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A simple method to generate a negative time delay in SBS-based fast-light systems using Brillouin gain and loss is shown. We achieved a maximum negative time delay of 32.4 ns in one long fiber segment.
Lauterback, K. et al. (2007) Investigation of fast light in long optical fibers based on stimulated Brillouin scattering. CLEO 2007: Conference on Lasers and Electro Optics, pp.1-2. Baltimore, 6-11 May, 2007, doi:10.1109/CLEO.2007.4453658