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Proceedings Paper

New concepts for compact diode-pumped femtosecond lasers
Author(s): Kai Gaebel; P. Russbueldt; G. Rotarius; H. Bette; Rainer Lebert; Keming Du; Peter Loosen; Reinhart Poprawe; Adriaan Valster
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Paper Abstract

We report the successful implementation of Gires-Tournois and chirped mirrors in a diode-pumped, Kerr-lens mode-locked Cr:LiSGaF laser. The laser delivered 30 mW of 79 fs, nearly transform limited pulses at 855 nm and 90 MHz repetition rate. The mirror-dispersion controlled cavity is compared to our prism setup and pulse width limitations in diode pumped Cr:LiSGaF/Cr:LiSAF lasers are identified. Mode matching calculations of pump beam and cavity mode are presented to optimize low threshold, highly efficient fs-operation. Following this analysis a compact prismless design of roughly shoe box size is suggested, which incorporates an additional high n2 element to enhance stability.

Paper Details

Date Published: 18 August 1997
PDF: 7 pages
Proc. SPIE 3097, Lasers in Material Processing, (18 August 1997); doi: 10.1117/12.281139
Show Author Affiliations
Kai Gaebel, Rheinisch-Westfaelische Technische Hochschule Aachen (Germany)
P. Russbueldt, Fraunhofer-Institut fuer Lasertechnik (Germany)
G. Rotarius, Fraunhofer-Institut fuer Lasertechnik (Germany)
H. Bette, Rheinisch-Westfaelische Technische Hochschule Aachen (Germany)
Rainer Lebert, Rheinisch-Westfaelische Technische Hochschule Aachen (Germany)
Keming Du, Fraunhofer-Institut fuer Lasertechnik (Germany)
Peter Loosen, Fraunhofer-Institut fuer Lasertechnik (Germany)
Reinhart Poprawe, Fraunhofer-Institut fuer Lasertechnik (Germany)
Adriaan Valster, Philips Research Labs. (Netherlands)

Published in SPIE Proceedings Vol. 3097:
Lasers in Material Processing
Leo H. J. F. Beckmann, Editor(s)

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