High Beam Quality and High Power Diode Laser Source

Abstract:

As the increasing applications of laser diodes in laser cladding and laser hardening, the single laser diode 0ptical power can not meet the actual requirements. An improvement of the power and Power densty necessary and it can be achieved by beam shaping and beam combination such as polarization coupling the polarization coupling technology is used to couple two laser beams with thin film plate polarizer In this paper two 880 nm vertical stacked arrays with an output power of l600 W was achieved After fast axils and slow axis collimated, the polarization direction of one stacked arrays is rotated 90 degree through a half wave plate, thus, the polarization directions of two laser stack are vertica1. The beams of two lasers are incident on the p1ate po1arizer, one transmits through it, and the other is reflected on it. Finally, two beams combine to one. Polarization coupling of two bars increases the power by a factor of 1.6, and the output power is 2500 W, electro optical conversion efficiency is more than 48%. The spot size is about2 mm x 2 mm. This laser can be directly applied to cladding, surface hardening and other fields.

• Periodical: Advanced Materials Research (Volumes 712-715)
• Pages: 1802-1806
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.712-715.1802
• Online since: June 2013
• Authors: Yuan Yuan Gu, Guo Xing Wu, Hui Lu, Yan Cui
• Keywords: Diode Laser, High Beam Quality, High Power, Polarization Beam Coupling

References

[1] Gapontsev V, Moshegov N., Trubenko P., Komissarov A., Berishev I., in: High-Brightness 9XX-nm Pumps with Wavelength Stabilization, Proc. SPIE 7583 (2010)

DOI: 10.1117/12.905982

[2] Niu J., Xu J. in: Coupling efficiency of laser beam to multimode fiber, Opt. Commun. 274, 315-319 (2007).

DOI: 10.1016/j.optcom.2007.02.027

[3] Qiu X., Dai Y., Au M., Guo J., Wonga V., Rossin V., Venables D., Skidmore J., Zucker E., in: A High Power, High-Brightness Multi-Single-Emitter Laser Pump Platform, Proc. SPIE 7198 (2009).

DOI: 10.1117/12.809671

[4] Forrer M. et al., "Micro Optic Cylindrical Aspherical Fast Axis Collimator for High Power Diode Laser", Ch. 11.2 in Hentschel R., Braunecker B. and Tiziani H.J. (eds.) in "Advanced Optics Using Aspherical Elements", SPIE PRESS Ltd., California 2007.

DOI: 10.1117/3.741689.bm

[5] Kura D. et al., "Fast Axis Collimation for High Power Diode Lasers", Marsh J., Bryce C. (eds.) in "Proceedings of the 2009 Conference on High Power Diode Lasers and Systems", PHOTONEX, IEEE, UK 2009.

DOI: 10.1109/hpd.2009.5365666

[6] Forrer M. et al., "Micro optic solutions for beam shaping of individually addressable high-power single-mode diode laser arrays", LASE 2010, Proc. SPIE 7583, California 2010.

DOI: 10.1117/12.842320