title: Conical emission by four-photon parametric generation by using femtosecond laser pulses.
abstract: Conical continuum Stokes and anti-Stokes emissions are observed when intense 100-fs/620-nm ultrafast laser pulses propagate through an ethylene glycol medium. The angle of the anti-Stokes conical emission is modeled by class-II Raman and four-photon parametric generations in a small-scale filament with a nonlinear index change.
authors.forename: Q
authors.initials: Q
authors.lastname: Xing
authors.forename: K M
authors.initials: KM
authors.lastname: Yoo
authors.forename: R R
authors.initials: RR
authors.lastname: Alfano