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Number of Papers published in peer-reviewed journals: Final Report: Modeling and Theoretical Analysis of On-Chip Phase-Sensitive Amplifiers Report Title We performed a theoretical study of phase-sentisitive amplification in semiconductor optical amplifiers (SOAs), so as to support and orient the experimental activity lead by other project partners. A major outcome of our research is the development of a model for multiwavelength mixing in semiconductor optical amplifiers (SOAs) based on coupled-mode equations. The proposed model applies to all kinds of SOA structures, takes into account the longitudinal dependence of carrier density caused by saturation, it accommodates an arbitrary functional dependencies of the material gain and carrier recombination rate on the local value of carrier density, and is computationally more efficient by orders of magnitude as compared with the standard full model based on space-time equations. We tested the model accuracy through comparison with brute-force simulations of the space-time equations. The phase-dependent gain predicted by the model is in excellent agreement with the experimenal results obtained by a project partner. We further elaborated on the model so as to assess the noise figure of various PSA configurations based on the use of SOAs. A Matlab code which implements this functionality, as well as the multiwavelength mixing analysis is made available to the funding agency. (a) Papers published in peer-reviewed journals (N/A for none) Enter List of papers submitted or published that acknowledge ARO support from the start of the project to the date of this printing. List the papers, including journal references, in the following categories: (b) Papers published in non-peer-reviewed journals (N/A for none) 04/14/2016 04/14/2016 Received Paper