Multi-light source active anti-radiation device for optical fiber gyro

Abstract

The invention relates to an apparatus for using multi-light source to achieve optical fiber gyrostat active anti-spreading reinforce which is characterized in that it connects a large power semiconductor laser LD on the couple input end of the optical fiber gyrostat light path to process the strong light needed by the fiber optic discolor; the front output end of the optical fiber gyrostat is connected with the input end of the collaborating control circuit to monitor the front output signal and quote the running condition of the gyrostat; the output ends of the collaborating control circuit are separately connected with the optical fiber gyrostat SLD light source and the large power semiconductor laser LD to periodically open and close the large power semiconductor laser LD; the output end of the collaborating control circuit is connected with the signal processing circuit to control the open and close of the optical fiber gyroscope demodulating system to achieve the active preventionof the gyroscope.

Description

technical field [0001] The invention relates to an active anti-radiation reinforcement device for optical fiber gyroscope space application. Background technique [0002] Fiber optic gyroscopes have potential advantages in space applications, and the application of fiber optic gyroscopes to space is a trend in the development of fiber optic gyroscopes in China. However, the radiation effect of space will lead to the performance degradation of fiber optic gyroscope (FOG), which restricts the accuracy, reliability and life of the gyroscope. At present, the passive protection method is generally adopted in the fiber optic gyroscope, that is, to improve its radiation resistance performance by shielding the heavy metal of the fiber optic gyroscope shell. Although this can obviously improve the radiation resistance performance of the gyroscope, it will inevitably lead to an increase in the quality of the gyroscope. In space applications, the quality requirements are quite strict....

AI Technical Summary

Problems solved by technology

The main reason is that under the action of high-energy radiation, the optical fiber core silica glass undergoes physical and chemical changes, resulting in various defects (point defects, dislocations, color centers), thereby deteriorating the optical transmission performance of the optical fiber

Among them, the "color center" has the greatest influence, that is, the impurity ions Cl, OH and coloring ions contained in the quartz glass will cause impurity absorption loss under radiation conditions, which will increase the fiber loss.

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