Open AccessOptimization of beam transformation system for laser-diode bars
Author(s) -
Jian Yu,
Guo Linhui,
H. Wu,
Zhao Wang,
Songxin Gao,
Deyong Wu
Publication year - 2016
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.24.019728
Subject(s) - laser beam quality , optics , m squared , beam parameter product , beam (structure) , materials science , beam expander , laser , diode , numerical aperture , beam diameter , laser diode , aperture (computer memory) , optoelectronics , laser beams , physics , wavelength , acoustics
An optimized beam transformation system (BTS) is proposed to improve the beam quality of laser-diode bars. Through this optimized design, the deterioration of beam quality after the BTS can be significantly reduced. Both the simulation and experimental results demonstrate that the optimized system enables the beam quality of a mini-bar (9 emitters) approximately equal to 5.0 mm × 3.6 mrad in the fast-axis and slow-axis. After beam shaping by the optimized BTS, the laser-diode beam can be coupled into a 100 μm core, 0.15 numerical aperture (NA) fiber with an output power of over 100 W and an electric-optical efficiency of 46.8%.