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Optically controlled slow and fast light in optical fibers using stimulated Brillouin scattering

Gonzalez-Herraez, Miguel  
•
Song, Kwang-Yong
•
Thévenaz, Luc  
2005
Applied Physics Letters

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 fiber. This control is achieved by means of the gain and loss mechanisms of stimulated Brillouin scattering in the fiber itself. Our experiments show that group velocities below 71 000 kms 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. We believe that the fact that slow and fast light can be achieved in a standard single-mode fiber, in normal environmental conditions and using off-the-shelf instrumentation, is very promising for a future use in real applications. © 2005 American Institute of Physics.

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