160-Gb/s all-optical phase-transparent wavelength conversion through cascaded SFG-DFG in a broadband linear-chirped PPLN waveguide.
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.
Lu
Guo-Wei
GW
National Institute of Information and Communications Technology, 4-1-1, Nukui-Kitamachi, Koganei, Tokyo 184-8795, Japan. gordon.guoweilu@gmail.com
Shinada
Satoshi
S
Furukawa
Hideaki
H
Wada
Naoya
N
Miyazaki
Tetsuya
T
Ito
Hiromasa
H
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*