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Laser coolers are an innovative class of coolers capable of reaching cryogenics temperatures in a miniaturized, contact-less and entirely vibration free way. Hence they are considered as a potential breakthrough technology for space cryogenics, especially in the field of earth-observation missions. We have developed and successfully operated a fiber-coupled laser cooling prototype. We will present a possible architecture for the laser source that could meet space requirements and review possible alternative solutions like intra-cavity cooling and using Ho-doped fluoride crystals.
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Gilles Nogues, Rémi Vicente, Arnaud Gardelein, Mauro Tonelli, Alberto Di Lieto, Bauke Heeg, "Laser cooling for space cryogenics: practical implementations," Proc. SPIE PC12437, Photonic Heat Engines: Science and Applications V, PC1243707 (17 March 2023); https://doi.org/10.1117/12.2657085