학술논문
Measurements of CO in a multipass cell and in a hollow-core photonic bandgap fiber at 2 μm.
Document Type
Article
Author
Source
Subject
*CARBON monoxide
*PHOTONIC band gap structures
*FIBERS
*WAVELENGTHS
*LASER spectroscopy
*DIODES
*GAS mixtures
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Language
ISSN
0946-2171
Abstract
Recently, hollow-core photonic bandgap fibers (HC-PBFs) for use in the 2 μm wavelength region have become available. We have employed tunable diode laser absorption spectroscopy (TDLAS) to quantify CO in nitrogen, injected into a HC-PBF. Our spectrometer contains both an HC-PBF-based absorption cell and an astigmatic Herriott multipass gas cell. The Herriott cell was used for comparison with the HC-PBF cell. The HC-PBF cell's sensitivity and limit of detection were calculated to be 3.5×10 cm⋅Hz and 59 ppm⋅m, respectively. To substantiate the spectrometer performance, a measurement was done in the Herriott cell probing a reference gas mixture with nominal 400 μmol/mol CO in N. The spectrometric results were in good agreement with the reference value. The relative standard uncertainty of the spectrometric result was found to be at the ±2 % level. [ABSTRACT FROM AUTHOR]