title: Highly efficient phase-conjugation of a 1 microm pico-second Laguerre-Gaussian beam.
abstract: We have demonstrated highly efficient Laguerre Gaussian beam generation by using a ring self-pumped phase conjugate mirror in the pico-second regime for the first time. The phase conjugate reflectivity was typically ~55%. We have also investigated the conservation of optical angular momentum.
authors.forename: Gyeong Bok
authors.initials: GB
authors.lastname: Jung
authors.forename: Keiichiro
authors.initials: K
authors.lastname: Kanaya
authors.forename: Takashige
authors.initials: T
authors.lastname: Omatsu