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Series in Quantum Electronics
Henry Baltes, Peter Günter, Ursula Keller,
Fritz K. Kneubühl †, Walter Lukosz,
Hans Melchior, Markus W. Sigrist
Valentin J. Wittwer
New Frontiers of Ultrafast
Semiconductor Disk Lasers High Power
MIXSELs and Low Noise VECSELs.
1st edition 2013. XXVI, 130 pages, € 64,00.
In this work, novel achievements in the field of ultrafast semiconductor disk lasers (SDL) are discussed. Using this highly promising technology, new frontiers and improved results are outlined. First, power scaling to record high average output power levels was achieved by utilizing our novel integrated ultrafast semiconductor disk technology, the mode-locked integrated external cavity surface-emitting laser (MIXSEL). It combines the two key elements of ultrafast SDLs, the vertical external-cavity surface-emitting laser (VECSEL) and the semiconductor saturable absorber mirror (SESAM), in one single structure. This absorber integration is possible, because both elements consist of semiconductor layer stacks of the same material system. The full integration of those mode-locked lasers is a very important step for making this technology accessible to many applications, where other ultrafast lasers are too expensive, complex, bulky, or fragile. In addition, an ultrastable laser prototype was developed and fabricated, in order to investigate low-noise performance of SESAM mode-locked VECSELs. We achieved the lowest timing jitter ever reported for this kind of laser. The investigation of noise properties is very important for the evaluation of the usability of such ultrafast laser sources for applications that are sensitive to fluctuations in power or timing of the emitted pulse train.
About the author:
Valentin J. Wittwer received his diploma degree in physics in 2008 from ETH Zurich, Switzerland. He joined the Ultrafast Laser Physics group in the Institute of Quantum Electronics at ETH Zurich in the same year. His research interests focus on the development of ultrafast semiconductor lasers in particular the integration of the saturable absorber and the construction and characterization of oscillators with low timing-jitter. He has written or co-authored more than 40 scientific journal articles and conference contributions.
Keywords: ultrafast semiconductor disk lasers, High Power MIXSELs, Low Noise VECSELs.
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