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A single-stage 1112 nm fiber amplifier with large gain for laser cooling of ytterbium

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Abstract

We present a single-stage Yb fiber amplifier pumped at 1064 nm which amplifies a low-power (5 mW) signal from a commercial distributed feedback (DFB) fiber laser at 1112 nm to several hundred mW. Compared to conventional fiber amplifiers, which are typically pumped at shorter wavelength, the single-stage gain of the amplifier is increased to more than 20 dB and the ASE level is reduced by an order of magnitude. Frequency doubling in a PPLN waveguide produces light at 556 nm, which is used to capture Yb atoms in a magneto-optical trap on the 1S0\(\rightarrow\) 3P1 intercombination line.

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Acknowledgements

We thank Ralf Stephan for his work on the electronic and mechanical components and Stephan Schiller for loan of the optical spectrum analyzer. T.F. acknowledges a fellowship from Prof.-W.-Behmenburg-Schenkung.

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Authors and Affiliations

  1. Institut für Experimentalphysik, Heinrich-Heine-Universität Düsseldorf, Universitätsstr. 1, 40225, Düsseldorf, Germany

    Tobias Franzen, Bastian Pollklesener & Axel Görlitz

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  1. Tobias Franzen
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  2. Bastian Pollklesener
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  3. Axel Görlitz
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Correspondence to Axel Görlitz.

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Franzen, T., Pollklesener, B. & Görlitz, A. A single-stage 1112 nm fiber amplifier with large gain for laser cooling of ytterbium. Appl. Phys. B 124, 234 (2018). https://doi.org/10.1007/s00340-018-7106-7

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  • DOI: https://doi.org/10.1007/s00340-018-7106-7

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