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Laser gyro having a solid-state amplifying medium and an optical ring cavity

A technology of laser gyroscope and optical cavity, applied in the field of laser gyroscope, can solve problems such as abnormal operation of laser gyroscope, and achieve the effect of uniform gain and reduction of root causes.

Inactive Publication Date: 2011-09-07
THALES SA
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Problems solved by technology

Translating this implementation mode, i.e. the mechanical activity of the cavity, to a solid-state laser gyroscope creates problems because in this case the injection optics are outside the cavity undergoing a rotational oscillatory motion that temporally changes the amplification medium relative to the pump position of the beam, thereby causing a modulation of the intensity of the cavity emission, which can cause severe malfunction of the laser gyroscope

Method used

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  • Laser gyro having a solid-state amplifying medium and an optical ring cavity
  • Laser gyro having a solid-state amplifying medium and an optical ring cavity
  • Laser gyro having a solid-state amplifying medium and an optical ring cavity

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Embodiment Construction

[0038] Elements with the same reference number are the same in the various figures.

[0039] like figure 1 As exemplified in , a laser gyroscope GL with a solid-state amplifying medium MAES and a ring optical cavity COA comprises an assembly EE surrounding the optical cavity COA and capable of undergoing an oscillatory rotational motion. Means for setting the assembly EE into an oscillating rotational motion are not depicted. In a conventional manner, this means for setting the assembly EE into an oscillating rotary motion produces, by mechanical action, oscillations at a frequency of 100 Hz to 1 kHz for maximum angular rates that can reach one hundred degrees per second, or indeed several hundred degrees per second.

[0040] The laser gyroscope GL also comprises at least one external optic DEOILE for the longitudinal injection of energy into the solid-state amplification medium MAES. The laser gyroscope GL also comprises a fixed assembly EF configured to translationally and...

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Abstract

The laser gyro having a solid-state amplifying medium (MAES) and an optical ring cavity (COA) comprises an assembly (EE) containing the optical cavity (COA) and capable of undergoing an oscillatory rotational movement, together with at least one external longitudinal optical energy injection device (DEOILE) for injecting energy into the solid-state amplifying medium (MAES). The laser gyro also includes a fastening assembly (EF) designed to make said assembly (EE) containing the optical cavity and said external longitudinal optical energy injection device (DEOILE) undergo translational and rotational movement as one entity.

Description

technical field [0001] The present invention relates to laser gyroscopes including solid-state amplifying elements. Background technique [0002] Laser gyroscopes are motion sensors that make it possible to measure the rate of rotation of the sensor's reference frame relative to the Galilean reference frame about one or more axes. [0003] Laser gyro velocimeters, or laser gyroscopes, are bidirectional ring lasers that make it possible to measure angular rate (or, by integrating over time, relative angular position). It includes an optical cavity made up of several mirrors assembled on a block into which paths are drilled to provide the optical cavity. An amplifying medium is inserted in the optical path of the cavity, and an excitation system must provide energy to the amplifying medium to make it possible to generate laser gain. The components making up the laser cavity are chosen to allow bidirectional operation: the laser cavity must be able to sustain two waves in opp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C19/66G01C19/70G01C19/72
CPCG01C19/66G01C19/70
Inventor F·古蒂G·弗格内S·施瓦茨
Owner THALES SA
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