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Appl. Sci. 2015, 5(4), 1970-1979; doi:10.3390/app5041970

Generation of 25-TW Femtosecond Laser Pulses at 515 nm with Extremely High Temporal Contrast

1
Helmholtz Institute Jena, Fröbelstieg 3, 07743 Jena, Germany
2
Institute of Optics and Quantum Electronics, Friedrich-Schiller-University Jena, Max-Wien Platz 1, 07743 Jena, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Totaro Imasaka
Received: 7 September 2015 / Revised: 4 December 2015 / Accepted: 14 December 2015 / Published: 19 December 2015
(This article belongs to the Special Issue Diode-Pumped, Ultra-Short Pulse Lasers)
View Full-Text   |   Download PDF [4690 KB, uploaded 19 December 2015]   |  

Abstract

We report on the frequency doubling of femtosecond laser pulses at 1030 nm center wavelength generated from the fully diode-pumped laser system POLARIS. The newly generated pulses at a center wavelength of 515 nm have a pulse energy of 3 J with a pulse duration of 120 fs. On the basis of initially ultra-high contrast seed pulses we expect a temporal intensity contrast better 10 17 200 ps before the peak of the main pulse. We analyzed the temporal intensity contrast from milliseconds to femtoseconds with a dynamic range covering more than 20 orders of magnitude. The pulses were focussed with a f/2-focussing parabola resulting in a peak intensity exceeding 10 20 W / cm 2 . The peak power and intensity are to the best of our knowledge the highest values for 515 nm-laser-pulses achieved so far. View Full-Text
Keywords: second harmonic generation; diode pumped lasers; frequency conversion; high-power lasers; high-intensity lasers; femtosecond lasers second harmonic generation; diode pumped lasers; frequency conversion; high-power lasers; high-intensity lasers; femtosecond lasers
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Hornung, M.; Becker, G.A.; Seidel, A.; Reislöhner, J.; Liebetrau, H.; Bock, L.; Keppler, S.; Kessler, A.; Zepf, M.; Hein, J.; Kaluza, M.C. Generation of 25-TW Femtosecond Laser Pulses at 515 nm with Extremely High Temporal Contrast. Appl. Sci. 2015, 5, 1970-1979.

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