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Proceedings Paper

Nanosecond supercontinuum generation at the mJ level
Author(s): Scott C. Buchter; Bo Andersen; Martin D. Nielsen; Kim P. Hansen; Harald Simonsen
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Paper Abstract

Light sources with a broad spectral output and diffraction limited beam quality have a wide variety of present and future applications. A few of particular interest are hyperspectral laser radar for environmental monitoring, active hyperspectral imaging for detection and identification of objects, and speckle-free illumination. With the exception of systems based on amplified femto- or picosecond lasers, which are large and extremely complicated, pulse energies from supercontinuum laser sources have been limited to <10 microJoules which is generally not sufficient for the applications listed above. We present a simple technique to generate broadband light spanning several hundred nanometers in the near infrared with pulse energies of ~1 mJ, an improvement of approximately two orders of magnitude. The system is comprised of a Q-switched Nd:YAG laser and a very large mode area photonic crystal fiber. A combination of cascaded stimulated Raman scattering, four wave mixing, and self-phase modulation is responsible for the spectral broadening. Possibilities of scaling the output to the ~10 mJ level as well as extending the spectral coverage to the visible and mid-infrared will also be discussed.

Paper Details

Date Published: 23 December 2004
PDF: 6 pages
Proc. SPIE 5620, Solid State Laser Technologies and Femtosecond Phenomena, (23 December 2004); doi: 10.1117/12.582591
Show Author Affiliations
Scott C. Buchter, Helsinki Univ. of Technology (Finland)
Bo Andersen, Koheras A/S (Denmark)
Martin D. Nielsen, Crystal Fibre A/S (Denmark)
Kim P. Hansen, Crystal Fibre A/S (Denmark)
Harald Simonsen, Crystal Fibre A/S (Denmark)

Published in SPIE Proceedings Vol. 5620:
Solid State Laser Technologies and Femtosecond Phenomena
Jonathan A. C. Terry; W. Andrew Clarkson, Editor(s)

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