Luz lenta y luz rápida en fibras ópticas
- Thévenaz, L. /Y Song, K.- /Gonzalez-Herraez. M.
- K. Y. Song
- Miguel González Herráez
ISSN: 2171-8814
Year of publication: 2006
Issue Title: 10 Años del Inst.Física aplicada - CSIC
Volume: 39
Issue: 2
Pages: 139-144
Type: Article
More publications in: Óptica pura y aplicada
Abstract
We demonstrate a method to achieve an extremely wide and flexible external control of the group velocity of signals as they propagate along an optical fibre. This control is achieved by means of the gain and loss mechanisms of stimulated Brillouin scattering in the fibre itself. Our experiments show that group velocities below 71,000 km/s on one hand, well exceeding the speed of light in vacuum on the other hand and even negative group velocities can readily be obtained with a simple benchtop experimental setup. The experimental result shows tuneable optical delay as much as 152 ns with a 40 ns pulse..