Abstract
Atom-photon interaction promises to be a fundamental resource for applications like quantum computations [1]. For an efficient interaction between light and atoms, the bandwidth of the light should match the natural line width of the atom transition to address, 6 MHz in the case of the Di line of rubidium. Cavity-enhanced down-conversion (CEDC) [2,3] produces bright narrow-band quantum light with suitable linewidth but multimode in frequency. This requires the use of one or more filter cavities [2]. The filter we present can be used for filtering the spectral mode of interest with a high extinction ratio for the other modes and thus, combined with a CEDC, provide light for optimal interaction with rubidium atoms.
© 2009 IEEE
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