anomalous dispersion primary reference

[John Denker <jsd@MONMOUTH.COM>]

You can get a first-hand account of the gain-assisted anomalous dispersion
work at
  http://www.neci.nj.nec.com/homepages/lwan/gas.htm
including a few powerpoint slides
  http://www.neci.nj.nec.com/homepages/lwan/demo.htm
and a few FAQs
  http://www.neci.nj.nec.com/homepages/lwan/faq.htm
and even a Quicktime movie
  http://www.neci.nj.nec.com/homepages/lwan/gasmov.htm

Note that FAQ #3 expressly disclaims being able to send signals faster than
the speed of light.