title: Fast, optically controlled Kerr phase shifter for digital signal processing.
abstract: We demonstrate an optically controlled Kerr phase shifter using a room-temperature 85Rb vapor operating in a Raman gain scheme. Phase shifts from zero to π relative to an unshifted reference wave are observed, and gated operations are demonstrated. We further demonstrate the versatile digital manipulation of encoded signal light with an encoded phase-control light field using an unbalanced Mach-Zehnder interferometer. Generalizations of this scheme should be capable of full manipulation of a digitized signal field at high speed, opening the door to future applications.
authors: Physical Measurements Laboratory, National Institute of Standard and Technology, Gaithersburg, Maryland 20899, USA.
authors: R B
authors: RB
authors: Li
authors: L
authors: L
authors: Deng
authors: E W
authors: EW
authors: Hagley
authors: M G
authors: MG
authors: Payne
authors: J C
authors: JC
authors: Bienfang
authors: Z H
authors: ZH
authors: Levine