Open AccessBeam waist shrinkage of high-power broad-area diode lasers by mode tailoring
Author(s) -
Jiaxin Su,
Cunzhu Tong,
Lijie Wang,
Yanjing Wang,
Hongliang Lü,
Zhide Zhao,
Jun Wang,
Shaoyang Tan,
Shili Shu
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.390265
Subject(s) - materials science , laser beam quality , optics , diode , laser , beam (structure) , optoelectronics , shrinkage , semiconductor laser theory , laser diode , laser beams , physics , composite material
A new approach was proposed and its role in improvement of the beam quality of high-power broad-area diode lasers was demonstrated, in which a composite arrow array and trench microstructure was used to suppress the beam waist and tailor the high order lateral modes. The beam waist shows a special shrinkage with increasing injection current resulting from the combined effect of mode tailoring and the thermal lens effect. A 58% improvement in lateral beam parameter product was realized compared with conventional broad-area diode lasers.