title: Flexible bandpass filtering using a coherent optical feedback technique.
abstract: 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.
authors.forename: E
authors.initials: E
authors.lastname: Händler
authors.forename: U
authors.initials: U
authors.lastname: Röder