Title :
Format Conversion of Optical Multilevel Signals Using FWM-Based Optical Phase Erasure
Author :
Lu, Guo-Wei ; Tipsuwannakul, Ekawit ; Miyazaki, Tetsuya ; Lundström, Carl ; Karlsson, Magnus ; Andrekson, Peter A.
Author_Institution :
Nat. Inst. of Informa tion & Commun. Technol., Tokyo, Japan
Abstract :
An optical format conversion scheme of multilevel phase-shift keying (M-ary PSK) signals using the four-wave mixing based optical phase erasure is discussed in this paper. The conversion from differential quadrature phase-shift keying (DQPSK) to differential phase shift keying at 10 and 160 Gbaud, and the conversion from differential eight-ary phase-shift keying to DQPSK at 40 Gbaud have been experimentally demonstrated. The proposed scheme could be used as a phase erasure, in which a redundant tributary of the M-ary PSK signal is removed, or as an “updater” where the unwanted phase pattern is replaced with the new pattern.
Keywords :
differential phase shift keying; multiwave mixing; optical wavelength conversion; quadrature phase shift keying; FWM-based optical phase erasure; differential eight-ary phase-shift keying; differential quadrature phase-shift keying; four-wave mixing; multilevel phase-shift keying; optical format conversion; optical multilevel signals; phase pattern; redundant tributary; Differential phase shift keying; Fiber nonlinear optics; Optical fibers; Optical signal processing; Phase shift keying; Differential phase-shift keying (DPSK); differential 8-ary phase-shift keying (D8PSK); differential quadrature phase-shift keying (DQPSK); format conversion; four-wave mixing (FWM); optical fiber communications; phase modulation;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2011.2160977
