Please wait a minute...

Frontiers of Optoelectronics

Front. Optoelectron.    2019, Vol. 12 Issue (3) : 311-316     https://doi.org/10.1007/s12200-018-0831-z
RESEARCH ARTICLE
Two-dimensional beam shaping and homogenization of high power laser diode stack with rectangular waveguide
Yuchen SONG, Yunfeng CHEN, Jianguo XIN(), Teng SUN
School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China
Download: PDF(2293 KB)   HTML
Export: BibTeX | EndNote | Reference Manager | ProCite | RefWorks
Abstract

In this paper, the research work of two-dimensional beam shaping and homogenization of high power laser diode (LD) stack by a rectangular waveguide is presented. Both the theoretical simulation and experiment results have shown that the diode stack beam can be shaped into a uniform square spot with a dimension of 10 mm × 10 mm and the non-uniformity less than 5% along both directions of slow axis and fast axis, the shaped beam has a uniform pumping depth over 10 mm, which is well to be used for a rectangular laser medium end pumping.

Keywords beam shaping      high power laser diode (LD) stack      laser end pumping     
Corresponding Authors: Jianguo XIN   
Just Accepted Date: 09 July 2018   Online First Date: 01 August 2018    Issue Date: 16 September 2019
 Cite this article:   
Yuchen SONG,Yunfeng CHEN,Jianguo XIN, et al. Two-dimensional beam shaping and homogenization of high power laser diode stack with rectangular waveguide[J]. Front. Optoelectron., 2019, 12(3): 311-316.
 URL:  
http://journal.hep.com.cn/foe/EN/10.1007/s12200-018-0831-z
http://journal.hep.com.cn/foe/EN/Y2019/V12/I3/311
Service
E-mail this article
E-mail Alert
RSS
Articles by authors
Yuchen SONG
Yunfeng CHEN
Jianguo XIN
Teng SUN
Fig.1  Schematic of the setup of the beam optical shaping system
Fig.2  Ray tracing diagram
Fig.3  LD stack with 10 bars
Fig.4  Simulation results at the target plane. (a) 3D intensity distribution of the shaped beam of the beam cross section; (b) intensity distribution of the shaped beam cross section
Fig.5  Transverse intensity distribution at the front target position of 5 mm from target position. (a) 3D intensity distribution at the front target position of 5 mm from target position; (b) intensity distribution at the front target position 5 mm from target position
Fig.6  Transverse intensity distribution at the rear target position of 5 mm from target position. (a) 3D Intensity distribution at the rear target position of 5 mm from target position; (b) intensity distribution at the rear target position 5 mm from target position
Fig.7  Experiment results without 1D filter
Fig.8  Experiment results with 1D filter obtained at the target plane. (a) 3D transverse intensity distribution of the shaped beam at the target plane; (b) transverse intensity distribution
1 F Bachmann, R Poprawe, P Loosen. High Power Diode Lasers. New York: Springer, 2007, 285–533
2 F M Dickey. Laser Beam Shaping: Theory and Techniques. 2nd ed. New York: CRC Press, 2014, 269–306
3 R E Grojean, D Feldman, J F Roach. Production of flat top beam profiles for high energy lasers. Review of Scientific Instruments, 1980, 51(3): 375–376
https://doi.org/10.1063/1.1136222 pmid: 18647071
4 J M Geary. Channel integrator for laser beam uniformity on target. Optical Engineering (Redondo Beach, Calif.), 1988, 27(11): 972–977
https://doi.org/10.1117/12.7976795
5 J C Ion. Laser Processing of Engineering Materials. Amsterdam: Elsevier, 2005, 117–118
6 K Iwasaki, T Hayashi, T Goto, S Shimizu. Square and uniform laser output device: theory and applications. Applied Optics, 1990, 29(12): 1736–1744
https://doi.org/10.1364/AO.29.001736 pmid: 20563075
7 M Traub, H Hoffmann, H Plum, K Wieching, P Loosen, R Poprawe. Homogenization of high power diode laser beams for pumping and direct applications. In: Proceedings of SPIE 6104, High-Power Diode Laser Technology and Applications IV, 2006, 6104: 61040Q-1–61040Q-10
8 B Köhler, T Brand. 11-kW direct diode laser system with homogenized 55 × 20 mm2 Top-Hat intensity distribution. In: Proceedings of SPIE 6456, High-Power Diode Laser Technology and Applications V, 2007, 6456(11): 64560O-1–64560O-12
9 M Laurenzis, Y Lutz, F Christnacher, A Matwyschuk, J Poyet. Homogeneous and speckle-free laser illumination for range-gated imaging and active polarimetry. Optical Engineering (Redondo Beach, Calif.), 2012, 51(6): 061302
https://doi.org/10.1117/1.OE.51.6.061302
10 Y Lutz, J M Poyet. Laser diode stack beam shaping for efficient and compact long-range laser illuminator design. Optics & Laser Technology, 2014, 57(7): 90–95
https://doi.org/10.1016/j.optlastec.2013.09.015
11 Y Lutz, , Laurenzis M. Beam shaping of laser diode stacks for compact and efficient illumination devices at the French-German Research Institute of Saint-Louis. Advances in Optical Technologies, 2014, 3(2): 179–185
https://doi.org/10.1515/aot-2013-0060
12 M Slimani, J Liu, J Xin, J Chen. Beam shaping of high power diode laser stack into homogeneous line. Frontiers of Optoelectronics, 2014, 7(1): 102–106
https://doi.org/10.1007/s12200-014-0382-x
13 N Coluccelli. Nonsequential modeling of laser diode stacks using Zemax: simulation, optimization, and experimental validation. Applied Optics, 2010, 49(22): 4237–4245
https://doi.org/10.1364/AO.49.004237 pmid: 20676178
Related articles from Frontiers Journals
[1] Mokhtar SLIMANI, Jun LIU, Jianguo XIN, Jiabin CHEN. Beam shaping of high power diode laser stack into homogeneous line[J]. Front Optoelec, 2014, 7(1): 102-106.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed