Multi-spectrum closed-loop locking method and system for CPT magnetometer

A locking system, multi-spectrum technology, applied in the field of high-precision microwave frequency control, can solve the problem of blind area of ​​direction, loss of control system, and achieve the effect of eliminating magnetic field measurement errors, strong anti-interference ability, and avoiding system loss of lock.

Active Publication Date: 2020-04-21
BEIJING INST OF AEROSPACE CONTROL DEVICES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

From the above signal characteristics, it can be seen that there is a direction blind zone in this scheme. Under certain conditions, the control system will lose lock due to the attenuation of the tracked reference signal.

Method used

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  • Multi-spectrum closed-loop locking method and system for CPT magnetometer
  • Multi-spectrum closed-loop locking method and system for CPT magnetometer
  • Multi-spectrum closed-loop locking method and system for CPT magnetometer

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Embodiment Construction

[0025] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. 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. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0026] This embodiment provides a multi-spectrum closed-loop locking method for a CPT magnetometer, the method comprising the following steps:

[0027] Step ...

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Abstract

The invention discloses a multi-spectrum closed-loop locking method and a multi-spectrum closed-loop locking system for a CPT magnetometer. The multi-spectrum closed-loop locking method comprises thesteps of simultaneously generating a plurality of groups of modulation signals to be mixed with a microwave center frequency, simultaneously injecting the microwave signal frequency output from a mixer into a laser device, simultaneously exciting transition resonance of atoms of a plurality of groups of working media from a ground state to an excited state, and acquiring a CPT transmission signalspectral line corresponding to the modulated signal frequency. According to the multi-spectrum closed-loop locking method and the multi-spectrum closed-loop locking system, effective CPT transmissionsignals can be obtained when a laser direction of the CPT magnetometer and a direction of a to-be-measured magnetic field form any relative included angle, and the influence of CPT effect directivityfeatures on signal measurement is avoided. Compared with a CPT magnetometer with a single transmission peak tracking function, the multi-spectrum closed-loop locking method can obtain greater error signal amplitude, so that the magnetic field measurement sensitivity is improved, and the multi-spectrum closed-loop locking method has extremely high engineering application value.

Description

technical field [0001] The invention belongs to the technical field of high-precision microwave frequency control, and in particular relates to a multi-spectrum closed-loop locking method and system for a CPT magnetometer. Background technique [0002] CPT magnetometers are widely used in geomagnetic exploration, marine anti-submarine and space magnetic detection. Compared with other atomic magnetometers, they have significant advantages such as easy miniaturization, low power consumption and high precision. [0003] The CPT atomic magnetometer is based on the spectral characteristics generated by the change of the transition interference frequency of a specific atom with the magnetic field as the calculation basis to perform high-precision magnetic field measurement. Taking the resonance transition from the ground state to the excited state of a single group of atoms as an example, when two beams of coherent light with a specific frequency difference interact with the atoms...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/02H03L7/08
CPCG01R33/02H03L7/0805
Inventor 邓意成王学锋张笑楠张天宇徐强锋桑建芝卢向东李明阳李建军
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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