To solve the problem of phase-locking failure of the laser to be locked due to insufficient frequency response speed when the reference frequency of the optical phase-locked loop jumps in a wide range,a laser phase-locking and frequency-switching method based on voltage compensation is proposed on the basis of existing optical phase-locked loops.Firstly,a reference frequency switching model is constructed based on the loop characteristics of the optical phase-locking,and the evaluation method of the influence of the phase-locked Raman light on the phase of the atomic interferometer is analyzed.After that,by constructing the correspondence relationship between the laser frequency change and the piezoelectric ceramic voltage,the voltage-frequency conversion scale is obtained.Finally,according to the laser frequency demanded in the actual atomic interferometer,the switching frequency and the matching timing sequence of the compensating voltage is designed.The experimental results show that the phase-locked loop can be stabilized within 0.2 ms when the reference frequency is switched in the range of 300 MHz,and the interference with an interference time interval of 60 ms has been verified on the atomic interferometer.The proposed method provides an idea to improve the integration and reliability of the laser system in atom interferometer,which helps to promote the engineering development of the atom interferometer.
atom interferencelaser systemphase lockingvoltage compensation
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