Fast Polarization Switch for Polarization-Based Quantum Communication

TL;DR

This paper introduces a rapid polarization switching system for quantum communication, integrating optoelectronic components and FPGA-based control to enable efficient polarization visualization and manipulation.

Contribution

The paper presents a complete FPGA-based optoelectronic unit for fast polarization switching, combining polarization visualization, control, and an optimal tracking algorithm.

Findings

Simulation results demonstrate the feasibility of fast polarization switching.

The system effectively integrates analog polarimetry with digital control.

Potential applications in quantum communication protocols.

Abstract

We present a complete optoelectronic unit for polarization visualization, switching and control. The system is based on an FPGA unit and comprises: an acquisition unit containing an analog polarimeter and digital-to-analog converters, an FPGA capable of implementing an optimal algorithm for three-stage arbitrary polarization tracking, and an electronic driver with analog-to-digital converters capable of interfacing with Lithium-Niobate-based Polarization Controllers. The results, determined via simulation of real-parameter devices, show that fast polarization switch is achievable.