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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
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Polarization fading suppression in distributed interferometric sensing by matched interference between
Optics Express
|October 12, 2022
Summary
This study introduces a novel polarization fading suppression technique for distributed interferometric sensing. The method enhances robustness and reliability in distributed acoustic sensing by selecting higher visibility outputs.
Area of Science:
- Optics
- Photonics
- Sensing Technology
Background:
- Polarization fading significantly degrades performance in distributed interferometric sensing systems.
- Existing methods struggle to consistently mitigate polarization-induced signal loss.
- Robust distributed sensing is crucial for applications like structural health monitoring and security.
Purpose of the Study:
- To propose and validate a polarization fading suppression technique for distributed interferometric sensing.
- To improve the robustness and reliability of distributed acoustic sensing (DAS) systems.
- To achieve high-visibility interferometric outputs for accurate signal demodulation.
Main Methods:
- A technique based on matched interference between polarization-switched pulses is developed.
- Two sets of interferometric outputs are generated for each sensor: one with parallel, one with orthogonal polarizations.
- The output with higher visibility (no less than 2/2) is selected for signal demodulation.
Main Results:
- The proposed method significantly suppresses the influence of polarization fading.
- Distributed acoustic sensing systems demonstrate notably improved robustness.
- Enhanced reliability in signal detection and measurement is achieved.
Conclusions:
- The polarization-switched pulse interference technique effectively overcomes polarization fading.
- This method offers a reliable solution for enhancing distributed interferometric sensing performance.
- The technique paves the way for more dependable distributed acoustic sensing applications.
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