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An Adaptive Suppression Device for Relative Intensity Noise of Optical Fiber Gyro Light Source

A technology of relative intensity noise and suppression device, which is applied in the direction of gyroscope/steering sensing equipment, measuring device, Sagnac effect gyroscope, etc., to achieve the effect of suppressing the influence of detection accuracy and simple structure

Active Publication Date: 2020-01-31
BEIHANG UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

However, since RIN is independent of optical power, when the optical power reaching the photodetector exceeds a few microwatts, RIN becomes the main noise source that limits the detection accuracy

Method used

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  • An Adaptive Suppression Device for Relative Intensity Noise of Optical Fiber Gyro Light Source
  • An Adaptive Suppression Device for Relative Intensity Noise of Optical Fiber Gyro Light Source
  • An Adaptive Suppression Device for Relative Intensity Noise of Optical Fiber Gyro Light Source

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Embodiment Construction

[0031] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0032] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

[0033] Usually, the spectrum of an ASE light source is approximately Gaussian in shape, and the spectrum can be obtained by an optical spectrum analyzer (Optical Spectrum Analyzer, OSA), that is, the d...

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Abstract

The invention discloses an optical fiber gyro light source relative intensity noise adaptive suppression device comprising an amplifying spontaneous emission light source (ASE light source), a Y waveguide, an optical fiber ring, a first detector, a second detector, a 50 / 50 polarization-maintaining coupler, a first 90 / 10 polarization-maintaining coupler, a second 90 / 10 polarization-maintaining coupler, and a signal processing module. The technical solution of the invention effectively suppresses the influence of RIN on the detection precision of the high-precision fiber optic gyroscope, is simple in structure and suitable for engineering applications, and can realize real-time detection and closed-loop control of signal light and reference optical power matching degree to ensure that RIN suppression maintains optimal results under actual use conditions.

Description

technical field [0001] The invention belongs to the technical field of fiber optic gyroscopes, in particular to a high-precision fiber optic gyroscope light source relative intensity noise adaptive suppression device. Background technique [0002] Fiber optic gyro is a kind of fiber optic angular velocity sensor based on the Sagnac effect. It has the advantages of all solid state, low cost, high reliability, and fast startup speed. It is widely used in aircraft, submarines, warships, missiles, satellites and other fields. In recent years, it has become a domestic A research hotspot of external inertial devices. The all-digital closed-loop detection scheme is the mainstream scheme of the fiber optic gyroscope at the present stage, which has the characteristics of high precision, large dynamic range and excellent linearity of scale factor. [0003] In a high-precision fiber optic gyroscope, an erbium-doped fiber light source based on amplified spontaneous emission (Amplified ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C19/72
CPCG01C19/721G01C19/725
Inventor 郑月冯天轩李立京张春熹陈和宇孔令海
Owner BEIHANG UNIV
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