Beam Shaping Technology for High Power Diode Laser Source

Abstract:

Direct diode lasers have some of the most attractive features of any laser. They are very efficient, compact, wavelength versatile, low cost, and highly reliable. However, the full utilization of direct diode lasers has yet to be realized. This is mainly due their poor output beam quality. Because of this, direct diode lasers are typically used to pump other lasers such as bulk solid-state (rod and thin disk) and fiber lasers. An improvement of the wall-plug efficiency and Power density necessary can be achieved by beam shaping and beam combination such as polarization coupling. In this paper, using the beam shaping technology realize good beam quality and high wall-plug efficiency. Base on bars rated to 60 W and 57% conversion efficiency, vertically stacked arrays (twenty bars) of such configuration are demonstrated with rated to about 1200W. The beam quality of high-power high brightness 880 nm laser diode source is improved with beam shaping. Beam parameter product of 79. 3 mm mrad ×81. 2 mm mrad, electro-optical conversion efficiency of more than 45.8% and continuous output power of 1 kW are demonstrated. This laser can be directly applied to cladding, surface hardening and other fields.

• Periodical: Advanced Materials Research (Volumes 915-916)
• Pages: 385-389
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.915-916.385
• Online since: April 2014
• Authors: Yuan Yuan Gu*, Guo Xing Wu, Hui Lu, Jian Lin
• Keywords: Diode Laser, Incoherent Beam Coupling, Laser Technique, Wavelength Coupling

References

[1] Friedheim Dorsch, Franz X. Daiminger, Petra Hennig, Veit Blüme, 2 kW cw Fiber-coupled Diode Laser System, Proc. SPIE 3889, 45-53(2000).

DOI: 10.1117/12.380893

[2] Friedrich Bachmann, Goals and status of the German national research initiative BRIOLAS (brilliant diode lasers) , Proc. SPIE 6456(2007).

DOI: 10.1117/12.700146

[3] C. Martin Stickley, Mark E. Filipkowski, Enrique Parra, Edwin E. Hach III, Future of high efficiency diode lasers, , Proc. SPIE 5991(2005).

[4] www. laserline. de.

[5] Friedrich Bachmann: Present technology, industrial applications and future prospects of high power diode lasers, SPIE, Vol. 4762, 3-15( 2002).

[6] Christoph Ullman, Bad Honnef, Volker Krause, Hohr-Grenzhausen, Optical arrangement for the use during a laser diode arrangement as well as laser diode arrangement with such an optical arrangement, United States Patent, US6771686B1.

[7] ISO/ DIS- Standard 11146, International Organization f or Standardization.