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Ring laser gyroscope

About: Ring laser gyroscope is a(n) research topic. Over the lifetime, 2070 publication(s) have been published within this topic receiving 18609 citation(s). The topic is also known as: Sagnac interferometer. more


Journal ArticleDOI: 10.1103/PHYSREVLETT.78.2046
Abstract: We report the demonstration of a Sagnac-effect atom interferometer gyroscope which uses stimulated Raman transitions to coherently manipulate atomic wave packets. We have measured the Earth's rotation rate, and demonstrated a short-term sensitivity to rotations of $2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}8}(\mathrm{rad}/\mathrm{s})/\sqrt{\mathrm{Hz}}$. more

Topics: Atom interferometer (58%), Ring laser gyroscope (56%), Sensitivity (control systems) (54%) more

598 Citations

Journal ArticleDOI: 10.1103/REVMODPHYS.57.61
Abstract: This paper presents a review of both active and passive ring laser devices. The operating principles of the ring laser are developed and discussed, with special emphasis given to the problems associated with the achievement of greater sensitivity and stability. First-principle treatments of the nature of quantum noise in the ring laser gyro and various methods designed to avoid low-rotation-rate lock-in are presented. Descriptions of state-of-the-art devices and current and proposed applications (including a proposed test of metric theories of gravity using a passive cavity ring laser) are given. more

Topics: Ring laser (62%), Ring laser gyroscope (61%)

536 Citations

05 Nov 1993-
Abstract: An automobile collision avoidance system based on laser radars is disclosed for aiding in avoidance of automobile collisions. The very small beam width, very small angular resolution and the highly directional character of laser radars provide a plurality of advantages as compared with microwave radars. With two sets of laser radars this system can detect the location, the direction of movement, the speed and the size of all obstacles specifically and precisely. This system includes laser radars with transmitters and receivers, a computer, a warning device and an optional automatic braking device. A steering wheel rotation sensor or a laser gyroscope is utilized to give information of system-equipped vehicle's directional change. The system will compare the predicted collision time with the minimal allowable time to determine the imminency of a collision, and when determined, provides a warning. An optional automatic braking device is disclosed to be used when the vehicle user fails to respond to a warning. Furthermore, a wheel skidding detecting system based on a discrepancy between the directional change rate predicted by a steering wheel rotation sensor and the actual directional change rate detected by a laser gyroscope is also disclosed. The detection of wheel skidding can be utilized by various vehicle control designs. An averaging device for a steering wheel and a vehicle tilting sensor are used to supplement the steering wheel rotation sensor to improve the accuracy of the automobile collision avoidance system and the wheel skidding detecting system. more

Topics: Steering wheel (60%), Collision avoidance system (58%), Automatic braking (55%) more

411 Citations

Journal ArticleDOI: 10.1088/0264-9381/17/12/311
Abstract: We reports improvements to our Sagnac effect matter-wave interferometer gyroscope. This device now has a short-term rotation-rate sensitivity of 6×10−10 rad s−1 over 1 s of integration, which is the best publicly reported value to date. Stimulated Raman transitions are used to coherently manipulate atoms from counterpropagating thermal beams, forming two interferometers with opposite rotation phase shifts, allowing rotation to be distinguished from acceleration and laser arbitrary phase. Furthermore, electronically compensating the rotation-induced Doppler shifts of the Raman lasers allows operation at an effective zero rotation rate, improving sensitivity and facilitating sensitive lock-in detection readout techniques. Long-term stability is promising but not yet fully characterized. Potential applications include inertial navigation, geophysical studies and tests of general relativity. more

Topics: Sagnac effect (68%), Ring laser gyroscope (68%), Fibre optic gyroscope (63%) more

385 Citations

Journal ArticleDOI: 10.1063/1.89455
Abstract: A new method of measuring inertial rotation is presented. It is based on the use of a passive ring resonator as the rotation sensing element and an external laser for measuring the difference between the clockwise and counterclockwise lengths of the resonator. Preliminary performance data is included. more

Topics: Helical resonator (67%), Ring laser gyroscope (65%), Dielectric resonator antenna (61%) more

233 Citations

No. of papers in the topic in previous years

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Topic's top 5 most impactful authors

Jacopo Belfi

29 papers, 473 citations

Nicolo' Beverini

27 papers, 441 citations

Enrico Maccioni

25 papers, 353 citations

Antonello Ortolan

19 papers, 402 citations

Byoung Yoon Kim

17 papers, 289 citations

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