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Proceedings Paper

Growth by liquid phase epitaxy and low-threshold laser oscillation at 2.012 um of a Tm:YAG waveguide laser
Author(s): Corinne Borel; Armelle Rameix; Philippe Thony; Bernard Ferrand; David P. Shepherd; Alan C. Large; Toby J. Warburton; Anne C. Tropper; David C. Hanna
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Paper Abstract

We report the growth by liquid phase epitaxy and laser operation at 2.012 micrometers of Tm:YAG planar waveguides with various concentrations (4 to 10 at %), lengths (3,4 mm) and active layer thicknesses (8 to 30 micrometers ). The pumping source was 1 W GaAlAs SDL diode emitting at 785 nm and the cavity consisted of 2 plane mirrors butted to the waveguide endfaces. Initial results have been obtained with a 6% doped, 4 mm long and 14.6 micrometers thick, Tm:YAG epilayer: Thresholds occurred at respectively 60 mW and 300 mW of incident power (48 mW and 136 mW of absorbed power taking in account pump feedback by the output couplers) for output mirrors transmissions of 2% and 12% respectively. Slope efficiencies of 32% and 48% with respect to absorbed power have been achieved with these output transmissions. With Ti:sapphire pumping an using 1.8% output coupling, laser threshold as low as approximately equals 10 mW and slop efficiencies of approximately equals 30% have been obtained in a range of different Tm:YAG waveguides. This performance is comparable to the best results published until now for bulk crystals.

Paper Details

Date Published: 17 April 1995
PDF: 9 pages
Proc. SPIE 2380, UV and Visible Lasers and Laser Crystal Growth, (17 April 1995); doi: 10.1117/12.206948
Show Author Affiliations
Corinne Borel, Ctr. d'Etudes Nucleaires de Grenoble (France)
Armelle Rameix, Ctr. d'Etudes Nucleaires de Grenoble (France)
Philippe Thony, Ctr. d'Etudes Nucleaires de Grenoble (France)
Bernard Ferrand, Ctr. d'Etudes Nucleaires de Grenoble (France)
David P. Shepherd, Univ. of Southampton (United Kingdom)
Alan C. Large, Univ. of Southampton (United Kingdom)
Toby J. Warburton, Univ. of Southampton (United Kingdom)
Anne C. Tropper, Univ. of Southampton (United Kingdom)
David C. Hanna, Univ. of Southampton (United Kingdom)

Published in SPIE Proceedings Vol. 2380:
UV and Visible Lasers and Laser Crystal Growth
Richard Scheps; Milan R. Kokta, Editor(s)

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