Dense spatial multiplexing enables high brightness multi-kW diode laser systems

Holger Schlüter; Christoph Tillkorn; Ulrich Bonna; Greg Charache; John Hostetler; Ting Li; Carl Miester; Robert Roff; Thilo Vethake; Claus Schnitzler

doi:10.1117/12.657267

15 February 2006 Dense spatial multiplexing enables high brightness multi-kW diode laser systems

Holger Schlüter, Christoph Tillkorn, Ulrich Bonna, Greg Charache, John Hostetler, Ting Li, Carl Miester, Robert Roff, Thilo Vethake, Claus Schnitzler

Author Affiliations +

Proceedings Volume 6104, High-Power Diode Laser Technology and Applications IV; 61040M (2006) https://doi.org/10.1117/12.657267
Event: Lasers and Applications in Science and Engineering, 2006, San Jose, California, United States

Abstract

The materials processing industry has recently mandated the need for more efficient laser systems with higher beam quality and longer life. Current multiplexing techniques, state-of-the-art laser diodes and novel cooling designs are now emerging as possibilities to meet the ever demanding industry needs. This paper describes the design and initial results of a direct diode system that is aimed at delivering 1.5 kW of output power and a beam divergence of 40 mm mrad on a long life macro-channel cooler. The design entails multiplexing 2 wavelength combined beams and 2 polarization combined beams. Each of the four branches of the direct diode system utilizes a novel stacking and cooling design. The results from one of these branches, 1 wavelength and 1 polarization, are presented where the light is coupled into a fiber with a 400 μm core diameter and a NA of 0.22. Each branch consists of 60 diode laser mini-arrays, where each mini-array consists of four 100 μm wide emitters and a lateral fill factor of 50%. An output power of 500W at 10°C water temperature and 420 W at 25°C are demonstrated through the 400 μm fiber.

Citation Download Citation

Holger Schlüter, Christoph Tillkorn, Ulrich Bonna, Greg Charache, John Hostetler, Ting Li, Carl Miester, Robert Roff, Thilo Vethake, and Claus Schnitzler "Dense spatial multiplexing enables high brightness multi-kW diode laser systems", Proc. SPIE 6104, High-Power Diode Laser Technology and Applications IV, 61040M (15 February 2006); https://doi.org/10.1117/12.657267

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available