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Mid-Infrared Laser Based Sensors
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Mid-Infrared Laser Based Sensors

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Physical Sensors".

Deadline for manuscript submissions: closed (25 November 2022) | Viewed by 8940

Special Issue Editors

Dr. Alex Fuerbach

E-Mail Website
Guest Editor
Department of Physics and Astronomy, MQ Photonics Research Centre, Macquarie University, Sydney, Australia
Interests: mid-infrared lasers; fibre lasers; ultrafast optics; nonlinear optics; femtosecond laser fabrication
Special Issues, Collections and Topics in MDPI journals
Dr. Gayathri Bharathan

E-Mail Website
Guest Editor
Photonic Systems Laboratory, Swiss Federal Institute of Technology, Lausanne, Switzerland
Interests: photonics; fiber Bragg gratings; mid-IR lasers; fiber lasers; ultrafast lasers; femtosecond laser inscriptions

Special Issue Information

Dear Colleagues,

The mid-infrared (mid-IR) region of the electromagnetic spectrum (2–20 μm) has long attracted much scientific and technological interest due to the fact that virtually all molecules have their rotational-vibrational absorption lines in this wavelength range. For this reason, the mid-IR is often referred to as the “molecular fingerprint” region. Owing to the high-impact applications that result from the strong molecule–photon interaction, such as trace molecular detection for airport security screening and non-invasive breath analysis, research into sensor systems that are based on mid-IR lasers and photonics has become one of the hottest topics in modern optics research.

This forthcoming Special Issue invites manuscripts that cover various aspects of mid-infrared laser-based sensor systems. This not only includes research into sensing applications such as molecular fingerprinting, but also research into the development of novel light sources for the mid-infrared range such as mid-IR fibre lasers and mid-IR supercontinuum generation.

Both reviews and original research articles are welcome.

If you have additional suggestions or questions that you would like to discuss before submitting your manuscript, please feel free to contact me. I look forward to an exciting Special Issue and appreciate your participation.

Dr. Alex Fuerbach
Dr. Gayathri Bharathan
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sensors is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Mid-infrared sensing
  • Molecular fingerprinting Trace-gas detection
  • Mid-infrared fibre lasers
  • Supercontinuum generation
  • Dual-comb spectroscopy
  • Differential absorption LIDAR
  • Mid-infrared frequency combs

Published Papers (2 papers)

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25 pages, 5797 KiB  
Article
Broadband Time-Resolved Absorption and Dispersion Spectroscopy of Methane and Ethane in a Plasma Using a Mid-Infrared Dual-Comb Spectrometer
by Muhammad Ali Abbas, Luuk van Dijk, Khalil Eslami Jahromi, Mohammadreza Nematollahi, Frans J. M. Harren and Amir Khodabakhsh
Sensors 2020, 20(23), 6831; https://0-doi-org.brum.beds.ac.uk/10.3390/s20236831 - 29 Nov 2020
Cited by 13 | Viewed by 4724
Abstract
Conventional mechanical Fourier Transform Spectrometers (FTS) can simultaneously measure absorption and dispersion spectra of gas-phase samples. However, they usually need very long measurement times to achieve time-resolved spectra with a good spectral and temporal resolution. Here, we present a mid-infrared dual-comb-based FTS in [...] Read more.
Conventional mechanical Fourier Transform Spectrometers (FTS) can simultaneously measure absorption and dispersion spectra of gas-phase samples. However, they usually need very long measurement times to achieve time-resolved spectra with a good spectral and temporal resolution. Here, we present a mid-infrared dual-comb-based FTS in an asymmetric configuration, providing broadband absorption and dispersion spectra with a spectral resolution of 5 GHz (0.18 nm at a wavelength of 3333 nm), a temporal resolution of 20 μs, a total wavelength coverage over 300 cm−1 and a total measurement time of ~70 s. We used the dual-comb spectrometer to monitor the reaction dynamics of methane and ethane in an electrical plasma discharge. We observed ethane/methane formation as a recombination reaction of hydrocarbon radicals in the discharge in various static and dynamic conditions. The results demonstrate a new analytical approach for measuring fast molecular absorption and dispersion changes and monitoring the fast dynamics of chemical reactions over a broad wavelength range, which can be interesting for chemical kinetic research, particularly for the combustion and plasma analysis community. Full article
(This article belongs to the Special Issue Mid-Infrared Laser Based Sensors)
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10 pages, 4419 KiB  
Letter
A NDIR Mid-Infrared Methane Sensor with a Compact Pentahedron Gas-Cell
by Weilin Ye, Zihan Tu, Xupeng Xiao, Alessandro Simeone, Jingwen Yan, Tao Wu, Fupei Wu, Chuantao Zheng and Frank K. Tittel
Sensors 2020, 20(19), 5461; https://0-doi-org.brum.beds.ac.uk/10.3390/s20195461 - 23 Sep 2020
Cited by 17 | Viewed by 3286
Abstract
In order to improve the performance of the large divergence angle mid-infrared source in gas sensing, this paper aims at developing a methane (CH4) sensor with non-dispersive infrared (NDIR) technology using a compact pentahedron gas-cell. A paraboloid concentrator, two biconvex lenses [...] Read more.
In order to improve the performance of the large divergence angle mid-infrared source in gas sensing, this paper aims at developing a methane (CH4) sensor with non-dispersive infrared (NDIR) technology using a compact pentahedron gas-cell. A paraboloid concentrator, two biconvex lenses and five planar mirrors were used to set up the pentahedron structure. The gas cell is endowed with a 170 mm optical path length with a volume of 19.8 mL. The mathematical model of the cross-section and the three-dimension spiral structure of the pentahedron gas-cell were established. The gas-cell was integrated with a mid-infrared light source and a detector as the optical part of the sensor. Concerning the electrical part, a STM32F429 was employed as a microcontroller to generate the driving signal for the IR source, and the signal from the detector was sampled by an analog-to-digital converter. A static volumetric method was employed for the experimental setup, and 20 different concentration CH4 samples were prepared to study the sensor’s evaluation, which revealed a 1σ detection limit of 2.96 parts-per-million (ppm) with a 43 s averaging time. Full article
(This article belongs to the Special Issue Mid-Infrared Laser Based Sensors)
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