Open AccessObservation of high-contrast, fast intensity noise of a continuous wave Raman fiber laser
Author(s) -
Jochen Schröder,
Stéphane Coen
Publication year - 2009
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.17.016444
Subject(s) - supercontinuum , optics , fiber laser , raman spectroscopy , continuous wave , laser , materials science , relative intensity noise , raman amplification , noise (video) , signal (programming language) , raman scattering , physics , optical fiber , photonic crystal fiber , semiconductor laser theory , artificial intelligence , computer science , image (mathematics) , programming language
We investigate the intensity noise of a continuous-wave Raman fiber laser based on a novel technique where the noise is sampled with a low repetition rate signal in a low walk-off Raman amplifier configuration. With this method, we experimentally demonstrate that continuous-wave Raman fiber lasers exhibit high contrast intensity fluctuations on a timescale of several tens to hundreds of GHz. In fact, the power of the Raman laser fluctuates between nearly zero and a high multiple of the average power. Numerical simulations are used to study the role of pump depletion on the noise transfer process. Our study validates models of pumps used in some recent continuous wave supercontinuum generation simulations.