Silicon photonics integrated dynamic polarization controller for continuous-variable quantum key distribution

TL;DR

This paper presents a silicon photonics integrated dynamic polarization controller designed for continuous-variable quantum key distribution, achieving high polarization extinction and potential for miniaturization and cost reduction.

Contribution

The paper introduces a novel silicon photonics polarization controller with a variable step simulated annealing approach for quantum key distribution systems.

Findings

Achieved polarization extinction ratio >25 dB

Demonstrated experimental implementation of the controller

Potential for size reduction and cost decrease in quantum systems

Abstract

We designed and demonstrated experimentally a silicon photonics integrated dynamic polarization controller which is a crucial component of a continuous-variable quantum key distribution system. By using a variable step simulated annealing approach, we achieve a dynamic polarization extinction ratio greater than 25 dB. The dynamic polarization controller can be utilized in silicon photonics integrated continuous-variable quantum key distribution system to minimize the size and decrease the cost further.