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实现了利用铯原子圆二向色性激光稳频(DAVLL)技术保证频率的非共振锁定并连续可调。介绍了DAVLL技术用于稳定激光频率的基本原理,指出由于Cs原子复杂的能级结构,导致简单的DAVLL技术此处不再适用,并且发现稳频曲线的零点与磁场强度的大小有关;利用饱和吸收光谱测量磁场对DAVLL谱线鉴频零点的影响,发现激光频率在以Fg=4→Fe=5跃迁红失谐105MHz为中心50MHz范围内线性可调,频率稳定度可达3MHz。
Realized the use of cesium atomic circular dichroic laser frequency stabilization (DAVLL) technology to ensure the frequency of non-resonant locking and continuous adjustable. The basic principle of DAVLL technique for stabilizing laser frequency is introduced. It is pointed out that due to the complicated energy level structure of Cs atoms, the simple DAVLL technique is not applicable here, and the zero point of the steady-state curve is found to be related to the strength of the magnetic field. Absorption spectroscopy measurement of the magnetic field on the DAVLL spectral frequency zero point and found that the laser frequency in the Fg = 4 → Fe = 5 transition red-detuning 105MHz center 50MHz linearly adjustable range, the frequency stability up to 3MHz.