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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10 Sep 2010
TL;DR: In this paper, an active stabilization of a high sensitivity laser gyroscope operating in a square cavity of side length of the order of 1 m with a measured sensitivity limit at the level of 2 · 10 -9 (rad/s)/============√Hz was presented.
Abstract: An high sensitivity laser gyroscope is presented operating in a square cavity of side length of the order of 1 m
with a measured sensitivity limit at the level of 2 · 10 -9 (rad/s)/
√Hz. We report on the active stabilization of the
laser optical frequency which is mainly driven by the environmental thermal fluctuations and the experimental
results obtained with the active stabilization system are given. Finally the applications of this gyrolaser as an
high-sensitive tilt-meter in Virgo, the large-frame interferometer for gravitational waves detection, are discussed.
1 citations
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TL;DR: Amplitude of intensity of resonance wave in the ring was analyzed under the condition of optimum resonance and non-optimum resonance, and relationship of these parameters is demonstrated in this paper, where general expressions of intensity ratio of light in ring and output port were deduced according to multiple-beam interference, and optimum resonance condition was given.
Abstract: Characteristics of ring resonator in integrated optical waveguide gyroscope are key factors in design and fabrication of ring resonator.General expressions of intensity ratio of light in ring and output port were deduced according to multiple-beam interference,and optimum resonance condition was given.Amplitude of intensity of resonance wave in the ring was analyzed under the condition of optimum resonance and non-optimum resonance,and relationship of these parameters is demonstrated.
1 citations
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1 citations
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25 May 2016
TL;DR: In this paper, a mechanically dithered ring laser gyro dither device based on DSP and FPGA is presented, where a dithering mechanism generates a dither signal, and first passes the dither signals through a voltage follower, and then performs RC filtering.
Abstract: The present invention relates to a mechanically dithered ring laser gyro dither device based on DSP and FPGA. A dithering mechanism generates a dither signal, and first passes the dither signal through a voltage follower, and then performs RC filtering; the filtering results are sent to a frequency follower circuit and a fixed amplitude circuit; the signal output by the frequency stabilization circuit directly enters an I / O port of a DSP; the output signal by the fixed amplitude circuit passes through an A / D converter and is transmitted to a DSP; the DSP conducts internally amplitude modulation and frequency follow, and outputs PWM wave to an FPGA; the FPGA conducts a phase shift processing, and outputs the results to a power amplifier circuit; and the results finally enter the dithering mechanism. The device has simple structure, small size and high control accuracy.
1 citations
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23 Apr 2018
TL;DR: In this article, the angular velocity of a laser gyroscope with an alternating frequency support was measured using the time intervals between the first and last pulses on each half-cycle of switching the frequency stand, and also the number of pulses during these time intervals is calculated according to the formula.
Abstract: FIELD: laser engineering.SUBSTANCE: invention relates to measuring laser technology and can find its application in the measurement of the angular velocity of a laser gyroscope with an alternating frequency support. For this purpose, it is ensured that a sequence of pulses is formed on the basis of the output signal of rotation of the laser gyroscope, which follow one another at intervals, equal to the period of the output signal, counting the number of pulses of the output signal of rotation of the laser gyroscope on each half-cycle of switching the frequency base, determination of the sign of the frequency difference of counterpropagating waves and determining the start time of each half-period. Time intervals are measured between the first and last pulse on each half-cycle of switching the frequency stand, and also the number of pulses during these time intervals is counted and the angular velocity is determined according to the formula: Ω=(N/t+N/t)/2K, where Ω - average angular velocity; tand t- time intervals between the first and last pulses in the half-period with the positive and negative sign of the frequency support, respectively; Nand N- the number of pulses calculated at time intervals tand trespectively, with a sign of the frequency difference of counterpropagating waves; K is the scale factor of the laser gyroscope. To increase the accuracy of the angular velocity measurement, the measurement is performed over several periods of switching the frequency support, and for the measured value of the angular velocity, the arithmetic mean is taken from the angular velocity values obtained for each period. At the same time, the dynamic capture zones are eliminated in the output characteristic of the laser gyroscope and the accuracy of the angular velocity measurement is increased.EFFECT: technical result is higher accuracy.1 cl, 1 dwg
1 citations