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Dispersion control method for zeeman laser gyroscope

A technology of laser gyroscope and control method, which is applied in the field of optics, can solve problems such as damage, and achieve the effects of expanding application fields, quick start and performance improvement, and eliminating zero-bias transition process

Active Publication Date: 2012-06-20
FLIGHT AUTOMATIC CONTROL RES INST
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Problems solved by technology

In general, when the gyro is working, the frequency point is selected at zero dispersion (or equivalent dispersion is zero), but the power-on process destroys this relationship

Method used

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  • Dispersion control method for zeeman laser gyroscope
  • Dispersion control method for zeeman laser gyroscope
  • Dispersion control method for zeeman laser gyroscope

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Embodiment Construction

[0031] The present invention will be further described below by specific embodiment:

[0032] In a Zeeman laser gyroscope, when there is no magnetic field, frequency splitting does not occur, and the two opposing beams have the same cavity frequency, which is usually adjusted to be equal to the center frequency v of the gain curve 0 ; when the longitudinal magnetic field is added, the gain curve will split into a low frequency curve (v D - ) and high frequency curve (v D + ),Such as figure 2 As shown, while the dispersion curve n 0 will also split into n - and n + ,Such as figure 2 As shown, among them, the low frequency curve (v D - ) corresponds to the dispersion curve n - , the high frequency curve (v D + ) corresponds to the dispersion curve n + .

[0033] During the working process of the gyro, if the forward (reverse) beam at a certain point works in the low frequency curve (v D - ), then in the negative half-bias period, due to the change of the magnet...

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Abstract

The invention belongs to the field of optics and relates to a dispersion control method for a zeeman laser gyroscope. The method comprises the following steps of: taking an offset frequency volume and a temperature as a control parameter and a control switch; establishing a dispersion control model, namely, delta V=F (fb, T); controlling the offset volume delta V of a work voltage of a component by cavity length; and setting a working point offset of a zeeman laser gyroscope frequency-stabilizing system, thereby realizing the dispersion control. A dynamic compensating control device is established, and a dispersion error caused by the violent change of the temperature of a resonant cavity is compensated by the working point of the cavity length under real-time control, thereby greatly weakening and even eliminating a zero offset transition process of a full-solid laser gyroscope, realizing the quick starting and the performance improvement of the full-solid laser gyroscope, and further widening the application field of the gyroscope.

Description

technical field [0001] The invention belongs to the field of optics and relates to a Zeeman laser gyro dispersion control method. Background technique [0002] The Zeeman laser gyro works with circularly polarized light and uses the Zeeman effect to achieve frequency bias. It is an all-solid-state, strong shock and vibration-resistant laser gyro. The Zeeman effect is used to bias the frequency to change the dispersion characteristics of the laser gain medium, so that the performance of the gyroscope is affected by the dispersion characteristics. [0003] The dispersion of the medium is manifested in the phenomenon that the medium has different propagation speeds for incident light waves of different frequencies, and thus has different refractive indices. According to Maxwell's electromagnetic field theory, the refractive index of the medium and the speed of light waves in the medium depend on the dielectric constant ε of the medium, so ε is not a constant, but a function of...

Claims

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Application Information

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IPC IPC(8): G01C19/66G02B26/00
Inventor 韩宗虎陈林峰刘元正王维科冯艳丽
Owner FLIGHT AUTOMATIC CONTROL RES INST
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