Low distortion Brillouin slow light in optical fibers using AM modulation

Stimulated Brillouin scattering (SBS) has been recently shown to offer a mechanism for generating tunable all-optical delays in roomtemperature
single-mode optical fibers at telecommunication wavelengths. This technique makes use of the rapid variation of the refractive index that occurs in the vicinity of the Brillouin gain resonance. When the slow light pulse delay is subject to a constraint on the allowable pulse distortion, it has been shown that the use of a pair of closely-spaced Brillouin gain lines can
increase the distortion-constrained delay, with respect to the single-line
configuration. In this paper, we numerically and experimentally demonstrate
that the same experimental apparatus usually employed for generating a
Brillouin gain doublet, can also be used for achieving three equally-spaced
Brillouin gain resonances, further increasing the distortion-constrained pulse delay.