title: Long-path absorption measurement of CO(2) with a Raman-shifted tunable dye laser.
abstract: A laser long-path absorption system was developed with a hydrogen Raman shifter pumped by a tunable dye laser. The absorption spectrum of CO(2) in the 2-µm region was measured in the open air with a retroreflector or a hard target. The concentration of CO(2) was determined from the spectrum by the least-squares method. Noise in the system was analyzed, and the propagation of error to the obtained concentration was investigated. The statistical error in the concentration was estimated at approximately 1% for a single spectrum measurement. Comparison with the simultaneous measurements with a nondispersive infrared gas analyzer showed good agreement.
authors.forename: N
authors.initials: N
authors.lastname: Sugimoto
authors.forename: A
authors.initials: A
authors.lastname: Minato