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Proceedings Paper

Fiber-coupled diode laser systems up to 2-kW output power
Author(s): Friedhelm Dorsch; Veit Bluemel; Matthias Schroeder; Dirk Lorenzen; Petra Hennig; Detlev Wolff
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Paper Abstract

High power diode laser bars and stacks are of great interest in industrial applications due to their high electro-optical efficiency, their small type of construction and maintenance free operation. With highly sophisticated beam shaping optics diode lasers can be used as pumping sources for solid state and fiber lasers and direct for material processing, e.g. welding, soldering and marking metals. We have developed different fiber coupled diode laser systems with output power up to greater than 2 kW cw into a spot 0 1.0 mm (power density greater than 250 kW/cm2) and systems with output power 170 W cw into a spot 0 0.38 mm (power density about 150 kW/cm2). The 2 kW system operates with a 0 1.5 mm fiber (N.A. 0.32) and consists of polarization and wavelength coupled stacks with an overall electro-optical efficiency of 23%. The smaller system operates either with a 0 0.6 mm (N.A. 0.22) or 0 0.4 mm (N.A. 0.33) fiber and consists of a single stack. Polarization and wavelength coupling will be realized in future. The overall electro-optical efficiency is about 27%.

Paper Details

Date Published: 29 March 2000
PDF: 8 pages
Proc. SPIE 3945, Laser Diodes and LEDs in Industrial, Measurement, Imaging, and Sensors Applications II; Testing, Packaging, and Reliability of Semiconductor Lasers V, (29 March 2000); doi: 10.1117/12.380554
Show Author Affiliations
Friedhelm Dorsch, Jenoptik Laserdiode GmbH (Germany)
Veit Bluemel, Jenoptik Laserdiode GmbH (Germany)
Matthias Schroeder, Jenoptik Laserdiode GmbH (Germany)
Dirk Lorenzen, Jenoptik Laserdiode GmbH (Germany)
Petra Hennig, Jenoptik Laserdiode GmbH (Germany)
Detlev Wolff, Jenoptik Laserdiode GmbH (Germany)


Published in SPIE Proceedings Vol. 3945:
Laser Diodes and LEDs in Industrial, Measurement, Imaging, and Sensors Applications II; Testing, Packaging, and Reliability of Semiconductor Lasers V
Geoffrey T. Burnham; S. C. Wang; Geoffrey T. Burnham; Xiaoguang He; Kurt J. Linden; S. C. Wang, Editor(s)

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