scholarly journals Лазерная генерация многопериодных квантово-каскадных лазеров на длине волны излучения 8 мкм при комнатной температуре

2018 ◽  
Vol 52 (8) ◽  
pp. 954
Author(s):  
А.В. Бабичев ◽  
А.Г. Гладышев ◽  
А.С. Курочкин ◽  
Е.С. Колодезный ◽  
Г.С. Соколовский ◽  
...  
Keyword(s):  
Molecular Beam ◽  
Cavity Length ◽  
Quantum Cascade Lasers ◽  
Threshold Current ◽  
Threshold Current Density ◽  
Quantum Cascade ◽  
Inp Substrate ◽  
Ridge Width ◽  
Ridge Lasers ◽  
Cascade Lasers

AbstractRoom-temperature lasing at a wavelength of 8 μm in multistage quantum-cascade lasers pumped by current pulses is demonstrated. A quantum-cascade laser heterostructure based on the In_0.53Ga_0.47As/A_l0.48In_0.52As alloy heteropair, matched to an InP substrate, is grown by molecular-beam epitaxy and consists of 50 identical cascades placed in a waveguide with air as the top cladding. A threshold current density of ~5.1 kA/cm^2 at a temperature of 300 K is obtained in ridge lasers with a cavity length of 1.4 mm and a ridge width of 24 μm.

scholarly journals Генерация квантово-каскадного лазера с тонкой верхней обкладкой

2019 ◽  
Vol 127 (8) ◽  
pp. 278
Author(s):  
А.В. Бабичев ◽  
А.Г. Гладышев ◽  
Д.В. Денисов ◽  
Л.Я. Карачинский ◽  
И.И. Новиков ◽  
...  
Keyword(s):  
Indium Phosphide ◽  
Molecular Beam ◽  
Quantum Cascade Lasers ◽  
Characteristic Temperature ◽  
Threshold Current ◽  
Threshold Current Density ◽  
Quantum Cascade ◽  
Cladding Layer ◽  
Inp Substrate ◽  
Cascade Lasers

Experimental results on the manufacturing and study of the properties of 7-8 μm wavelength range injection quantum-cascade lasers (QCLs) with a waveguide with a thin top cladding layer based on indium phosphide are presented. The heterostructure is formed by molecular beam epitaxy on an InP substrate, with a In0.53Ga0.47As/Al0.48In0.52As active region. Lasing at a wavelength of 7.8 μm at a temperature of 300 K with a threshold current density of ~ 6 kA / cm2 is obtained. Characteristic temperature T0 and T1 values for the QCLs are about 150 K and 450 K, respectively. Obtained results confirm the promising design of the QCLs with a waveguide with a thin top cladding layer for detecting liquids and microfluidic devices development.

Dependence of Threshold Current Density on the Waveguide Ridge Width in Quantum-Cascade Lasers

2010 ◽  
Vol 46 (9) ◽  
pp. 1320-1326 ◽  
Author(s):  
Gabriel Beji ◽  
Zoran Ikonic ◽  
Dragan Indjin ◽  
Craig A. Evans ◽  
Paul Harrison
Keyword(s):  
Current Density ◽  
Quantum Cascade Lasers ◽  
Threshold Current ◽  
Threshold Current Density ◽  
Quantum Cascade ◽  
Ridge Width ◽  
Cascade Lasers

Quantum Cascade Lasers

2020 ◽  
pp. 491-526
Author(s):  
Vurgaftman Igor
Keyword(s):  
Quantum Cascade Lasers ◽  
Threshold Current ◽  
Threshold Current Density ◽  
Interface Roughness ◽  
Frequency Combs ◽  
Quantum Cascade ◽  
Wall Plug Efficiency ◽  
Interface Roughness Scattering ◽  
Cascade Lasers ◽  
Considerable Detail

This chapter describes the most commonly used approaches for computing the band structure of active materials with intersubband optical transitions. The physics of quantum cascade lasers (QCLs) is discussed in detail, including the mechanisms that limit the threshold current density, threshold voltage, wall-plug efficiency, and temperature sensitivity of state-of-the-art devices. The important roles of phonon and interface roughness scattering in determining threshold are emphasized. The chapter also compares the performance of QCLs to other mid-IR lasers in considerable detail and makes some conclusions as to which sources are preferred depending on the emission wavelength and application. Finally, the physical principles of laser-based frequency combs, including self-starting frequency-modulated QCL combs, are discussed.

Low threshold current density distributed feedback quantum cascade lasers with deep top gratings

2006 ◽  
Vol 89 (16) ◽  
pp. 161102 ◽  
Author(s):  
Gangyi Xu ◽  
Aizhen Li ◽  
Yaoyao Li ◽  
Lin Wei ◽  
Yonggang Zhang ◽  
...  
Keyword(s):  
Current Density ◽  
Quantum Cascade Lasers ◽  
Threshold Current ◽  
Threshold Current Density ◽  
Distributed Feedback ◽  
Quantum Cascade ◽  
Low Threshold ◽  
Cascade Lasers

Highly temperature insensitive, low threshold-current density (λ = 8.7–8.8 μm) quantum cascade lasers

2015 ◽  
Vol 106 (15) ◽  
pp. 151106 ◽  
Author(s):  
J. D. Kirch ◽  
C.-C. Chang ◽  
C. Boyle ◽  
L. J. Mawst ◽  
D. Lindberg ◽  
...  
Keyword(s):  
Current Density ◽  
Quantum Cascade Lasers ◽  
Threshold Current ◽  
Threshold Current Density ◽  
Quantum Cascade ◽  
Low Threshold ◽  
Cascade Lasers
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