Laser refrigeration using exciplex resonances in gas filled hollow-core fibres

  title={Laser refrigeration using exciplex resonances in gas filled hollow-core fibres},
  author={Christian Sommer and Nicolas Y. Joly and Helmut Ritsch and Claudiu Genes},
We theoretically study prospects and limitations of a new route towards macroscopic scale laser refrigeration based on exciplex-mediated frequency up-conversion in gas filled hollow-core fibres. Using proven quantum optical rate equations we model the dynamics of a dopant-buffer gas mixture filling an optically pumped waveguide. In the particular example of alkali-noble gas mixtures, recent high pressure gas cell setup experiments have shown that efficient kinetic energy extraction cycles… 

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