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. 2018 Jun 6;7:15. doi: 10.1038/s41377-018-0028-7

Fig. 6. Performance of the solid-state optical cryocooler.

Fig. 6

a Temperature of the coldfinger (solid trace) and YLF:10%Yb crystal (dotted trace) as a function of time after turning on the 1020-nm laser in steps from 0, 12, 25, to 47 W. A steady-state coldfinger temperature of 134.9 K was reached after 4 h. b Heat load curve of the cryocooler pumped at 47 W, showing an initial slope of 0.31 K/mW