title: All-optical AND and NAND gates based on cascaded second-order nonlinear processes in a Ti-diffused periodically poled LiNbO(3) waveguide.
abstract: All-optical AND and NAND gates have been demonstrated in a Ti-diffused periodically poled LiNbO(3) channel waveguide which has two second-harmonic phase-matching peaks by cascaded sum-frequency-generation/difference-frequency-generation (cSFG/DFG) and sum-frequency-generation (SFG) processes. The conversion efficiency of signal to idler (AND gate signal) was approximately 0 dB in cSFG/DFG process. In the second SFG process, more than 15 dB extinction ratio between signal and dropped signal (NAND gate signal) has been observed.
authors.forename: Yeung Lak
authors.initials: YL
authors.lastname: Lee
authors.forename: Bong-Ahn
authors.initials: BA
authors.lastname: Yu
authors.forename: Tae Joong
authors.initials: TJ
authors.lastname: Eom
authors.forename: Woojin
authors.initials: W
authors.lastname: Shin
authors.forename: Changsoo
authors.initials: C
authors.lastname: Jung
authors.forename: Young-Chul
authors.initials: YC
authors.lastname: Noh
authors.forename: Jongmin
authors.initials: J
authors.lastname: Lee
authors.forename: Do-Kyeong
authors.initials: DK
authors.lastname: Ko
authors.forename: Kyunghwan
authors.initials: K
authors.lastname: Oh