Brillouin scattering spectra in high-power single-frequency ytterbium doped fiber amplifiers | Zendy

M. Hildebrandt | Zendy; Sebastian Buesche | Zendy; P. Weßels | Zendy; Maik Frede | Zendy; Dietmar Kracht | Zendy

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Brillouin scattering spectra in high-power single-frequency ytterbium doped fiber amplifiers

Author(s) -

M. Hildebrandt,

Sebastian Buesche,

P. Weßels,

Maik Frede,

Dietmar Kracht

Publication year - 2008

Publication title -

optics express

Language(s) - Uncategorized

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.16.015970

Subject(s) - brillouin scattering , optics , brillouin zone , amplifier , ytterbium , materials science , scattering , double clad fiber , fiber laser , optical fiber , polarization maintaining optical fiber , physics , optoelectronics , fiber optic sensor , laser , cmos

We report on theoretical and experimental investigations on spontaneous and stimulated Brillouin scattering during operation of a high-power single-frequency polarization-maintaining ytterbium doped fiber amplifier. For different amplifier configurations with co- and counter-propagating seed and pump radiation the evolution of Brillouin scattering spectra was investigated with a heterodyne detection scheme. Spontaneous Brillouin gain spectra at low powers were additionally investigated using a pump-probe technique. The data obtained from these experiments have been compared with a theoretical model based on coupled intensity equations. A Brillouin scattering suppression has been investigated theoretically and experimentally with externally applied temperature gradients along the fiber resulting in up to 3.5 dB suppression and 115 W of amplifier output power.

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