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Not Available We propose the development of a novel, all-optical cooling device capable of reaching liquid nitrogen temperatures. The device can be readily adapted and retrofitted to existing infrared (JR) detectors. The cooling medium for our device is molecular-based and has inherent advantages over existing mechanical cryogenic coolers. The optical cooling effect is based on frequency up-conversion. Our innovative features include no moving parts operation at convenient laser wavelengths, inherent energy efficiency, solid state design, small size and weight, immunity from electromagnetic interferences, long operational lifetime, and inexpensive to manufacture. The Phase I program will theoretically and experimentally determine the feasibility of the concept. BENEFITS: Development of a device with far-reaching commercial application. The potential to make inexpensive, efficient cooling devices that are driven by lasers may revolutionize satellite, computer, and high temperature superconductor industries. The potential for commercially viable spin-off technologies such as solid-state blue lasers, self-regulating thermo-electrical components, and temperature sensors is high.