Gaseous Oxygen Detection Using Hollow-Core Fiber-Based Linear Cavity Ring-Down Spectroscopy
- We demonstrate a method for the calibration-free and quantitative analysis of small volumes of gaseous samples. A 10 m hollow-core photonic bandgap fiber is used as the sample cell (volume = 0.44 mu L) and is placed inside a linear resonator setup. The application of cavity ring-down spectroscopy and in consideration of rather small coupling losses, this leads to an increased effective optical path length of up to 70 m. This implies a volume per optical interaction path length of 6.3 nL.m(-1). We used tunable diode laser spectroscopy at 760 nm and scanned the absorption for oxygen sensing. The optical loss due to sample absorption is obtained by measuring the ring-down time of light propagating inside the cavity. The resultant absorption coefficient shows a discrepancy of only 5.1% comparing to the HITRAN database. This approach is applicable for sensitive measurements if only submicroliter sample volumes are available.
Author details: | Dorit Munzke, Michael Böhm, Oliver ReichORCiDGND |
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DOI: | https://doi.org/10.1109/JLT.2015.2397177 |
ISSN: | 0733-8724 |
ISSN: | 1558-2213 |
Title of parent work (English): | Journal of lightwave technology |
Publisher: | Inst. of Electr. and Electronics Engineers |
Place of publishing: | Piscataway |
Publication type: | Article |
Language: | English |
Year of first publication: | 2015 |
Publication year: | 2015 |
Release date: | 2017/03/27 |
Tag: | Cavity ring-down spectroscopy; gas sensing; hollow-core photonic bandgap fiber; oxygen |
Volume: | 33 |
Issue: | 12 |
Number of pages: | 6 |
First page: | 2524 |
Last Page: | 2529 |
Funding institution: | German Federal Ministry for Education and Research [03Z2AN12] |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
Peer review: | Referiert |