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Abstract: Stratospheric N[O.SUB.2] and [O.sub.3] retrieved from measurements of limb-scattered sunlight made by the Optical Spectrograph and InfraRed Imager System (OSIRIS) are compared with like observations made by a ground-based [...]

A Fourier-transform spectrometer has been used in a step-scan mode to make time-resolved measurements of the evolving laser pulse in intracavity laser spectroscopy (ILS) experiments. Spectra of broadband dye laser pulses at approximately 615 nm were recorded at relatively high spectral (0.5-[cm.sup.-1]) and temporal (as high as 5-[[micro]seconds]) resolution. In the absence of an absorber, the height of the pulse is shown to be proportional to [[t.sub.g].sup.0.57] (where [t.sub.g] is the generation time) for generation times as high as 500 [[micro]seconds]. The system was constructed for feasibility studies of future use at infrared and near-infrared wavelengths where conventional ILS that uses diode arrays would be either expensive or simply not possible. The C[H.sub.4] overtone transition at 619.68 nm was used to test the linearity and sensitivity of the system. Comparable performance to conventional ILS systems was demonstrated, as were the advantages of the present system for studies of laser and absorption dynamics. Key words: Intracavity laser spectroscopy, step-scan Fourier-transform interferometry, time-resolved spectroscopy.

Kimberly Strong [*] A portable spectrometer system has been developed for performing stand-alone measurements of stratospheric ozone and other gases important in elucidating the science behind ozone depletion. The authors […]