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## Introduction of the theoratical model (7-wave model and CNLSE)  The dual-pump signal-idler degenerate single-mode PS-FOPA considered in this work is shown schematically in Fig.1. The signal and idler coincide in frequency (degenerate) while the two a pair of phase-correlated  pumps are allocated symmetrically surrounded the them ## Asymmetrical Phase-sensitive Extinction Ratio (Differences between amplification and de-amplification)