INSTITUTE OF APPLIED PHYSICS - "student presentation award" to Martin Gebhardt in Japan

"student presentation award" to Martin Gebhardt in Japan

Presentation on “Pulse refinement of a high-performance fiber laser system” is awarded as the best presentation at the OSA-Laser Congress in Japan

Ultra-short laser pulses with a duration of few optical cycles and a central wavelength of 2 μm are interesting for numerous demanding applications. They allow, for example, the so-called wavelength range of the molecular fingerprints (4-20 μm) to be addressed in non-linear crystals via a simple one-step frequency conversion. This spectral range plays an extremely important role for applications in environmental technology, cancer diagnostics and the detection of explosives or chemical agents. To improve the existing technology significantly or to enable new measuring methods with higher sensitivity and shorter measuring times, more powerful laser sources are necessary.
Based on the newly developed thulium-based ultra-shortpulse fiber lasers developed in the research group "Fiber & Waveguidelaser" of our institute, the scientists have been able to realize laser pulses with only 2 optical cycles by 2 μm in wavelength with unprecedented average power. For this purpose, the pulse spectrum is broadened by propagation within a gas-filled hollow core fiber, and the laser pulse is shortened simultaneously in time due to the special dispersive properties of the fiber. This concept is highly efficient like the fiber laser concept. Therefore, the combination of thulium-based fiber lasers with the so-called non-linear compression applied here is very well suited for the realization of intense laser pulses of 2 μm wavelength with few optical cycles and at a high average power. In the specific compression experiment, pulse compression at 13 fs (two optical cycles) pulse duration at 43 W average power was achieved.
These results and the physical background of the overall concept outlined here were recently presented at the "Advanced Solid State Lasers" conference in Nagoya, Japan (2-5 October 2017). As part of the "student presentation awards", Martin Gebhardt presented this work and has been renowned as a best presentation of the conference by a specialist jury.
Congratulations to Martin Gebhardt and the co-authors: C. Gaida,1 T. Heuermann,1,2 F. Stutzki,1 C. Jauregui,1 J. Antonio-Lopez,3 A. Schulzgen,3 R. Amezcua-Correa,3 J. Limpert,1,2,4 and A. Tünnermann1,2,4

1 Institute of Applied Physics (IAP)
2 Helmholtz Institute Jena (HIJ)
3 CREOL, College of Optics and Photonics, University of Central Florida
4 Fraunhofer Institute for Applied Optics and Precision Engineering (IOF)

Martin Gebhardt at laboratory
Martin Gebhardt at the his work in the laboratory of the IAP. [Kasper, FSU Jena]

News from: 24.10.2017 11:48
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