  The versatility of optical parametric amplifiers make them excellent sources
for next-generation ultrashort strong-field physics experiments, however phase
matching considerations limit the available bandwidth. We demonstrate
supercontinuum amplification in a four-wave optical parametric amplifier by
Kerr instability. Experimentally, we amplify spectra that span nearly an octave
without spatial chirp, with two-cycle transform limited pulse duration. We also
theoretically explore regimes that demonstrate single-cycle amplification in
the near infrared.
