Calibration-free wavelength-modulation spectroscopy for measurements of gas temperature and concentration in harsh environments
We present a practical implementation of calibration-free wavelength-modulation
spectroscopy with second harmonic detection (WMS-2f) for measurements of gas …
spectroscopy with second harmonic detection (WMS-2f) for measurements of gas …
Optical interferometer-based methods for photoacoustic gas sensing: a review
S Wang, M Hoffmann, AK Yetisen, K Wang… - Applied Spectroscopy …, 2024 - Taylor & Francis
The detection of gas concentrations in harsh environments with high performance is an
emerging research area. Ensuring that external factors do not affect the detection and that it …
emerging research area. Ensuring that external factors do not affect the detection and that it …
VCSEL-based, high-speed, in situ TDLAS for in-cylinder water vapor measurements in IC engines
We report the first application of a vertical-cavity surface-emitting laser (VCSEL) for
calibration-and sampling-free, high-speed, in situ H_2O concentration measurements in IC …
calibration-and sampling-free, high-speed, in situ H_2O concentration measurements in IC …
Absolute validation of a diode laser hygrometer via intercomparison with the German national primary water vapor standard
B Buchholz, N Böse, V Ebert - Applied Physics B, 2014 - Springer
Direct tunable diode laser absorption spectroscopy (dTDLAS) is a powerful diagnostic
technique for absolute and accurate gas analysis with highest chemical specificity. Due to its …
technique for absolute and accurate gas analysis with highest chemical specificity. Due to its …
Simulation-based comparison of noise effects in wavelength modulation spectroscopy and direct absorption TDLAS
B Lins, P Zinn, R Engelbrecht, B Schmauss - Applied Physics B, 2010 - Springer
A simulative investigation of noise effects in wavelength modulation spectroscopy (WMS)
and direct absorption diode laser absorption spectroscopy is presented. Special attention is …
and direct absorption diode laser absorption spectroscopy is presented. Special attention is …
Novel laser crystal Nd3+: Ca (Y, Gd) AlO4: A promising candidate for laser operation beyond 1.37 µm
X Niu, H Chen, P Zhang, H Yin, Y Hang, Z Li… - Journal of Alloys and …, 2023 - Elsevier
A novel laser crystal Nd: CaGd 0.1 Y 0.9 AlO 4 (Nd 3+: Ca (Y, Gd) AlO 4) crystal has been
successfully grown by Czochralski (CZ) method. With the introduction of Gd 3+ ions, this …
successfully grown by Czochralski (CZ) method. With the introduction of Gd 3+ ions, this …
Characterization of temperature non-uniformity over a premixed CH4–air flame based on line-of-sight TDLAS
A novel technique for characterizing temperature non-uniformity has been investigated
based on measurements of line-of-sight tunable diode laser absorption spectroscopy. It …
based on measurements of line-of-sight tunable diode laser absorption spectroscopy. It …
High-speed tunable diode laser absorption spectroscopy for sampling-free in-cylinder water vapor concentration measurements in an optical IC engine
A novel, fiber-optic in situ laser hygrometer was developed to measure water vapor with
microsecond time resolution directly inside an internal combustion (IC) engine. The …
microsecond time resolution directly inside an internal combustion (IC) engine. The …
Validation of an extractive, airborne, compact TDL spectrometer for atmospheric humidity sensing by blind intercomparison
Accuracy, precision, repeatability and long-term stability, are the most important
requirements to enable reliable airborne humidity measurements, which are needed for …
requirements to enable reliable airborne humidity measurements, which are needed for …
Towards traceability in CO2 line strength measurements by TDLAS at 2.7 µm
A Pogány, O Ott, O Werhahn, V Ebert - Journal of Quantitative Spectroscopy …, 2013 - Elsevier
Direct tunable diode laser absorption spectroscopy (TDLAS) was combined in this study with
metrological principles on the determination of uncertainties to measure the line strengths of …
metrological principles on the determination of uncertainties to measure the line strengths of …