Mid-infrared guided optics: a perspective for astronomical instruments

TL;DR

This paper reviews recent advances in mid-infrared guided optics for astronomical instruments, highlighting their potential to simplify designs and enhance performance in observing warm objects and biosignatures.

Contribution

It provides a comprehensive review of mid-infrared photonic device development, manufacturing technologies, and performance evaluations for future astronomical applications.

Findings

Photonic devices can significantly simplify astronomical instruments.

Current manufacturing technologies are approaching required performance levels.

Mid-infrared photonics enable new observational capabilities for astronomy.

Abstract

Research activities during the last decade have shown the strong potential of photonic devices to greatly simplify ground based and space borne astronomical instruments and to improve their performance. We focus specifically on the mid-infrared wavelength regime (about 5-20 microns), a spectral range offering access to warm objects (about 300 K) and to spectral features that can be interpreted as signatures for biological activity (e.g. water, ozone, carbon dioxide). We review the relevant research activities aiming at the development of single-mode guided optics and the corresponding manufacturing technologies. We evaluate the experimentally achieved performance and compare it with the performance requirements for applications in various fields of astronomy. Our goal is to show a perspective for future astronomical instruments based on mid-infrared photonic devices.