Demonstration of a fiber-coupled optical cryocooler: a step towards future space applications

Rémi Vicente; Gilles Nogues; Laurent Del-Rey; Jérôme Debray; David Jegouso; Jean-François Motte; Giovanni Cittadino; Alberto Di Lieto; Mauro Tonelli; Jean-Michel Niot; Arnaud Gardelein

doi:10.1117/12.2576883

5 March 2021 Demonstration of a fiber-coupled optical cryocooler: a step towards future space applications

Rémi Vicente, Gilles Nogues, Laurent Del-Rey, Jérôme Debray, David Jegouso, Jean-François Motte, Giovanni Cittadino, Alberto Di Lieto, Mauro Tonelli, Jean-Michel Niot, Arnaud Gardelein

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Proceedings Volume 11702, Photonic Heat Engines: Science and Applications III; 1170203 (2021) https://doi.org/10.1117/12.2576883
Event: SPIE OPTO, 2021, Online Only

Abstract

We report on the design, fabrication and testing of the first laser cryocooler prototype made in Europe. The proposed architecture is based on a 7.5%-Yb:YLF cooling crystal located at the center of an astigmatic multipass cavity. A 1020 nm, 50 W laser is fiber coupled through the first cavity mirror, allowing the laser source to be located at any distance from the cold head. Encouraging preliminary results show good coupling efficiency of the laser source, stable temperature of the crystal and a minimum achieved temperature below 150 K with only 8.8 W of laser power, leaving margins for further improvements.

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Rémi Vicente, Gilles Nogues, Laurent Del-Rey, Jérôme Debray, David Jegouso, Jean-François Motte, Giovanni Cittadino, Alberto Di Lieto, Mauro Tonelli, Jean-Michel Niot, and Arnaud Gardelein "Demonstration of a fiber-coupled optical cryocooler: a step towards future space applications", Proc. SPIE 11702, Photonic Heat Engines: Science and Applications III, 1170203 (5 March 2021); https://doi.org/10.1117/12.2576883

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