title: Monolithically integrated multi-wavelength filter and second harmonic generator in aperiodically poled lithium niobate.
abstract: We report on the design and experimental characterization of aperiodically poled lithium niobate (APLN) crystals for use in monolithically integrated dual nonlinear-optical devices. A cascade and a single aperiodic-domain-structure designs based on simulated annealing method were constructed in LiNbO(3) to simultaneously perform as 4-channel electro-optically active (EOA) filters and 4-channel frequency doublers in the telecom band. We found that we could obtain a 2.44-fold enhancement in second-harmonic-generation conversion efficiency and a 2.4-time reduction in filter transmission bandwidth with the single APLN device over the cascade one when the same device length of 2 cm and the EOA field of 1027 V/mm were used.
authors.affiliation: Department of Optics and Photonics, National Central University, Jhongli, Taiwan.
authors.forename: C L
authors.initials: CL
authors.lastname: Chang
authors.forename: Y H
authors.initials: YH
authors.lastname: Chen
authors.forename: C H
authors.initials: CH
authors.lastname: Lin
authors.forename: J Y
authors.initials: JY
authors.lastname: Chang