Precise measurement of hyperfine intervals using avoided crossing of dressed states
arXiv:physics/0209020 · doi:10.1209/epl/i2002-00338-1
Abstract
We demonstrate a technique for precisely measuring hyperfine intervals in alkali atoms. The atoms form a three-level system in the presence of a strong control laser and a weak probe laser. The dressed states created by the control laser show significant linewidth reduction. We have developed a technique for Doppler-free spectroscopy that enables the separation between the dressed states to be measured with high accuracy even in room-temperature atoms. The states go through an avoided crossing as the detuning of the control laser is changed from positive to negative. By studying the separation as a function of detuning, the center of the level-crossing diagram is determined with high precision, which yields the hyperfine interval. Using room-temperature Rb vapor, we obtain a precision of 44 kHz. This is a significant improvement over the current precision of ~ 1 MHz.
4 pages, 4 figures. To be published shortly in Europhysics Letters
References in corpus (2)
Cited by in corpus (9)
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