Abstract

A theoretical approach to evaluate quantum noise in gain-saturated fiber-based optical parametric amplifiers (OPAs) is presented. An equivalent input noise model that considers quantum noise is introduced, and an approximate expression of the saturated gain is presented to obtain the analytical formulas of the probability density function and the variance of signal fluctuations. Using this approach, the noise figure of gain-saturated OPAs can be analytically evaluated.

© 2020 Optical Society of America

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