iHWG-ICL: Methane Sensing with Substrate-Integrated Hollow Waveguides Directly Coupled to Interband Cascade Lasers
| Autor: | Erhan Tütüncü, Boris Mizaikoff, Peter Fuchs, Marc Fischer, Markus Nägele |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Fluid Flow and Transfer Processes
Absorption spectroscopy Chemistry business.industry Process Chemistry and Technology 010401 analytical chemistry Bioengineering 02 engineering and technology Interband cascade laser 021001 nanoscience & nanotechnology Laser 01 natural sciences Spectral line 0104 chemical sciences law.invention Wavelength Optics law Cascade Optoelectronics 0210 nano-technology business Absorption (electromagnetic radiation) Instrumentation Tunable laser |
| Zdroj: | ACS Sensors. 1:847-851 |
| ISSN: | 2379-3694 |
| DOI: | 10.1021/acssensors.6b00238 |
| Popis: | The development of a compact iHWG-ICL gas sensor combining innovative substrate-integrated hollow waveguides (iHWG) with mid-infrared emitting type-II interband cascade lasers (ICL) is presented. Hence, tunable laser absorption spectroscopy (TLAS) with iHWGs in direct absorption mode is enabled. Using a room-temperature distributed feedback (DFB) ICL emitting at approximately 3.366 μm, quantitative sensing of methane was demonstrated. Wavelength scanning was obtained via current tuning for monitoring an isolated line in the v3 fundamental band of CH4. The obtained spectra were compared to calculated spectra derived from the HITRAN2012 database. Furthermore, the performance of iHWGs simultaneously serving as miniaturized gas cell and as efficient optical waveguide at various absorption path lengths was tested and optimized. Calibration functions in the concentration range of 50 to 400 ppmv were established enabling limits of detection ranging from 6 to 28 ppmv. Hence, the combination of iHWGs with ICLs fac... |
| Databáze: | OpenAIRE |
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