Two-dimensional beam shaping and homogenization of high power laser diode stack with rectangular waveguide

doi:10.1007/s12200-018-0831-z

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

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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 Author(s): 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:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-018-0831-z
https://academic.hep.com.cn/foe/EN/Y2019/V12/I3/311

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

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[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.

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