Polarization independent phase demodulation using photorefractive two-wave mixing

Philippe Delaye (1) , Alain Blouin (2) , Denis Drolet (2) , Jean-Pierre Monchalin (2) , Louis-Anne de Montmorillon (1) , Gérald Roosen (1)

1 Laboratoire Charles Fabry de l'Institut d'Optique / Manolia
2 Industrial Materials Institute (NRCC)

We describe both theoretically and experimentally a polarization independent interferometric adaptive photodetector based on photorefractive two-wave mixing. The configuration is based on the simultaneous recording of two independent gratings in a single photorefractive crystal. Applied to the detection of ultrasonic signals, this interferometric photodetector operates with depolarized beams issued from multimode fibers and gives a detection limit close to the ultimate.

Domains: Optics [physics.optics]

Philippe Delaye, Alain Blouin, Denis Drolet, Jean-Pierre Monchalin, Louis-Anne de Montmorillon, et al.. Polarization independent phase demodulation using photorefractive two-wave mixing. Applied Physics Letters, 1999, 74 (21), pp.3087-3089. ⟨10.1063/1.124070⟩. ⟨hal-00673451⟩