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Lasing on the D lines of sodium pumped by free→free transitions of Na-Xe collision pairs
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10.1063/1.4769456
/content/aip/journal/apl/101/24/10.1063/1.4769456
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/24/10.1063/1.4769456
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Figures

Image of FIG. 1.
FIG. 1.

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.

Image of FIG. 2.
FIG. 2.

(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).

Image of FIG. 3.
FIG. 3.

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).

Image of FIG. 4.
FIG. 4.

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.

Image of FIG. 5.
FIG. 5.

(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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/content/aip/journal/apl/101/24/10.1063/1.4769456
2012-12-11
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Lasing on the D lines of sodium pumped by free→free transitions of Na-Xe collision pairs
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/24/10.1063/1.4769456
10.1063/1.4769456
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