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  4. Experimental validation of a simple approximation to determine the linewidth of a laser from its frequency noise spectrum
 
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Experimental validation of a simple approximation to determine the linewidth of a laser from its frequency noise spectrum

Auteur(s)
Bucalovic, Nikola 
Institut de physique 
Dolgovskiy, Vladimir 
Institut de physique 
Schori, Christian 
Institut de physique 
Thomann, Pierre 
Institut de physique 
Di Domenico, Gianni 
Institut de physique 
Schilt, Stephane 
Institut de physique 
Date de parution
2012
In
Applied Optics, Optical Society of America, 2012/51/20/4582-4588
Résumé
Laser frequency fluctuations can be characterized either comprehensively by the frequency noise spectrum or in a simple but incomplete manner by the laser linewidth. A formal relation exists to calculate the linewidth from the frequency noise spectrum, but it is laborious to apply in practice. We recently proposed a much simpler geometrical approximation applicable to any arbitrary frequency noise spectrum. Here we present an experimental validation of this approximation using laser sources of different spectral characteristics. For each of them, we measured both the frequency noise spectrum to calculate the approximate linewidth and the actual linewidth directly. We observe a very good agreement between the approximate and directly measured linewidths over a broad range of values (from kilohertz to megahertz) and for significantly different laser line shapes.
Identifiants
https://libra.unine.ch/handle/123456789/9937
_
10.1364/AO.51.004582
Type de publication
journal article
Dossier(s) à télécharger
 main article: Bucalovic_Nikola_-_Experimental_validation_of_a_simple_approximation_20120703.pdf (553.22 KB)
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