Sum frequency generation at 309 nm using a violet and a near-IR DFB diode laser for detection of OH

We have used a violet diode laser at 404 nm and a distributed feedback diode laser at 1320 nm to produce 0.8 nW of radiation at 309 nm by sum frequency generation in beta-barium borate. The UV radiation was tuned mode-hop-free over 30 GHz and used to detect OH radicals produced in a microwave discha...

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Veröffentlicht in:	Applied physics. B, Lasers and optics Lasers and optics, 2002-04, Vol.74 (4-5), p.441-444
Hauptverfasser:	CORNER, L, GIBB, J. S, HANCOCK, G, HUTCHINSON, A, KASYUTICH, V. L, PEVERALL, R, RITCHIE, G. A. D
Format:	Artikel
Sprache:	eng
Schlagworte:	Absorption and scattering of radiation Borates Cutting Diode lasers Earth, ocean, space Exact sciences and technology External geophysics Feedback Frequency conversion harmonic generation, including high-order harmonic generation Fundamental areas of phenomenology (including applications) Lasers Microwave discharge Nonlinear optics Optics Physics Physics of the high neutral atmosphere Radicals Signal to noise ratio Spectral absorption by atmospheric gases
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Zusammenfassung:	We have used a violet diode laser at 404 nm and a distributed feedback diode laser at 1320 nm to produce 0.8 nW of radiation at 309 nm by sum frequency generation in beta-barium borate. The UV radiation was tuned mode-hop-free over 30 GHz and used to detect OH radicals produced in a microwave discharge. By chopping the UV light at 500 Hz, we observed a concentration of 2X10 cm with a signal to noise ratio of 30:1.
ISSN:	0946-2171 1432-0649
DOI:	10.1007/s003400200810