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Photonics
Special Issues
Mid-Infrared Quantum Cascade Lasers
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Mid-Infrared Quantum Cascade Lasers

A special issue of Photonics (ISSN 2304-6732). This special issue belongs to the section "New Applications Enabled by Photonics Technologies and Systems".

Deadline for manuscript submissions: closed (31 May 2022) | Viewed by 4414

Special Issue Editors

Dr. Emilia Pruszynska-Karbownik

E-Mail Website
Guest Editor
Institute of Physics, Lodz University of Technology, Lodz, Poland
Interests: quantum cascade lasers; laser beams; high-Q microcavities
Prof. Dr. Dayan Ban

E-Mail Website
Guest Editor
Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada
Interests: semiconductor quantum devices; optoelectronics; scanning probe microscopy; energy harvesting devices; terahertz and infrared photonics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The mid-infrared range (MIR) of the electromagnetic spectrum (2-15 μm) is crucial for a large number of applications such as telecommunication, molecular spectroscopy, medicine, and security. Since their first demonstration in 1994, quantum cascade lasers (QCLs) have become the most promising semiconductor sources of MIR radiation. QCL technology is quite mature, but it still faces unresolved issues.

With this Special Issue, we compile state-of-the-art research on mid-infrared QCLs. We are going to summarize the latest developments in theory, design, fabrication technology, measurement, and control techniques, and—last but not least—in QCL applications.

We look forward to your manuscripts (reviews as well as original research papers).

Dr. Emilia Pruszynska-Karbownik
Prof. Dr. Dayan Ban
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. Photonics is an international peer-reviewed open access monthly 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 2400 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

  • Quantum cascade lasers
  • Mid-infrared technology
  • Theory and design of QCLs
  • MIR beam engineering
  • Power scaling of QCLs
  • Mid-infrared photonic integrated circuits
  • QCL frequency combs
  • Distributed feedback (DFB) QCLs
  • External cavity QCLs
  • Applications for cascade lasers

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Published Papers (2 papers)

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Research

13 pages, 1996 KiB  
Article
CO2 Gas Temperature Sensing near Room Temperature by a Quantum Cascade Laser in Inter Pulse Mode
by Frank Herklotz, Tom Rubin, Theodore von Haimberger and Karsten Heyne
Photonics 2022, 9(7), 465; https://doi.org/10.3390/photonics9070465 - 2 Jul 2022
Viewed by 1533
Abstract
A non-invasive CO2 gas temperature sensing technique at or close to the room temperature range based on quantum cascade laser absorption spectroscopy is presented. The method probes thermally populated ground state and hot-band rotational-vibrational transitions of CO2 in the frequency range [...] Read more.
A non-invasive CO2 gas temperature sensing technique at or close to the room temperature range based on quantum cascade laser absorption spectroscopy is presented. The method probes thermally populated ground state and hot-band rotational-vibrational transitions of CO2 in the frequency range from 2349 to 2351 cm−1 from which the gas temperature is obtained from Boltzmann statistics. Transmission spectra are recorded by injection-current driven frequency-scans, the so-called inter pulse mode, of a pulsed distributed feedback quantum cascade laser. The statistical uncertainty (1σ) in temperature for single frequency scans with time resolution of 10 ms is 4 K and can be further reduced down to ∼50 mK by long-time averaging of about 1 min. The technique is evaluated with particular emphasis on implementation, data acquisition, data analysis and potential improvements. Full article
(This article belongs to the Special Issue Mid-Infrared Quantum Cascade Lasers)
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10 pages, 6876 KiB  
Communication
Competition between Entrainment Phenomenon and Chaos in a Quantum-Cascade Laser under Strong Optical Reinjection
by Olivier Spitz, Lauréline Durupt and Frédéric Grillot
Photonics 2022, 9(1), 29; https://doi.org/10.3390/photonics9010029 - 4 Jan 2022
Cited by 5 | Viewed by 2154
Abstract
The topic of external optical feedback in quantum-cascade lasers is relevant for stability and beam-properties considerations. Albeit less sensitive to external optical feedback than other lasers, quantum-cascade lasers can exhibit several behaviors under such feedback, and those are relevant for a large panel [...] Read more.
The topic of external optical feedback in quantum-cascade lasers is relevant for stability and beam-properties considerations. Albeit less sensitive to external optical feedback than other lasers, quantum-cascade lasers can exhibit several behaviors under such feedback, and those are relevant for a large panel of applications, from communication to ranging and sensing. This work focused on a packaged Fabry–Perot quantum-cascade laser under strong external optical feedback and shows the influence of the beam-splitter characteristics on the optical power properties of this commercially available laser. The packaged quantum-cascade laser showed extended conditions of operation when subject to strong optical feedback, and the maximum power that can be extracted from the external cavity was also increased. When adding a periodic electrical perturbation, various non-linear dynamics were observed, and this complements previous efforts about the entrainment phenomenon in monomode quantum-cascade lasers, with the view of optimizing private communication based on mid-infrared quantum-cascade lasers. Overall, this work is a step forward in understanding the behavior of the complex quantum-cascade-laser structure when it is subjected to external optical feedback. Full article
(This article belongs to the Special Issue Mid-Infrared Quantum Cascade Lasers)
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