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Rozprawy doktorskie na temat "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.
Pełny tekst źródłaSensitive 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
Książki na temat "InAs/AlSb LCQ"
Scholz, Susanne, i Daniel Dornhofer, red. Spectatorship in the Elizabethan Court. Klostermann, 2013. http://dx.doi.org/10.5771/9783465141853.
Pełny tekst źródłaCzęści książek na temat "InAs/AlSb LCQ"
"Why Pachacamac? When Pachacamac?" W Unveiling Pachacamac, redaktorzy Lawrence S. Owens, Peter Eeckhout, GIANCARLO MARCONE i GIANCARLO MARCONE, 181–226. University Press of Florida, 2022. http://dx.doi.org/10.5744/florida/9780813069333.003.0008.
Pełny tekst źródłaStreszczenia konferencji na temat "InAs/AlSb LCQ"
Vilčeková, Silvia, Katarína Harčárová, Andrea Moňoková i Eva Krídlová Burdová. "LIFE CYCLE ASSESSMENT AND SHORT-TERM MEASUREMENTS OF INDOOR ENVIRONMENTAL QUALITY OF A WOODEN FAMILY HOUSE". W 11th International Conference “Environmental Engineering”. VGTU Technika, 2020. http://dx.doi.org/10.3846/enviro.2020.643.
Pełny tekst źródłaBashir, I. A., S. Inam, M. Sana-ul-Hussnain, I. Shafee, M. Aijaz, R. Ullah, M. Haider i in. "Erosion Mitigation During Testing of High Deliverability Gas Well - A Case Study". W International Petroleum Technology Conference. IPTC, 2024. http://dx.doi.org/10.2523/iptc-23511-ms.
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