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Proceedings Paper

High-average power femtosecond VECSELs with tunable repetition rates up to 10 GHz
Author(s): O. D. Sieber; V. J. Wittwer; M. Hoffmann; I. L. Krestnikov; S. S. Mikhrin; D. A. Livshits; M. Golling; T. Südmeyer; U. Keller
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Paper Abstract

We present high average power femtosecond VECSELs based on both quantum dot (QD) and quantum well (QW) gain with extremely low dispersion. 1.05 W in 784-fs pulses could be achieved from a QD-VECSEL modelocked by a QDSESAM with fast recovery dynamics. A similar QW-gain structure modelocked by the same SESAM enabled stable 480-fs with an average output power of 300 mW at a repetition rate of 7 GHz. Furthermore, we investigated repetition rate scaling by changing the cavity length. We demonstrated fundamentally modelocked pulses over a tuning range from 6.5 GHz to 11.3 GHz. Without any realignment of the cavity over the whole tuning range, the pulse duration remained nearly constant around 625 fs (±3.5%) while the output power was 169 mW (±6%). The center wavelength changed only about ±0.2 nm around 963.8 nm. A tunable repetition rate can be of interest for various metrology application such as optical sampling by laser cavity tuning.

Paper Details

Date Published: 14 February 2012
PDF: 7 pages
Proc. SPIE 8242, Vertical External Cavity Surface Emitting Lasers (VECSELs) II, 824210 (14 February 2012); doi: 10.1117/12.907002
Show Author Affiliations
O. D. Sieber, ETH Zurich (Switzerland)
V. J. Wittwer, ETH Zurich (Switzerland)
M. Hoffmann, ETH Zurich (Switzerland)
I. L. Krestnikov, Innoume GmbH (Germany)
S. S. Mikhrin, Innolume GmbH (Germany)
D. A. Livshits, Innolume GmbH (Germany)
M. Golling, ETH Zurich (Switzerland)
T. Südmeyer, ETH Zurich (Switzerland)
U. Keller, ETH Zurich (Switzerland)

Published in SPIE Proceedings Vol. 8242:
Vertical External Cavity Surface Emitting Lasers (VECSELs) II
Anne C. Tropper, Editor(s)

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