Work

Frequency-comb infrared spectrometer for rapid, remote chemical sensing

Year: 2005

Type: article

Abstract: We demonstrate real-time recording of chemical vapor fluc-tuations from 22m away with a fast Fourier-transform infrared (FTIR) spectrometer that uses a laser-like infrared probing beam generated from two 10-fs Ti:sapphire lasers. The FTIR's broad 9-12 microm spectrum in the "molecular fingerprint" region is dispersed by fast heterodyne self-scanning, enabling spectra at 2cm-1 resolution to be recorded in 70 micros snapshots. We achieve continuous acquisition at a rate of 950 IR spectra per second by actively manipulating the repetition rate of one laser. Potential applications include video-rate chemical imaging and transient spectroscopy of e.g. gas plumes, flames and plasmas, and generally non-repetitive phenomena such as those found in protein folding dynamics and pulsed magnetic fields research.

Source: Optics Express

DOI: 10.1364/opex.13.009029

Authors: Albert Schliesser, Markus Brehm, Fritz Keilmann, Daniel W. van der Weide

Institutions: Max Planck Institute of Biochemistry, University of Wisconsin–Madison

Language: English

Topic: Spectroscopy and Laser Applications

Subfield: Spectroscopy

Field: Chemistry

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funders: Deutsche Forschungsgemeinschaft, U.S. Air Force, Air Force Office of Scientific Research