title: Sensing of formaldehyde using a distributed feedback interband cascade laser emitting around 3493 nm.
abstract: We have demonstrated sensing of formaldehyde (H(2)CO) 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 H(2)CO 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 H(2)CO in air obtained by vaporizing a solution also containing methanol and formic acid. We obtained a resolution limit better than 1 ppm × m assuming a relative absorption of 10(-3).
authors.affiliation: Airoptic Sp. z o.o., Janiny Omańkowskiej 58, 60–465 Poznań, Poland. Stefan.Lundqvist@airoptic.pl
authors.forename: Stefan
authors.initials: S
authors.lastname: Lundqvist
authors.forename: Pawel
authors.initials: P
authors.lastname: Kluczynski
authors.forename: Robert
authors.initials: R
authors.lastname: Weih
authors.forename: Michael
authors.initials: M
authors.lastname: von Edlinger
authors.forename: Lars
authors.initials: L
authors.lastname: Nähle
authors.forename: Marc
authors.initials: M
authors.lastname: Fischer
authors.forename: Adam
authors.initials: A
authors.lastname: Bauer
authors.forename: Sven
authors.initials: S
authors.lastname: Höfling
authors.forename: Johannes
authors.initials: J
authors.lastname: Koeth