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15 October 2005 Profile homogenization and monitoring for a multiple 100 J diode-laser pumping system
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Abstract
Multi-pass amplification to the 10 joule level for a femto-second CPA laser system is aimed at diode-pumping Yb3+ doped fluoride-phosphate glass with an energy of 240 J at 940 nm. Collimated pump light of 1000 laser diode bars is focussed onto an a circular glass disk with 28mm diameter. A two-sided ring shaped assembly of diode stacks and attached optics is applied for longitudinal pumping. We developed a computer aided optimization routine for positioning single pump foci with size of 4 × 8mm2 to achieve a smooth homogeneously distributed top-hat shaped pump profile with a diameter of 18 mm. For monitoring purpose the pulse energy of each diode stack is measured with a solar panel placed behind a reflecting mirror.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. Siebold, S. Podleska, J. Hein, R. Bödefeld, M. Hornung, M. Schnepp, and R. Sauerbrey "Profile homogenization and monitoring for a multiple 100 J diode-laser pumping system", Proc. SPIE 5962, Optical Design and Engineering II, 59622I (15 October 2005); https://doi.org/10.1117/12.623777
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