Highly sensitive and rugged gas optical detection via interferometric cavity-assisted photothermal spectroscopy

Pinto, Davide; Waclawek, Johannes Paul; Lindner, Stefan; Moser, Harald; Ricchiuti, Giovanna; Lendl, Bernhard

doi:10.1117/12.2648273

Record link:

http://hdl.handle.net/20.500.12708/192040

Title:

Highly sensitive and rugged gas optical detection via interferometric cavity-assisted photothermal spectroscopy

Citation:

Pinto, D., Waclawek, J. P., Lindner, S., Moser, H., Ricchiuti, G., & Lendl, B. (2023). Highly sensitive and rugged gas optical detection via interferometric cavity-assisted photothermal spectroscopy. In L. E. Busse & Y. Soskind (Eds.), Photonic Instrumentation Engineering X. https://doi.org/10.1117/12.2648273

Publisher DOI:

10.1117/12.2648273

Publication Type:

Inproceedings - Full-Paper Contribution

Language:

English

Authors:

Pinto, Davide
Waclawek, Johannes Paul
Lindner, Stefan
Moser, Harald
Ricchiuti, Giovanna
Lendl, Bernhard

Organisational Unit:

E164-02-1 - Forschungsgruppe Prozessanalytik

Published in:

Photonic Instrumentation Engineering X

ISBN:

9781510659629

Volume:

12428

Date (published):

2023

Event name:

Photonics West 2023

Event date:

28-Jan-2023 - 2-Feb-2023

Event place:

San Francisco, CA, United States of America (the)

Number of Pages:

Peer reviewed:

Yes

Keywords:

Fabry-Perot interferometry; Gas sensing; Nitric Oxide; Photothermal spectroscopy; Quantum Cascade Laser

Abstract:

We report on the detection of nitric oxide using an Interferometric Cavity-Assisted Photothermal Spectroscopy (ICAPS) gas sensor in combination with a DFB-QCL emitting at 1900 cm-1 as excitation source. In ICAPS, a probe laser is coupled to a Fabry-Perot interferometer acting as an optical transducer of thermal effects. A wavelength modulation approach of the probe diode laser was employed, to actively lock its wavelength to the point of highest sensitivity and linearity of the interferometric fringe for a stable readout. A normalized noise equivalent absorption of 5·10-6 Wcm-1Hz-1/2 was achieved corresponding to 1.4 ppm of NO.

Project (external):

OPTAPHI

Project ID:

860808

Research Areas:

Materials Characterization: 50%
Photonics: 50%

Science Branch:

1040 - Chemie: 100%

Appears in Collections:

Conference Paper