We use a three-level structure of the $6S-6P-6D$ states of cesiumatoms to build an optical trap where the $6S_{1/2}$ and the$6P_{3/2}$ states have the same ac Stark shift. There is noinhomogeneous broadening of the $D2$ transition inside the opticaltrap. The loading rate is increased as a result of improvedDoppler cooling. However, the loss rate also increases, and thereis no large gain in the number of trapped atoms compared with thatof an optical trap with large inhomogeneous broadening. Thelifetime and the temperature of the optically trapped atoms alsodo not depend critically on the broadening of the $D2$ resonance.
We use a three-level structure of the $6S-6P-6D$ states of cesiumatoms to build an optical trap where the $6S_{1/2}$ and the$6P_{3/2}$ states have the same ac Stark shift. There is noinhomogeneous broadening of the $D2$ transition inside the opticaltrap. The loading rate is increased as a result of improvedDoppler cooling. However, the loss rate also increases, and thereis no large gain in the number of trapped atoms compared with thatof an optical trap with large inhomogeneous broadening. Thelifetime and the temperature of the optically trapped atoms alsodo not depend critically on the broadening of the $D2$ resonance.
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