17 May 2016 Cooling enhancement in optical refrigeration by non-resonant optical cavities
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Abstract
We present a study of cooling enhancement in optical refrigerators by the implementation of advanced non-resonant optical cavities. Cavity designs have been studied to maximize pump light-trapping to improve absorption and thereby increase the efficiency of optical refrigeration. The approaches of non-resonant optical cavities by Herriott-cell and totalinternal- reflection were studied. Ray-tracing simulations and experiments were performed to analyze and optimize the different light-trapping configurations. Light trapping was studied for laser sources with high quality beams and for beams with large divergences, roughly corresponding to the output from fiber lasers and from diode lasers, respectively. We present a trade-off analysis between performance, reliability, and manufacturability.
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B. G. Farfan, A. Gragossian, G. Symonds, M. R. Ghasemkhani, A. R. Albrecht, M. Sheik-Bahae, R. I. Epstein, "Cooling enhancement in optical refrigeration by non-resonant optical cavities", Proc. SPIE 9821, Tri-Technology Device Refrigeration (TTDR), 982104 (17 May 2016); doi: 10.1117/12.2222181; https://doi.org/10.1117/12.2222181
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