Diode pumped high power operation of a femtosecond laser inscribed Yb:YAG waveguide laser
T. Calmano1, J. Siebenmorgen1, A.-G. Paschke1, C. Fiebig2, K. Paschke2, G. Erbert2, K. Petermann1 and G. Huber1
Published in:
Opt. Mater. Express, vol. 1, no. 3, pp. 428-433 (2011).
Abstract:
Waveguides were written into single crystalline Yb(7%):YAG with a femtosecond laser. Laser oscillation of the waveguides without external mirrors at an output coupling transmission of 99% was demonstrated. The laser performance of the waveguide lasers, pumped with various light sources, was examined. With an optically pumped semiconductor laser (OPS) as pump source a slope efficiency of 51% regarding incident pump power and a maximum output power of 1.76W could be achieved. By using a high brightness DBR tapered diode laser as pump source the possible miniaturization of the waveguide laser device was demonstrated. With this pump source even 2.35W of output power from the waveguide laser was achieved. The beam quality at highest output power turned out to be excellent with an M2-factor of less than 1.3.
1 Universität Hamburg, Institut für Laser-Physik, Luruper Chaussee 149, 22761 Hamburg, Germany
2 Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Strasse 4, 12489 Berlin, Germany
OCIS codes:
(130.3990) Micro-optical devices; (140.3615) Lasers, ytterbium; (230.7380) Waveguides, channeled.
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