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We have magneto-optically trapped cold ytterbium atoms using an intercombination transition for realizing an optical lattice clock. For this purpose, we have developed a laser-diode-based light source, which is phase-locked to an optical frequency comb, thus attaining both laser frequency stabilization and laser linewidth narrowing.
The authors have demonstrated optical frequency synthesis using a fiber-based frequency comb system, referenced to an ultrastable microwave oscillator. The oscillator is based on a high Q-factor cryogenic sapphire resonator cooled with liquid helium. The 100-MHz signal synthesized from the 10.8-GHz oscillation frequency of the cryogenic sapphire oscillator (CSO) was used to stabilize the repetition...
Laser-diode-pumped Nd:YAG lasers at 1319 nm are frequency stabilized by locking their frequency-doubled output (660 nm) to Doppler-free absorption lines of molecular iodine. The frequency stability of the lasers has reached a level of 8/spl times/10/sup -13/ when the integration time is longer than 50 s.
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