Upconversion enhanced degenerate four-wave mixing in the mid-infrared for sensitive detection of acetylene in gas flows

Lasse Høgstedt, Jeppe Seidelin Dam, Anna-Lena Sahlberg, Zhongshan Li, Marcus Alden, Christian Pedersen, Peter Tidemand-Lichtenberg

Research output: Contribution to journalConference articleResearchpeer-review

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.
Original languageEnglish
Article number89641H
JournalProceedings of SPIE, the International Society for Optical Engineering
Volume8964
Number of pages6
ISSN0277-786X
DOIs
Publication statusPublished - 2014
EventSPIE Photonics West : Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XIII - San Francisco, California, United States
Duration: 1 Feb 20146 Feb 2014

Conference

ConferenceSPIE Photonics West : Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XIII
CountryUnited States
CitySan Francisco, California
Period01/02/201406/02/2014

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