Three-Dimensional Mid-Infrared Photonics: Recent Progress in Ultrafast Laser Writing of Waveguides

TL;DR

This paper reviews recent advances in 3D direct laser writing of waveguides for mid-infrared photonics, highlighting progress in fabricating waveguides across various dielectric materials for broad infrared applications.

Contribution

It demonstrates the successful fabrication of mid-infrared waveguides using 3D direct laser writing across multiple dielectric substrates, expanding the potential for integrated mid-infrared photonic devices.

Findings

Waveguides successfully written in diverse dielectric substrates.

Mid-infrared waveguiding demonstrated across the entire transparency range.

Advances enable new applications in mid-infrared photonics.

Abstract

We present here our recent progress in the three-dimensional (3D) direct laser writing (DLW) of step-index core waveguides inside diverse technologically relevant dielectric substrates, with specific emphasis on the demonstration of DLW mid-infrared waveguiding in the whole transparency range of these materials.