Share Email Print
cover

Proceedings Paper

12 mJ pulse energy 8-channel divided-pulse ultrafast fiber-laser system
Author(s): Michael Mueller; Marco Kienel; Arno Klenke; Thomas Gottschall; Evgeny Shestaev; Marco Plötner; Jena Limpert; Andres Tünnermann
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

State-of-the-art ultrafast fiber lasers currently are limited in peak power by excessive nonlinearity and in average power by modal instabilities. Coherent beam combination in space and time is a successful strategy to continue power scaling by circumventing these limitations. Following this approach, we demonstrate an ultrafast fiber-laser system featuring spatial beam combination of 8 amplifier channels and temporal combination of a burst comprising 4 pulses. Active phase stabilization of this 10-armed interferometer is achieved using LOCSET and Hänsch-Couillaud techniques. The system delivers 1 kW average power at 1 mJ pulse energy, being limited by pump power, and delivers 12 mJ pulse energy at 700 W average power, being limited by optically induced damage. The system efficiency is 91% and 78%, respectively, which is due to inequalities of nonlinearity between the amplifier channels and to inequality of power and nonlinearity between the pulses within the burst. In all cases, the pulse duration is ~260 fs and the M2-value is better than 1.2. Further power scaling is possible using more amplifier channels and longer pulse bursts.

Paper Details

Date Published: 22 February 2017
PDF: 5 pages
Proc. SPIE 10083, Fiber Lasers XIV: Technology and Systems, 1008302 (22 February 2017); doi: 10.1117/12.2252335
Show Author Affiliations
Michael Mueller, Friedrich-Schiller-Univ. Jena (Germany)
Marco Kienel, Friedrich-Schiller-Univ. Jena (Germany)
Helmholtz-Institute Jena (Germany)
Arno Klenke, Friedrich-Schiller-Univ. Jena (Germany)
Helmholtz-Institute Jena (Germany)
Thomas Gottschall, Friedrich-Schiller-Univ. Jena (Germany)
Evgeny Shestaev, Friedrich-Schiller-Univ. Jena (Germany)
Marco Plötner, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
Jena Limpert, Friedrich-Schiller-Univ. Jena (Germany)
Helmholtz-Institute Jena (Germany)
Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
Andres Tünnermann, Friedrich-Schiller-Univ. Jena (Germany)
Helmholtz-Institute Jena (Germany)
Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)


Published in SPIE Proceedings Vol. 10083:
Fiber Lasers XIV: Technology and Systems
Craig A. Robin; Ingmar Hartl, Editor(s)

© SPIE. Terms of Use
Back to Top