Results 31 to 40 of about 3,950 (203)

Infrared generation in low-dimensional semiconductor heterostructures via quantum coherence [PDF]

, 2000
A new scheme for infrared generation without population inversion between subbands in quantum-well and quantum-dot lasers is presented and documented by detailed calculations.
A. A. Belyanin, A. Imamoglu, A.V. Uskov, B. Jensen, C. Sirtori, D. Bimberg, E.A. Korsunsky, F. Bassani, F. Capasso, F. Capasso, H. Schmidt, J. Faist, J. Singh, J. Vanier, M. Asada, M. Hartig, M. O. Scully, M. O. Scully, M.O. Scully, O. Kocharovskaya, O. Kocharovskaya, O. Kocharovskaya, R.F. Kazarinov, S.E. Harris, T.R. Chen, V. V. Kocharovsky, Vl. V. Kocharovsky, W. W. Chow, Y. Tokuda   +28 more
core   +3 more sources

Interferometric Technique for the Spectral Characterization of High Frequency Current-Modulated Mid-Infrared Semiconductor Lasers

Photonics, 2021
We describe two methods, based on Michelson interferometery, that enable the determination of the absolute wavelength of current-modulated semiconductor lasers.
Marc-Simon Bahr, Marcus Wolff
doaj   +1 more source

Progress towards photonic crystal quantum cascade laser [PDF]

, 2004
The work describes recent progress in the design, simulation, implementation and characterisation of photonic crystal (PhC) GaAs-based quantum cascade lasers (QCLs).
C.D. Farmer, C.L. Walker, C.N. Ironside, C.R. Stanley, Faist   +4 more
core   +1 more source

Resonant photoacoustic cells for laser-based methane detection [PDF]

Journal of Sensors and Sensor Systems, 2023
Against the background of the steady increase in greenhouse gases in the atmosphere, a fast and inexpensive method for detecting methane is required. This applies to the direct measurement of the background concentration of methane in the atmosphere and ...
K. Schmitt, K. Schmitt, M. Sendelbach, M. Sendelbach, C. Weber, C. Weber, J. Wöllenstein, J. Wöllenstein, T. Strahl, T. Strahl   +9 more
doaj   +1 more source

The driver design for N2O gas detection system based on tunable interband cascade laser

E3S Web of Conferences, 2019
In this paper, the driver circuit for N2O gas detection system based on tunable interband cascade laser (ICL) is developed. Considering the influence of power supply stability on the digital-analog hybrid drive circuit of tunable diode laser absorption ...
Liao Lihuan, Zhang Jingjing, Dong Daming
doaj   +1 more source

Unveiling quantum-limited operation of interband cascade lasers

APL Photonics, 2020
A comprehensive experimental analysis of the frequency fluctuations of a mid-infrared interband cascade laser, down to the quantum-limited operation, is reported.
Simone Borri, Mario Siciliani de Cumis, Silvia Viciani, Francesco D’Amato, Paolo De Natale   +4 more
doaj   +1 more source

PAS-based analysis of natural gas samples

Frontiers in Chemistry, 2023
Photoacoustic spectroscopy (PAS) is well known for the detection of short-chain hydrocarbons, such as methane, ethane and propane, in the ppm (parts per million) or ppb (parts per billion) range.
Marc-Simon Bahr, Marc-Simon Bahr, Marcus Wolff   +2 more
doaj   +1 more source

Mid-infrared LEDs versus thermal emitters in IR dynamic scene simulation devices [PDF]

, 2006
In a radical departure from conventional thermal emitter-based dynamic IR scene simulation devices, we have tested InAsSbP/InAs LEDs grown by liquid phase epitaxy and tuned at several peak-emitting wavelengths inside the mid-IR band.
Malyutenko, V. K., Zinovchuk, A. V.
core   +1 more source

Absolute frequency referencing for swept dual-comb spectroscopy with midinfrared quantum cascade lasers

Physical Review Research, 2023
Quantum cascade laser (QCL) frequency combs have revolutionized midinfrared (MIR) spectroscopy by their high brightness and fast temporal resolution, and are a promising technology for fully integrated and cost-effective sensors.
K. N. Komagata, V. J. Wittwer, T. Südmeyer, L. Emmenegger, M. Gianella   +4 more
doaj   +1 more source

Detection of Ethanol Using a Tunable Interband Cascade Laser at 3.345 μm

Photonic Sensors, 2018
With the progress of the laser manufacturing technology, trace gas sensors based on tunable interband cascade lasers (ICLs) and quantum cascade lasers (QCLs) have been widely used to detect organic compounds with high sensitivity.
Hui Gao, Liang Xie, Ping Gong, Hui Wang
doaj   +1 more source