title: All-optical technique for modulation format conversion from NRZ-OOK to RZ-16QAM employing nonlinear optical loop mirror with 1:2 coupler.
abstract: All-optical technique for modulation format conversion from 4 channels non-return-to-zero on-off-keying (OOK) to return-to-zero 16 quadrature amplitude modulation (16QAM) employing nonlinear optical loop mirror with 1:2 coupler configuration is proposed and experimentally demonstrated at 10Gs/s. The experimentally converted 16QAM signal was distorted in its phase by cross-phase modulation induced amplitude-to-phase noise conversion. The effect of amplified spontaneous emission noise in the amplified OOK signals to the converted 16QAM's phase was theoretically discussed.
authors.affiliation: Graduate School of Engineering, Osaka University, Suita, Osaka, Japan.
authors.forename: Guoxiu
authors.initials: G
authors.lastname: Huang
authors.forename: Yuji
authors.initials: Y
authors.lastname: Miyoshi
authors.forename: Akihiro
authors.initials: A
authors.lastname: Maruta
authors.forename: Ken-ichi
authors.initials: K
authors.lastname: Kitayama
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D007834:Lasers; D055100:Optical Fibers; D012031:Refractometry / Q000295:instrumentation*; D012666:Semiconductors; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D013685:Telecommunications / Q000295:instrumentation*; D014159:Transducers