scholarly journals Self-consistent solutions to the intersubband rate equations in quantum cascade lasers: Analysis of a GaAs/AlxGa1−xAs device

2001 ◽  
Vol 89 (6) ◽  
pp. 3084-3090 ◽  
Author(s):  
K. Donovan ◽  
P. Harrison ◽  
R. W. Kelsall
Keyword(s):  
Quantum Cascade Lasers ◽  
Rate Equations ◽  
Quantum Cascade ◽  
Self Consistent ◽  
Cascade Lasers

scholarly journals Self-consistent theory of the gain linewidth for quantum-cascade lasers

2005 ◽  
Vol 86 (4) ◽  
pp. 041108 ◽  
Author(s):  
F. Banit ◽  
S.-C. Lee ◽  
A. Knorr ◽  
A. Wacker
Keyword(s):  
Quantum Cascade Lasers ◽  
Consistent Theory ◽  
Quantum Cascade ◽  
Self Consistent ◽  
Cascade Lasers

Rate equations analysis of external-cavity quantum cascade lasers

2010 ◽  
Vol 107 (4) ◽  
pp. 043109 ◽  
Author(s):  
Q. K. Yang ◽  
B. Hinkov ◽  
F. Fuchs ◽  
W. Bronner ◽  
K. Köhler ◽  
...  
Keyword(s):  
Quantum Cascade Lasers ◽  
External Cavity ◽  
Rate Equations ◽  
Quantum Cascade ◽  
Cascade Lasers

scholarly journals Optimizing optical nonlinearities in GaInAs/AlInAs quantum cascade lasers

2014 ◽  
Vol 29 (1) ◽  
pp. 10-16 ◽  
Author(s):  
Aleksandra Gajic ◽  
Jelena Radovanovic ◽  
Vitomir Milanovic ◽  
Dragan Indjin ◽  
Zoran Ikonic
Keyword(s):  
Carrier Transport ◽  
Quantum Cascade Lasers ◽  
Second Harmonic ◽  
Photon Absorption ◽  
Rate Equations ◽  
Photon Density ◽  
Electromagnetic Spectrum ◽  
Optical Nonlinearities ◽  
Quantum Cascade ◽  
Cascade Lasers

Regardless of the huge advances made in the design and fabrication of mid-infrared and terahertz quantum cascade lasers, success in accessing the ~3-4 mm region of the electromagnetic spectrum has remained limited. This fact has brought about the need to exploit resonant intersubband transitions as powerful nonlinear oscillators, consequently enabling the occurrence of large nonlinear optical susceptibilities as a means of reaching desired wavelengths. In this work, we present a computational model developed for the optimization of second-order optical nonlinearities in In0.53Ga0.47As/Al0.48In0.52As quantum cascade laser structures based on the implementation of the Genetic algorithm. The carrier transport and the power output of the structure were calculated by self-consistent solutions to the system of rate equations for carriers and photons. Both stimulated and simultaneous double-photon absorption processes occurring between the second harmonic generation-relevant levels are incorporated into rate equations and the material-dependent effective mass and band non-parabolicity are taken into account, as well. The developed method is quite general and can be applied to any higher order effect which requires the inclusion of the photon density equation.

scholarly journals Synchronization of Mutually Delay-Coupled Quantum Cascade Lasers with Distinct Pump Strengths

Photonics ◽  
2019 ◽  
Vol 6 (4) ◽  
pp. 125 ◽  
Author(s):  
Thomas Erneux ◽  
Daan Lenstra
Keyword(s):  
Critical Power ◽  
Quantum Cascade Lasers ◽  
Rate Equations ◽  
Coupling Constant ◽  
Small Frequency ◽  
Electrical Fields ◽  
Quantum Cascade ◽  
Dependent Variables ◽  
Delay Differential ◽  
Cascade Lasers

The rate equations for two delay-coupled quantum cascade lasers are investigated analytically in the limit of weak coupling and small frequency detuning. We mathematically derive two coupled Adler delay differential equations for the phases of the two electrical fields and show that these equations are no longer valid if the ratio of the two pump parameters is below a critical power of the coupling constant. We analyze this particular case and derive new equations for a single optically injected laser where the delay is no longer present in the arguments of the dependent variables. Our analysis is motivated by the observations of Bogris et al. (IEEE J. Sel. Top. Quant. El. 23, 1500107 (2017)), who found better sensing performance using two coupled quantum cascade lasers when one laser was operating close to the threshold.

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