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Science 11 October 2002:
Vol. 298. no. 5592, pp. 399 - 402
DOI: 10.1126/science.1076408
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Reports

Stimulated Raman Scattering in Hydrogen-Filled Hollow-Core Photonic Crystal Fiber

F. Benabid,* J. C. Knight, G. Antonopoulos, P. St. J. Russell

We report on stimulated Raman scattering in an approximately 1-meter-long hollow-core photonic crystal fiber filled with hydrogen gas under pressure. Light was guided and confined in the 15-micrometer-diameter hollow core by a two-dimensional photonic bandgap. Using a pulsed laser source (pulse duration, 6 nanoseconds; wavelength, 532 nanometers), the threshold for Stokes (longer wavelength) generation was observed at pulse energies as low as 800 ± 200 nanojoules, followed by a coherent anti-Stokes (shorter wavelength) generation threshold at 3.4 ± 0.7 microjoules. The pump-to-Stokes conversion efficiency was 30 ± 3% at a pulse energy of only 4.5 microjoules. These energies are almost two orders of magnitude lower than any other reported energy, moving gas-based nonlinear optics to previously inaccessible parameter regimes of high intensity and long interaction length.

Optoelectronics Group, Department of Physics, University of Bath, Claverton Down, Bath BA2 7AY, UK.
*   To whom correspondence should be addressed. E-mail: pysab{at}bath.ac.uk

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Generation and Photonic Guidance of Multi-Octave Optical-Frequency Combs.
F. Couny, F. Benabid, P. J. Roberts, P. S. Light, and M. G. Raymer (2007)
Science 318, 1118-1121
   Abstract »    Full Text »    PDF »
Generation of Megawatt Optical Solitons in Hollow-Core Photonic Band-Gap Fibers.
D. G. Ouzounov, F. R. Ahmad, D. Muller, N. Venkataraman, M. T. Gallagher, M. G. Thomas, J. Silcox, K. W. Koch, and A. L. Gaeta (2003)
Science 301, 1702-1704
   Abstract »    Full Text »    PDF »
Photonic Crystal Fibers.
P. Russell (2003)
Science 299, 358-362
   Abstract »    Full Text »    PDF »


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Science. ISSN 0036-8075 (print), 1095-9203 (online)