Laser frequency stabilization system with rapid switching and frequency locking functions
By combining feedforward voltage and voltage scanning, the feedback control unit and photodetector are used to achieve rapid switching and locking of the laser frequency, solving the problem of frequency switching and locking difficulties in the prior art, and improving the stability and adaptability of the system.
CN119674691AInactive Publication Date: 2025-03-21BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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Patent Information
- Application Number
- CN202411563892.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-05
- Publication Date
- 2025-03-21
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Technical Problem
It is difficult for the prior art to achieve rapid switching and locking of laser frequency, especially in cold atomic interferometers. The frequency voltage relationship is affected by external factors, resulting in the system being unable to lock normally.
Method used
By combining feedforward voltage and voltage scanning, a scanning signal is applied to the laser unit through a feedback control unit, and the error signal interval is determined and demodulated to achieve rapid switching and locking of the laser frequency.
Benefits of technology
It realizes rapid switching and locking of laser frequency, simplifies the spatial optical path structure, and improves the stability and environmental adaptability of the system.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention discloses a laser frequency stabilization system with rapid switching and frequency locking functions, and belongs to the field of laser frequency stabilization. The system comprises a laser unit, a frequency stabilization optical path unit and a feedback control unit. The laser unit enters the frequency stabilization light path unit in a beam splitting mode, EOM modulation is provided by the feedback control unit before the frequency stabilization light path unit, the feedback control unit scans input voltage of the laser unit, a saturated absorption signal and a modulation transfer signal are obtained from the frequency stabilization light path unit, and an error signal interval is determined through the saturated absorption signal; and demodulating the modulation transfer signal to obtain an error signal and locking the error signal. When frequency switching is carried out, the feedback control unit relieves frequency locking control, meanwhile, the EOM modulation frequency is changed, feed-forward voltage is applied to the laser so that the laser frequency jumps to be close to the new target frequency, and voltage scanning is started immediately so that an error signal can be obtained and locked. According to the invention, stable and rapid laser frequency switching locking is realized in a mode of combining feed-forward voltage and voltage scanning.
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