RT info:eu-repo/semantics/conferenceObject T1 Light controlling light in an optical fibre: From very slow to faster-than-light speed A1 Thévenaz, Luc A1 Song, K.-Y. A1 Chin, S.H. A1 González Herráez, Miguel K1 Fiber optics K1 Nonlinear optics K1 Slow & fast light K1 Stimulated Brillouin scattering K1 Ciencias tecnológicas K1 Electrónica K1 Technology K1 Electronics AB 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. Advanced schemes can be realized thanks to the extremely flexible possibility to shape the gain spectrum to make it optimized for applications. Ultra wide bandwidth, delaying with flat amplitude response and lower distortion were successfully demonstrated this wa PB IEEE SN 978-14244-0830-6 YR 2008 FD 2008-02-08 LK http://hdl.handle.net/10017/27445 UL http://hdl.handle.net/10017/27445 LA eng NO Swiss National Foundation DS MINDS@UW RD 20-abr-2024