Exploring Mid-Wave Infrared Metrology

Aug. 17, 2023

Discover the future of optical qualification! Our latest research dives into the realm of Mid-Wave Infrared (MWIR) metrology using quadriwave lateral shearing interferometry and low coherence quantum cascade laser sources.

πŸ“š Authors: Benoît Wattellier, Aurélie Bétourné, Ivan Doudet, Bertille Ghesquière, Adrien Pallares

πŸ“– Read more: Proceedings Volume 12777, International Conference on Space Optics — ICSO 2022; 1277716 (2023)

πŸš€ Delving into the Details:

Our study delves into the feasibility of metrology in the MWIR range (3-5µm), an area rich in valuable information for space and terrestrial applications. We demonstrate the implementation of Interband Cascade Lasers for double-pass optical qualification.


πŸ” The Intricacies:

Our research unveils how quadriwave lateral shearing interferometry (QWLSI) enables high-precision wave front sensing. It samples impinging wave fronts through a 2D diffraction grating, revealing wave front gradients through interference patterns. Unlike traditional methods, QWLSI is achromatic, adaptable to various light sources.

πŸ’‘ Advancing Metrology:

We propose Quantum Cascade Lasers (QCL) and Interband Cascade Lasers (ICL) as sources for their wide range of wavelength options especially in the MWIR and LWIR ranges. The versatility and reduced noise of these lasers make them promising candidates for optical metrology in space applications.

πŸ”¬ Shaping the Future:

Our work at PHASICS has led to a metrology instrument operating at 3.8μm with phase noise below 3 nm RMS (λ/1200), ensuring the accuracy required for space optics. By optimizing laser coherence and utilizing cutting-edge technology, we're pushing the boundaries of metrology in the MWIR range.

πŸ›°οΈ Embracing Possibilities:

As we explore the potential of QCL and ICL sources, we envision a future where we can qualify space optics with unprecedented precision. Our goal is to contribute to advancements in optical technologies that will shape the exploration of space and enhance our understanding of the cosmos.

Stay tuned as we continue to unravel the mysteries of Mid-Wave Infrared metrology and its implications for space optics! 🌠 #OpticalMetrology #SpaceOptics #MWIRMetrology



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