Improving Water Quality and Security with Advanced Sensors and Indirect Water Sensing Methods

Cousin, Philippe; Moumtzidou, Anastasia; Karakostas, Anastasios; Gounaridis, Lefteris; Kouloumentas, Christos; Pereira, Mauro; Apostolakis, Apostolos; Gorrochategui, Paula; Aoust, Guillaume; Lebental, Bérengère

doi:10.1007/978-3-031-08262-7_11

Cited by 8 publications

(5 citation statements)

References 38 publications

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“…This tablet hosted the necessary software to establish communication with the aqua3S data collection platform and retrieve the data. Additionally, a complementary software was developed for the aqua3S project to generate a JSON file, which facilitates data communication with the aqua3S platform …”

Section: Methodsmentioning

confidence: 99%

“…Additionally, a complementary software was developed for the aqua3S project to generate a JSON file, which facilitates data communication with the aqua3S platform. 50 …”

Section: Methodsmentioning

confidence: 99%

“…Additionally, a complementary software was developed for the aqua3S project to generate a JSON file, which facilitates data communication with the aqua3S platform. 50 The gas mixture retrieved by the stripping process is considered an air mixture, as indicated in the previous section with a temperature ranging between 263 and 323 K and a typical pressure of 1 atm. Thus, the measurement gas cell within mSm is regulated at 333 K, well beyond the upper limit of 323 K, to make certain that the cell temperature will not drift due to an elevated temperature.…”

Section: ■ Introductionmentioning

confidence: 99%

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Photoacoustic Spectroscopy Using a Quantum Cascade Laser for Analysis of Ammonia in Water Solutions

Apostolakis,

Aoust,

Maisons

et al. 2024

ACS Omega

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Ammonia (NH 3 ) toxicity, stemming from nitrification, can adversely affect aquatic life and influence the taste and odor of drinking water. This underscores the necessity for highly responsive and accurate sensors to continuously monitor NH 3 levels in water, especially in complex environments, where reliable sensors have been lacking until this point. Herein, we detail the development of a sensor comprising a compact and selective analyzer with low gas consumption and a timely response based on photoacoustic spectroscopy. This, combined with an automated liquid sampling system, enables the precise detection of ammonia traces in water. The sensor system incorporates a state-of-the art quantum cascade laser as the excitation source emitting at 9 μm in resonance with the absorption line of NH 3 located at 1103.46 cm −1 . Our instrument demonstrated detection sensitivity at a low ppm level for the ammonia molecule with response times of less than 60 s. For the sampling system, an ammonia stripping solution was designed, resulting in a prompt full measurement cycle (6.35 min). A further evaluation of the sensor within a pilot study showed good reliability and agreement with the reference method for real water samples, confirming the potential of our NH 3 analyzer for water quality monitoring applications.

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Section: Methodsmentioning

confidence: 99%

“…Additionally, a complementary software was developed for the aqua3S project to generate a JSON file, which facilitates data communication with the aqua3S platform. 50 …”

Section: Methodsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Photoacoustic Spectroscopy Using a Quantum Cascade Laser for Analysis of Ammonia in Water Solutions

Apostolakis,

Aoust,

Maisons

et al. 2024

ACS Omega

Self Cite

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“…This approach overcomes the limitations of electronic integrated circuits that have reached their maximum integration capacity [2], [3], positioning it as the most promising technology for designing high-density integrated chips [4], [5]. Recently, the midinfrared (MIR) spectral region, extending beyond optical communication wavelengths, has garnered global research attention for its promising applications in diverse fields such as chemical and biological sensing, environmental monitoring, gas-trace detection, quantum photonics, lidar, CBRN detection, thermophotovoltaics and water quality monitoring applications [6]- [10]. The availability of efficient MIR Quantum Cascade Lasers (QCLs) sources, further fuels the interest in this range [11], [12].…”

Section: Introductionmentioning

confidence: 99%

A Novel Mid-Infrared Transverse Magnetic Mode Pass Periodic Waveguide Polarizer With Low Reflections

Zafar,

Pereira

2024

IEEE Access

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We propose a transverse magnetic (TM) pass polarizer based on a periodic waveguide on a silicon-on-insulator platform. The design is implemented on a 500nm-thick silicon layer surrounded by SiO 2 . The polarizer operates in the mid-infrared wavelength range of 3.1 µm to 3.6 µm, a crucial band for chemical and biological sensing, as well as environmental monitoring. While there is extensive documentation on polarizers in the near-infrared (NIR), there is a significant scarcity of research reports on polarizers in the mid-infrared (MIR). This proposed polarizer demonstrates outstanding performance, characterized by ultra-low loss for the transmitted TM mode, minimal reflections of the undesired transverse electric (TE) mode, and exceptionally high loss for the transmitted TE mode. The TM insertion loss remains below 0.5dB over a wavelength range of 3.2 µm to 3.6 µm, as the TM mode operates in the subwavelength and low-loss radiation regimes. The transmitted TE power is remarkably small, falling below -30dB over a 300nm wavelength range. This is attributed to the TE mode operating in the high-loss radiation regime and the bad gap region of the dispersion diagram. Furthermore, the reflected power of the undesired TE mode is significantly reduced (below -20dB) by incorporating the periodic waveguide in a directional coupler setup. The footprint of the polarizer is compact, measuring just 30 µm × 7 µm.

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“…Quantum cascade lasers (QCLs) are used in the mid-infrared and terahertz ranges, which are interesting due to the presence of intense vibrational and rotational absorption lines of many molecules, as well as two atmospheric transparency windows in regions 4-5 and 8-14 µm. Compactness and efficiency of QCLs determine the variety of their applications in medicine [1], environmental monitoring [2,3] and monitoring of technological processes [4,5,6]. Developments are also underway for the use of QCLs in biomedicine [7,8], defense and security [6,9], and secure free-space optical communication, primarily in the mid-IR atmospheric transparency windows [10,11,12].…”

Section: Introductionmentioning

confidence: 99%

High-power quantum cascade lasers for 8 μm spectral range

Dudelev,

Cherotchenko,

Vrubel

et al. 2024

Semiconductor Lasers and Laser Dynamics XI

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We present a study of high-power quantum-cascade lasers (QCL) for 8 μm spectral range with active regions of latticematched to InP substrate and strain-balanced designs. The use of the strained quantum well/barrier pairs made it possible to increase the energy barrier between the upper laser level and continuum by ~ 200 meV. Our experiments show that utilization of the strain-balanced design of the active region makes it possible to more than double the characteristic temperature T0 to 253 K from 125 K for the lattice-matched design. In pulsed mode, QCLs with strain-balanced active region demonstrated high efficiency of 12% and high output optical power of 21 W (over 10 W per facet). This is the highest value of the optical power demonstrated to date in 8 μm spectral region to the best of our knowledge.

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Improving Water Quality and Security with Advanced Sensors and Indirect Water Sensing Methods

Cited by 8 publications

References 38 publications

Photoacoustic Spectroscopy Using a Quantum Cascade Laser for Analysis of Ammonia in Water Solutions

Photoacoustic Spectroscopy Using a Quantum Cascade Laser for Analysis of Ammonia in Water Solutions

A Novel Mid-Infrared Transverse Magnetic Mode Pass Periodic Waveguide Polarizer With Low Reflections

High-power quantum cascade lasers for 8 μm spectral range

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