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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.
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- 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)
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301, 1702-1704
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- Photonic Crystal Fibers.
- P. Russell (2003)
Science
299, 358-362
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