Optical phase to amplitude demodulation

Details Optical phase to amplitude demodulation Optical phase to amplitude demodulation

1989-10-05

1991-01-08

Moskowitz, Nelson

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455611, G03H 102, H01S 310

Patent

active

049830244

ABSTRACT:
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=n.sub.0 +n.sub.2 I, where n is the local refractive index of the medium at a point of interest, n.sub.0 is the linear refractive index of the medium, n.sub.2 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.

REFERENCES:
patent: 4767195 (1988-08-01), Pepper
patent: 4881788 (1989-11-01), Doran
Champagne et al., "Applications of Opt. Phase . . . Communications", Proc. SPIE, vol. 988, pp. 336-341, (Symp. 9/9/88), Abst. Herewith.
Boothroyd et al.; "Temporal Development . . . Mixing"; J. Phys. D., vol. 16, #8, pp. 465-468, 8/14/83, Abst. therewith.
Boothroyd et al.; "Two-Wave Mixing . . . Absorbers"; 8/25/88; Troy, N.Y. Mtg. of Topical Mtg Nonlineary Opt. Prop. of Mat.; Republished 4/89 in S. Opt. Soc. Am. B, Opt. Phys., vol. 6, #4, pp. 766-771, 4/89.
Piche et al.; "Conversion of Phase Mod . . . Mirror"; Opt. Comm., vol. 65, #2, pp. 146-150, 1/15/88; Abst Only Supplied Herewith.
Boothroyd, S. A.; "Interaction of Coherent Radiation . . . Media"; Dissertation, Univ. of Wales, Swensea.

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