Händler E, Röder U
Appl Opt. 1979 Aug 15;18(16):2787-91. doi: 10.1364/AO.18.002787.
A certain flexibility in an optical filter experiment can be achieved with coherent optical feedback because the transfer function of such systems depends on an adjustable phase. With a simple filter in the optical system, a spatial bandpass characteristic is attainable. The tuning frequency of the bandpass is a function of the phase of the feedback signal. The variable bandpass effect is demonstrated with different inputs.
在光学滤波器实验中，利用相干光反馈可以实现一定的灵活性，因为此类系统的传递函数取决于一个可调节的相位。在光学系统中使用一个简单的滤波器，就可以获得空间带通特性。带通的调谐频率是反馈信号相位的函数。通过不同的输入展示了可变带通效应。
