A versatile and integrated tunable diode laser system for high precision measurements of the important sulfur gas carbonyl sulfide is described. We explicitly address some of the major factors affecting tunable diode laser measurement precision as well as accuracy and have implemented a number of new features for increased system control and versatility. The system described herein provides the capability for measuring ambient concentrations of this gas with a precision in the range from ±0.3 to ±1% over time periods of many hours. Such a precision provides us with an important new capability for measuring true spatial and temporal variations of carbonyl sulfide in the atmosphere.
© 1991 Optical Society of America
Original Manuscript: June 1, 1990
Published: May 20, 1991
Alan Fried, James R. Drummond, Bruce Henry, and Jack Fox, "Versatile integrated tunable diode laser system for high precision: application for ambient measurements of OCS," Appl. Opt. 30, 1916-1932 (1991)