2.5.6 Photoacoustic Methane Detection using a novel DFB-type Diode Laser at 3.3 μm
- Event
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
Nürnberg/Nuremberg, Germany - Chapter
- 2.5 IR and Raman-based Sensors
- Author(s)
- S. Rhein, H. Bruhns, M. Wolff - Institute for Physical Sensors, Hamburg University of Applied Sciences (Germany), M. Fischer, J. Koeth, L. Nähle - nanoplus Nanosystems and Technologies GmbH (Germany)
- Pages
- 244 - 246
- DOI
- 10.5162/IMCS2012/2.5.6
- ISBN
- 978-3-9813484-2-2
- Price
- free
Abstract
To the best of our knowledge, we present for the first time spectroscopic methane measurements with a DFBtype laser diode at a wavelength of approximately3.3 μm. The laser diode can be operated near room temperature andemits a maximum of1.5 mW optical power with a spectral linewidth smaller than 10 MHz.This novel kind of semiconductor laser allowed performing precise photoacoustic measurements of characteristical methane absorption structures in the v3 band. In addition, the setup enables high detection sensitivity with a limit in the ppb range.