# Computational distributed fiber-optic sensing

## TL;DR

This paper introduces a computational distributed fiber-optic sensing method that leverages temporal ghost imaging principles to significantly reduce sampling rates and simplify sensor design.

## Contribution

It demonstrates a novel temporal analogue of ghost imaging for fiber-optic sensing, achieving a 1000-fold reduction in sampling rate compared to traditional methods.

## Key findings

- Achieved 3 orders of magnitude reduction in sampling rate
- Enabled simplified and cost-effective distributed fiber-optic sensing
- Validated the approach through experimental demonstrations

## Abstract

Ghost imaging allows image reconstruction by correlation measurements between a light beam that interacts with the object without spatial resolution and a spatially resolved light beam that never interacts with the object. The two light beams are copies of each other. Its computational version removes the requirement of a spatially resolved detector when the light intensity pattern is pre-known. Here, we exploit the temporal analogue of computational ghost imaging, and demonstrate a computational distributed fiber-optic sensing technique. Temporal images containing spatially distributed scattering information used for sensing purposes are retrieved through correlating the "integrated" backscattered light and the pre-known binary patterns. The sampling rate required for our technique is inversely proportional to the total time duration of a binary sequence, so that it can be significantly reduced compared to that of the traditional methods. Our experiments demonstrate a 3 orders of magnitude reduction in the sampling rate, offering great simplification and cost reduction in the distributed fiber-optic sensors.

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Source: https://tomesphere.com/paper/1904.06659