High Performance Polarization Management Devices Based on Thin-Film Lithium Niobate

TL;DR

This paper presents advanced thin-film lithium niobate photonic integrated circuits enabling ultra-fast, low-voltage, and compact polarization management devices with high fidelity and speed, surpassing traditional bulky optical components.

Contribution

It introduces a suite of integrated polarization management devices on thin-film lithium niobate, achieving unprecedented speed, efficiency, and miniaturization in polarization control technologies.

Findings

Polarization extinction ratio up to 41.9 dB

Scrambling rate up to 65 Mrad/s

Tracking speed up to 10 Krad/s

Abstract

High-speed polarization management is highly desirable for many applications, such as remote sensing, telecommunication, and medical diagnosis. However, most of the approaches for polarization management rely on bulky optical components that are slow to respond, cumbersome to use, and sometimes with high drive voltages. Here, we overcome these limitations by harnessing photonic integrated circuits based on thin-film lithium niobate platform. We successfully realize a portfolio of thin-film lithium niobate devices for essential polarization management functionalities, including arbitrary polarization generation, fast polarization measurement, polarization scrambling, and automatic polarization control. The present devices feature ultra-fast control speed, low drive voltages, low optical losses and compact footprints. Using these devices, we achieve high fidelity polarization generation with a polarization extinction ratio up to 41.9 dB, fast polarization scrambling with a scrambling rate up to 65 Mrad/s, and endless polarization control with a tracking speed up to 10 Krad/s, all of which are best results in integrated optics. The demonstrated devices unlock a drastically new level of performance and scales in polarization management devices, leading to a paradigm shift in polarization management.