Statistical physics of power fluctuations in mode locked lasers

Details Statistical physics of power fluctuations in mode locked lasers Statistical physics of power fluctuations in mode locked lasers

2008-12-14

arxiv.org/abs/0812.2629v1

Physics

Condensed Matter

Statistical Mechanics

7 pages, 1 figure, RevTeX

Scientific paper

10.1103/PhysRevE.79.031126

We present an analysis of the power fluctuations in the statistical steady state of a passively mode locked laser. We use statistical light-mode theory to map this problem to that of fluctuations in a reference equilibrium statistical physics problem, and in this way study the fluctuations non-perturbatively. The power fluctuations, being non-critical, are Gaussian and proportional in amplitude to the inverse square root of the number of degrees of freedom. We calculate explicit analytic expressions for the covariance matrix of the overall, pulse and cw power variables, providing complete information on the single-time power distribution in the laser, and derive a set of fluctuation-dissipation relations between them and the susceptibilities of the steady-state quantities.

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