Balanced detection for interferometry with a noisy source.
Rev Sci Instrum
; 83(6): 063705, 2012 Jun.
Article
em En
| MEDLINE
| ID: mdl-22755632
ABSTRACT
Optical properties of nanostructures depend on size, shape, material, and local environment. These characteristics can be probed interferometrically, given a broadband source. However, broadband supercontinuum sources are intrinsically noisy, limiting the measurement sensitivity. In this article we describe the application of an auto-balancing technique to reduce the noise in a broadband supercontinuum source, thus increasing the signal to noise ratio. We show a noise reduction of 41 dB allowing optical powers as small as 0.01 pW to be interferometrically detected with a 5 ms integration time.
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1
Coleções:
01-internacional
Base de dados:
MEDLINE
Tipo de estudo:
Diagnostic_studies
Idioma:
En
Revista:
Rev Sci Instrum
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Reino Unido