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Fast, Optically Controlled Kerr Phase Shifter for Digital Signal Processing



Runbing Li, Lu Deng, Edward W. Hagley, Joshua Bienfang, Zachary H. Levine, Marvin G. Payne


We demonstrate an optically controlled Kerr phase shifter using a room-temperature Rb85 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.
Optics Letters


Kerr phase gate, quantum information


Li, R. , Deng, L. , Hagley, E. , Bienfang, J. , Levine, Z. and Payne, M. (2013), Fast, Optically Controlled Kerr Phase Shifter for Digital Signal Processing, Optics Letters, [online],, (Accessed April 14, 2024)
Created April 17, 2013, Updated October 12, 2021