LAUSR

Abstract Phase sensitive amplifiers have wide range applications in optical communication for low-noise amplification and phase noise mitigation. HNLF-based PSAs have overwhelming extra advantages because of its ultrafast response time, lower loss and controllable dispersion, which enable flexible structures of PSAs. These PSAs are able to provide the desired gain and phase response profiles if their configuration parameters are suitably arranged. The parameter optimization of a PSA involves solving a set of coupled differential equations. It is pretty cumbersome to solve many sets of coupled differential equations for various PSAs. In the paper, we introduced a universal multi-wave numerical model based on a set of coupled differential equations, which enables theoretically and numerically to investigate PSAs with various structures. We used the foregoing universal multi-wave model to simulate three different types of PSAs and achieved the four-step staircase phase response for phase regeneration of QPSK signals by optimizing PSAs’ parameters.