title: Multiple-channel optical signal processing with wavelength-waveform conversions, pulsewidth tunability, and signal regeneration.
abstract: A multiple-channel multiple-function optical signal processor (MCMF-OSP) including wavelength-waveform conversions, pulsewidth tunability, and signal regeneration is realized through AND logic gate based on optical parametric processing with a pulsewidth-tunable RZ clock pump. The proposed scheme simultaneously offers four signal processing functions which are useful in wavelength-division multiplexing (WDM) transmission systems, and at network nodes with the necessity for multiple-channel data processing. After the discussions on the concept of MCMF-OSP, a proof-of concept experiment is demonstrated on four 10 Gb/s nonreturn-to-zero (NRZ) data format channels using nonlinearities in semiconductor optical amplifier (SOA) and highly nonlinear fiber (HNLF). A wavelength and waveform conversions to return-to-zero (RZ) modulation format are obtained together with pulsewidth-tunable range from 20% to 80% duty cycles for all input signals. The converted signals inherit the timing and waveform of the RZ clock pump, thus resulting in a time regeneration and large tolerance to narrow-band optical filtering (NAOF) and fiber accumulated chromatic dispersion (CD).
authors.affiliation: The Department of Information and Communication Engineering, University of Electro-Communications, Tokyo, 182-8585, Japan. hung@ice.uec.ac.jp
authors.forename: Hung
authors.initials: H
authors.lastname: Nguyen Tan
authors.forename: Motoharu
authors.initials: M
authors.lastname: Matsuura
authors.forename: Tomoya
authors.initials: T
authors.lastname: Katafuchi
authors.forename: Naoto
authors.initials: N
authors.lastname: Kishi
mesh_terms: D000669:Amplifiers, Electronic; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D055096:Optical Devices; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*