Concept and implementation study of advanced DSP-based fiber-longitudinal optical power profile monitoring toward optical network tomography [Invited]

A new class of digital signal processing (DSP)-based fiber-longitudinal optical power profile monitor has recently been proposed and demonstrated toward optical network tomography that captures the whole physical status of an optical network, including in-span and wavelength-specific power profiles over a multi-span transmission light path. In this invited paper, we review the monitor that disentangles signal waveforms received by a standard digital coherent receiver to a distance-wise power profile over a multi-span transmission link and discuss its implementation aspect, including the advantages and limitations of its cloud/edge implementation, the dependency of the number representation in its algorithm, and a feasibility study on field-programmable gate array implementation.