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arXiv · 1005.3152

Fiber-comb-stabilized light source at 556 nm for magneto-optical trapping of ytterbium

Masami Yasuda·Takuya Kohno·Hajime Inaba·Yoshiaki Nakajima·Kazumoto Hosaka·Atsushi Onae·Feng-Lei Hong
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Abstract

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.

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Masami Yasuda, Takuya Kohno, Hajime Inaba, Yoshiaki Nakajima, Kazumoto Hosaka, Atsushi Onae, Feng-Lei Hong. 2010-05-18. Fiber-comb-stabilized light source at 556 nm for magneto-optical trapping of ytterbium. https://doi.org/10.1364/josab.27.001388

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