PCF-Based Cavity Enhanced Spectroscopic Sensors for Simultaneous Multicomponent Trace Gas Analysis
| Autor: | Kamil Stelmaszczyk, Walter M. Nakaema, Philipp Rohwetter, Zuoqiang Hao, Ludger Wöste |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Optics and Photonics
Optical Phenomena Absorption spectroscopy 07.60.Rd Physics::Optics cavity ring-down absorption spectroscopy PACS 07.07.Df Review lcsh:Chemical technology Biochemistry Absorption Analytical Chemistry Cavity ring-down spectroscopy Optics lcsh:TP1-1185 Electrical and Electronic Engineering cavity-enhanced absorption spectroscopy Instrumentation Spectrograph 42.55.Tv Chemistry business.industry Spectrum Analysis supercontinuum lasers 33.20.Kf Water 37.30.+i 42.79.Gn Atomic and Molecular Physics and Optics Trace gas Supercontinuum 07.57.Ty 07.88.+y Optical phenomena Wavelength molecular spectroscopy Optoelectronics Gases photonic crystal fibres Crystallization business Water vapor |
| Zdroj: | Sensors (Basel, Switzerland) Sensors, Vol 11, Iss 2, Pp 1620-1640 (2011) |
| ISSN: | 1424-8220 |
| DOI: | 10.3390/s110201620 |
| Popis: | A multiwavelength, multicomponent CRDS gas sensor operating on the basis of a compact photonic crystal fibre supercontinuum light source has been constructed. It features a simple design encompassing one radiation source, one cavity and one detection unit (a spectrograph with a fitted ICCD camera) that are common for all wavelengths. Multicomponent detection capability of the device is demonstrated by simultaneous measurements of the absorption spectra of molecular oxygen (spin-forbidden b-X branch) and water vapor (polyads 4v, 4v + d) in ambient atmospheric air. Issues related to multimodal cavity excitation, as well as to obtaining the best signal-to-noise ratio are discussed together with methods for their practical resolution based on operating the cavity in a “quasi continuum” mode and setting long camera gate widths, respectively. A comprehensive review of multiwavelength CRDS techniques is also given. |
| Databáze: | OpenAIRE |
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