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.
Michael D. Stenner, Mark A. Neifeld, Zhaoming Zhu, Andrew M.C. Dawes, and Daniel J. Gauthier, "Distortion management in slow-light pulse delay," Opt. Express 13, 9995-10002 (2005) http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-13-25-9995