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Optical fiber gyroscope with enhanced slow light effect

A technology of fiber optic gyroscope and light effect, which is applied in the direction of Sagnac effect gyroscope, etc., can solve the problem of insufficient stability, and achieve the effect of improving accuracy and steep amplitude-frequency response

Inactive Publication Date: 2013-09-04
PEKING UNIV
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  • Abstract
  • Description
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Problems solved by technology

Optical gyroscopes have the characteristics of compact structure and high sensitivity, but the stability is not as good as some modern mechanical gyroscopes

Method used

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  • Optical fiber gyroscope with enhanced slow light effect
  • Optical fiber gyroscope with enhanced slow light effect
  • Optical fiber gyroscope with enhanced slow light effect

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Embodiment Construction

[0049]The present invention has two implementation schemes, and the present invention will be further described below in conjunction with the accompanying drawings.

[0050] Image 6 It is the smallest structure of fiber optic gyroscope with enhanced slow light effect1. The input light passes through the 50:50 coupler 1 and is divided into two beams with equal power. The two main beams with opposite directions enter the coupling resonant ring from the coupler 2, and finally the light in direction 1 and direction 2 is coupled out through couplers 3 and 4. , and then coherently detected after being received by the photodetector, the difference between the detected resonant frequencies reflects the magnitude of the rotational angular velocity.

[0051] For minimal structure 1, a complete set of implementations such as Figure 7 shown. The light source S of the whole system requires that the coherence length of the light source must be greater than the product of the fiber coil...

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Abstract

The invention discloses an optical fiber gyroscope with an enhanced slow light effect, belonging to the technical field of communication and comprising two structures: one structure is that a light source is connected with an input end of a coupler 1 through an optical fiber, two output ends of the coupler 1 are respectively connected with one input end and one output end of a coupler 2 through a coupler, the other input end and the other output end of the coupler 2 are connected with a coupling resonant cavity, the couplers connected with the two output ends of the coupler 1 are respectively connected with a photoelectric detector and used for receiving a signal of the coupling resonant cavity; and the other structure is that the light source is connected with the input end of the coupler 1 through the optical fiber, one output end of the coupler 1 is connected with one input end of the coupler 2, and one output end of the coupler 2 is connected with the photoelectric detector, and the coupling resonant cavity is respectively connected with the other output end of the coupler 1 and the other input end of the coupler 2. Compared with the prior art, the optical fiber gyroscope has the advantages of low cost, high measurement accuracy and the like.

Description

technical field [0001] The invention relates to an optical fiber gyroscope, in particular to an optical fiber gyroscope with enhanced slow light effect, which belongs to the technical field of communication. Background technique [0002] A gyroscope is a rotational sensor used to measure the rotational angular velocity of the carrier on which it is mounted. Gyroscopes are widely used in the guidance of various aircraft and weapons, and various precision measurements in industry and military. There are three types of common gyroscopes: mechanical gyroscopes, laser gyroscopes, and fiber-optic gyroscopes (Fiber-optic gyroscope, FOG). The latter two are optical gyroscopes. Optical gyroscopes have the characteristics of compact structure and high sensitivity, but their stability is not as good as some modern mechanical gyroscopes. Due to the needs of the application, the new gyroscope should have high sensitivity and stability, low cost and power consumption, and small size. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C19/72
Inventor 李正斌孙月王大量徐连宇
Owner PEKING UNIV
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