Linked Life Data

20941085

Source:http://linkedlifedata.com/resource/pubmed/id/20941085

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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
21
pubmed:dateCreated
2010-10-13
pubmed:abstractText
We describe a continuous-wave diode laser spectrometer for water-vapour precision spectroscopy at 1.38 ?m. The spectrometer is based upon the use of a simple scheme for offset-frequency locking of a pair of extended-cavity diode lasers that allows to achieve unprecedented accuracy and reproducibility levels in measuring molecular absorption. When locked to the master laser with an offset frequency of 1.5 GHz, the slave laser exhibits residual frequency fluctuations of 1 kHz over a time interval of 25 minutes, for a 1-s integration time. The slave laser could be continuously tuned up to 3 GHz, the scan showing relative deviations from linearity below the 10{-6} level. Simultaneously, a capture range of the order of 1 GHz was obtained. Quantitative spectroscopy was also demonstrated by accurately determining relevant spectroscopic parameters for the 22,1?22,0line of the H2(18)O v1+v3 band at 1384.6008 nm.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
1094-4087
pubmed:author
pubmed:issnType
Electronic
pubmed:day
11
pubmed:volume
18
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
21851-60
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
Offset-frequency locking of extended-cavity diode lasers for precision spectroscopy of water at 1.38 ?m.
pubmed:affiliation
Dipartimento di Scienze Ambientali della Seconda Universit`a di Napoli, and CNISM - Unità Napoli 2, Via Vivaldi 43, 81100 Caserta, Italy.
pubmed:publicationType
Journal Article