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Proceedings Paper

Single-frequency photonic crystal fiber amplifier with 148-W output power
Author(s): M. Hildebrandt; M. Frede; R. Wilhelm; P. Kwee; B. Willke; D. Kracht
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Paper Abstract

A high-power, single-frequency, ytterbium doped photonic crystal fiber amplifier using a Nd:YAG non-planar ring oscillator seed source is reported. The system delivers up to 148 W of output power and a slope efficiency of 76% with respect to the launched pump power. At maximum output power the amplified spontaneous emission was suppressed by more than 40 dB and a polarization extinction ratio of 28 dB was obtained. Single transverse-mode operation with M2 values better than 1.2 was measured by a standard method. To investigate the real overlap of the photonic crystal fiber transverse-mode with the Gaussian fundamental-mode, sensitive beam quality measurements with a Fabry-Perot ring-cavity premode cleaner will be presented.

Paper Details

Date Published: 21 February 2007
PDF: 8 pages
Proc. SPIE 6453, Fiber Lasers IV: Technology, Systems, and Applications, 64531J (21 February 2007); doi: 10.1117/12.700268
Show Author Affiliations
M. Hildebrandt, Laser Zentrum Hannover e.V. (Germany)
M. Frede, Laser Zentrum Hannover e.V. (Germany)
R. Wilhelm, Laser Zentrum Hannover e.V. (Germany)
P. Kwee, Max-Planck-Institut für Gravitationsphysik, (Germany)
B. Willke, Max-Planck-Institut für Gravitationsphysik, (Germany)
D. Kracht, Laser Zentrum Hannover e.V. (Germany)


Published in SPIE Proceedings Vol. 6453:
Fiber Lasers IV: Technology, Systems, and Applications
Donald J. Harter; Andreas Tünnermann; Jes Broeng; Clifford Headley, Editor(s)

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