Cylindrical zoom optics for high-power diode lasers

Bodo Ehlers; Urban Walz; Stefan Heinemann

doi:10.1117/12.382763

14 April 2000 Cylindrical zoom optics for high-power diode lasers

Bodo Ehlers, Urban Walz, Stefan Heinemann

Proceedings Volume 3929, Solid State Lasers IX; (2000) https://doi.org/10.1117/12.382763
Event: Symposium on High-Power Lasers and Applications, 2000, San Jose, CA, United States

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.

Citation Download Citation

Bodo Ehlers, Urban Walz, and Stefan Heinemann "Cylindrical zoom optics for high-power diode lasers", Proc. SPIE 3929, Solid State Lasers IX, (14 April 2000); https://doi.org/10.1117/12.382763

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