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Fixed-wavelength H2O absorption spectroscopy system enhanced by an on-board external-cavity diode laser.
- Source :
- Measurement Science & Technology; Mar2016, Vol. 27 Issue 3, p1-1, 1p
- Publication Year :
- 2016
-
Abstract
- We describe a system designed to perform fixed-wavelength absorption spectroscopy of H<subscript>2</subscript>O vapor in practical combustion devices. The system includes seven wavelength-stabilized distributed feedback (WSDFB) lasers, each with a spectral accuracy of ±1 MHz. An on-board external cavity diode laser (ECDL) that tunes 1320–1365 nm extends the capabilities of the system. Five system operation modes are described. In one mode, a sweep of the ECDL is used to monitor each WSDFB laser wavelength with an accuracy of ±30 MHz. Demonstrations of fixed-wavelength thermometry at 10 kHz bandwidth in near-room-temperature gases are presented; one test reveals a temperature measurement error of ~0.43%. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09570233
- Volume :
- 27
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Measurement Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 112872194
- Full Text :
- https://doi.org/10.1088/0957-0233/27/3/035501