Share Email Print

Proceedings Paper

High-average power second harmonic generation of femtosecond fiber lasers
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

We present second harmonic generation of a high average power, high energy femtosecond Yb doped fiber chirped pulse amplifier. This system is operated at various repetition rates at a central wavelength of 1040 nm. After two pre-amplification stages a main amplifier is used to achieve the required pulse energy for efficient second harmonic generation. It is comprised of a 1.2 m long photonic crystal fiber with a mode field diameter of 45 μm. A dielectric grating based compressor is used for compression to a pulse duration of about 406 fs. Second harmonic generation is then achieved in a 500 μm thick BBO crystal. The conversion efficiency of the second harmonic generation remained almost constant at >60 % for all repetition rates and average power levels. At 5.25 MHz the highest average power of 135 W at 520 nm was achieved. In addition this comes with an excellent beam quality which is validated by a measured M2 < 1.2.

Paper Details

Date Published: 10 February 2011
PDF: 6 pages
Proc. SPIE 7914, Fiber Lasers VIII: Technology, Systems, and Applications, 79140S (10 February 2011); doi: 10.1117/12.874872
Show Author Affiliations
S. Hädrich, Friedrich-Schiller-Univ. Jena (Germany)
Helmholtz-Institute Jena (Germany)
J. Rothhardt, Friedrich-Schiller-Univ. Jena (Germany)
Helmholtz-Institute Jena (Germany)
T. Eidam, Friedrich-Schiller-Univ. Jena (Germany)
Helmholtz-Institute Jena (Germany)
T. Gottschall, Friedrich-Schiller-Univ. Jena (Germany)
J. Limpert, Friedrich-Schiller-Univ. Jena (Germany)
Helmholtz-Institute Jena (Germany)
A. Tünnermann, Friedrich-Schiller-Univ. Jena (Germany)
Helmholtz-Institute Jena (Germany)
Fraunhofer Insitute for Applied Optics and Precision Engineering (Germany)

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

© SPIE. Terms of Use
Back to Top