Abstract

A detection system for measuring HCl in the gas phase by monitoring sensitized fluorescence following intracavity excitation by a HCl chemical laser is described. It is possible to make measurements every few seconds. The laboratory results demonstrate that the baseline noise in dry air corresponds to 2 parts in 109 of HCl. The system has been calibrated and shown to have a linear response in the range 28 parts in 109 − 2.6 parts in 106 of HCl.

© 1986 Optical Society of America

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