Abstract

A previously published photonic link architecture was shown to suppress a high-power interference signal of a specific amplitude while permitting recovery of lower-power signals of interest. One undesirable feature of this architecture was the generation of an output intermodulation distortion product that was inherently as strong as the output signal at the frequency of the signal of interest. This article describes a modification to the previously published interference suppression architecture that eliminates this undesirable side effect by applying aspects of one established technique for enhancing the spurious-free dynamic range of analog photonic links along with aspects of a second established technique for accomplishing single-sideband modulation of a Mach–Zehnder electro-optic modulator. The improved performance of this modified architecture is explained using a mathematical model and is verified by the measured input/output characteristics of hardware in a proof-of-concept laboratory demonstration.

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