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Method for realizing anti-radiation reinforcement of optical fiber gyro by means of optical photofading

A technology of anti-radiation reinforcement and fiber optic gyroscope, which is applied in the direction of Sagnac effect gyroscope, etc., can solve the problem of weight increase of fiber optic gyroscope, and achieve the effect of solving the problem of radiation resistance performance

Inactive Publication Date: 2006-07-19
BEIHANG UNIV
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Problems solved by technology

At present, the anti-radiation reinforcement measures of the fiber optic gyroscope are usually passive protection, and the anti-radiation performance of the fiber optic gyroscope is improved through the heavy metal shielding of the fiber optic gyroscope, which will increase the weight of the fiber optic gyroscope.

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  • Method for realizing anti-radiation reinforcement of optical fiber gyro by means of optical photofading
  • Method for realizing anti-radiation reinforcement of optical fiber gyro by means of optical photofading
  • Method for realizing anti-radiation reinforcement of optical fiber gyro by means of optical photofading

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Embodiment Construction

[0015] Such as figure 1 As shown, the main measures taken by the present invention are: adding a high-power semiconductor laser LD for light-fading treatment, injecting strong laser light into the optical path of the fiber optic gyroscope, and adopting a high-power semiconductor laser for discontinuous, short-time light-fading treatment, namely The anti-irradiation active reinforcement of the fiber optic gyroscope can be realized.

[0016] The application of light fading is controlled by the signal feedback output from the preamplifier and the opening and closing of the corresponding fiber optic gyro circuit demodulation system. When the fiber optic gyroscope works normally, the system demodulation has a minimum requirement on the output signal of the preamplifier. In the space environment, the fiber optic gyroscope is affected by radiation, and the loss of the fiber optic ring and the pigtails of all optoelectronic devices increases, resulting in a decrease in the optical po...

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Abstract

The invention relates to a method for using light discolor to achieve the optical fiber gyrostat anti-spreading reinforce which is a method for adopting active prevention to achieve the anti-spreading reinforce. It uses the light discolor principle of the optical fiber on spreading condition and adopts large power semiconductor laser to inject the strong laser to the optical fiber gyrostat so that the inner optical fiber ring of the optical fiber gyrostat and the rear fiber loss of the photo conducting devices are alleviated to improve the anti-spreading capability of the optical fiber gyrostat. It uses the signal feedback to control the open and the close of the large power semiconductor laser and the corresponding optical fiber gyrostat demodulating system.

Description

technical field [0001] The invention relates to an anti-radiation strengthening method for fiber optic gyroscopes in space applications. Background technique [0002] The fiber optic gyroscope (FOG) is used in space, and its performance will be degraded due to the influence of space radiation. The polarization-maintaining fiber coil (PM Fiber Coil) with a length of several hundred meters to several kilometers in the interferometric fiber optic gyroscope currently used, as well as the fiber optic pigtails of all optoelectronic devices in the fiber optic gyroscope, are seriously affected by radiation. The specific performance is that the loss of the optical fiber increases in the irradiation environment. The reason is that under the action of high-energy radiation, the optical fiber core quartz glass undergoes physical and chemical changes (discoloration, hardening, brittleness, decomposition, destruction, etc.), resulting in various defects (points) Defects, dislocations, co...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C19/72
Inventor 肖文张玉艳伊小素杨远洪刘德文韩艳玲
Owner BEIHANG UNIV
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