Open AccessRevealing statistical properties of quasi-CW fibre lasers in bandwidth-limited measurements
Author(s) -
Oleg Gorbunov,
Srikanth Sugavanam,
Dmitry V. Churkin
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.028071
Subject(s) - bandwidth (computing) , optics , gaussian , probability density function , laser , physics , computer science , mathematics , statistics , telecommunications , quantum mechanics
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.