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

Abstract:
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 2 × 1012 cm-3 with a signal to noise ratio of 30:1.
Publication status:
Published

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Publisher copy:
10.1007/s003400200810

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Institution:
University of Oxford
Department:
Oxford, MPLS, Chemistry, Physical and Theoretical Chem
Role:
Author
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Journal:
APPLIED PHYSICS B-LASERS AND OPTICS
Volume:
74
Issue:
4-5
Pages:
441-444
Publication date:
2002-04-05
DOI:
EISSN:
1432-0649
ISSN:
0946-2171
URN:
uuid:4ce0820a-9a9f-4db6-bfe4-879dce898d93
Source identifiers:
38254
Local pid:
pubs:38254
Language:
English

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