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Representative laser spectrum obtained with a 0.67 m Czerny-Turner monochromator having a resolution in first order of ∼60 GHz. These data were acquired with the dye (pump) laser wavelength fixed at 560 nm. The dye laser pulse energy and oven temperature were held constant at 15 mJ and 623 K, respectively. An expanded view of multiple scans of the D2 laser line with the 0.67 m monochromator is shown by the inset. The measured full-width of the spectrum (58 GHz) is instrument limited.
(a) Interferogram of the D2 laser, produced by a Fabry-Perot étalon (FSR = 1 cm−1 and F ≈ 20) and recorded with a telescope and a CCD camera; (b) intensity lineout of the interference pattern in (a).
Pump and Na laser pulse waveforms recorded for [Na] = 5.4·1014 cm−3 (T = 593 K) and [Xe] = 1.6·1019 cm−3. The pump wavelength was 560 nm and the width of the pump and Na laser pulses are 6.3 ns and 2.7 ns (FWHM).
Variation of Na D-line laser intensity with the pump laser pulse energy (Ep). Data are given for two temperatures (593 K and 623 K) which correspond to Na number densities of 5.4·1014 cm−3 and 1.4·1015 cm−3, respectively. The pump wavelength and Xe density were 560 nm and 1.6·1019 cm−3, respectively. The solid line is the linear least-squares fit to the Ep < 13 mJ data for [Na] = 5.4·1014 cm−3.
(a) Excitation spectrum for the Na D-line laser, acquired by monitoring the peak intensity of the 589.0 nm, 589.6 nm laser as the wavelength of the pump laser was scanned from ∼557.8 to 564.5 nm; (b) Absorption spectrum associated with the blue satellite of the Na D2 line in Na-Xe mixtures. The ordinate represents the reduced absorption coefficient k, expressed in units of cm5 (data from Ref. 21).
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