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.
Papers published on a yearly basis
Papers
More filters
••
TL;DR: A novel electrodynamic approach is presented that confirms in more detail that the Sagnac phase shift of a ring-waveguide interferometer is the same as for the original Sagnacs experiment with plane waves in a vacuum.
Abstract: We review the kinematic explanation of the Sagnac effect in fiber gyroscopes and recall that the index of the dielectric medium does not have any influence. Furthermore, we present a novel electrodynamic approach that confirms in more detail that the Sagnac phase shift of a ring-waveguide interferometer is the same as for the original Sagnac experiment with plane waves in a vacuum.
220 citations
••
20 Mar 2017TL;DR: In this paper, a chip-based, micro-optical gyroscope is demonstrated that uses counterpropagating Brillouin lasers to measure rotation as a Sagnac-induced frequency shift.
Abstract: Optical-based rotation sensors have revolutionized precision, high-sensitivity inertial navigation systems. At the same time these sensors use bulky optical fiber spools or free-space resonators. A chip-based, micro-optical gyroscope is demonstrated that uses counterpropagating Brillouin lasers to measure rotation as a Sagnac-induced frequency shift. Preliminary work has demonstrated a rotation-rate measurement that surpasses prior micro-optical rotation-sensing systems by over 40-fold.
211 citations
••
TL;DR: In this article, the role of integrated optics and photonic integrated circuit technology in the enhancement of gyroscope performance and compactness is broadly discussed, and the architecture of new slow-light integrated angular rate sensors is described.
Abstract: Photonics for angular rate sensing is a well-established research field having very
important industrial applications, especially in the field of strapdown inertial
navigation. Recent advances in this research field are reviewed. Results obtained in
the past years in the development of the ring laser gyroscope and the fiber optic
gyroscope are presented. The role of integrated optics and photonic integrated
circuit technology in the enhancement of gyroscope performance and compactness is
broadly discussed. Architectures of new slow-light integrated angular rate sensors
are described. Finally, photonic gyroscopes are compared with other solid-state
gyros, showing their strengths and weaknesses.
200 citations
••
TL;DR: A new all-fiber gyroscope is described, using a laser-diode source to reduce coherent scattering effects and proper choice of modulation frequency to reduce instabilities.
Abstract: A new all-fiber gyroscope is described. All components are constructed directly on a single continuous optical fiber, removing localized sources of reflection. A laser-diode source is used to reduce coherent scattering effects. Proper choice of modulation frequency is shown to reduce instabilities further. Long-term stability at rest of better than 0.2 masculine/h is observed with 30-sec integration time.
188 citations
•
22 Jan 1993
TL;DR: In this paper, an automobile collision avoidance system based on laser radars for aiding in avoidance of automobile collisions is presented. But the system is not suitable for use in highway driving.
Abstract: An automobile collision avoidance system based on laser radars 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. When the system determines that a situation likely to result in an accident exists, it 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, including designs to adjust rear wheel steered angle in a four wheel steering vehicle, to alleviate or correct the wheel skidding. Designs to decelerate the engine or to adjust the transmission to lower gears are also disclosed to alleviate wheel skidding.
168 citations