Low-noise photorefractive amplification and detection of very weak signal beams

Low-noise photorefractive amplification and detection of very weak signal beams

We present theoretical and experimental analyses of the signal-to-noise ratio (SNR) of photorefractive two-wave mixing detection that uses BaTiO(3). The influence of beam fanning is taken into account in the detection process. Different known methods to enhance the SNR of the detection are theoretic...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Optics letters 1995-03, Vol.20 (5), p.447-449
Hauptverfasser: Breugnot, S, Rajbenbach, H, Defour, M, Huignard, J P
Format: Artikel
Sprache:eng
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:We present theoretical and experimental analyses of the signal-to-noise ratio (SNR) of photorefractive two-wave mixing detection that uses BaTiO(3). The influence of beam fanning is taken into account in the detection process. Different known methods to enhance the SNR of the detection are theoretically and experimentally compared. A 10-fold improvement of the SNR is obtained, and the detection of a 1-pW signal intensity for a SNR of 50 is achieved for two of them.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.20.000447