Optical phase to amplitude demodulation

摘要

A method of optical phase to amplitude demodulation comprises intersecting two mutually coherent beams of light inside a Kerr medium. One of the beams is unmodulated and the other is phase modulated. The Kerr medium is non-linear and is characterized by an equation n=n0+n2I, where n is the local refractive index of the medium at a point of interest, n0 is the linear refractive index of the medium, n2 is a nonlinear refractive index of the medium and I is the light intensity at the point of interests. An amplitude modulated output beam is generated.