A simplified 461-nm laser system using blue laser diodes and a hollow cathode lamp for laser cooling of Sr

We develop a simplified light source at 461 nm for laser cooling of Sr without frequency-doubling crystals but with blue laser diodes. An anti-reflection coated blue laser diode in an external cavity (Littrow) configuration provides an output power of 40 mW at 461 nm. Another blue laser diode is use...

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Bibliographic Details
Published inReview of scientific instruments Vol. 84; no. 6; p. 063101
Main Authors Shimada, Yosuke, Chida, Yuko, Ohtsubo, Nozomi, Aoki, Takatoshi, Takeuchi, Makoto, Kuga, Takahiro, Torii, Yoshio
Format Journal Article
LanguageEnglish
Published United States 01.06.2013
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Summary:We develop a simplified light source at 461 nm for laser cooling of Sr without frequency-doubling crystals but with blue laser diodes. An anti-reflection coated blue laser diode in an external cavity (Littrow) configuration provides an output power of 40 mW at 461 nm. Another blue laser diode is used to amplify the laser power up to 110 mW by injection locking. For frequency stabilization, we demonstrate modulation-free polarization spectroscopy of Sr in a hollow cathode lamp. The simplification of the laser system achieved in this work is of great importance for the construction of transportable optical lattice clocks.
ISSN:1089-7623
DOI:10.1063/1.4808246