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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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Patent
15 Sep 2014
TL;DR: In this article, a radio frequency based electronic gyroscope function is incorporated in its entirety on a monolithic integrated circuit (IC) for detection and measurement of movement in a particular plane.
Abstract: A radio frequency based electronic gyroscope function that may be incorporated in its entirety on a monolithic integrated circuit (IC). The detection and measurement of movement in a particular plane is based on the Sagnac effect as it applies to a radio frequency signal that propagates in two different directions in a loop that may be subject to rotational perturbation. In one embodiment, three mutually perpendicular loops that are incorporated into the same integrated circuit and are used to detect and measure movement in three planes (roll, pitch and yaw) thereby allowing a signal processing unit to quantify a general three dimensional movement. The gyroscope can be incorporated into an IC that is used in portable device, such as a mobile handset, to provide it with inertial navigation and movement detection and measurement capabilities.

6 citations

Journal ArticleDOI
TL;DR: In this article, a birefringent Sagnac gyroscope is described, which is based on the principle of optical frequency-modulated continuous-wave interference.
Abstract: A birefringent fibre Sagnac gyroscope is described, which is based on the principle of optical frequency-modulated continuous-wave interference and primarily consists of a single-longitudinal-mode frequency-modulated laser diode and a birefringent fibre coil. The rotation velocity of the fibre coil can be determined simultaneously by detecting the phase shift of the beat signal produced by two counter propagating laser beams in the birefringent fibre coil. A resolution of 0.02°/s with a 100 m fibre coil has been observed. The advantages and limitation of the gyroscope are discussed.

6 citations

Journal ArticleDOI
TL;DR: In this article, a vibratory tri-axis gyroscope with single drive and three axes angular rate sense is presented, based on the modal analysis of this structure, the operating principle of the operating system is explained.
Abstract: In this paper a vibratory tri-axis gyroscope with single drive and three axes angular rate sense is presented. Firstly the structural design is proposed. And based on the modal analysis of this structure the operating principle of gyroscope is explained. Secondly the detail design of this gyroscope is presented. Based on simulation, the performance of the gyroscope is evaluated, the character of structural coupling among the drive and sense modes is studied. Thirdly the SOI fabrication process for this gyroscope is described. Fourthly the circuitry design including AGC and PLL is discussed, and the signal process is described in detail. Finally the implementation of this gyroscope is presented. Experiment results show the performance of the gyroscope. The scale factors are ?0.0078 V/°/s, ?0.0043 V/°/s and ?0.0049 V/°/s along X-, Y- and Z-axis respectively. And experiment results also indicate the character of structural coupling among the drive and sense modes similar with the results of simulation.

6 citations

Proceedings ArticleDOI
17 Sep 1984
TL;DR: In this article, a nonplanar active ring laser cavities and their uses for the gyro builder are discussed and it is shown how a slightly non-planar configuration may create magnetic sensitivities and how they may be controlled.
Abstract: Nonplanar active ring laser cavities and their uses for the gyro builder are discussed and it is shown how a slightly nonplanar configuration may create magnetic sensitivities and how they may be controlled. Another origin of magnetic biases in both square and triangular ring laser gyros, namely stress-induced linear birefringence in the gyro mirrors, is examined and possible experimental arrangements for measuring the size of birefringences produced by stress in mirrors suggested.

6 citations

Proceedings ArticleDOI
TL;DR: In this paper, a crossover-free (CF) winding technique was proposed to eliminate fiber crossovers and allow the use of inexpensive single-mode fiber (SMF) for fiber sensor coil winding.
Abstract: The DoD goals for inertial sensors have included achieving high accuracy performance and small size at a low cost. This goal has always been a challenging endeavor, since small size and high accuracy have often been costly and technically difficult to achieve. In 1998, the Army patented a fiber sensor coil winding concept that would facilitate the opportunity to make the Fiber Optic Gyroscope (FOG) more competitive in cost with relation to the commonly-used Ring Laser Gyro (RLG). Recent advances in FOG sensor coil winding techniques appear to show great promise in the improved performance. The novel Crossover-Free (CF) winding technique eliminates fiber crossovers and allows the use of inexpensive single-mode fiber (SMF). Experiments were conducted with the use of an analog, open-loop testbed, which was characterized with a 1 km quadrupolar SM sensor coil. Various sensor coil configurations were spliced into the FOG testbed and bias drift tests were conducted. Different fiber lengths, coil diameters, and fiber wind configurations were evaluated. The Crossover-Free sensor coils were precision wound by a semi-automated Fiber Placement Machine (FPM) developed by Stanley Associates. The Crossover-Free sensor coils test results are compared to standard precision wound coils. The bias errors caused by the fiber crossovers in standard SM sensor coils are also discussed and compared to the near elimination of the crossovers in the CF design.

6 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202347
202275
202130
202062
201963
201841