LOW-NOISE OPTICAL WAVE AMPLIFICATION DEVICE

The invention relates to a low-noise amplification device of an optical wave. Signal wave (Fs) to be amplified interferes with a pump wave (Fp) in such a nonlinear medium (1) as a photorefractive crystal. To reduce the noise considerably, even to eliminate it, the establishing of noise-generating in...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	RAJBENBACH, HENRI, HUIGNARD, JEAN-PIERRE
Format:	Patent
Sprache:	eng
Schlagworte:	DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING FREQUENCY-CHANGING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	The invention relates to a low-noise amplification device of an optical wave. Signal wave (Fs) to be amplified interferes with a pump wave (Fp) in such a nonlinear medium (1) as a photorefractive crystal. To reduce the noise considerably, even to eliminate it, the establishing of noise-generating interferences therefore is prevented by moving, by rotation around an axis O, the nonlinear medium.