Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • 2017 European Conference on Lasers and Electro-Optics and European Quantum Electronics Conference
  • (Optica Publishing Group, 2017),
  • paper CH_P_27

Photothermal detection of NO molecules using a 5.2 μm Quantum Cascade Laser and a simple fiber-based interferometer

Not Accessible

Your library or personal account may give you access

Abstract

We present a first demonstration of photo-thermal detection of NO gas particles in a configuration using a 5.2 μm QCL as an excitation source and a simple fiber interferometer for probing the induced refractive index changes. The photo-thermal approach to laser gas spectroscopy is to a certain degree similar to the photo-acoustic technique [2]. Photo-thermal effect can be observed after exciting gas molecules with a radiation source. The process of relaxation to the ground state, either through emission of photons, or by means of non-radiative processes, results in a local temperature increase in the sampled gas and, subsequently, in the change of the gas refractive index. Detecting these refractive index changes can be used to retrieve the information on the target analyte concentration. The proposed sensing approach offers significant flexibility while designing the sensor, due to the fact that the excitation and the probing laser source can be chosen independently, to exploit their particular advantages. The system setup used to detect NO gas particles is presented in Fig. 1.

© 2017 IEEE

PDF Article
More Like This
Detection of Nitric Oxide at 5.26 µm using antiresonant hollow core fiber-assisted photothermal interferometry

Karol Krzempek, Paweł Kozioł, Piotr Jaworski, Grzegorz Dudzik, Viktoria Hoppe, and Walter Belardi
JW2A.17 Applied Industrial Spectroscopy (AIS) 2021

Terahertz s-SNOM with > λ/1000 resolution based on self-mixing in quantum cascade lasers

Binbin Wei, Robert Wallis, Stephen Kindness, Oleg Mitrofanov, Harvey E. Beere, David A. Ritchie, and Riccardo Degl’Innocenti
CC_4_2 The European Conference on Lasers and Electro-Optics (CLEO/Europe) 2017

Antiresonant hollow core fiber-based photothermal interferometry of Nitric Oxide at 5.26 µm with parts-per-billion sensitivity

Karol Krzempek, Piotr Jaworski, Piotr Bojęś, Paweł Kozioł, Grzegorz Dudzik, Viktoria Hoppe, and Walter Belardi
SF3F.7 CLEO: Science and Innovations (CLEO:S&I) 2022

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved