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Improved performance of nonlinear CPA-systems by spectral clipping

: Seise, E.; Schimpf, D.N.; Limpert, J.; Tünnermann, A.


Tankala, K. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Fiber lasers VII. Technology, systems, and applications : 25 - 28 January 2010, San Francisco, California, United States; at SPIE Photonics West
Bellingham, WA: SPIE, 2010 (Proceedings of SPIE 7580)
ISBN: 978-0-8194-7976-1
Paper 75800X
Conference "Fiber Lasers - Technology, Systems, and Applications" <7, 2010, San Francisco/Calif.>
Photonics West Conference <2010, San Franciso/Calif.>
Conference Paper
Fraunhofer IOF ()
nonlinear CPA-system; spectral clipping; fiber amplifier; high energy amplifier

In this work we present a new method for peak-power scaling in nonlinear CPA-systems. By clipping the tails of the spectrum we demonstrate pulse quality enhancement and an increase of peak-power at the output of the CPA-system. A theoretical model allows us to determine an optimal ratio between the spectral clipping bandwidth and the pulse bandwidth at a certain B-integral. Additionally, a simple redesign of a grating based stretcher unit, applying our new spectral clipping technique, would significantly increase the output peak-power of such nonlinear CPA-systems by a factor up to six due to the higher stretching ratio.