We report the fabrication of a highly nonlinear holey fiber made from pure
silica with an effective area of just similar to2.8 mum(2) at 1550 run. We
believe this to be the smallest effective area yet measured for a holey fib
er at 1550 nm. We also report the operation of a 2R regenerative optical sw
itch based on just 3.3 m of the fiber that is shown to have 30 times the no
nlinear figure of merit of previous devices based on dispersion-shifted fib
er. (C) 2001 Optical Society of America.