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Efficient, green laser based on a blue-diode pumped rare-earth-doped fluoride crystal in an extremely short resonator

: Strotkamp, M.; Schwarz, T.; Jungbluth, B.; Faidel, H.; Leers, M.

Volltext urn:nbn:de:0011-n-1374658 (3.0 MByte PDF)
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Copyright 2010 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Erstellt am: 28.4.2012

Clarkson, W.A. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Solid state lasers XIX. Technology and devices : 24 - 28 January 2010, San Francisco, California, United States
Bellingham, WA: SPIE, 2010 (Proceedings of SPIE 7578)
ISBN: 978-0-8194-7974-7
Paper 75780O, 7 S.
Conference "Solid State Lasers - Technology and Devices" <19, 2010, San Francisco/Calif.>
Konferenzbeitrag, Elektronische Publikation
Fraunhofer ILT ()

The green cw laser presented in this work is realized by means of a Pr:YLF crystal emitting at 523 nm that is pumped by a blue GaN laser diode in an extremely short resonator. With a 500 mW-diode a laser has been achieved with M2 = 1, a slope of 40 % and an output power of 140mW with an absorbed pump power of 410 mW which results in an electrooptical efficiency of 6.5 %. Despite the reduced overlap with a 1 W-diode the output power rises to 290 mW with an absorbed pump power of 850 mW and the M2 increases only slightly. Based on these results a compact laser package has been accomplished using a monolithic micro optics for the beam shaping of the diode light and joining all components with a low-shrinkage adhesive on a common base plate. In a first test of the alignment strategy a laser with an output power of 92 mW has been achieved by means of the 500 mW pump power.