Abstract

To the best of our knowledge we report the first demonstration of surface thermometry using laser-induced second-harmonic generation (SHG) on a realistic metallic surface at atmospheric pressure. The surface is probed with a pulsed infrared laser beam and the SHG signal is monitored in reflection. For metallic silver, the SHG signal is found to be temperature dependent in the 25–120 °C range. The current accuracy of the method is ±5 °C. Future work with platinum should permit the application of SHG thermometry to much higher surface temperatures.

© 1996 Optical Society of America

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