к ф-м.н., ст.н.с
ХАРАКТЕРИСТИКИ ПРОПУСКАНИЯ РУБИДИЕВОГО АТОМНОГО ОПТИЧЕСКОГО ФИЛЬТРА НА ДЛИНЕ ВОЛНЫ 780 нм, ИСПОЛЬЗУЮЩЕГО РАМАНОВСКОЕ УСИЛЕНИЕ
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The transmission characteristics of a Raman-amplified atomic filter that can be used to detect fairly weak signals in free-space quantum-key distribution or laser communications are analyzed and discussed in the coherent and incoherent pump fields respectively. The theoretical model for the calculation of the transmission characteristics of a ground- state Raman-amplified Faraday dispersion atomic optical filter based on Raman gain and Faraday rotation is presented. The results show that the filter in a coherent pump field can achieve higher transmission and larger tunability than that in an incoherent pump field due to elimination of pumping detuning. In addition, the filter has a large scale tunability over 3.5 GHz via the Faraday transmission peak adjusted while its bandwidth is only 66 MHz, which is useful for free-space laser communication and lidar systems.
Ключевые слова: atomic optical filter, Raman light amplification, Rubidium, Faraday dispersion, hyperfine structures