A diode laser system for spectroscopy of the ultranarrow transition in ytterbium atoms |
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Authors: | A Yamaguchi S Uetake Y Takahashi |
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Institution: | (1) Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan;(2) CREST, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan |
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Abstract: | A narrow-line diode laser system has been developed for high-resolution spectroscopy of the magnetic quadrupole transition
in ytterbium (Yb) atoms at 507 nm. The system consists of an extended-cavity laser diode at 1014 nm, a tapered amplifier and
a periodically poled lithium niobate nonlinear crystal which converts the wavelength from 1014 nm to 507 nm. We have stabilized
the laser frequency and reduced the linewidth below 1 kHz by tightly locking the laser to a high-finesse optical cavity. By
using the developed laser system, we have successfully observed the ultranarrow
transition in Yb atoms. Furthermore, our simple and compact laser system could be a high performance and portable frequency
reference using iodine spectra whose linewidth becomes less than 50 kHz around 507 nm. We have also demonstrated spectroscopy
of iodine molecules.
PACS 32.30.-r; 07.60.-j |
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Keywords: | |
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