Abstract

We theoretically study the loading of cold atoms into a crossed optical dipole trap (ODT). We compared the loading efficiency dependent on the trap geometry for Nd:YAG and ${\mathrm{CO}}_2$ laser ODTs. By crossing two Nd:YAG laser beams at a small angle, such as 10°, we can shape the geometry of the effective potential in the intersection region and achieve comparable performance to that of a single-beam ${\mathrm{CO}}_2$ laser ODT. We also calculate the optimal experimental parameters for these two laser wavelengths for laser power per beam ranging from 5 W to 100 W. We further experimentally studied the loading of laser-cooled ${}^{87}\mathrm{Rb}$ atoms into a small-angle crossed Nd:YAG ODT and found that the experimental data agreed with the simulation results.

© 2017 Optical Society of America

Diffraction-limited optical dipole trap with a hollow optical fiber

Yong-Il Shin, Myoungsun Heo, Jae-Wan Kim, Wooshik Shim, Heung-Ryoul Noh, and Wonho Jhe
J. Opt. Soc. Am. B 20(5) 937-941 (2003)

Sub-Doppler cooling of neutral atoms in a grating magneto-optical trap

J. Lee, J. A. Grover, L. A. Orozco, and S. L. Rolston
J. Opt. Soc. Am. B 30(11) 2869-2874 (2013)

Simulation of optical lattice trap loading from a cold atomic ensemble

Raymon S. Watson and John J. McFerran
J. Opt. Soc. Am. B 38(1) 36-43 (2021)

Cooling and trapping of atomic strontium

Xinye Xu, Thomas H. Loftus, John L. Hall, Alan Gallagher, and Jun Ye
J. Opt. Soc. Am. B 20(5) 968-976 (2003)

Laser cooling and trapping of atoms

H. J. Metcalf and P. van der Straten
J. Opt. Soc. Am. B 20(5) 887-908 (2003)