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Stimulated Raman scattering in hydrogen-filled hollow-core photonic crystal fiber. (Reports)
- Source :
- Science. October 11, 2002, Vol. 298 Issue 5592, p399, 4 p.
- Publication Year :
- 2002
-
Abstract
- 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.<br />A long-standing challenge in nonlinear optics is the maximization of nonlinear interactions between laser light and low-density media such as gases. The requirements for efficient nonlinear processes are high intensity [...]
- Subjects :
- Nonlinear optics -- Research
Science and technology
Research
Subjects
Details
- Language :
- English
- ISSN :
- 00368075
- Volume :
- 298
- Issue :
- 5592
- Database :
- Gale General OneFile
- Journal :
- Science
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.93349513