title: Planar optical waveguide in Cu-doped potassium sodium strontium barium niobate crystal formed by mega-electron-volt He-ion implantation.
abstract: The first planar optical waveguide to the authors' knowledge has been formed in Cu-doped potassium sodium strontium barium niobate crystal by mega-electron-volt He(+) implantation. Both TE and TM modes are observed. The profiles of the ordinary and the extraordinary refractive indices are deduced from dark-line mode spectroscopy. The results show that the mega-electron-volt He implantation results in a decrease in refractive index in barriers for both n(o) and n(e), but for n(e) there is an obvious increase in the waveguide region. From an experiment in photorefractive two-wave mixing, it is found that the erasure time for two-wave mixing is prolonged by ion implantation.
authors.forename: F
authors.initials: F
authors.lastname: Lu
authors.forename: M Q
authors.initials: MQ
authors.lastname: Meng
authors.forename: K M
authors.initials: KM
authors.lastname: Wang
authors.forename: X D
authors.initials: XD
authors.lastname: Liu
authors.forename: H C
authors.initials: HC
authors.lastname: Chen
authors.forename: D Y
authors.initials: DY
authors.lastname: Shen