Nilsen J, Gluck N S, Yariv A
California Institute of Technology, Pasadena, California 91125, USA.
Opt Lett. 1981 Aug 1;6(8):380-2. doi: 10.1364/ol.6.000380.
An ultrahigh-Q, tunable optical filter with a FWHM bandwidth of 41 MHz is demonstrated. The filtering is produced by nondegenerate phase conjugation through four-wave mixing in atomic-sodium vapor. The filter is observed to have a maximum quantum efficiency of 4 x 10(-3). However, degenerate phase-conjugation experiments in sodium suggest that a quantum efficiency of greater than unity can be attained on a cw basis.
展示了一种半高全宽带宽为41兆赫兹的超高Q值可调谐光学滤波器。该滤波是通过钠原子蒸汽中的四波混频产生的非简并相位共轭实现的。观察到该滤波器的最大量子效率为4×10⁻³。然而，钠中的简并相位共轭实验表明，在连续波基础上可以实现大于1的量子效率。
