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3 March 2014 Femtosecond MIXSEL
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The modelocked integrated external-cavity surface emitting laser (MIXSEL) combines the active region and basic layout of vertical-external-cavity surface-emitting lasers (VECSELs) with the saturable absorber of a semiconductor saturable absorber mirror (SESAM) in a single semiconductor layer stack. This concept allows stable and self-starting passive modelocking in a simple straight cavity. Record-high average output power has been demonstrated previously with a MIXSEL based on a quantum dot saturable absorber, but with a minimum pulse duration of only 17 ps up to now. Here we present a femtosecond MIXSEL emitting 620-fs pulses in 101 mW of average output power at 4.8 GHz pulse repetition rate. A novel single quantum well saturable absorber, whose parameters are discussed in detail, enabled the strong reduction in pulse duration by over an order of magnitude.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. Mangold, V. J. Wittwer, C. A. Zaugg, S. M. Link, M. Golling, B. W. Tilma, and U. Keller "Femtosecond MIXSEL", Proc. SPIE 8966, Vertical External Cavity Surface Emitting Lasers (VECSELs) IV, 896609 (3 March 2014);


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