Measurement of the linewidth enhancement factor of quantum cascade lasers by the self-mixing technique

2006 ◽  
Author(s):  
Jens von Staden ◽  
Tobias Gensty ◽  
Michael Peil ◽  
Wolfgang Elsäßer ◽  
Guido Giuliani ◽  
...  
Keyword(s):  
Enhancement Factor ◽  
Quantum Cascade Lasers ◽  
The Self ◽  
Linewidth Enhancement Factor ◽  
Quantum Cascade ◽  
Linewidth Enhancement ◽  
Cascade Lasers

Linewidth Enhancement Factor of Mid-IR Quantum Cascade Lasers

2021 ◽  
Author(s):  
Mathieu Bertrand ◽  
Martin Franckie ◽  
Andres Forrer ◽  
Filippos Kapsalidis ◽  
Mattias Beck ◽  
...  
Keyword(s):  
Enhancement Factor ◽  
Quantum Cascade Lasers ◽  
Linewidth Enhancement Factor ◽  
Quantum Cascade ◽  
Linewidth Enhancement ◽  
Cascade Lasers

Linewidth Enhancement Factor and Amplification of Angle-Modulated Optical Signals in Injection-Locked Quantum Cascade Lasers

2016 ◽  
Vol 37 (1) ◽  
Author(s):  
Taraprasad Chattopadhyay ◽  
Prosenjit Bhattacharyya
Keyword(s):  
Enhancement Factor ◽  
Quantum Cascade Lasers ◽  
Modulation Frequency ◽  
Power Level ◽  
Optical Signals ◽  
Linewidth Enhancement Factor ◽  
Quantum Cascade ◽  
Injection Power ◽  
Linewidth Enhancement ◽  
Cascade Lasers

AbstractThis paper presents a nonlinear analysis of the effect of linewidth enhancement factor (LEF) on the amplification of angle-modulated optical signals in injection-locked mid-infrared (IR) quantum cascade lasers (QCLs). A higher value of LEF tends to conserve the output angle modulation index of the amplified mid-IR signal particularly in the low-modulation frequency region. Further, a higher value of signal injection ratio produces a wider bandwidth of the locked QCL amplifier. The LEF introduces asymmetry in the lockband (LB) of the injection-locked QCL and this asymmetry increases with the increase in the value of LEF. Typically ratio of calculated lower-side LB to upper-side LB for an injection power level of – 20 dB and a LEF of unity is 1.67. The electron relaxation time in the uppermost subband lasing level in a three-level system has a profound effect on the LB asymmetry in a QCL.

Linewidth enhancement factor of terahertz quantum cascade lasers

2008 ◽  
Vol 92 (7) ◽  
pp. 071106 ◽  
Author(s):  
Richard P. Green ◽  
Ji-Hua Xu ◽  
Lukas Mahler ◽  
Alessandro Tredicucci ◽  
Fabio Beltram ◽  
...  
Keyword(s):  
Enhancement Factor ◽  
Quantum Cascade Lasers ◽  
Linewidth Enhancement Factor ◽  
Quantum Cascade ◽  
Linewidth Enhancement ◽  
Cascade Lasers

First Direct Observation of Small Linewidth Enhancement Factor of Fabry–Perot Quantum Cascade Laser

2008 ◽  
Vol 47 (3) ◽  
pp. 1606-1608 ◽  
Author(s):  
Naoki Kumazaki ◽  
Yohei Takagi ◽  
Mikito Ishihara ◽  
Kenichi Kasahara ◽  
Naota Akikusa ◽  
...  
Keyword(s):  
Direct Observation ◽  
Quantum Cascade Laser ◽  
Enhancement Factor ◽  
Linewidth Enhancement Factor ◽  
Quantum Cascade ◽  
Fabry Perot ◽  
Linewidth Enhancement

Linewidth enhancement factor of a type-I quantum-cascade laser

2003 ◽  
Vol 94 (8) ◽  
pp. 5426 ◽  
Author(s):  
M. Lerttamrab ◽  
S. L. Chuang ◽  
C. Gmachl ◽  
D. L. Sivco ◽  
F. Capasso ◽  
...  
Keyword(s):  
Quantum Cascade Laser ◽  
Enhancement Factor ◽  
Type I ◽  
Linewidth Enhancement Factor ◽  
Quantum Cascade ◽  
Linewidth Enhancement
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