Share Email Print

Proceedings Paper

Cylindrical zoom optics for high-power diode lasers
Author(s): Bodo Ehlers; Urban Walz; Stefan Heinemann
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Today's high power diode lasers achieve spots with dimensions of approximately 1 mm square, delivering intensities breaching 105 W/cm2 and power levels of up to 4 kW. These lasers can be used for a variety of applications from surface treatment to welding. However, each of these applications require different focus sizes to maximize the benefits of the laser source. Therefore, variable cylindrical optics were designed and manufactured in the scope of this work. They create rectangular spot sizes with adjustable aspect ratios. These optics are used in connection with high power diode laser stacks operating in the multiple kilowatt power range. Two different variable optics were used. The first is designed for surface applications such as hardening, cladding and alloying. The spot size varies from 6.0 mm to 22.0 mm in one direction and stays constant at 2.6 mm in the other direction. The second optic exhibits two ranges of continuously variable spot sizes from 1.2 mm to 6.0 mm and 2.4 mm to 12.0 mm with its second dimension fixed at 1.2 mm or 2.4 mm respectively. This lens is used for applications from surface treatment to welding and cutting.

Paper Details

Date Published: 14 April 2000
PDF: 8 pages
Proc. SPIE 3929, Solid State Lasers IX, (14 April 2000); doi: 10.1117/12.382763
Show Author Affiliations
Bodo Ehlers, Fraunhofer Ctr. for Laser Technology (United States)
Urban Walz, Fraunhofer Ctr. for Laser Technology (United States)
Stefan Heinemann, Fraunhofer Ctr. for Laser Technology (United States)

Published in SPIE Proceedings Vol. 3929:
Solid State Lasers IX
Richard Scheps, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?