Revealing statistical properties of quasi-CW fibre lasers in bandwidth-limited measurements

We introduce a general technique how to reveal in experiments of limited electrical bandwidth which is lower than the optical bandwidth of the optical signal under study, whether the statistical properties of the light source obey Gaussian distribution or mode correlations do exist. To do that one n...

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Bibliographic Details
Published in:Optics express 2014-11, Vol.22 (23), p.28071-28076
Main Authors: Gorbunov, O A, Sugavanam, S, Churkin, D V
Format: Article
Language:English
Subjects:
Biometry - methods
Equipment Design
Lasers
Light
Models, Theoretical
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Summary:We introduce a general technique how to reveal in experiments of limited electrical bandwidth which is lower than the optical bandwidth of the optical signal under study, whether the statistical properties of the light source obey Gaussian distribution or mode correlations do exist. To do that one needs to perform measurements by decreasing the measurement bandwidth. We develop a simple model of bandwidth-limited measurements and predict universal laws how intensity probability density function and intensity auto-correlation function of ideal completely stochastic source of Gaussian statistics depend on limited measurement bandwidth and measurement noise level. Results of experimental investigation are in good agreement with model predictions. In particular, we reveal partial mode correlations in the radiation of quasi-CW Raman fibre laser.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.22.028071