Direct measurement of O₂(a ¹Δ) and O₂(X ³Σ) in chemical oxygen–iodine lasers with use of spontaneous Raman imaging

Abstract

A spontaneous Raman imaging system (SRIS) has been developed that can monitor chemical oxygen–iodine laser (COIL) singlet oxygen generator (SOG) performance in real time. This system permits one to monitor directly the SOG performance by measuring O₂(a ¹Δ) and O₂(X ³Σ) simultaneously with a single intensified CCD array at the exit of an imaging monochromator. We present the results from tests conducted on a 0.25-mol SOG using a prototype Raman system. Performance and validation of a highly sensitive SRIS that was designed and built specifically for SOG diagnostics are discussed. Detection and possible interferences of other species relevant to COIL devices such as I₂ and Cl₂ are investigated.

© 1998 Optical Society of America

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