Noise suppression in photorefractive image amplifiers

Noise suppression in photorefractive image amplifiers

We propose and experimentally demonstrate a simple technique capable of significantly enhancing the signal-to-noise ratio of photorefractive amplifiers. The optical noise due to amplified scattered light and multiple interface reflections is removed by performing two-wave mixing in off-axis-rotating...

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Veröffentlicht in:Optics letters 1989-11, Vol.14 (22), p.1275-1277
Hauptverfasser: RAJBENBACH, H, DELBOULBE, A, HUIGNARD, J. P
Format: Artikel
Sprache:eng
Schlagworte:
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Imaging and optical processing
Optics
Physics
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Beschreibung
Zusammenfassung:We propose and experimentally demonstrate a simple technique capable of significantly enhancing the signal-to-noise ratio of photorefractive amplifiers. The optical noise due to amplified scattered light and multiple interface reflections is removed by performing two-wave mixing in off-axis-rotating BaTiO(3) and Bi(12)SiO(20) crystals. A 20-fold improvement of the signal-to-noise ratio is achieved, and virtually noise-free image amplifiers are demonstrated.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.14.001275