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Proceedings Paper

Assessment of high-power kW-class single-diode bars for use in highly efficient pulsed solid state laser systems
Author(s): Antonio Lucianetti; Jan Pilar; Alina Pranovich; Martin Divoky; Tomas Mocek; K. Ertel; Helena Jelinkova; P. Crump; C. Frevert; R. Staske; Götz Erbert; Günther Traenkle
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Paper Abstract

In this work, we present measurements of efficiency-optimized 940 nm diode laser bars with long resonators that are constructed with robustly passivated output facets at the Ferdinand-Braun-Institut (FBH). The measurements were performed at room temperature on a test bench developed at HiLASE Centre, as a function of operating condition. The single-diode bars generated < 1.0 kW when tested with 1 ms pulses at 1-10Hz operating frequency, corresponding to < 1 J per pulse. The maximum electrical-to-optical efficiency was < 60 %, with operating efficiency at 1 kW of < 50%, limited by the ~ 200 μΩ resistance of the bar packaging. In addition, slow axis divergence at 1 kW was below 6° FWHM and spectral width at 1 kW was below 7 nm FWHM, as needed for pumping Yb-doped solid state amplifier crystals.

Paper Details

Date Published: 13 March 2015
PDF: 7 pages
Proc. SPIE 9348, High-Power Diode Laser Technology and Applications XIII, 934811 (13 March 2015); doi: 10.1117/12.2077558
Show Author Affiliations
Antonio Lucianetti, Institute of Physics of the ASCR, v.v.i. (Czech Republic)
Jan Pilar, Institute of Physics of the ASCR, v.v.i. (Czech Republic)
Czech Technical Univ. in Prague (Czech Republic)
Alina Pranovich, Institute of Physics of the ASCR, v.v.i. (Czech Republic)
Czech Technical Univ. in Prague (Czech Republic)
Martin Divoky, Institute of Physics of the ASCR, v.v.i. (Czech Republic)
Tomas Mocek, Institute of Physics of the ASCR, v.v.i. (Czech Republic)
K. Ertel, STFC Rutherford Appleton Lab. (United Kingdom)
Helena Jelinkova, Czech Technical Univ. in Prague (Czech Republic)
P. Crump, Ferdinand-Braun-Institut (Germany)
C. Frevert, Ferdinand-Braun-Institut (Germany)
R. Staske, Ferdinand-Braun-Institut (Germany)
Götz Erbert, Ferdinand-Braun-Institut (Germany)
Günther Traenkle, Ferdinand-Braun-Institut (Germany)


Published in SPIE Proceedings Vol. 9348:
High-Power Diode Laser Technology and Applications XIII
Mark S. Zediker, Editor(s)

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