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
••
23 Mar 2015TL;DR: In this paper, the Dual Foucault Pendulum (DFP) gyroscope is proposed, which consists of two mechanically coupled proof masses oscillating in anti-phase motion, creating a dynamically balanced resonator with xy symmetry in frequency and damping.
Abstract: We report a new type of MEMS rate integrating gyroscope. The Dual Foucault Pendulum (DFP) gyroscope consists of two dynamically equivalent, mechanically coupled proof masses, oscillating in anti-phase motion, creating a dynamically balanced resonator with x-y symmetry in frequency and damping. Phase synchronization is established by mechanical coupling of the two proof masses, whereas quadrature suppression is achieved by four differential shuttle pairs placed in-between. Dual axis tuning fork behavior provides vibration immunity and anchor loss mitigation, resulting in a Qfactor over 100,000 on both modes at a center frequency of 2.7 kHz. Whole angle mechanization is demonstrated by FPGAbased closed loop control of the gyroscope, showing a scale factor variation of 22 ppm RMS over 2 hours of measurement. We believe Dual Foucault Pendulum is the minimal realization of a dynamically balanced lumped mass whole angle (WA) gyroscope.
20 citations
•
18 Feb 1986TL;DR: In this paper, the sum and difference of the two opposed beam intensities and their phase angles are used to compensate for the laser gain and loss dependent terms and for the back-scattering terms which heretofore have been caused errors in the readout.
Abstract: In a ring laser gyroscope the sum and the difference of the two opposed beam intensities is utilized, in a first implementation, to correct gain non-linearity, and in a second implementation, to adjust tuning mirror positions to minimize non-linear gain output. In a third implementation one or two external mirrors can be used to feed back into the cavity to produce linear gain output, again using the sum and difference of the two opposed beam and the phase angle between the two beams. Accordingly, the sum and the difference of the beam intensities and their phase angle is used to compensate for the laser gain and loss dependent terms and for the back-scattering terms which heretofore have been caused errors in the readout.
20 citations
•
13 Mar 1986TL;DR: In this article, a two-source passive ring resonator gyroscope with integral first, second and third resonator cavities is used to provide a first single frequency light source.
Abstract: A two source passive ring resonator gyroscope having a single piece body with integral first, second and third resonator cavities. A first laser means uses the first resonator cavity to provide a first single frequency light source. A second laser uses the second resonator for a second laser to provide a second single frequency light source. The third resonator cavity is a passive high Q evacuated cavity having a closed optical path tuned to resonate at substantially the light frequency of the first and second resonator cavities. The first signal frequency light source is split into a propagating light source and a first reference frequency light source. The propagating source is coupled into the third resonator cavity to form a propagating light beam. The second single frequency light source is split into a second frequency light source and into a second reference frequency light source. The light from the second frequency light source is modulated at the reference carrier frequency (FO) to form a carrier modulated offset frequency counterpropagating light source. This source is coupled into the third resonator cavity. Two cavity servos respond to the first and second dither signals to provide control signals to the first and second laser transducers to control the resonant frequency of the first and second single frequency light sources.
20 citations
•
18 Dec 1978
TL;DR: In this paper, a single mode laser gyro is provided with mechanically dithered mirrors at its three or four reflection points, each mirror is mounted for movement in and out as the result of the expansion and contraction of stacks of piezoelectric elements associated with each mirror.
Abstract: A single mode laser gyro having two oppositely traveling laser beams is provided with mechanically dithered mirrors at its three or four reflection points. Each mirror is mounted for movement in and out as the result of the expansion and contraction of stacks of piezoelectric elements associated with each mirror. The mirrors are dithered or oscillated in and out, at the same frequency and in phase relationship with one another so that the perimeter distance for the laser cavity is held at a fixed number of wavelengths, but the laser beam translates back and forth across the faces of the mirrors. By this technique, the undesired phenomena of lock-in at low rotation rates is avoided, without the need for special optical or magnetic structures in the path of the laser beam.
20 citations