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Proceedings Paper

Latest advances in high brightness disk lasers
Author(s): Vincent Kuhn; Tina Gottwald; Christian Stolzenburg; Sven-Silvius Schad; Alexander Killi; Tracey Ryba
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Paper Abstract

In the last decade diode pumped solid state lasers have become an important tool for many industrial materials processing applications. They combine ease of operation with efficiency, robustness and low cost. This paper will give insight in latest progress in disk laser technology ranging from kW-class CW-Lasers over frequency converted lasers to ultra-short pulsed lasers.

The disk laser enables high beam quality at high average power and at high peak power at the same time. The power from a single disk was scaled from 1 kW around the year 2000 up to more than 10 kW nowadays. Recently was demonstrated more than 4 kW of average power from a single disk close to fundamental mode beam quality (M²=1.38). Coupling of multiple disks in a common resonator results in even higher power. As an example we show 20 kW extracted from two disks of a common resonator.

The disk also reduces optical nonlinearities making it ideally suited for short and ultrashort pulsed lasers. In a joint project between TRUMPF and IFSW Stuttgart more than 1.3 kW of average power at ps pulse duration and exceptionally good beam quality was recently demonstrated.

The extremely low saturated gain makes the disk laser ideal for internal frequency conversion. We show >1 kW average power and >6 kW peak power in multi ms pulsed regime from an internally frequency doubled disk laser emitting at 515 nm (green). Also external frequency conversion can be done efficiently with ns pulses. >500 W of average UV power was demonstrated.

Paper Details

Date Published: 20 February 2015
PDF: 7 pages
Proc. SPIE 9342, Solid State Lasers XXIV: Technology and Devices, 93420Y (20 February 2015); doi: 10.1117/12.2079876
Show Author Affiliations
Vincent Kuhn, TRUMPF Laser GmbH & Co. KG (Germany)
Tina Gottwald, TRUMPF Laser GmbH & Co. KG (Germany)
Christian Stolzenburg, TRUMPF Laser GmbH & Co. KG (Germany)
Sven-Silvius Schad, TRUMPF Laser GmbH & Co. KG (Germany)
Alexander Killi, TRUMPF Laser GmbH & Co. KG (Germany)
Tracey Ryba, TRUMPF Inc. (United States)


Published in SPIE Proceedings Vol. 9342:
Solid State Lasers XXIV: Technology and Devices
W. Andrew Clarkson; Ramesh K. Shori, Editor(s)

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