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To improve the performance and capability of the transmission networks, all-optical processing of the complex high-order modulation signals such as phase regeneration, quadrature decomposition, and modulation format conversion, which predominates the electronic processing in terms of traffic cost and flexibility, is further demanded as respect to the endless pursuit of low noise amplifier.   During the past decade, phase-sensitive fiber-optic parametric amplifiers based on FWM four-wave mixing (FWM)  in HNLFs highly nonlinear fiber (HNLF)  has due become a strong candidate for all-optical processing owing  to its potential ultra-fast response time, the intrinsically noiseless amplification, and especially the capability of phase-squeezing. Several demonstrations for