Physics – Atomic Physics
Scientific paper
2010-05-18
J. Opt. Soc. Am. B, 2010 (ID 125081)
Physics
Atomic Physics
18 pages, 6 figures, submitted to and accepted by J. Opt. Soc. Am. B (ID 125081)
Scientific paper
A frequency-stabilized light source emitting at 556 nm is realized by frequency-doubling a 1112-nm laser, which is phase-locked to a fiber-based optical frequency comb. The 1112-nm laser is either an ytterbium (Yb)-doped distributed feedback fiber laser or a master-slave laser system that uses an external cavity diode laser as a master laser. We have achieved the continuous frequency stabilization of the light source over a five-day period. With the light source, we have completed the second-stage magneto-optical trapping (MOT) of Yb atoms using the 1S0 - 3P1 intercombination transition. The temperature of the ultracold atoms in the MOT was 40 uK when measured using the time-of-flight method, and this is sufficient for loading the atoms into an optical lattice. The fiber-based frequency comb is shown to be a useful tool for controlling the laser frequency in cold-atom experiments.
Hong Feng-Lei
Hosaka Kazumoto
Inaba Hajime
Kohno Takuya
Nakajima Yoshiaki
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