Highly efficient diode-stack, end-pumped Nd:YAG slab laser with symmetrized beam quality

An efficient high-power cw Nd:YAG slab laser, partially end pumped by diode-laser stacks, and a novel beam-shaping technique are reported. The optical efficiency amounted to 44 %, and the slope efficiency amounted to 55 %. Introducing an intracavity Brewster plate to polarize the laser beam, we obta...

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Veröffentlicht in:	Applied Optics 1997-08, Vol.36 (24), p.5872-5875
Hauptverfasser:	Liao, Y, Du, K, Falter, S, Zhang, J, Quade, M, Loosen, P, Poprawe, R
Format:	Artikel
Sprache:	eng
Schlagworte:	BEAM PROFILES BEAM SHAPING DESIGN EFFICIENCY ENGINEERING NOT INCLUDED IN OTHER CATEGORIES INFRARED SPECTRA NEODYMIUM LASERS POWER RANGE 01-10 W POWER RANGE 10-100 W
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Zusammenfassung:	An efficient high-power cw Nd:YAG slab laser, partially end pumped by diode-laser stacks, and a novel beam-shaping technique are reported. The optical efficiency amounted to 44 %, and the slope efficiency amounted to 55 %. Introducing an intracavity Brewster plate to polarize the laser beam, we obtained an optical efficiency of 35 % and a slope efficiency of 41 %. The output beam was rectangular and the beam quality asymmetric in two orthogonal directions. To equalize the beam quality, we introduced a step-mirror beam-shaping technique. The beam-shaping technique and the results obtained are discussed.
ISSN:	1559-128X 0003-6935 1539-4522
DOI:	10.1364/AO.36.005872