title: 160-Gb/s all-optical phase-transparent wavelength conversion through cascaded SFG-DFG in a broadband linear-chirped PPLN waveguide.
abstract: We experimentally demonstrated ultra-fast phase-transparent wavelength conversion using cascaded sum- and difference-frequency generation (cSFG-DFG) in linear-chirped periodically poled lithium niobate (PPLN). Error-free wavelength conversion of a 160-Gb/s return-to-zero differential phase-shift keying (RZ-DPSK) signal was successfully achieved. Thanks to the enhanced conversion bandwidth in the PPLN with linear-chirped periods, no optical equalizer was required to compensate the spectrum distortion after conversion, unlike a previous demonstration of 160-Gb/s RZ on-off keying (OOK) using fixed-period PPLN.
authors.affiliation: National Institute of Information and Communications Technology, 4-1-1, Nukui-Kitamachi, Koganei, Tokyo 184-8795, Japan. gordon.guoweilu@gmail.com
authors.forename: Guo-Wei
authors.initials: GW
authors.lastname: Lu
authors.forename: Satoshi
authors.initials: S
authors.lastname: Shinada
authors.forename: Hideaki
authors.initials: H
authors.lastname: Furukawa
authors.forename: Naoya
authors.initials: N
authors.lastname: Wada
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Miyazaki
authors.forename: Hiromasa
authors.initials: H
authors.lastname: Ito
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D016014:Linear Models; D008872:Microwaves; D012031:Refractometry / Q000295:instrumentation*; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D013685:Telecommunications / Q000295:instrumentation*