Results 261 to 270 of about 15,014 (299)
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2009
As a result of mass production, millions of semiconductor diode lasers are manufactured each month and appear in products ranging from telecommunications transmitters to DVD players and laser pointers. For traditional laser diodes, the applications are often dictated by what part of the electromagnetic spectrum is accessible.
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As a result of mass production, millions of semiconductor diode lasers are manufactured each month and appear in products ranging from telecommunications transmitters to DVD players and laser pointers. For traditional laser diodes, the applications are often dictated by what part of the electromagnetic spectrum is accessible.
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Terahertz Quantum Cascade Lasers
Asia Optical Fiber Communication and Optoelectronic Exposition and Conference, 2007Six years after their birth, terahertz quantum-cascade lasers can now deliver milliwatts or more of continuous-wave coherent radiation throughout the terahertz range — the spectral regime between millimetre and infrared wavelengths, which has long resisted development.
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Cascaded-transition Quantum Cascade laser
2012 Lester Eastman Conference on High Performance Devices (LEC), 2012The Quantum Cascade (QC) laser is a semiconductor laser based on intersubband transitions in the conduction band of a multiple quantum-well heterostructure, and is a highperformance light source in the mid-infrared and terahertz region. With the aim of improving the quantum efficiency and power efficiency of long-wavelength QC lasers, based on the ...
Jingyuan Linda Zhang +4 more
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Interband Cascade and Quantum Cascade Ring Lasers
Conference on Lasers and Electro-Optics, 2020Quantum cascade and interband cascade lasers are fabricated into surface and substrate emitting coherent light sources and detectors. We report about latest achievements in terms of power, temperature and dynamic performance of on-chip sensing systems.
Hedwig Knotig +6 more
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Microcavity-Stabilized Quantum Cascade Laser
Conference on Lasers and Electro-Optics, 2016A CaF2 whispering gallery mode microresonator is used for frequency stabilization and linewidth narrowing of a mid-IR quantum cascade laser. Sub-Doppler recording of a CO2 transition demonstrates the suitability of the system for high-resolution spectroscopy.
Borri Simone +16 more
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2013
THz sources are the fundamental requirement for THz technology even for passive detection systems where sources are required for heterodyne detection to improve detectivity. A review is given for one such THz source, the quantum cascade laser. Quantum cascade lasers are unipolar, intersubband photon emitters that can be tuned through the width of ...
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THz sources are the fundamental requirement for THz technology even for passive detection systems where sources are required for heterodyne detection to improve detectivity. A review is given for one such THz source, the quantum cascade laser. Quantum cascade lasers are unipolar, intersubband photon emitters that can be tuned through the width of ...
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SILICON-GERMANIUM QUANTUM-CASCADE LASERS
International Journal of High Speed Electronics and Systems, 2003The prospects and advantages of silicon germanium quantum cascade lasers are discussed, from both physical and technological perspectives. A range of Si/SiGe intersubband laser configurations are discussed, for both edge and surface emission. Recent experimental activity on mid- and far-infrared devices is reviewed, and the value of detailed ...
Robert W. Kelsall, Richard A. Soref
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2017
The quantum cascade laser represents an important accomplishment in quantum photonics, combining quantum excitation of the electromagnetic field, electron transport and controllable quantum mechanical tunneling all working cooperatively in a single device. In cascade lasers, the carriers are “recycled” from one stage to the next, so that the evacuation
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The quantum cascade laser represents an important accomplishment in quantum photonics, combining quantum excitation of the electromagnetic field, electron transport and controllable quantum mechanical tunneling all working cooperatively in a single device. In cascade lasers, the carriers are “recycled” from one stage to the next, so that the evacuation
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Microcavity‐Stabilized Quantum Cascade Laser
Laser & Photonics Reviews, 2015Narrow‐linewidth lasers are key elements in optical metrology and spectroscopy. Spectral purity of these lasers determines accuracy of the measurements and quality of collected data. Solid state and fiber lasers are stabilized to relatively large and complex external optical cavities or narrow atomic and molecular transitions to improve their spectral ...
Siciliani de Cumis Mario +10 more
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Frequency Characterization of a Terahertz Quantum-Cascade Laser
IEEE Transactions on Instrumentation and Measurement, 2007In this paper, the frequency characteristics of a tera-hertz quantum-cascade laser (QCL) operating around 2.5-THz in the pulsed regime have been studied by means of a heterodyne detection by using an optically pumped molecular laser as the local oscillator.
BEVERINI, NICOLO' +7 more
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