Sensing of formaldehyde using a distributed feedback interband cascade laser emitting around 3493 nm

Stefan Lundqvist*, Pawel Kluczynski, Robert Weih, Michael von Edlinger, Lars Naehle, Marc Fischer, Adam Bauer, Sven Höfling, Johannes Koeth

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

75 Citations (Scopus)

Abstract

We have demonstrated sensing of formaldehyde (H2CO) using a room-temperature distributed feedback interband cascade laser (ICL) emitting around 3493 nm. The ICL has been characterized and proved to be very suitable for tunable laser spectroscopy (TLS). The H2CO TLS spectra were recorded in direct absorption mode and showed excellent agreement with the Pacific Northwest National Laboratory database. The measurements reported here were taken from a series of measurements of a mixture of H2CO in air obtained by vaporizing a solution also containing methanol and formic acid. We obtained a resolution limit better than 1 ppm x m assuming a relative absorption of 10(-3). (c) 2012 Optical Society of America

Original languageEnglish
Pages (from-to)6009-6013
Number of pages5
JournalApplied Optics
Volume51
Issue number25
Publication statusPublished - 1 Sept 2012

Keywords

  • SPECTROSCOPY

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