Open AccessAstigmatism-free high-brightness 1060 nm edge-emitting lasers with narrow circular beam profile
Author(s) -
Md. Jarez Miah,
V. P. Kalosha,
D. Bimberg,
J. Pohl,
Markus Weyers
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.24.030514
Subject(s) - optics , laser , materials science , beam divergence , laser beam quality , m squared , brightness , multi mode optical fiber , semiconductor laser theory , wavelength , beam (structure) , optoelectronics , optical fiber , physics , laser beams
1060 nm high-brightness vertical broad-area edge-emitting lasers providing anastigmatic high optical power into a narrow circular beam profile are demonstrated. Ridge-waveguide (RW) lasers yield record 2.2 W single-transverse mode power in the 1060-nm wavelength range under continuous-wave (cw) operation at room temperature with excellent beam quality factor M 2 ≤ 2. Independent of operating current the astigmatism is only 2.5 µm. 3 mm long broad-area (BA) lasers produce a θ vert as narrow as 9° full width at half maximum, which agrees well with our simulation results, being insensitive to drive current. 5 mm long BA lasers deliver highest ever reported cw 12 W multimode output power among lasers showing θ vert <10° in the 1060-nm wavelength range. The emitted laser beams from both RW and BA lasers show a perfect circular shape with ≤10° divergence angle at record 2.1 W and 4.2 W cw-mode output power, respectively.