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Proceedings Paper

Beam quality optimization of electrically pumped VECSELs for passive modelocking
Author(s): W. P. Pallmann; M. Hoffmann; M. Miller; J. Baier; H. Moench; I. Dahhan; B. Witzigmann; M. Golling; Y. Barbarin; T. Südmeyer; U. Keller
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Paper Abstract

Fundamental mode operation along with high output power is a major challenge for an electrically pumped VECSEL (EP-VECSEL) suitable for passive modelocking. We present an experimental study on the influence of the intermediate DBR reflectivity on the beam quality and the output power of EP-VECSELs. For designs with reflectivities of 90%, 82% and 71% the highest possible power for the best achievable beam quality was 15.1 mW (M2 = 1.1, 82% device). We can demonstrate that a correctly chosen intermediate DBR reflectivity is necessary for both good beam quality and high power, and that a trade-off in power has to be accepted.

Paper Details

Date Published: 21 February 2011
PDF: 4 pages
Proc. SPIE 7919, Vertical External Cavity Surface Emitting Lasers (VECSELs), 79190I (21 February 2011); doi: 10.1117/12.873823
Show Author Affiliations
W. P. Pallmann, ETH Zurich (Switzerland)
M. Hoffmann, ETH Zurich (Switzerland)
M. Miller, Philips Technologie GmbH U-L-M Photonics (Germany)
J. Baier, Philips Research Labs. (Germany)
H. Moench, Philips Research Labs. (Germany)
I. Dahhan, Univ. Kassel (Germany)
B. Witzigmann, Univ. Kassel (Germany)
M. Golling, ETH Zurich (Switzerland)
Y. Barbarin, ETH Zurich (Switzerland)
T. Südmeyer, ETH Zurich (Switzerland)
U. Keller, ETH Zurich (Switzerland)

Published in SPIE Proceedings Vol. 7919:
Vertical External Cavity Surface Emitting Lasers (VECSELs)
Ursula Keller, Editor(s)

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