title: Light-enhanced electro-optic spectral tuning in annealed proton-exchanged periodically poled lithium niobate channel waveguides.
abstract: We report the observation of light-enhanced electro-optic spectral tuning in annealed proton-exchanged, asymmetric domain-duty-cycle periodically poled lithium niobate (PPLN) channel waveguides for second-harmonic generation. The spectral tuning rate was increased rapidly from 0.07 nm/(kV/mm) to a saturated value of 0.32 nm/(kV/mm) in a 30%/70% domain-duty-cycle PPLN waveguide when the fundamental pump power near 1534 nm was increased from 0.6 to 46 mW. The second-harmonic laser power at 767 nm was identified to be the source enhancing the spectral tuning.
authors.affiliation: Department of Electrical Engineering, National Tsinghua University, Hsinchu, Taiwan.
authors.forename: Y Y
authors.initials: YY
authors.lastname: Lin
authors.forename: Y F
authors.initials: YF
authors.lastname: Chiang
authors.forename: Y C
authors.initials: YC
authors.lastname: Huang
authors.forename: A C
authors.initials: AC
authors.lastname: Chiang
authors.forename: S T
authors.initials: ST
authors.lastname: Lin
authors.forename: Y H
authors.initials: YH
authors.lastname: Chen