Optical dipole trap(ODT)is becoming an important tool of manipulating neu-tral atoms.In this paper ODT is realized with a far-off resonant laser beam strongly fo-cused in the magneto-optical trap(MOT)of cesium atoms.The light shift is measured by simply monitoring the fluorescence of the atoms in the magneto-optical trap and the opti-cal dipole trap simultaneously.The advantages of our experimental scheme are discussed,and the effect of the beam waist and power on the potential of dipole trap as well as heating rate is analyzed.
LIU TaoGENG TaoYAN ShubinLI GangZHANG JingWANG JunminPENG KunchiZHANG Tiancai
We report the continuous wave （CW） second harmonic generation （SHG） with a periodically poled KTiOPO4 （PPKTP） pumped by a diode laser at 852.356 nm, which is exactly resonant on the cesium D2 transition. An output power of 54.4 mW of blue light at 426 nm was obtained at the pump power of 136.4 mW. The conversion efficiency is about 40%. The best matching temperature is 318.3 K. This CW blue light can be used for atomic physics, especially for the generation of nonclassical light at the transition of cesium atom through optical parametric oscillator （OPO）.
