Results 11 to 20 of about 8,835 (243)
MOVPE-Grown Quantum Cascade Laser Structures Studied by Kelvin Probe Force Microscopy
Crystals, 2020 A technique for direct study of the distribution of the applied voltage within a quantum cascade laser (QCL) has been developed. The detailed profile of the potential in the laser claddings and laser core region has been obtained by gradient scanning ...
Konstantin Ladutenko +3 more
doaj +1 more source
Photonics, 2023 In this article, we report a high-performance λ ~ 4.6 μm quantum cascade laser grown by metal-organic chemical vapor deposition. Continuous wave power of 3 W was obtained from an 8 mm-long and 7.5 μm wide coated laser at 285 K.
Teng Fei +12 more
doaj +1 more source
Field-resolved high-order sub-cycle nonlinearities in a terahertz semiconductor laser
Light: Science & Applications, 2021 Two-dimensional terahertz strong-field spectroscopy reveals wave-mixing processes up to eighth order in a free-running quantum cascade laser, unraveling its sub-cycle gain dynamics and nonlinearities in a regime of negative absorption.
J. Riepl +13 more
doaj +1 more source
Quantum cascade laser frequency comb locked with 200 mrad residual phase noise [PDF]
EPJ Web of Conferences, 2023 Using near-infrared light, we tightly-lock a mid-infrared quantum cascade laser frequency comb to another laser, achieving a residual integrated phase noise of 200 mrad.
Komagata Kenichi N. +6 more
doaj +1 more source
APL Photonics, 2023 Terahertz quantum cascade laser sources based on intra-cavity Cherenkov difference-frequency generation in dual-wavelength mid-infrared quantum cascade lasers are currently the only monolithic semiconductor laser technology that can deliver continuous ...
Wolfhard Oberhausen +7 more
doaj +1 more source
Room temperature quantum cascade laser with ∼31% wall-plug efficiency
AIP Advances, 2020 In this article, we report the demonstration of a quantum cascade laser emitting at λ ≈ 4.9 μm with a wall-plug efficiency of ∼31% and an output power of ∼23 W in pulsed operation at room temperature with 50 cascade stages (Ns).
F. Wang +3 more
doaj +1 more source
Estimating optical feedback from a chalcogenide fiber in mid-infrared quantum cascade lasers
AIP Advances, 2016 The amount of optical feedback originating from a chalcogenide fiber used to couple light from a mid-infrared quantum cascade laser is evaluated experimentally. Threshold reduction measurements on the fibered laser, combined with an analytical study of a
L. Jumpertz +8 more
doaj +1 more source
Temperature-Insensitive Imaging Properties of a Broadband Terahertz Nonlinear Quantum Cascade Laser
Applied Sciences, 2020 Terahertz (THz) quantum cascade laser sources based on optical nonlinearity are the only electrically pumped monolithic semiconductor sources operable at room temperature in the 0.6–6 THz range.
Atsushi Nakanishi +3 more
doaj +1 more source
Quantum dot cascade laser [PDF]
Nanoscale Research Letters, 2014 Abstract We demonstrated an unambiguous quantum dot cascade laser based on InGaAs/GaAs/InAs/InAlAs heterostructure by making use of self-assembled quantum dots in the Stranski-Krastanow growth mode and two-step strain compensation active region design.
Zhuo, Ning +6 more
openaire +2 more sources
Quantum Cascade Laser Frequency Combs
Nanophotonics, 2016 It was recently demonstrated that broadband quantum cascade lasers can operate as frequency combs. As such, they operate under direct electrical pumping at both mid-infrared and THz frequencies, making them very attractive for dual-comb spectroscopy ...
Faist Jérôme +6 more
doaj +1 more source