Mid-infrared hyperchaos of interband cascade lasers [PDF]
Light: Science & Applications, 2022 AbstractChaos in nonlinear dynamical systems is featured with irregular appearance and with high sensitivity to initial conditions. Near-infrared light chaos based on semiconductor lasers has been extensively studied and has enabled various applications.
Yu Deng +7 more
openaire +3 more sources
Towards Interband Cascade lasers on InP Substrate [PDF]
Materials, 2021 In this study, we propose designs of an interband cascade laser (ICL) active region able to emit in the application-relevant mid infrared (MIR) spectral range and to be grown on an InP substrate. This is a long-sought solution as it promises a combination of ICL advantages with mature and cost-effective epitaxial technology of fabricating materials and
Krzysztof Ryczko +2 more
openaire +2 more sources
Sensitive detection of methane at 3.3 μm using an integrating sphere and interband cascade laser [PDF]
, 2016 Detection of methane at 3.3μm using a DFB Interband Cascade Laser and gold coated integrating sphere is performed. A 10cm diameter sphere with effective path length of 54.5cm was adapted for use as a gas cell.
Davis, Nicholas M. +3 more
core +1 more source
Interband cascade lasers with room temperature threshold current densities below 100 A/cm(2) [PDF]
, 2013 Interband Cascade Lasers (ICLs) with threshold current densities below 100 A/cm(2) in pulsed operation at room temperature are presented. The laser structure comprises 10 active stages of 41 nm length, each stage containing a W-quantum well active region
Höfling, Sven +2 more
core +2 more sources
Quantum cascade lasers with an integrated polarization mode converter [PDF]
, 2012 We discuss the design, fabrication and characterization of waveguide polarization mode converters for quantum cascade lasers operating at 4.6 μm. We have fabricated a quantum cascade laser with integrated polarization mode converter that emits light of ...
Dhirhe, D. +4 more
core +2 more sources
Compact hollow waveguide mid-infrared gas sensor for simultaneous measurements of ambient CO2 and water vapor [PDF]
, 2020 A compact, sensitive and stable hollow waveguide (HWG) mid-infrared gas sensor, based on gas absorption lines using wavelength modulation spectroscopy with a second harmonic (WMS-2f) detection scheme, was developed for simultaneous measurements of ...
Chen, Weidong +7 more
core +3 more sources
Gain and Losses and Room-Temperature Operation in Interband Cascade Lasers
IEEE Photonics Journal, 2012 Interband cascade laser structures with a different number of cascades and doping types and levels in the separate confinement and in the hole-injection regions were grown.
Geunmin Ryu +5 more
doaj +1 more source
Quartz‐Enhanced Photoacoustic Sensors for Detection of Eight Air Pollutants
Advanced Photonics Research, 2023 A quartz‐enhanced photoacoustic spectroscopy sensor architecture capable of detecting eight different air pollutants (CH4, NO2, CO2, N2O, CO, NO, SO2, and NH3) is reported.
Raffaele De Palo +10 more
doaj +1 more source
PAS-based isotopologic analysis of highly concentrated methane
Frontiers in Environmental Chemistry, 2022 Photoacoustic spectroscopy (PAS) is typically used for the detection of trace gases. In this way, mixtures of short-chain hydrocarbons such as methane, ethane or propane can be analyzed with detection limits in the range of parts per million (ppm) or ...
Marc-Simon Bahr +2 more
doaj +1 more source
A measurement strategy for non-dispersive ultra-violet detection of formaldehyde in indoor air: Spectral analysis and interferent gases [PDF]
, 2015 We have conducted an extensive review of published spectra in order to identify a region with potential for detection of formaldehyde in indoor air.
Davenport, John +3 more
core +1 more source