title: All-optical non-conjugated wavelength multicasting of QPSK signal with capability of phase regeneration.
abstract: We propose all-optical one-to-three non-conjugated wavelength multicasting of QPSK signal with capability of phase regeneration, using dual-conjugated-pump phase sensitive amplification (PSA). Based on the seven-wave model, we can obtain phase transfer functions of individual multicasting channel. Different from two multicasting copies, the phase regeneration performance of input signal is determined by the nonlinear phase shift. Moreover, the optimal squeezing points of three multicasting channels have a deviation. Thus, there exists a regeneration performance trade-off among three multicasting channels. Our numerical simulation shows that the error vector magnitude (EVM) of 50 Gb/s QPSK signal can be successfully improved when both nonlinear phase shift and four-state position in its constellation are optimized. The calculated BER curves verify that the OSNR penalties of three multicasting channels are improved by around 1dB at BER = 10(-3).
authors.forename: Junzi
authors.initials: J
authors.lastname: Lian
authors.forename: Songnian
authors.initials: S
authors.lastname: Fu
authors.forename: Yan
authors.initials: Y
authors.lastname: Meng
authors.forename: Ming
authors.initials: M
authors.lastname: Tang
authors.forename: Perry
authors.initials: P
authors.lastname: Shum
authors.forename: Deming
authors.initials: D
authors.lastname: Liu
mesh_terms: D004867:Equipment Design; D005336:Fiber Optic Technology / Q000295:instrumentation*; D008962:Models, Theoretical; D055096:Optical Devices; D012815:Signal Processing, Computer-Assisted; D013685:Telecommunications / Q000295:instrumentation*