title: Narrow optical bandpass filter via nearly degenerate four-wave mixing.
abstract: It is shown that a nearly degenerate four-wave mixing process is capable of yielding a real-time optical bandpass filter. The filter has a large field of view and is capable of providing an amplified bandpass. Moreover, the conjugate nature of the output field can be utilized to increase the signal-to-noise ratio of the device. For a 1-cm interaction length in a nondispersive medium, the optical bandpass at 5000 A can be varied from ~9 GHz down to the linewidth of the exciting laser.
authors.forename: D M
authors.initials: DM
authors.lastname: Pepper
authors.forename: R L
authors.initials: RL
authors.lastname: Abrams