scholarly journals Continuous tuning of two-section, single-mode terahertz quantum-cascade lasers by fiber-coupled, near-infrared illumination

AIP Advances ◽  
2017 ◽  
Vol 7 (5) ◽  
pp. 055201 ◽  
Author(s):  
Martin Hempel ◽  
Benjamin Röben ◽  
Michael Niehle ◽  
Lutz Schrottke ◽  
Achim Trampert ◽  
...  
Keyword(s):  
Near Infrared ◽  
Quantum Cascade Lasers ◽  
Single Mode ◽  
Quantum Cascade ◽  
Continuous Tuning ◽  
Cascade Lasers

scholarly journals Publisher’s Note: “Continuous tuning of two-section, single-mode terahertz quantum-cascade lasers by fiber-coupled, near-infrared illumination” [AIP Advances 7, 055201 (2017)]

AIP Advances ◽  
2017 ◽  
Vol 7 (5) ◽  
pp. 059903 ◽  
Author(s):  
Martin Hempel ◽  
Benjamin Röben ◽  
Michael Niehle ◽  
Lutz Schrottke ◽  
Achim Trampert ◽  
...  
Keyword(s):  
Near Infrared ◽  
Quantum Cascade Lasers ◽  
Single Mode ◽  
Quantum Cascade ◽  
Continuous Tuning ◽  
Cascade Lasers

scholarly journals Monolithic, Optically Coupled, Multi-Section Mid-IR Quantum Cascade Lasers

Photonics ◽  
2021 ◽  
Vol 8 (12) ◽  
pp. 583
Author(s):  
Kamil Pierściński ◽  
Dorota Pierścińska ◽  
Grzegorz Sobczak ◽  
Aleksandr Kuźmicz ◽  
Krzysztof Chmielewski ◽  
...  
Keyword(s):  
Quantum Cascade Lasers ◽  
Single Mode ◽  
Wavelength Shift ◽  
Time Resolved ◽  
Design Modification ◽  
Quantum Cascade ◽  
Continuous Tuning ◽  
Wide Range ◽  
Cascade Lasers ◽  
Coupled Cavity

Mid-infrared (mid-IR λ ≈ 3–12 μm), single-mode-emission Quantum Cascade Lasers (QCLs) are of significant interest for a wide range of applications, especially as the laser sources are chosen for laser absorption spectroscopy. In this work, we present the design, fabrication and characterization of multi-section, coupled-cavity, mid-IR quantum cascade lasers. The purpose of this work is to propose a design modification for a coupled-cavity device, yielding a single-mode emission with a longer range of continuous tuning during the pulse, in contrast to a 2-section device. This effect was obtained and demonstrated in the work. The proposed design of a 3-section coupled-cavity QCL allows for a single-mode emission with 35 dB side-mode suppression ratio. Additionally, the time-resolved spectra of the wavelength shift during pulse operation, show a continuous tuning of ~3 cm−1 during the 2 μs pulse. The devices were fabricated in a slightly modified, standard laser process using dry etching.

Room-temperature continuous-wave single-mode quantum cascade lasers

2006 ◽  
Author(s):  
Stéphane Blaser ◽  
Lubos Hvozdara ◽  
Yargo Bonetti ◽  
Antoine Muller ◽  
Andreas Bächle ◽  
...  
Keyword(s):  
Room Temperature ◽  
Continuous Wave ◽  
Quantum Cascade Lasers ◽  
Single Mode ◽  
Quantum Cascade ◽  
Cascade Lasers

Processing of deeply etched GaAs/AlGaAs quantum cascade lasers with grating structures

2004 ◽  
Vol 829 ◽  
Author(s):  
S. Golka ◽  
M. Austerer ◽  
C. Pflügl ◽  
W. Schrenk ◽  
G. Strasser
Keyword(s):  
Coupling Coefficient ◽  
Inductively Coupled Plasma ◽  
Quantum Cascade Lasers ◽  
Single Mode ◽  
Mid Infrared ◽  
Quantum Cascade ◽  
Inductively Coupled ◽  
Icp Etching ◽  
Grating Coupling ◽  
Cascade Lasers

ABSTRACTGratings in GaAs/AlGaAs mid-infrared quantum cascade lasers (QCLs) are fabricated with a structure depth of more than 10 μm. A N2/SiCl4 inductively coupled plasma reactive ion etching (ICP-RIE) process was employed to achieve extremely smooth sidewalls and selectivities to the SiNX etch mask of up to 70:1. EDX spectra measured on as-etched samples show that sidewall etch inhibition is caused by a thin Si containing layer on the sidewalls that is formed simultaneously with ICP etching of GaAs at the bottom of the trenches. To demonstrate device application gratings with a pitch of 1.72 μm are applied to long rib waveguide -based QCLs emitting at λ = 10.7 μm. When etched laterally together with the rib the grating gives rise to stable single mode emission up to 295K from these QCLs. The respective grating coupling coefficient is determined to be κ = 29 cm-1.

scholarly journals Low-dissipation 74-µm single-mode quantum cascade lasers without epitaxial regrowth

2016 ◽  
Vol 24 (13) ◽  
pp. 14589 ◽  
Author(s):  
Ryan M. Briggs ◽  
Clifford Frez ◽  
Mathieu Fradet ◽  
Siamak Forouhar ◽  
Romain Blanchard ◽  
...  
Keyword(s):  
Quantum Cascade Lasers ◽  
Single Mode ◽  
Quantum Cascade ◽  
Epitaxial Regrowth ◽  
Low Dissipation ◽  
Cascade Lasers
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