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Sensitive detection of acetylene absorption in the visible by using a stabilized AlGaAs diode laser

F. S. Pavone, F. Marin, M. Inguscio, K. Ernst, and G. Di Lonardo

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Abstract

Overtone transitions of C2H2 at ~789 nm are investigated by means of an AlGaAs laser operating in an external optical cavity configuration. Relative amplitude noise is of a few parts in 106 (ppm) and permits an absorption detection limit of 0.2 ppm/km. Self-broadening and air broadening is measured for two components of the observed band [P(11) at 12646.966 and R(5) at 12688.699 cm−1].

© 1993 Optical Society of America

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