Abstract
We describe a methodology to maximize slow-light pulse delay subject to a constraint on the allowable pulse distortion. We show that optimizing over a larger number of physical variables can increase the distortion-constrained delay. We demonstrate these concepts by comparing the optimum slow-light pulse delay achievable using a single Lorentzian gain line with that achievable using a pair of closely-spaced gain lines. We predict that distortion management using a gain doublet can provide approximately a factor of 2 increase in slow-light pulse delay as compared with the optimum single-line delay. Experimental results employing Brillouin gain in optical fiber confirm our theoretical predictions.
Highlights
The primary requirements for slow-light pulse delay are that the temporal pulse delay td be large relative to the pulse width τ and that the pulse not be substantially distorted. These two requirements largely oppose each other, with large delay coming at the cost of greater distortion. These tradeoffs have been studied in simple Lorentzian systems [6,7,8] and in Dopplerbroadened media [9] with encouraging results, but distortion remains a major limitation to the usefulness of slow-light pulse delay
We present a simple distortionmanaged medium based on dual Lorentzian gain lines
We demonstrate dispersion-managed pulse delay in an experiment where the slow-light effect arises from the dispersion associated with stimulated Brillouin scattering (SBS) resonances in a pumped optical fiber [10,11,12,13]
Summary
L. Gaeta, “Tunable all-optical delays via Brillouin slow light in an optical fiber,” Phys. These tradeoffs have been studied in simple Lorentzian systems [6,7,8] and in Dopplerbroadened media [9] with encouraging results, but distortion remains a major limitation to the usefulness of slow-light pulse delay.
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