Applied Physics B

, 124:234 | Cite as

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

  • Tobias Franzen
  • Bastian Pollklesener
  • Axel GörlitzEmail author


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.



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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© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Institut für ExperimentalphysikHeinrich-Heine-Universität DüsseldorfDüsseldorfGermany

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