Astigmatism-free high-brightness 1060 nm edge-emitting lasers with narrow circular beam profile
M.J. Miah1, V.P. Kalosha1, D. Bimberg1,2, J. Pohl3, and M. Weyers3
Published in:
Opt. Express, vol. 24, no. 26, pp. 30514-30522 (2016).
Abstract:
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 M2≤2. Independent of operating current the astigmatism is only 2.5 µm. 3 mm long broad-area (BA) lasers produce a Θvert 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 Θvert<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.
1 Institute of Solid State Physics, Technical University of Berlin, Hardenbergstr. 36, 10623 Berlin, Germany
2 King Abdul-Aziz-University, Jeddah 21589, Saudi Arabia
3 Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, 12489 Berlin, Germany
OCIS codes:
(140.0140) Lasers and laser optics; (140.5960) Semiconductor lasers; (230.0230) Optical devices.
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