Chirped distributed Bragg reflector for broad-band group velocity dispersion compensation in terahertz quantum cascade lasers

2016 ◽  
Author(s):  
C. Xu ◽  
D. Ban
Keyword(s):  
Velocity Dispersion ◽  
Quantum Cascade Lasers ◽  
Group Velocity Dispersion ◽  
Dispersion Compensation ◽  
Broad Band ◽  
Bragg Reflector ◽  
Distributed Bragg Reflector ◽  
Quantum Cascade ◽  
Band Group ◽  
Cascade Lasers

scholarly journals Single mode quantum cascade lasers with shallow-etched distributed Bragg reflector

2012 ◽  
Vol 20 (4) ◽  
pp. 3890 ◽  
Author(s):  
Peter Fuchs ◽  
Jochen Friedl ◽  
Sven Höfling ◽  
Johannes Koeth ◽  
Alfred Forchel ◽  
...  
Keyword(s):  
Quantum Cascade Lasers ◽  
Single Mode ◽  
Bragg Reflector ◽  
Distributed Bragg Reflector ◽  
Quantum Cascade ◽  
Cascade Lasers

Time-domain measurements of group-velocity dispersion in quantum cascade lasers

2008 ◽  
Author(s):  
Hyunyong Choi ◽  
Theodore B. Norris ◽  
Laurent Diehl ◽  
Federico Capasso ◽  
David Bour ◽  
...  
Keyword(s):  
Group Velocity ◽  
Time Domain ◽  
Velocity Dispersion ◽  
Quantum Cascade Lasers ◽  
Group Velocity Dispersion ◽  
Quantum Cascade ◽  
Cascade Lasers

scholarly journals Wavelength selection and spectral narrowing of distributed Bragg reflector quantum cascade lasers up to peak optical power

2013 ◽  
Vol 21 (25) ◽  
pp. 31012 ◽  
Author(s):  
Arash Sadeghi ◽  
Peter Q. Liu ◽  
Xiaojun Wang ◽  
Jenyu Fan ◽  
Mariano Troccoli ◽  
...  
Keyword(s):  
Quantum Cascade Lasers ◽  
Optical Power ◽  
Bragg Reflector ◽  
Wavelength Selection ◽  
Distributed Bragg Reflector ◽  
Quantum Cascade ◽  
Spectral Narrowing ◽  
Cascade Lasers

scholarly journals Anomalous Mode Transitions in High Power Distributed Bragg Reflector Quantum Cascade Lasers

2019 ◽  
Vol 14 (1) ◽  
Author(s):  
Feng-Min Cheng ◽  
Jin-Chuan Zhang ◽  
Zeng-hui Gu ◽  
Dong-Bo Wang ◽  
Ning Zhuo ◽  
...  
Keyword(s):  
Spectral Data ◽  
Continuous Wave ◽  
Quantum Cascade Lasers ◽  
Longitudinal Mode ◽  
Injection Current ◽  
Bragg Reflector ◽  
Distributed Bragg Reflector ◽  
Quantum Cascade ◽  
Mode Transitions ◽  
Cascade Lasers

Abstract In this paper, an anomalous spectral data of distributed Bragg reflector (DBR) quantum cascade lasers (QCLs) emitting around 7.6 μm is presented. The two-section DBR lasers, consisting of a gain section and an unpumped Bragg reflector, display an output power above 0.6 W in continuous wave (CW) mode at room temperature. The anomalous spectral data is defined as a longitudinal mode which moves toward shorter wavelengths with increasing temperature or injection current, which is unexpected. Although the longer wavelength modes are expected to start lasing when raising device temperature or injection current, occasional mode hops to a shorter wavelength are seen. These anomalous mode transitions are explained by means of modal analysis. The thermal-induced change of the refractive index implied by an increase in the temperature or injection current yields nearly periodic transitions between cavity modes.

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