title: Fast, all-optical, zero to π continuously controllable Kerr phase gate.
abstract: We demonstrate a fast Kerr phase gate in a room-temperature (85)Rb vapor using a Raman gain method where the probe wave travels "superluminally". Continuously variable, zero to π radian nonlinear Kerr phase shifts of the probe wave relative to a reference wave have been observed at 333 K. We show rapid manipulation of digitally encoded probe waves using a digitally encoded phase-control light field, demonstrating the capability of the system in information science and telecommunication applications.
authors.affiliation: Physics Measurements Laboratory, National Institute of Standard and Technology, Gaithersburg, Maryland 20899, USA and State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China and Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China.
authors.forename: R B
authors.initials: RB
authors.lastname: Li
authors.affiliation: Physics Measurements Laboratory, National Institute of Standard and Technology, Gaithersburg, Maryland 20899, USA.
authors.forename: L
authors.initials: L
authors.lastname: Deng
authors.affiliation: Physics Measurements Laboratory, National Institute of Standard and Technology, Gaithersburg, Maryland 20899, USA.
authors.forename: E W
authors.initials: EW
authors.lastname: Hagley