Abstract
We have demonstrated a robust method of tuning and stabilizing a diode laser frequency to the fluorescence peaks of the energy pooling occurred at thermal cesium vapor-glass interface. This technique is based on temperature-dependent shift of the two off-core fluorescence peaks caused by 6P3∕2+6P3∕2→7P(3∕2,1∕2)∕8S1∕2+6S1∕2 energy pooling collisions. We achieved laser linewidth of 1.1MHz and continuous tunability over ±200–600MHz within a temperature range of 360–420K by applying the wavelength modulation technology. Tunable frequency locking in such a wide range was constructed inexpensively with low laser power. It can also be extended to other wavelengths by using different atomic species.
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