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  • Vol. 19, Iss. 14 — Jul. 15, 1994
  • pp: 1091–1093

Dual diode-laser fiber-optic diagnostic for water-vapor measurements

M. Pilar Arroyo, Timothy P. Birbeck, Douglas S. Baer, and Ronald K. Hanson  »View Author Affiliations


Optics Letters, Vol. 19, Issue 14, pp. 1091-1093 (1994)
http://dx.doi.org/10.1364/OL.19.001091


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Abstract

We present a novel diode-laser diagnostic for water-vapor measurements based on absorption spectroscopy. Two InGaAsP diode lasers were used to record H2O absorption line shapes near 1395 nm at a 3-kHz repetition rate along a single path through a water-vapor flow field generated in a shock tube. The use of two lasers permits simultaneous line-shape measurements in different spectral regions and facilitates the selection of appropriate line pairs for thermometry. The wavelength tuning rate was determined by use of a fiber-optic device known as a ring interferometer. Flow-field conditions (1320 K, 0.3 atm) inferred from measured line shapes compared favorably with calculated values.

© 1994 Optical Society of America

History
Original Manuscript: February 23, 1994
Published: July 15, 1994

Citation
M. Pilar Arroyo, Timothy P. Birbeck, Douglas S. Baer, and Ronald K. Hanson, "Dual diode-laser fiber-optic diagnostic for water-vapor measurements," Opt. Lett. 19, 1091-1093 (1994)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-19-14-1091


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References

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