Littérature scientifique sur le sujet « InAs/AlSb LCQ »
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Thèses sur le sujet "InAs/AlSb LCQ"
Kinjalk, Kumar. « Long Wavelength QCLs for BTEX and Propane detection through QEPAS ». Electronic Thesis or Diss., Université de Montpellier (2022-....), 2023. http://www.theses.fr/2023UMONS079.
Texte intégralSensitive and selective sensing of BTEX and Propane is of great interest for environmental, biomedical, and petrochemical applications. However, detecting these compounds poses unique challenges due to potential interferences, either among themselves or from other compounds. This issue can be resolved by using laser spectroscopy in the long-wavelength mid-infrared spectral region (13-15 µm), where they exhibit highly discriminating absorption features. Yet, this wavelength range is almost unexplored due to the lack of suitable sources. This thesis aims to bridge this gap by developing high-performing long-wavelength QCLs and leveraging QEPAS for ultra-sensitive and selective detection.A novel design is proposed to improve the performance of long-wavelength InAs-based QCLs, which allowed us to demonstrate a record-breaking low threshold current density of 0.6 kA/cm2 at 300 K. Additionally, a novel insulation technique using SOG is also proposed to improve device stability issues provoked by the alteration of properties of photoresist insulation (typically used for InAs-based QCLs) at elevated temperatures. Subsequently, single-frequency DFB QCLs with SMSR > 20 dB and optical output power in the mW range operating in the continuous wave regime are developed, targeting the absorption lines of these gasses. Using these DFBs, a sensing system based on QEPAS is developed, calibrated, and characterized for Toluene, Benzene, and Propane detection. Exceptionally low detection limits of 113 ppb, 3 ppb, and 3 ppm are achieved in a pure nitrogen matrix over a 10-second integration time. The system maintains selectivity and robustness, even in complex gas mixtures. Finally, a 13.71 µm QCL is successfully coupled with a HCW, where optimal coupling conditions, beam quality, and loss are explored. The study confirms the efficient transmission of such wavelength through HCW with minimal loss and improved spatial beam quality
Livres sur le sujet "InAs/AlSb LCQ"
Scholz, Susanne, et Daniel Dornhofer, dir. Spectatorship in the Elizabethan Court. Klostermann, 2013. http://dx.doi.org/10.5771/9783465141853.
Texte intégralChapitres de livres sur le sujet "InAs/AlSb LCQ"
« Why Pachacamac ? When Pachacamac ? » Dans Unveiling Pachacamac, sous la direction de Lawrence S. Owens, Peter Eeckhout, GIANCARLO MARCONE et GIANCARLO MARCONE, 181–226. University Press of Florida, 2022. http://dx.doi.org/10.5744/florida/9780813069333.003.0008.
Texte intégralActes de conférences sur le sujet "InAs/AlSb LCQ"
Vilčeková, Silvia, Katarína Harčárová, Andrea Moňoková et Eva Krídlová Burdová. « LIFE CYCLE ASSESSMENT AND SHORT-TERM MEASUREMENTS OF INDOOR ENVIRONMENTAL QUALITY OF A WOODEN FAMILY HOUSE ». Dans 11th International Conference “Environmental Engineering”. VGTU Technika, 2020. http://dx.doi.org/10.3846/enviro.2020.643.
Texte intégralBashir, I. A., S. Inam, M. Sana-ul-Hussnain, I. Shafee, M. Aijaz, R. Ullah, M. Haider et al. « Erosion Mitigation During Testing of High Deliverability Gas Well - A Case Study ». Dans International Petroleum Technology Conference. IPTC, 2024. http://dx.doi.org/10.2523/iptc-23511-ms.
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