Beam shaping of high power diode laser stack into homogeneous line

doi:10.1007/s12200-014-0382-x

Front Optoelec

2014, Vol. 7

Issue (1) : 102-106 https://doi.org/10.1007/s12200-014-0382-x

RESEARCH ARTICLE

Beam shaping of high power diode laser stack into homogeneous line

Mokhtar SLIMANI¹, Jun LIU¹, Jianguo XIN¹(

), Jiabin CHEN²

1. School of Optoelectronics, Beijing Institute of Technology, Beijing 100081, China; 2. School of Automation, Beijing Institute of Technology, Beijing 100081, China

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Abstract

In this paper, analysis of beam shaping and homogenization of high power diode laser stack into a line focus with dimension of 10 mm × 0.5 mm was reported. The beam shaping and homogenization was simulated by using ZemaX-ray tracing technique. The results have shown that intensity distribution after beam shaping and homogenization at the work piece is a flat top for the slow axis with homogeneity over 95% and a Gaussian distribution for the fast axis.

Keywords beam shaping homogenization high power diode laser stack homogeneity pumping applications

Corresponding Author(s): XIN Jianguo,Email:xinjgbit@163.com

Issue Date: 05 March 2014

Cite this article:

Mokhtar SLIMANI,Jun LIU,Jianguo XIN, et al. Beam shaping of high power diode laser stack into homogeneous line[J]. Front Optoelec, 2014, 7(1): 102-106.

URL:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-014-0382-x
https://academic.hep.com.cn/foe/EN/Y2014/V7/I1/102

Fig.1 Optical setup. (a) Homogenization principle of waveguide; (b) fast axis ray tracing

Fig.2 Diode laser stack beam profile. (a) and (b) Beam profile before focusing; (c) and (d) beam profile after focusing onto waveguide’s entrance,It can be seen in Figs. 2(a) and 2(b) that the output beam intensity distribution of the diode laser stack is not uniform along slow axis direction; and the uniformity of the beam intensity distribution cannot be improved by simply optical focusing as shown in Figs. 2(c) and 2(d).

Fig.3 (a) Spot size at work piece; (b) three dimensional diagram of spot size

Fig.4 (a) Intensity distribution of the line focus along the slow axis direction; (b) Intensity distribution along fast axis direction.

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[1]	Yuchen SONG, Yunfeng CHEN, Jianguo XIN, Teng SUN. Two-dimensional beam shaping and homogenization of high power laser diode stack with rectangular waveguide[J]. Front. Optoelectron., 2019, 12(3): 311-316.

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