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Full-light-path light intensity stable-controlling system of SERF atomic self-spinning top

A stable control and atomic spin technology, which is applied in Sagnac effect gyroscopes, optics, nonlinear optics, etc., can solve the problem of inability to integrate small SERF atomic spin gyroscope pumping and detection optical paths, low control accuracy, Slow response speed and other problems, to achieve the effect of suppressing light intensity fluctuations, convenient parameter adjustment, and low working voltage

Active Publication Date: 2018-01-30
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Method 1 has poor stability, and changing the laser diode injection current and temperature will change the frequency of the output laser. Method 2 has high stability accuracy, but the traditional method is to use an integrated acousto-optic modulator or electro-optic modulator, which cannot be integrated into a small SERF In the pumping and detection optical path of the atomic spin gyroscope, and the electronic control system generally uses analog circuits, the response speed is slow and the control accuracy is not high

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  • Full-light-path light intensity stable-controlling system of SERF atomic self-spinning top
  • Full-light-path light intensity stable-controlling system of SERF atomic self-spinning top

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] Such as figure 1 As shown, at first the first liquid crystal phase retarder 3 and the second liquid crystal phase retarder 13 are removed, and the first polarizer 5 and the second polarizer 15 are respectively rotated so that the intensity of the laser beam emitted therefrom is the minimum, thus When the light transmission axis of the first polarizer 5 and the second polarizer 15 is perpendicular to the light transmission axis direction of the pumping laser isolator 2 and the detection laser isolator 12 respectively, it is in an extinction state; then the first liquid crystal phase The retarder 3 and the second liquid crystal phase retarder 13 are reinstalled in as figure 1 In the positions shown, the first liquid crystal phase retarder 3 and the second liquid crystal phase retarder 13 are respectively rotated so that the intensity of t...

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Abstract

The invention discloses a full-light-path light intensity stable-controlling system of an SERF atomic self-spinning top. A liquid crystal phase delayer is utilized to inhibit pumping laser of the SERFatomic self-spinning top and detect the light intensity variation of the laser, and thus the stability of output signals of the SERF atomic self-spinning top is improved. According to the method, a photoelectric detector is firstly utilized to detect laser split by a beam splitter prism from a main pumping laser and detection laser path, detection signals are fed back to a digital controller through an analog-digital converter (ADC), the digital controller produces a PID control law based on a PID algorithm, the phase delay amount of the liquid crystal phase delayer is controlled through a digital-analog converter (DAC), control of laser intensity transmittance is achieved, and thus stable control of the intensity of pumping laser and detection laser is achieved. The beam splitter prism is arranged behind a photoelastic modulation module in a detection light path, thus the detection laser intensity variation before the laser enters an alkali metal air chamber is inhibited, stable control of full-light-path light intensity of the SERF atomic self-spinning top is achieved, the meanwhile miniaturization of the SERF atomic self-spinning top is facilitated.

Description

technical field [0001] The invention relates to a SERF atomic spin gyroscope light intensity stabilization control system for all optical paths, in particular to a liquid crystal phase retarder-based light intensity stabilization control system, which can be used for SERF atomic spin gyroscope laser light intensity stabilization control to suppress laser light intensity The fluctuation reduces the gyro drift of the SERF atomic spin gyroscope, which is beneficial to the miniaturization of the SERF gyroscope. Background technique [0002] SERF atomic spin gyroscope is the third generation of new gyroscope after electromechanical gyroscope and optical gyroscope. It uses atomic spin to replace mechanical rotor, and its theoretical accuracy can reach 10 -8 ° / h is one of the important development directions of ultra-high precision inertial navigation for a new generation of moving carriers. [0003] According to the SERF atomic spin gyroscope error transfer relationship, the fluc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13G02F1/133G01C19/72
Inventor 房建成黄炯刑力全伟范文峰姜丽伟刘峰
Owner BEIHANG UNIV
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