Single-mode quantum cascade lasers employing a candy-cane shaped monolithic coupled cavity

2011 ◽  
Vol 99 (24) ◽  
pp. 241112 ◽  
Author(s):  
Peter Q. Liu ◽  
Kamil Sladek ◽  
Xiaojun Wang ◽  
Jen-Yu Fan ◽  
Claire F. Gmachl
Keyword(s):  
Quantum Cascade Lasers ◽  
Single Mode ◽  
Quantum Cascade ◽  
Cascade Lasers ◽  
Coupled Cavity

scholarly journals Coupled-cavity terahertz quantum cascade lasers for single mode operation

2014 ◽  
Vol 104 (24) ◽  
pp. 241102 ◽  
Author(s):  
H. Li ◽  
J. M. Manceau ◽  
A. Andronico ◽  
V. Jagtap ◽  
C. Sirtori ◽  
...  
Keyword(s):  
Quantum Cascade Lasers ◽  
Single Mode ◽  
Single Mode Operation ◽  
Quantum Cascade ◽  
Mode Operation ◽  
Cascade Lasers ◽  
Coupled Cavity

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.

Single-mode enhancement in coupled-cavity quantum cascade lasers

2016 ◽  
Author(s):  
M. Kuc ◽  
R. P. Sarzała ◽  
T. Czyszanowski ◽  
M. Bugajski
Keyword(s):  
Quantum Cascade Lasers ◽  
Single Mode ◽  
Quantum Cascade ◽  
Cascade Lasers ◽  
Coupled Cavity

scholarly journals Coupled Cavity Mid-IR Quantum Cascade Lasers Fabricated by Dry Etching

Photonics ◽  
2020 ◽  
Vol 7 (3) ◽  
pp. 45
Author(s):  
Kamil Pierściński ◽  
Dorota Pierścińska ◽  
Aleksandr Kuźmicz ◽  
Grzegorz Sobczak ◽  
Maciej Bugajski ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
Quantum Cascade Lasers ◽  
Single Mode ◽  
Quantum Cascade ◽  
Inductively Coupled ◽  
Detection Systems ◽  
Mode Suppression ◽  
Cascade Lasers ◽  
Coupled Cavity ◽  
Better Than

In this work, two-section, coupled cavity, mid-IR quantum cascade lasers (QCLs) were characterized in terms of their tuning range and emission stability under operation towards potential application in detection systems. Devices were processed by inductively coupled plasma reactive ion etching (ICP-RIE) from InP-based heterostructure, designed for emission in the 9.x micrometer range. Single mode devices were demonstrated with a better than 20 dB side mode suppression ratio (SMRS). The fabrication method resulted in improved yield, as well as high repeatability of individual devices. Continuous, mode-hop-free tuning of emission wavelength was observed across ~4.5 cm−1 for the range of temperatures of the heat sink from 15 °C to 70 °C. Using the thermal perturbation in the lasing cavity, in conjunction with controlled hopping between coupled-cavity (CC) modes, we were able to accomplish tuning over the range of up to ~20 cm−1.

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.

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