scholarly journals Mid-infrared cavity-enhanced absorption sensor for ppb-level N2O detection using an injection-current-modulated quantum cascade laser

2021 ◽  
Author(s):  
Min Yang ◽  
Zhen WANG ◽  
Qinxue Nie ◽  
Kai Ni ◽  
Wei Ren
Keyword(s):  
Quantum Cascade Laser ◽  
Injection Current ◽  
Mid Infrared ◽  
Quantum Cascade ◽  
Enhanced Absorption

scholarly journals Mid-infrared quantum cascade laser frequency combs with a microstrip-like line waveguide geometry

2021 ◽  
Vol 118 (7) ◽  
pp. 071101
Author(s):  
Filippos Kapsalidis ◽  
Barbara Schneider ◽  
Matthew Singleton ◽  
Mathieu Bertrand ◽  
Emilio Gini ◽  
...  
Keyword(s):  
Quantum Cascade Laser ◽  
Laser Frequency ◽  
Mid Infrared ◽  
Frequency Combs ◽  
Quantum Cascade ◽  
Waveguide Geometry

Impact of Injector Doping on Threshold Current of Mid-Infrared Quantum Cascade Laser–Non-Equilibrium Green’s Function Analysis

2015 ◽  
Vol 21 (1) ◽  
pp. 124-133 ◽  
Author(s):  
Andrzej Kolek ◽  
Grzegorz Haldas ◽  
Maciej Bugajski ◽  
Kamil Pierscinski ◽  
Piotr Gutowski
Keyword(s):  
Green’S Function ◽  
Green's Function ◽  
Quantum Cascade Laser ◽  
Function Analysis ◽  
Threshold Current ◽  
Mid Infrared ◽  
Quantum Cascade ◽  
Non Equilibrium Green’S Function ◽  
Non Equilibrium

Direct Determination of Transparency Current in Mid-Infrared Quantum Cascade Laser

2012 ◽  
Author(s):  
D. G. Revin ◽  
R. S. Hassan ◽  
A. B. Krysa ◽  
K. Kennedy ◽  
A. N. Atkins ◽  
...  
Keyword(s):  
Quantum Cascade Laser ◽  
Direct Determination ◽  
Mid Infrared ◽  
Quantum Cascade

scholarly journals A widely tunable 10-μm quantum cascade laser phase-locked to a state-of-the-art mid-infrared reference for precision molecular spectroscopy

2014 ◽  
Vol 104 (26) ◽  
pp. 264101 ◽  
Author(s):  
P. L. T. Sow ◽  
S. Mejri ◽  
S. K. Tokunaga ◽  
O. Lopez ◽  
A. Goncharov ◽  
...  
Keyword(s):  
Quantum Cascade Laser ◽  
Molecular Spectroscopy ◽  
State Of The Art ◽  
Mid Infrared ◽  
Quantum Cascade

Mid-infrared Quantum Cascade Laser Gas Detection System

2018 ◽  
Vol 47 (4) ◽  
pp. 423001
Author(s):  
LIN Bai-yang ◽  
DANG Jing-min ◽  
ZHENG Chuan-tao ◽  
ZHANG Yu ◽  
WANG Yi-ding
Keyword(s):  
Quantum Cascade Laser ◽  
Detection System ◽  
Gas Detection ◽  
Mid Infrared ◽  
Quantum Cascade

scholarly journals Chaotic optical power dropouts driven by low frequency bias forcing in a mid-infrared quantum cascade laser

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Olivier Spitz ◽  
Jiagui Wu ◽  
Mathieu Carras ◽  
Chee-Wei Wong ◽  
Frédéric Grillot
Keyword(s):  
Quantum Cascade Laser ◽  
Low Frequency ◽  
Optical Power ◽  
Mid Infrared ◽  
Quantum Cascade

scholarly journals Theoretical and Experimental Study of Heterodyne Phase-Sensitive Dispersion Spectroscopy with an Injection-Current-Modulated Quantum Cascade Laser

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 6176
Author(s):  
Zhen Wang ◽  
Kin-Pang Cheong ◽  
Mingsheng Li ◽  
Qiang Wang ◽  
Wei Ren
Keyword(s):  
Experimental Study ◽  
Analytical Model ◽  
Quantum Cascade Laser ◽  
Near Infrared ◽  
Optical Modulator ◽  
Line Center ◽  
Mid Infrared ◽  
Quantum Cascade ◽  
Electro Optical Modulator ◽  
Phase Sensitive

We report the theoretical and experimental study of calibration-free heterodyne phase-sensitive dispersion spectroscopy (HPSDS) in the mid-infrared using a direct current modulated mid-infrared quantum cascade laser (QCL). The modulation of QCL current at several hundred MHz or higher generates the synchronous frequency and intensity modulation of the QCL emission. An analytical model of the phase of the beat note signal in HPSDS is derived by considering the absorption and dispersion processes and incorporating the QCL modulation parameters. In the experiment, a 4.5 μm QCL modulated at 350 MHz was used to measure N2O at 200 Torr in a 10 cm gas cell. The N2O concentrations inferred from the analytical model were compared with the nominal values to show good agreement over the concentration range of 189−805 ppm with a standard deviation <3%. When the QCL wavelength was locked at the line-center of the molecular transition, it was of interest to find that the theoretical model was simplified to that used for near-infrared HPSDS with an electro-optical modulator for laser modulation.

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