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Proceedings Paper

High-power cw Nd:YAG lasers pumped with fiber-coupled diode lasers
Author(s): Dirk Golla; S. Knoke; Wolfram Schoene; M. Bode; Andreas Tuennermann; Herbert Welling
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Paper Abstract

We report on diode laser side-pumped, cw Nd:YAG rod lasers operating at output powers of several hundred Watts. Applying fiber-coupled diode lasers as pump sources, linear pump power densities of more than 200 W/cm are attainable. A nearly free adjustment of the pump light distribution inside the laseractive medium allows a significant decrease of thermally- induced effects and minimizes aberration-related losses. In multimode operation at 1064 nm, output powers of more than 320 W cw are observed. Applying an improved resonator design, output powers of more than 80 W in TEM00 mode operation are realized with an optical- to-optical efficiency of more than 20%. Frequency conversion into the visible spectral range with optical-to-optical efficiencies (green power to pump power) of 5% is realized by intracavity second harmonic generation in KTP crystals. Thermal properties and laser performance of laser systems excited by fiber-coupled diode lasers will be discussed.

Paper Details

Date Published: 10 May 1996
PDF: 9 pages
Proc. SPIE 2700, Nonlinear Frequency Generation and Conversion, (10 May 1996); doi: 10.1117/12.239662
Show Author Affiliations
Dirk Golla, Laser Zentrum Hannover eV (Germany)
S. Knoke, Laser Zentrum Hannover eV (Germany)
Wolfram Schoene, Laser Zentrum Hannover eV (Germany)
M. Bode, Laser Zentrum Hannover eV (Germany)
Andreas Tuennermann, Laser Zentrum Hannover eV (Germany)
Herbert Welling, Laser Zentrum Hannover eV (Germany)

Published in SPIE Proceedings Vol. 2700:
Nonlinear Frequency Generation and Conversion
Mool C. Gupta; William J. Kozlovsky; David C. MacPherson, Editor(s)

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