title: Simultaneous generation of helical beams with linear and radial polarization by use of a segmented half-wave plate.
abstract: Simultaneous generation of helical beams with linear and radial polarization is demonstrated by use of a segmented half-wave plate in a Ti:sapphire laser cavity. A linearly polarized Laguerre-Gaussian beam is converted to a radially polarized beam with a spiral phase shift and vice versa. In addition, these two beams coexist in the cavity, and the cavity emits one of these two beams from an output coupler.
authors.affiliation: Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan.
authors.forename: Hikaru
authors.initials: H
authors.lastname: Kawauchi
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Kozawa
authors.forename: Shunichi
authors.initials: S
authors.lastname: Sato
authors.forename: Takashi
authors.initials: T
authors.lastname: Sato
authors.forename: Shojiro
authors.initials: S
authors.lastname: Kawakami