mid-infrared tunable laser
Active Hyperspectral Mid-Infrared Imaging Based on Widely Tunable QCL Laser
... Keywords: hyperspectral imaging, mid-infrared, tunable QCL laser, plant monitoring, image processing. 1. INTRODUCTION Multi/hyperspectral imaging is a method used for classifying and mapping ...
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Active hyperspectral mid-infrared imaging based on a widely tunable quantum cascade laser for early detection of plant water stress
... widely tunable infrared quan- tum cascade laser (QCL) allow us to propose an active hyperspectral imaging system operating in the mid-infrared (MIR) band, where the system output ...
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Mid-infrared reflectance spectroscopy of oil sands minerals based on tunable quantum cascade lasers
... of tunable external cavity quantum cascade lasers (ECQCL) emitting in the mid-infrared (mid-IR) range is enabling laser-based mid-IR spectroscopy in many applications 5–6 and ...
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Measuring the Boltzmann constant by mid-infrared laser spectroscopy of ammonia
... 2 laser to a microwave electro-optic modulator (MW-EOM) which generates two sidebands (SB+ and SB-) tunable from 8 to 18 GHz on each side of the fixed CO 2 laser ...the laser carrier is about ...
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Mid-infrared observations of O-type stars: spectral morphology
... detectable mid-IR line emission ...the mid-IR beyond the con- tinuum flux ...pure mid-IR ...acquire mid-IR spectra of main-sequence massive stars in regions with extremely high visual ...
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Coherent Mid-Infrared Supercontinuum Sources in Silicon- Germanium Waveguides
... 5 Université Grenoble Alpes,CEA-Leti, 38054 Grenoble Cedex 9, France 6 e-mail : alberto.della-torre@ec-lyon.fr Abstract: We report coherent mid-infrared supercontinuum generation in silicon-germanium ...
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Mode-locked pulses from mid-infrared Quantum Cascade Lasers
... In general, the gain recovery in QCL’s based on “diagonal transition” has a complex dynamics [20]. The gain recovery is defined by time-dependent transport through both active region and injector. The most important ...
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Investigation of mid-infrared supercontinuum generation in soft-glass fibers from a Q-switched mode-locked 2 mm fiber laser
... losses of around 0.006 dB m at the wavelength of 2 µm (equation 2.52) and will be neglected in further calculations. The fiber is cleaved at one side under an angle of 0 ◦ , which is used as output coupler of the ...
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Prediction of fatty acid contents by mid-infrared spectrometry
... Key Words: Aatoxin M1, Ewe’s milk, Cheese T106 Prediction of fatty acid contents by mid-infrared spectrometry. P. Dardenne 1 , F. Dehareng 1 , H. Soyeurt* 2,3 , and N. Gengler 2,4 , 1 Agricultural Walloon ...
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Towards private optical communications with mid infrared chaotic light
... response laser when it is biased at ...response laser after injection of the output of the drive laser when the response laser is biased at ...drive laser and the response ...
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Characterizing exoplanetary atmospheres with a mid-infrared nulling interferometer
... The observing challenge History • Several industrial studies in Europe mid 2000s (Alcatel and Astrium) • Extensively studied by NASA/JPL until 2007 • Proposed to ESA as L mission in 200[r] ...
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Recent Progresses in Mid Infrared Nanocrystal based Optoelectronics
... appear particularly uniform in the TEM image, showing the possibility of further improvements. Using cation exchange, it is possible to start from CdTe and CdSe nanoplatelets [23-25] (NPL) with a perfectly controlled ...
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High power tunable diode-pumped Yb3+:CaF2 laser
... when lasing occurs at shorter wavelengths, ⬃1 mm. We also note that the emission spectrum extends up to nearly 1080 nm, which is promising for the development of new broadly tunable laser sources, as well ...
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Characterizing exoplanetary atmospheres with a mid-infrared nulling spectrograph
... space-based mid-infrared nulling spectrograph that can characterize a large number of exoplanetary atmospheres and provide key information on their size, surface temperature, and the presence of key ...
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Characterizing Proxima b with a mid-infrared nulling spectrograph
... • Aperture diameter required to detect a given ratio of planets based. on Kepler’s statistics (work in progress, L.[r] ...
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Frequency noise correlation between the offset frequency and the mode spacing in a mid-infrared quantum cascade laser frequency comb
... The measured transfer functions are displayed in Fig. 4 . They present the same behavior, both in amplitude and in phase, with a flat amplitude response up to ∼10 kHz. This limited bandwidth results from the fact that ...
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Antiresonances in the mid-infrared vibrational spectrum of functionalized graphene
... The infrared spectra of covalently functionalized graphene show Fano-like antiresonances, which we demon- strate to emerge from scattering with randomly distributed grafts, thereby allowing momentum transfer ...
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Air-clad silicon pedestal structures for broadband mid-infrared microphotonics
... the mid-IR probe light is well confined inside the pedestal Si ...broadband mid-IR signals ...a mid-IR lossy oxide cladding which is known to have considerable attenua- tion at λ > ...
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GaAs/AlOx high-contrast grating mirrors for mid-infrared VCSELs
... L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignemen[r] ...
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Noninvasive detection of bladder cancer using mid-infrared spectra classification
... Abstract In this paper, we focus on the detection of Bladder Cancer (BC) via mid infrared spectroscopy. Two main contributions, material and methods, are presented. In terms of material, a new minimally ...
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