scholarly journals Гетероструктуры квантово-каскадных лазеров с неселективным заращиванием методом газофазной эпитаксии

2021 ◽  
Vol 47 (24) ◽  
pp. 46
Author(s):  
А.В. Бабичев ◽  
А.Г. Гладышев ◽  
Д.В. Денисов ◽  
В.В. Дюделев ◽  
Д.А. Михайлов ◽  
...  
Keyword(s):  
Quantum Cascade Laser ◽  
Surface Defects ◽  
Vapour Phase ◽  
Threshold Current ◽  
Threshold Current Density ◽  
Structural Quality ◽  
Vapour Phase Epitaxy ◽  
Quantum Cascade ◽  
Laser Heterostructures ◽  
Cleaved Facets

The possibility of fabrication of 4.6 µm spectral range quantum-cascade laser heterostructures by molecular-beam epitaxy technique with non-selective overgrowth by the metalorganic vapour-phase epitaxy is shown. The active region of the laser was formed on the basis of a heteropair of In0.67Ga0.33As/In0.36Al0.64As solid alloys. The waveguide claddings are formed by indium phosphide. The results of surface defects inspection and X-ray diffraction analysis of quantum-cascade laser heterostructures allow to conclude that the structural quality of the heterostructures is high and the estimated value of the root mean square surface roughness does not exceed 0.7 nm. Lasers with four cleaved facets exhibit lasing at room temperature with a relatively low threshold current density of the order of 1 kA /cm2.

Low Threshold Current Density Operation of Strain-Compensated Quantum Cascade Laser

2007 ◽  
Vol 24 (3) ◽  
pp. 717-720 ◽  
Author(s):  
Shao Ye ◽  
Li Lu ◽  
Liu Jun-Qi ◽  
Liu Feng-Qi ◽  
Wang Zhan-Guo
Keyword(s):  
Quantum Cascade Laser ◽  
Current Density ◽  
Threshold Current ◽  
Threshold Current Density ◽  
Quantum Cascade ◽  
Low Threshold

scholarly journals THz Quantum Cascade Laser Operating Frequency Comb Over Near-full-current Dynamic Range

2021 ◽  
Author(s):  
Yu Ma ◽  
Yuan-Yuan Li ◽  
Junqi Liu ◽  
Ning Zhuo ◽  
Wei-Jiang Li ◽  
...  
Keyword(s):  
Quantum Cascade Laser ◽  
Current Density ◽  
Dynamic Range ◽  
Frequency Comb ◽  
Dispersion Compensation ◽  
Temperature Stability ◽  
Threshold Current ◽  
Threshold Current Density ◽  
Plasma Waveguide ◽  
Quantum Cascade

Abstract We report a terahertz quantum cascade laser frequency comb (THz QCL FC) with low threshold current density, high power, and wide current dynamic range. The active region design with the semi-insulated surface plasma waveguide is beneficial to optimize the gain dispersion value and temperature stability. At 10K, the comb with 3-mm-long and 150-µm-wide is capable of emitting 22mW with the threshold current density Jth = 64.4 A·cm−2. The total spectral emission is of about 300 GHz centered around 4.6 THz. Without any extra dispersion compensation measures, the intermode beatnote map reveals stable frequency comb operating within a current dynamic range more than 97% and the narrowest beatnote linewidth is 7.2 kHz. The stable FC operation of a free-running THz QCL makes our device an ideal source for further development of dual-comb spectroscopy.

Metalorganic vapour phase epitaxy of GaAs/AlGaAs nanoheterostructures for a quantum cascade laser

2017 ◽  
Vol 53 (9) ◽  
pp. 891-895
Author(s):  
A. A. Marmalyuk ◽  
A. A. Padalitsa ◽  
M. A. Ladugin ◽  
P. V. Gorlachuk ◽  
I. V. Yarotskaya ◽  
...  
Keyword(s):  
Quantum Cascade Laser ◽  
Vapour Phase ◽  
Vapour Phase Epitaxy ◽  
Quantum Cascade ◽  
Metalorganic Vapour Phase Epitaxy

High power λ ~ 8.5 μm quantum cascade laser grown by MOCVD operating continuous-wave up to 408 K

2021 ◽  
Vol 42 (11) ◽  
pp. 112301
Author(s):  
Teng Fei ◽  
Shenqiang Zhai ◽  
Jinchuan Zhang ◽  
Ning Zhuo ◽  
Junqi Liu ◽  
...  
Keyword(s):  
Output Power ◽  
Quantum Cascade Laser ◽  
Continuous Wave ◽  
Light Emission ◽  
Chemical Vapor ◽  
Threshold Current ◽  
Growth Conditions ◽  
Threshold Current Density ◽  
Organic Chemical ◽  
Quantum Cascade

Abstract Robust quantum cascade laser (QCL) enduring high temperature continuous-wave (CW) operation is of critical importance for some applications. We report on the realization of lattice-matched InGaAs/InAlAs/InP QCL materials grown by metal-organic chemical vapor deposition (MOCVD). High interface quality structures designed for light emission at 8.5 μm are achieved by optimizing and precise controlling of growth conditions. A CW output power of 1.04 W at 288 K was obtained from a 4 mm-long and 10 μm-wide coated laser. Corresponding maximum wall-plug efficiency and threshold current density were 7.1% and 1.18 kA/cm2, respectively. The device can operate in CW mode up to 408 K with an output power of 160 mW.

scholarly journals Гетероструктуры квантово-каскадных лазеров спектрального диапазона 4.6 μm для реализации непрерывного режима генерации

2020 ◽  
Vol 46 (9) ◽  
pp. 35
Author(s):  
А.В. Бабичев ◽  
А.Г. Гладышев ◽  
В.В. Дюделев ◽  
Л.Я. Карачинский ◽  
И.И. Новиков ◽  
...  
Keyword(s):  
Room Temperature ◽  
Molecular Beam ◽  
Threshold Current ◽  
Threshold Current Density ◽  
X Ray Diffraction ◽  
X Ray ◽  
Quantum Cascade ◽  
Cleaved Facets ◽  
Low Threshold ◽  
Solid Alloys

An elastically balanced heterostructure of a 4.6-μm wavelength range quantum-cascade laser was grown by using molecular beam epitaxy. Heterostruсture was based on a heteropair of In0.67Ga0.33As / In0.36Al0.64As solid alloys and indium phosphide layers, which served as waveguide claddings. A high homogeneity of the layers composition and thicknesses in cascades over the wafer was proved by using X-ray diffraction for the grown heterostructure. Lasers with four cleaved facets operate at room temperature at a wavelength near 4.6 μm with a low threshold current density of 1.1 kA / cm2

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