A Miniaturized UV-LED Based Optical Gas Sensor Utilizing Silica Waveguides for the Measurement of Nitrogen Dioxide and Sulphur Dioxide
| Autor: | Martin Schreivogel, Philipp Elmlinger, Simon Weida, Michael Kneissl |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
absorption spectroscopy
Optical fiber Materials science Absorption spectroscopy lcsh:A waveguide medicine.disease_cause gas sensor law.invention Optics law Etching (microfabrication) medicine ddc:535 glass Diode laser processing business.industry LED UV Wavelength Optoelectronics lcsh:General Works business Waveguide Ultraviolet Light-emitting diode |
| Zdroj: | Proceedings, Vol 1, Iss 4, p 556 (2017) |
| Popis: | Continuing advances in the development of light-emitting diodes (LEDs) in the deep ultraviolet spectral range (DUV) enable miniaturized, mobile, and cost-effective DUV gas sensors. Efficient light coupling, guiding, and splitting plays a key role for stable sensor systems and is realized by lowloss silica based waveguides, fabricated by ultrashort pulsed laser etching and laser polishing. The tapered waveguide leads to a significantly higher efficiency with less required space compared to optical fibers or free beam setups, respectively. Toxic gases like NO2 and SO2 were successfully measured down to 1 ppm utilizing LEDs with wavelengths of 395 nm and 280 nm. |
| Databáze: | OpenAIRE |
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