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Simple technique to achieve fast light in gain regime using Brillouin scattering

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Figure

Fig.  1. Principle of the single-pumped passive configuration to generate a SBS gain or loss  doublet
Figure 2 depicts the schematic diagram of the experimental set-up. We appended two  segments of different single mode optical fibers with similar length (approximately 2km) as  the SBS gain medium
Fig. 3. The spectral profiles of gain-doublets as a function of frequency for different spectral  widths of the pump
Fig. 5. Time advancements for a 1 MHz sine modulated signal as a function of the pump  power in the optimum delay-bandwidth conditions (resonance separation: 120 MHz,  effective resonance width 40 MHz)
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