Multi-mode absorption spectroscopy using a quantum cascade laser for simultaneous detection of NO and H
2O.
APPLIED PHYSICS. B, LASERS AND OPTICS 2016;
122:226. [PMID:
32355421 PMCID:
PMC7175658 DOI:
10.1007/s00340-016-6499-4]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Accepted: 07/19/2016] [Indexed: 06/11/2023]
Abstract
Detection of multiple transitions in NO and H2O using multi-mode absorption spectroscopy, MUMAS, with a quantum cascade laser, QCL, operating at 5.3 μm at scan rates up to 10 kHz is reported. The linewidth of longitudinal modes of the QCL is derived from pressure-dependent fits to experimental MUMAS data. Variations in the spectral structure of the broadband, multi-mode, output of the commercially available QCL employed are analysed to provide accurate fits of modelled MUMAS signatures to the experimental data.
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