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

Yunhui Zhu, Myungjun Lee, Mark A. Neifeld, Daniel J. Gauthier

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


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 noisemodulation 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. In comparison with a previous slow-modulation method, eyediagram and signal-to-noise ratio (SNR) analysis show that this 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 in the comparison.

Original languageEnglish (US)
Pages (from-to)687-697
Number of pages11
JournalOptics Express
Issue number2
StatePublished - Jan 17 2011

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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