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. 2022 Nov 7;30(23):42525-42540.
doi: 10.1364/OE.473479.

Design and characterization of "flow-cell" integrated-flow active cooling for high-average-power ceramic optics

E P Power, S Bucht, K R P Kafka, J Bromage, J D Zuegel
Free article

Design and characterization of "flow-cell" integrated-flow active cooling for high-average-power ceramic optics

E P Power et al. Opt Express. .
Free article

Abstract

We used COMSOL Multiphysics to design a prototype actively cooled "flow-cell" substrate targeted at high-average-power applications, fabricated the prototype from cordierite ceramic, and tested the substrate under load in our thermal loading test stand. Sub-aperture testing revealed average-power handling up to 3.88-W/cm2 absorbed power density, in excellent agreement with model predictions. Gratings fabricated on 2-in.-diam cordierite coupons were subjected to laser-damage testing and showed a damage threshold of 250 mJ/cm2.

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