Related Experiment Video
Updated: Aug 28, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Integrated communication and polarization sensing in self-homodyne coherent systems
Abstract:
We propose and demonstrate an integrated polarization sensing technique by fully exploiting the adaptive polarization controller (APC) in a self-homodyne coherent (SHC) communication system. By analyzing the APC control signal, the input state of polarization (SOP) can be fully restored. The effect of the polarization tracking results on sensing accuracy is carefully studied in simulation to determine the acceptable SOP rotation speed. We experimentally restore the SOP rotation trajectory using an APC, conduct a comparison with a polarization analysis instrument, and verify its potential as a polarization measurement. Finally, without additional components or burdening digital signal processing (DSP), in-service detections of up to 400-Hz vibration and 2.4-nε micro-strain are achieved in the operated SHC system with 400-Gb/s DP-16QAM transmission.
Related Concept Videos
IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations
Induced Electric Dipoles
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
Group Polarization
Dielectric Polarization in a Capacitor
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)
Self-Inductance
Consider a circuit connected to an AC source. As the current varies with time, the magnetic flux through the circuit correspondingly changes. Faraday's law tells us that an emf would...

