Zero-broadening and pulse compression slow light in an optical fiber at high pulse delays.
We show in theory and experiment that in a SBS based delay line pulses can be delayed to more than a bit period without broadening. Zero-broadening is possible since the broadening due to the narrow Brillouin gain bandwidth can be compensated by the group velocity dispersion accompanied with the pulse delay. We achieve compensation by a superposition of a broad gain with two narrow losses at its wings. In our experiments 1.9ns pulses were delayed to around 1.5Bit, at the same time its FWHM width was compressed to 80%. Therefore, besides slowing down pulses, the method could have the potential to compensate the fiber dispersion.
Schneider
Thomas
T
Deutsche Telekom AG, University of Applied Sciences, Gustav-Freytag Str. 43-45, D-04277 Leipzig, Germany. schneider@hft-leipzig.de
Wiatrek
Andrzeij
A
Henker
Ronny
R