High-fidelity, broadband stimulated-Brillouin-scattering-based slow light using fast noise modulation

Details High-fidelity, broadband stimulated-Brillouin-scattering-based slow light using fast noise modulation High-fidelity, broadband stimulated-Brillouin-scattering-based slow light using fast noise modulation

2010-10-18

arxiv.org/abs/1010.3710v1

Physics

Optics

Scientific paper

We demonstrate a 5-GHz-broadband tunable slow-light device based on stimulated Brillouin scattering in a standard highly-nonlinear optical fiber pumped by a noise-current-modulated laser beam. The noise modulation waveform uses an optimized pseudo-random distribution of the laser drive voltage to obtain an optimal flat-topped gain profile, which minimizes the pulse distortion and maximizes pulse delay for a given pump power. Eye-diagram and signal-to-noise ratio (SNR) analysis show that this new broadband slow-light technique significantly increases the fidelity of a delayed data sequence, while maintaining the delay performance. A fractional delay of 0.81 with a SNR of 5.2 is achieved at the pump power of 350 mW using a 2-km-long highly nonlinear fiber with the fast noise-modulation method, demonstrating a 50% increase in eye-opening and a 36% increase in SNR compared to a previous slow-modulation method.

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