quantum cascade laser
Broadband terahertz gas spectroscopy through multimode self-mixing in a quantum cascade laser
... multimode quantum cascade ...double-metal quantum cascade laser device are used increase the optical feedback and the l aser’s frequency tuning ...two laser modes at ...
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Selective measurements of NO, NO2 and NO yin the free troposphere using quantum cascade laser spectroscopy
... wave quantum cascade laser (cw-QCL) ...individual laser beams are first collected by a pair of reflective objectives then combined and co-oriented by a dichroic mirror (LohnStar Optics, ...the ...
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Continuous wave room temperature external ring cavity quantum cascade laser
... on quantum cascade laser (QCL) gain ...the laser temporal and spectral stability in all linear cavity ...the laser to emit mainly in one preferable direction achieving the ratio about 9 ...
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A model for a pulsed terahertz quantum cascade laser under optical feedback
... the laser, as well as the nature of the external ...a laser under both optical feedback and pulsed operation therefore requires a detailed model that includes laser-specific thermal and electronic ...
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Fully phase-stabilized quantum cascade laser frequency comb
... based Quantum Cascade Laser combs (QCL-combs) are ideal candidates, in this respect, due to the unique possibility to tailor their spectral emission by proper nanoscale design of the quantum ...
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Coherent three-dimensional terahertz imaging through self-mixing in a quantum cascade laser
... the quantum cascade laser (QCL) 1 has established itself as one of the most promising radiation sources for imaging applications 2–6 at terahertz (THz) fre- ...with quantum noise-limited ...
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Purity monitoring in medical gas supply lines with quantum cascade laser technology
... Received: 30 September 2016 – Revised: 18 March 2017 – Accepted: 27 March 2017 – Published: 13 April 2017 Abstract. Because of their direct impact on patients, medical supply lines are under strict regulations and have ...
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Quantum cascade laser-based mid-infrared spectrochemical imaging of tissue and biofluids
... This is the peer reviewed version of the following article: Clemens, G., Bird, B., Weida, M., Rowlette, J., & Baker, M. J. (2014). Quantum cascade laser- based mid-infrared spectrochemical ...
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Terahertz sensing and imaging using a quantum cascade laser
... Abstract —We demonstrate terahertz (THz) frequency imaging and sensing using a single quantum cascade laser (QCL) device for both generation and sensing of THz radiation. Detection is achieved by ...
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Tapered Quantum Cascade Laser Arrays Integrated with Talbot Cavities
... Quantum cascade laser (QCL), invented in 1994, has been one of the most important light sources in mid- and far-infrared for its wavelength flexibility and portability [1 – ...
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Improving the Out-Coupling of a Metal-Metal Terahertz Frequency Quantum Cascade Laser Through Integration of a Hybrid Mode Section into the Waveguide
... A hybrid mode section is integrated into the end of the metal-metal waveguide of a terahertz (THz) frequency quantum cascade laser (QCL) by removing sub-wavelength portions of the top metal layer. ...
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Line defect photonic crystal terahertz quantum cascade laser
... (THz) quantum cascade laser (QCL) provides a versatile tool in a plethora of applications ranging from spectroscopy to astronomy and ...the laser active region (AR), centered around ∼ 2 THz by ...
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Sample Grating Distributed Feedback Quantum Cascade Laser Array
... feedback quantum cascade laser (DFB-QCL) featuring narrow linewidth, high power, and simple fabrication process become extremely useful for spectroscopy [2, ...
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3.5 THz quantum-cascade laser emission from dual diagonal feedhorns
... Antenna-pattern measurements obtained from a double-metal supra-terahertz-frequency (supra-THz) quantum cascade laser (QCL) are presented. The QCL is mounted within a mechanically micro-machined ...
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Terahertz Nanoscopy of Plasmonic Resonances with a Quantum Cascade Laser
... a quantum cascade laser implemented both as source and detector in a self-mixing scheme utilizing resonant quartz tuning forks as a sensitive nano-positioning ...The quantum cascade ...
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Electron-phonon relaxation rates and optical gain in a quantum cascade laser in a magnetic field
... AlGaAs quantum cascade laser in a magnetic field, based on solving the set of rate equations that describe the carrier density in each level, accounting for the optical- and acoustic-phonon ...
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Tunable and compact dispersion compensation of broadband THz quantum cascade laser frequency combs
... Abstract: Miniaturized frequency combs (FCs) can be self-generated at terahertz (THz) frequencies through four-wave mixing in the cavity of a quantum cascade laser (QCL). To date, however, stable ...
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3.5-THz quantum-cascade laser emission from dual diagonal feedhorns
... Despite their excellent potential as supra-THz LO sources, quantum-cascade laser (QCL) devices are renowned for exhibiting a poor free-space power distribution, i.e. poor antenna pattern quality. ...
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Injection locking of a terahertz quantum cascade laser to a telecommunications wavelength frequency comb
... frequency quantum cascade laser (QCL), however, the linewidth of this com- pact semiconductor laser is typically too broad for many applications, and its frequency is not directly referenced ...
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The study of optical gain for terahertz quantum cascade laser using density matrix method
... The terahertz (THz) band is the part of electromagnetic spectrum located between photonics and electronics regions. It is a safe and harmless radiation because of its non-ionizing characteristic [1]. It can penetrate ...
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