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Proceedings Paper

30 W peak-power 3 ns pulse-width operation of a 2 µm electro-optically cavity-dumped VECSEL
Author(s): Sebastian Kaspar; Marcel Rattunde; Tino Töpper; Steffen Adler; Ulrich T. Schwarz; Christian Manz; Klaus Köhler; Joachim Wagner
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Paper Abstract

In this paper electro-optic cavity dumping of a 2 μm semiconductor disk laser is reported. Using this approach, pulsed mode operation with 3 ns pulse length, 30 W of peak power and pulse repetition frequencies between 87 kHz and 1 MHz has been achieved. For cavity dumping, a birefringent polarizer prism was inserted into the V-shaped external cavity formed by high-reflectivity mirrors, in order to establish a linear polarization of the intra-cavity field. The polarization of the intra-cavity field could be rotated by 90° when applying a voltage to a Pockels cell placed inside the cavity close to the end mirror. Photons with rotated polarization undergo then total internal reflection inside the polarizing prism and are coupled out of the cavity sideways. Furthermore, a model based on standard laser rate equations has been developed, which excellently reproduces the measured pulse shape and temporal evolution of the intracavity power. Based on this model, we have studied the pulse length and shape as well as peak power and pulse energy as a function of cavity length in order to explore routes for further increasing peak output power and pulse energy.

Paper Details

Date Published: 18 February 2013
PDF: 8 pages
Proc. SPIE 8606, Vertical External Cavity Surface Emitting Lasers (VECSELs) III, 86060B (18 February 2013); doi: 10.1117/12.2001810
Show Author Affiliations
Sebastian Kaspar, Fraunhofer-Institut für Angewandte Festkörperphysik (Germany)
Marcel Rattunde, Fraunhofer-Institut für Angewandte Festkörperphysik (Germany)
Tino Töpper, Fraunhofer-Institut für Angewandte Festkörperphysik (Germany)
Steffen Adler, Fraunhofer-Institut für Angewandte Festkörperphysik (Germany)
Ulrich T. Schwarz, Fraunhofer-Institut für Angewandte Festkörperphysik (Germany)
Christian Manz, Fraunhofer-Institut für Angewandte Festkörperphysik (Germany)
Klaus Köhler, Fraunhofer-Institut für Angewandte Festkörperphysik (Germany)
Joachim Wagner, Fraunhofer-Institut für Angewandte Festkörperphysik (Germany)


Published in SPIE Proceedings Vol. 8606:
Vertical External Cavity Surface Emitting Lasers (VECSELs) III
Jennifer E. Hastie, Editor(s)

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