Results 51 to 60 of about 2,314,699 (185)
Frequency-Comb-Assisted Terahertz Quantum Cascade Laser Spectroscopy
Physical Review X, 2014 We report a metrological-grade THz spectroscopy based on the combination of a THz frequency-comb synthesizer (FCS) and a THz quantum cascade laser (QCL).
S. Bartalini +10 more
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Towards a compact THz local oscillator based on a quantum cascade laser [PDF]
, 2010 Heterodyne spectroscopy of molecular rotational lines and atomic fine-structure lines is a powerful tool in astronomy and planetary research. One example is the OI fine-structure line at 4.7 THz.
Richter, Heiko +9 more
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Monolithic, Optically Coupled, Multi-Section Mid-IR Quantum Cascade Lasers
Photonics, 2021 Mid-infrared (mid-IR λ ≈ 3–12 μm), single-mode-emission Quantum Cascade Lasers (QCLs) are of significant interest for a wide range of applications, especially as the laser sources are chosen for laser absorption spectroscopy. In this work, we present the
Kamil Pierściński +6 more
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Simulating Quantum Cascade Lasers: The Challenge to Quantum Theory
, 2023 Quantum cascade lasers provide a variety of challenges to theory, which are outlined in this review: (i) The choice of basis states is discussed, where energy eigenstates are badly defined if the full periodic structure is considered.
Lund University., Wacker, Andreas,
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Anti-correlation phenomena in quantum cascade laser frequency combs
APL Photonics, 2023 In quantum cascade laser frequency combs, the intensity distribution of the optical spectrum can be split into two well-separated lobes of longitudinal modes that, even when far apart, have a common phase relation and preserve equal frequency separation.
B. Chomet +10 more
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Universal Quasi-Level Parameter for the Characterization of Laser Operation
IEEE Photonics Journal, 2018 A parameter is proposed which classifies the laser operating characteristics according to the quasi-level terminology, i.e., as intermediate behavior between that of an ideal two- and three-level or three- and four-level laser scheme.
Christian Jirauschek
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Condensed Matter Physics, 2013 Using the effective mass and rectangular potential approximations, the theory of electron dynamic conductivity is developed for the plane multilayer resonance tunnel structure placed into a constant electric field within the model of open nanosystem, and
M.V. Tkach +3 more
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Sensors, 2016 The need for highly performing and stable methods for mid-IR molecular sensing and metrology pushes towards the development of more and more compact and robust systems.
Simone Borri +15 more
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Ultrabroadband air-dielectric double-chirped mirrors for laser frequency combs
Light: Science & ApplicationsDispersion engineering is critical for the creation of integrated broadband laser frequency combs. In the long wavelength infrared range (LWIR, 8-13 µm), frequency combs based on quantum cascade lasers are attractive since they are monolithic ...
Tianyi Zeng +5 more
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Frequency-tunable external cavity terahertz quantum cascade laser
, 2009 We demonstrate a tunable terahertz quantum cascade laser using an abutted silicon lens and grating feedback.
Qi Qin +9 more
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