Far Off-Resonance Laser Frequency Stabilization Technology

Abstract

In atomic physics experiments, a frequency-stabilized or ‘locked’ laser source is commonly required. Many established techniques are available for locking close to an atomic resonance. However, in many instances, such as atomic magnetometer and magic wavelength optical lattices in ultra-cold atoms, it is desirable to lock the frequency of the laser far away from the resonance. This review presents several far off-resonance laser frequency stabilization methods, by which the frequency of the probe beam can be locked on the detuning as far as several tens of gigahertz (GHz) away from atomic resonance line, and discusses existing challenges and possible future directions in this field.

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“…We can find that the scheme has a relatively high requirement for Rabi frequency detuning, and the fidelity have 0.81 when the deviation is 0.03%. Considering that the value of V is very large, the existing experimental techniques are very fine [49][50][51], which can achieve a high degree of stable control of the laser frequency, and can maintain a low frequency drift even when it is far away from the atomic resonance line, for example, the drift of the detuning locked away from the atomic resonance line is less than 1 Mhz/h. Therefore, this scheme exhibits a certain level of robustness to detuning mismatches in experimental settings.…”