotating and jittering mechanism, a prism adjusting mechanism, a visual inspection mechanism and a phototube adjusting mechanism. The resonant cavity rotating and jittering mechanism is placed in one of the four directions of the optical platform. The prism adjusting mechanism is vertically placed on the optical platform in the anticlockwise direction of the resonant cavity rotating and jittering mechanism. The visual inspection mechanism is horizontally placed on the optical platform in the anticlockwise direction of the resonant cavity rotating and jittering mechanism and is right opposite to the resonant cavity rotating and jittering mechanism. The phototube adjusting mechanism is vertically placed on the optical platform in the clockwise direction of the resonant cavity rotating and jittering mechanism and is right opposite to the prism adjusting mechanism. A resonant cavity in the laser gyroscope optical element is formed in the resonant cavity rotating and jittering mechanism. The assembling quality and efficiency of the laser gyroscope optical element can be improved.

Coaxial Vibratory Gyroscope Using Two Pairs of Degenerate Modes

Abstract: A gyroscope using two pairs of degenerate modes for wide-range sensing is proposed We focused on a coaxial resonator composed of a cylinder and a column To evaluate the characteristics of the proposed gyroscope, we analyzed its frequency response and rotational response both experimentally and numerically From the frequency response under rotation, there was a difference between the shifts of resonance frequencies of two detecting modes We also found that the lower-frequency mode had higher sensitivity and the higher-frequency mode had a wider linear region from the rotation response of each mode These results suggest that high sensitivity for low-speed rotation and a wide linear region for high-speed sensing can be attained simultaneously by a single resonator with the help of two different pairs of degenerate modes

Photonic Modulation Using Bi-Directional Diamond Shaped Ring Lasers at 1550 NM

Abstract: : The Air Force Research Laboratory/Sensors Directorate (AFRL/SNDP) Binoptics Corp, and Infotonics Technology Center worked collaboratively to characterize and eventually package diode-based, diamond-shaped cavity, ring lasers that operate at 1550 nm. The laser modes propagate bi-directionally; however, uniaxial propagation was induced by optical injection from a tunable diode laser. The four-port laser ring offers use as an indirect modulator, directional router, and optical logic devices. Each optical output retains the encoding with either positive or negative logic, which can be used for conventional digital signal processing or routing. Secondly, the two counter-propagating laser modes provide a direct means for realizing the Sagnac effect, which has been well established in gyro technology with gas and fiber lasers. The ring lasers described here offer an ultra compact geometry for potential laser gyro and inertial sensor applications. These devices are scaleable and monolithically integrable with many semi-conductor based components including optical amplifiers, photodiodes, and electro-absorption modulators (EAMs).