A 461 nm Laser System and Hollow-Cathode Lamp Spectroscopy for Magneto-Optical Trapping of Sr Atoms

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概要

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• We develop a laser system with a wavelength of 461 nm and a power of 175 mW using a master oscillation power amplifier (MOPA) system and second-harmonic generation (SHG) via a KNbO3 crystal. To stabilize the laser frequency to the atomic absorption line, we measured the saturated absorption spectrum of a Sr hollow-cathode lamp. The dependences of the Lamb dip signal and the frequency modulation spectrum on the pump beam power were observed. The collision broadening due to the Ne buffer gas increased the observed width of the signals in addition to the saturation effect. In spite of such an increased width ({\sim}100 MHz), we demonstrated stable magneto-optical trapping of Sr atoms. The number of atoms obtained, 1\times 10^{7}, is sufficient to proceed to various ultracold Sr atoms experiments.

• 2012-03-15

著者

• Sakemi Yasuhiro

  Cyclotron And Radioisotope Center Tohoku University

• Aoki Takatoshi

  Institute of Physics, Graduate School of Arts and Sciences, University of Tokyo, Meguro, Tokyo 153-8902, Japan

• UMEZAWA Kotaro

  Institute of Physics, Graduate School of Arts and Sciences, University of Tokyo, Meguro, Tokyo 153-8902, Japan

• YAMANAKA Yuki

  Institute of Physics, Graduate School of Arts and Sciences, University of Tokyo, Meguro, Tokyo 153-8902, Japan

• Takemura Naotomo

  Institute of Physics, Graduate School of Arts and Sciences, University of Tokyo, Meguro, Tokyo 153-8902, Japan

• Torii Yoshio

  Institute of Physics, Graduate School of Arts and Sciences, University of Tokyo, Meguro, Tokyo 153-8902, Japan

関連論文

• Complete Set of Polarization Transfer Observables for the ^C(p, n) Reaction at 296MeV and 0°(Nuclear physics)
• High Rate Production of Polarized ^3He with Meta-Stability Exchange Method
• A 461 nm Laser System and Hollow-Cathode Lamp Spectroscopy for Magneto-Optical Trapping of Sr Atoms

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