Höckel David, Martin Eugen, Benson Oliver
Nano Optics, Institute of Physics, Humboldt-Universität zu Berlin, Hausvogteiplatz 5-7, 10117 Berlin, Germany.
Rev Sci Instrum. 2010 Feb;81(2):026108. doi: 10.1063/1.3309791.
We describe a combined ultranarrow bandpass filtering setup for single-photon experiments in quantum optics. The filter is particularly suitable for single-photon electromagnetically induced transparency (EIT) experiments, but can also be used in several similar applications. A multipass planar Fabry-Perot etalon together with polarization filters and spatial filtering allows 114 dB pump beam suppression, while the signal beam is attenuated by just 4 dB, although both wavelengths are only separated by 0.025 nm (9.2 GHz). The multipass etalon alone accounts for 46 dB suppression while it has a peak transmission of 65%. We demonstrate EIT experiments in Cs vapor at room temperature with probe power in the femtowatt regime using this filter.
我们描述了一种用于量子光学中单光子实验的组合式超窄带通滤波装置。该滤波器特别适用于单光子电磁诱导透明（EIT）实验，但也可用于其他一些类似应用。一个多程平面法布里 - 珀罗标准具与偏振滤波器和空间滤波器相结合，可实现114 dB的泵浦光束抑制，而信号光束仅衰减4 dB，尽管两种波长仅相差0.025 nm（9.2 GHz）。仅多程标准具就可实现46 dB的抑制，同时其峰值透过率为65%。我们使用该滤波器在室温下的铯蒸汽中进行了飞瓦量级探测功率的EIT实验。
