Profile homogenization and monitoring for a multiple 100 J diode-laser pumping system

M. Siebold; S. Podleska; J. Hein; R. Bödefeld; M. Hornung; M. Schnepp; R. Sauerbrey

doi:10.1117/12.623777

15 October 2005 Profile homogenization and monitoring for a multiple 100 J diode-laser pumping system

M. Siebold, S. Podleska, J. Hein, R. Bödefeld, M. Hornung, M. Schnepp, R. Sauerbrey

Proceedings Volume 5962, Optical Design and Engineering II; 59622I (2005) https://doi.org/10.1117/12.623777
Event: Optical Systems Design 2005, 2005, Jena, Germany

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.

Citation Download Citation

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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