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Proceedings Paper

Upconversion enhanced degenerate four-wave mixing in the mid-infrared for sensitive detection of acetylene in gas flows
Author(s): Lasse Høgstedt; Jeppe Seidelin Dam; Anna-Lena Sahlberg; Zhongshan Li; Marcus Aldén; Christian Pedersen; Peter Tidemand-Lichtenberg
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Paper Abstract

We present a new background free method for in situ gas detection that combines degenerate four-wave mixing with an infra-red light detector based on parametric frequency upconversion of infra-red light. The system is demonstrated at mid infrared wavelengths for low concentration measurements of acetylene diluted in a N2 gas flow at ambient conditions. It is demonstrated that the system is able to cover more than 100 nm in scanning range and detect concentrations as low as 3 ppm based on the R9e line. A major issue in small signal measurements is scattered light and it is showed how a spatial analysis can be used to reduce this level.

Paper Details

Date Published: 20 February 2014
PDF: 6 pages
Proc. SPIE 8964, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XIII, 89641H (20 February 2014); doi: 10.1117/12.2039243
Show Author Affiliations
Lasse Høgstedt, Technical Univ. of Denmark (Denmark)
Jeppe Seidelin Dam, Technical Univ. of Denmark (Denmark)
Anna-Lena Sahlberg, Lund Univ. (Sweden)
Zhongshan Li, Lund Univ. (Sweden)
Marcus Aldén, Lund Univ. (Sweden)
Christian Pedersen, Technical Univ. of Denmark (Denmark)
Peter Tidemand-Lichtenberg, Technical Univ. of Denmark (Denmark)

Published in SPIE Proceedings Vol. 8964:
Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XIII
Konstantin L. Vodopyanov, Editor(s)

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