VPI Technology Group proposes to develop a solid-state compact solar simulator for increased reliability and control. The simulator incorporates a dense array of LEDs whose aggregate wavelengths and power outputs are representative of solar irradiance at the top of the Earths atmosphere. The designs operational life will be significantly greater than 1,000 hours, and a modular structure permits rapid replacement of aged or malfunctioning components. Up to 42 distinct emitters will cover from far UV (200 nm) to near IR (2500 nm). The user can set each bands power output through either analog or PWM control. Particular emphasis will be given to the power output in the damaging far UV region (200nm400 nm) where we will experiment with laser pumped optical frequency doublers to provide the necessary power.100% of the sun spectra will be generated with solid-state LEDs and lasers, removing the dependence on the time-limited parts used in gas-discharge systems. Local temperature and current monitoring will provide early warning of thermal runaway. Mechanical designfor efficient heat removal permits long term operation. VPI will pursue an aggressive and innovative thermal management design to minimize LED die temperatures and thus maximize the devices operational life.solar,Simulator,UV,Radiation,solid-state,nanometers,Irradiance,Controlled
