Astigmatic Herriott cell for optical refrigeration

Aram Gragossian; Junwei Meng; Mohammadreza Ghasemkhani; Alexander R. Albrecht; Mansoor Sheik-Bahae

doi:10.1117/1.OE.56.1.011110

16 December 2016 Astigmatic Herriott cell for optical refrigeration

Aram Gragossian, Junwei Meng, Mohammadreza Ghasemkhani, Alexander R. Albrecht, Mansoor Sheik-Bahae

Author Affiliations +

Optical Engineering, Vol. 56, Issue 1, 011110 (December 2016). https://doi.org/10.1117/1.OE.56.1.011110

Abstract

Cooling rare-earth-doped crystals to the lowest temperature possible requires enhanced resonant absorption and high-purity crystals. Since resonant absorption decreases as the crystal is cooled, the only path forward is to increase the number of roundtrips that the laser makes inside the crystal. To achieve even lower temperatures than previously reported, we have employed an astigmatic Herriott cell to improve laser absorption at low temperatures. Preliminary results indicate improvement over previous designs. This cavity potentially enables us to use unpolarized high-power fiber lasers, and to achieve much higher cooling power for practical applications.

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Aram Gragossian, Junwei Meng, Mohammadreza Ghasemkhani, Alexander R. Albrecht, and Mansoor Sheik-Bahae "Astigmatic Herriott cell for optical refrigeration," Optical Engineering 56(1), 011110 (16 December 2016). https://doi.org/10.1117/1.OE.56.1.011110

Published: 16 December 2016

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