[HTML][HTML] QCL-based frequency metrology from the mid-infrared to the THz range: a review
Quantum cascade lasers (QCLs) are becoming a key tool for plenty of applications, from the
mid-infrared (mid-IR) to the THz range. Progress in related areas, such as the development …
mid-infrared (mid-IR) to the THz range. Progress in related areas, such as the development …
[HTML][HTML] Quantum cascade laser based hybrid dual comb spectrometer
Four-wave-mixing-based quantum cascade laser frequency combs (QCL-FC) are a powerful
photonic tool, driving a recent revolution in major molecular fingerprint regions, ie mid-and …
photonic tool, driving a recent revolution in major molecular fingerprint regions, ie mid-and …
THz Quartz-enhanced photoacoustic sensor for H2S trace gas detection
We report on a quartz-enhanced photoacoustic (QEPAS) gas sensing system for hydrogen
sulphide (H_2S) detection. The system architecture is based on a custom quartz tuning fork …
sulphide (H_2S) detection. The system architecture is based on a custom quartz tuning fork …
[HTML][HTML] Improved tuning fork for terahertz quartz-enhanced photoacoustic spectroscopy
We report on a quartz-enhanced photoacoustic (QEPAS) sensor for methanol (CH3OH)
detection employing a novel quartz tuning fork (QTF), specifically designed to enhance the …
detection employing a novel quartz tuning fork (QTF), specifically designed to enhance the …
[HTML][HTML] High-resolution terahertz spectroscopy with quantum-cascade lasers
HW Hübers, H Richter, M Wienold - Journal of Applied Physics, 2019 - pubs.aip.org
Terahertz (THz) quantum-cascade lasers (QCLs) are narrow band, high-power, and
frequency-agile sources. These properties make them attractive for applications in high …
frequency-agile sources. These properties make them attractive for applications in high …
[HTML][HTML] Waveguided approach for difference frequency generation of broadly-tunable continuous-wave terahertz radiation
Featured Application Trace gas sensing, local oscillator for astronomical heterodyne
systems, high-accuracy spectroscopy. Abstract The 1–10 terahertz (THz) spectral window is …
systems, high-accuracy spectroscopy. Abstract The 1–10 terahertz (THz) spectral window is …
Doppler-free spectroscopy with a terahertz quantum-cascade laser
M Wienold, T Alam, L Schrottke, HT Grahn… - Optics …, 2018 - opg.optica.org
We report on the Doppler-free saturation spectroscopy of a molecular transition at 3.3 THz
based on a quantum-cascade laser and an absorption cell in a collinear pump-probe …
based on a quantum-cascade laser and an absorption cell in a collinear pump-probe …
Frequency stabilization of a terahertz quantum-cascade laser to the Lamb dip of a molecular absorption line
R Voigt, M Wienold, D Jayasankar, V Drakinskiy… - Optics …, 2023 - opg.optica.org
We demonstrate the frequency stabilization of a terahertz quantum-cascade laser (QCL) to
the Lamb dip of the absorption line of a D_2O rotational transition at 3.3809309 THz. To …
the Lamb dip of the absorption line of a D_2O rotational transition at 3.3809309 THz. To …
Room-temperature continuous-wave frequency-referenced spectrometer up to 7.5 THz
The lack of coherent room-temperature sources in the whole terahertz spectral window (0.3–
10 THz) has significantly hampered the growth of scientific and technological applications in …
10 THz) has significantly hampered the growth of scientific and technological applications in …
Tuning a microcavity-coupled terahertz laser
F Castellano, V Bianchi, L Li, J Zhu… - Applied Physics …, 2015 - pubs.aip.org
Tunable oscillators are a key component of almost all electronic and photonic systems. Yet,
a technology capable of operating in the terahertz (THz)-frequency range and fully suitable …
a technology capable of operating in the terahertz (THz)-frequency range and fully suitable …