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Proceedings Paper

Coherent combining of ultrashort fiber-amplified laser pulses
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Paper Abstract

We report on a novel concept to scale the performance of ultra-fast lasers by means of coherent combination. Pulses from a single mode-locked laser are distributed to a number of spatially separated fiber amplifiers and coherently combined after amplification. The splitting and combination process is based on the polarization combining technique using polarization cubes. A Hansch-Couillaud detector measures the polarization state of the combined beam. The error signal (deviation from linear polarization) is used to stabilize the optical path lengths in the different channels with a piezo mounted mirror. In a proof-of-principle experiment the combination of two femtosecond fiber-based amplifiers in a CPA systems is presented. A combining efficiency as high as 97% has been achieved. Additional measurements were carried out to investigate the stability of the system. The concept offers a unique scaling potential and can be applied to all ultrafast amplification schemes independent of the architecture of the gain medium.

Paper Details

Date Published: 21 February 2011
PDF: 7 pages
Proc. SPIE 7914, Fiber Lasers VIII: Technology, Systems, and Applications, 79141D (21 February 2011); doi: 10.1117/12.874769
Show Author Affiliations
Enrico Seise, Friedrich-Schiller-Univ. Jena (Germany)
Helmholtz-Institute Jena (Germany)
Arno Klenke, Friedrich-Schiller-Univ. Jena (Germany)
Helmholtz-Institute Jena (Germany)
Sven Breitkopf, Friedrich-Schiller-Univ. Jena (Germany)
Marco Plötner, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
Jens Limpert, Friedrich-Schiller-Univ. Jena (Germany)
Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
Helmholtz-Institute Jena (Germany)
Andreas Tünnermann, Friedrich-Schiller-Univ. Jena (Germany)
Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
Helmholtz-Institute Jena (Germany)


Published in SPIE Proceedings Vol. 7914:
Fiber Lasers VIII: Technology, Systems, and Applications
Jay W. Dawson, Editor(s)

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