Abstract
By using Faraday optical filter combined with four-wave mixing (FWM)
amplifier, a narrow bandwidth optical amplifying atomic filter with switchable
dual-passband is demonstrated experimentally. The two transmission peaks of the
filter correspond to the Stokes and anti-Stokes frequencies, exhibiting a Raman gain
in 13- and 17-fold, respectively, with bandwidth of ?120 MHz. By properly setting
pump laser detuning, switching between filter passbands is realized. We also
investigate the dependence of peak transmission on both pump laser intensity and Rb
cell temperature. This atomic filter can find practical applications in
long-distance laser communications and laser remote-sensing systems.
© 2011 Chinese Optics Letters
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