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In an external cavity (EC) quantum cascade laser, the quantum cascade device serves as the laser gain medium. One, or both, of the waveguide facets has an anti-reflection coating that defeats the optical cavity action of the cleaved facets. Mirrors are then arranged in a configuration external to the QC device to create the optical cavity.
In a standard multiple quantum well laser, the active quantum wells used to generate photons are connected in parallel. Consequently, a large current is required to replenish each active well with electrons as it emits light. In a cascade laser, the wells are connected in series, meaning that the voltage is higher but the current is lower.
In 2014, Thorlabs acquired Corning Inc.'s line of quantum cascade lasers and entered into a partnership with Daylight Solutions to produce the laser for defense and security applications. [28] In 2015, Thorlabs acquired Pantec's line of Elliptec product line. [29] In 2018, Thorlabs acquired Norland Products' line of fiber optic products. [30]
In 2002, Daniel Hofstetter, Mattias Beck and Jérôme Faist reported the first ever use of an InGaAs/InAlAs quantum-cascade-laser structure for photodetection at room temperature. The specific detectivity of the device was shown to be comparable to the detectivity of more established detectors at the time, such as QWIPs or HgCdTe detectors. [ 13 ]
Quantum cascade laser (QCL) is a construction of such alternative. It is a solid-state semiconductor laser that can operate continuously with output power of over 100 mW and wavelength of 9.5 μm. A prototype was already demonstrated. [2] and potential use shown. [3] A molecular FIR laser optically pumped by a QCL has been demonstrated in 2016. [4]
QCL may refer to: Air Class Líneas Aéreas (ICAO Code: QCL) Queen's College, London; Queensland Cement and Lime Company, a building material manufacturer in Australia; Quantum cascade laser; Quantum Computation Language
Laser direct infrared imaging (LDIR) is an infrared microscopy architecture that utilizes a tunable Quantum Cascade Laser (QCL) as the IR source. [1] This new reflectance-based architecture eliminates coherence artifacts typically associated with QCLs.
The concept of laser detuning emerged in tandem with formative experiments in laser physics. One of the earliest examples of high-impact work demonstrating the practical uses of laser detuning was Arthur Ashkin’s research in the 1970s, resulting in the first optical trapping demonstrations for which he was awarded the 2018 Nobel Prize in Physics. [3]