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.
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TL;DR: In this article, the principal features of a three-axis ring gyroscope are described and the equations of motion, the response to constant rates of turn, and the relationships between the modes of vibration are derived.
Abstract: The principal features of a three-axis ring gyroscope are described. The equations of motion, the response to constant rates of turn, and the relationships between the modes of vibration are derived. Tuned and untuned cases are considered.
46 citations
Patent•
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TL;DR: In this paper, a passive ring resonator laser gyro includes a thin film, passive waveguide adapted to provide a closed, substantially circular propagation path for optical signals, where a difference network generates a rate signal corresponding to the difference in frequency between the signals applied to the controllers.
Abstract: A passive ring resonator laser gyro includes a thin film, passive waveguide adapted to provide a closed, substantially circular propagation path for optical signals. Couplers are provided for coupling coherent optical signals in opposite directions in the waveguide. Frequency controllers for each of the counter-rotating optical signals are adapted to adjust the frequencies of the respective signals in the waveguide to achieve resonance along the optical path encountered by each of the signals. Detectors provide signals representative of the frequency shifts of the two counter-rotating optical signals in the waveguide. These signals are nulled by servos which apply correcting frequencies to the frequency controllers. A difference network generates a rate signal corresponding to the difference in frequency between the signals applied to the controllers. The rate signal is representative of the angular rotation rate of the waveguide.
45 citations
Journal Article•
45 citations
TL;DR: In this paper, a simple LD-end-pumped, passively mode-locked Nd:YVO4 ring laser with bidirectional outputs was demonstrated, and the gyroscopic properties of the ring laser was studied.
Abstract: A simple LD-end-pumped, passively mode-locked Nd:YVO4 ring laser with bidirectional outputs was demonstrated, and the gyroscopic properties of the ring laser was studied. The laser was continuous wave mode-locked by use of a semiconductor saturable absorber mirror (SESAM), and both clockwise and counter-clockwise outputs are stable laser pulse trains with pulse duration of 64 ps. The continuous wave mode-locking was obtained under pump power as low as 540 mW. The average output power is 50 mW for the counter-clockwise laser and 52mW for the clockwise laser under pump power of 1378 mW. The whole slope efficiency of the ring laser is about 9.4%. The two output pulse trains of the ring laser were combined to study its gyroscopic properties. The beat frequency of the pulsed solid-state laser gyro versus the rotation rates follows the Sagnac formula. The laser gyro has a large dead band of 6-8 dec/s, which was believed to be caused by the long pulse duration and the colliding of the opposite pulses on the SESAM.
45 citations
TL;DR: In this paper, the optical Sagnac effect at the single-photon level was demonstrated using a high quality guided-wave heralded singlephoton source at 1550 nm and a fiber optics setup.
Abstract: We present the first experimental demonstration of the optical Sagnac effect at the single-photon level. Using a high quality guided-wave heralded single-photon source at 1550 nm and a fibre optics setup, we obtain an interference pattern with net visibilities up to (99.2 ± 0.4%). On the basis of this high visibility and the compactness of the setup, the interest of such a system for fibre optics gyroscope is discussed.
44 citations