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Spatially resolved infrared absorption measurements: application of an optical Stark effect

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Abstract

A new technique for obtaining point measurements in gases by infrared absorption is described. The method is based on a recently discovered quadratic Stark effect on vibrational and rotational molecular transitions that is induced by high-intensity optical fields. Detectivity calculations for CO, an important combustion gas, are presented together with a proof-of-principle demonstration of Stark-induced absorption in ammonia.

© 1981 Optical Society of America

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