scholarly journals Особенности одночастотной генерации в квантово-каскадных лазерах спектрального диапазона 7.5-8.0 μm с малой длиной резонатора

2022 ◽  
Vol 48 (5) ◽  
pp. 7
Author(s):  
А.В. Бабичев ◽  
Е.С. Колодезный ◽  
А.Г. Гладышев ◽  
Д.В. Денисов ◽  
Н.Ю. Харин ◽  
...  
Keyword(s):  
Quantum Cascade Lasers ◽  
Single Mode ◽  
Threshold Current ◽  
Wavelength Shift ◽  
Quantum Cascade ◽  
Mode Suppression ◽  
Fabry Perot ◽  
Lasing Regime ◽  
Temperature Tuning ◽  
Cascade Lasers

The possibility of realizing single-mode emission in quantum-cascade lasers due to modulation of output optical losses in a Fabry-Perot cavity is demonstrated. For the active region of the 7.5–8.0 μm spectral range, two-phonon resonance design we used thus the 50 stages and waveguide layers based on indium phosphide made it possible to realize single-mode lasing at 7.765 μm and at temperature of 292 K. Side-mode suppression ratio was about 24 dB and remained the same with an increase in the current pumping up to 1.2 of the threshold current values. The coefficient of wavelength shift with temperature (temperature tuning) in the single-mode lasing regime was 0.56 nm / K.

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.

scholarly journals Erratum: “Single-mode quantum cascade lasers based on a folded Fabry–Perot cavity” [Appl. Phys. Lett. 98, 061110 (2011)]

2011 ◽  
Vol 98 (11) ◽  
pp. 119901
Author(s):  
Peter Q. Liu ◽  
Xiaojun Wang ◽  
Jen-Yu Fan ◽  
Claire F. Gmachl
Keyword(s):  
Quantum Cascade Lasers ◽  
Single Mode ◽  
Quantum Cascade ◽  
Fabry Perot ◽  
Cascade Lasers

Widely tunable single-mode quantum cascade lasers with two monolithically coupled Fabry-Pérot cavities

2006 ◽  
Vol 89 (24) ◽  
pp. 241126 ◽  
Author(s):  
S. Höfling ◽  
J. Heinrich ◽  
J. P. Reithmaier ◽  
A. Forchel ◽  
J. Seufert ◽  
...  
Keyword(s):  
Quantum Cascade Lasers ◽  
Single Mode ◽  
Quantum Cascade ◽  
Fabry Perot ◽  
Cascade Lasers

Single-mode quantum cascade lasers based on a folded Fabry-Perot cavity

2011 ◽  
Vol 98 (6) ◽  
pp. 061110 ◽  
Author(s):  
Peter Q. Liu ◽  
Xiaojun Wang ◽  
Jen-Yu Fan ◽  
Claire F. Gmachl
Keyword(s):  
Quantum Cascade Lasers ◽  
Single Mode ◽  
Quantum Cascade ◽  
Fabry Perot ◽  
Cascade Lasers

Electrically Pumped Photonic Crystal Distributed Feedback Quantum Cascade Lasers

2008 ◽  
Vol 1076 ◽  
Author(s):  
Manijeh Razeghi ◽  
Yanbo Bai ◽  
Steven Slivken ◽  
Wei Zhang
Keyword(s):  
Photonic Crystal ◽  
Quantum Cascade Lasers ◽  
Single Mode ◽  
Distributed Feedback ◽  
Broad Area ◽  
Quantum Cascade ◽  
Mode Operation ◽  
Fabry Perot ◽  
Electrically Pumped ◽  
Cascade Lasers

ABSTRACTIn parallel with the effort to improve the efficiency of Quantum cascade lasers (QCL) for high power continuous wave (CW) operations, the peak power in pulsed mode operation can be easily scaled up with larger emitting volumes, i.e., processing QCLs into broad area lasers. However, as the emitter width increases, multi-mode operation happens due to poorer lateral mode distinguishability. By putting a two dimensional photonic crystal distributed feedback (PCDFB) layer evanescently coupled to the main optical mode, both longitudinal and lateral beam coherence can be greatly enhanced, which makes single mode operation possible for broad area devices. For PCDFB laser performance, the linewidth enhancement factor (LEF) plays an important role in controlling the optical coherence. Being intersubband devices, QCLs have an intrinsically small LEF, thus serves better candidates over interband lasers for PCDFB applications. We demonstrate electrically pumped, room temperature, single mode operation of photonic crystal distributed feedback quantum cascade lasers emitting at λ ∼ 4.75 μm. Ridge waveguides of 50 μm and 100 μm width were fabricated with both PCDFB and Fabry-Perot feedback mechanisms. The Fabry-Perot device has a broad emitting spectrum and a broad far-field character. The PCDFB devices have primarily a single spectral mode and a diffraction limited far field characteristic with a full angular width at half-maximum of 4.8 degrees and 2.4 degrees for the 50 μm and 100 μm ridge widths, respectively.

scholarly journals Исследование спектров генерации арочных квантово-каскадных лазеров

2020 ◽  
Vol 128 (6) ◽  
pp. 696
Author(s):  
А.В. Бабичев ◽  
Д.А. Пашнев ◽  
Д.В. Денисов ◽  
А.Г. Гладышев ◽  
Ю.К. Бобрецова ◽  
...  
Keyword(s):  
Molecular Beam ◽  
Quantum Cascade Lasers ◽  
Single Mode ◽  
Lasing Wavelength ◽  
Quantum Cascade ◽  
Mode Suppression ◽  
Ring Diameter ◽  
Solid Alloys ◽  
Cascade Lasers ◽  
Side Mode

The results of studying the temperature characteristics of arched quantum-cascade lasers of 7-8 μm spectral range with different geometric sizes are presented. Laser heterostructure was grown by molecular beam epitaxy. The active region consisted of 50 cascades based on heteropairs of solid alloys In0.53Ga0.47As/Al0.48In0.52As. Single-mode lasing was demonstrated for lasers with a half-ring diameter of 100 μm and a length of linear section of 1 mm. The maximum side-mode suppression ratio at a temperature of 290 K was 26 dB, the lasing wavelength was 7.73 μm.

scholarly journals Одночастотная генерация арочных квантово-каскадных лазеров при комнатной температуре

2019 ◽  
Vol 45 (8) ◽  
pp. 31
Author(s):  
А.В. Бабичев ◽  
А.Г. Гладышев ◽  
А.С. Курочкин ◽  
В.В. Дюделев ◽  
Е.С. Колодезный ◽  
...  
Keyword(s):  
Quantum Cascade Lasers ◽  
Optical Power ◽  
Single Mode ◽  
Lasing Wavelength ◽  
Mode Suppression ◽  
Inp Substrate ◽  
Lasing Regime ◽  
Cavity Design ◽  
Solid Alloys ◽  
Cascade Lasers

AbstractSingle-mode lasing at room temperature in quantum-cascade lasers (QCLs) with arched cavity design has been demonstrated. The output optical power in single-mode lasing regime at ~7.7-μm lasing wavelength was above 6 mW with a side-mode suppression ratio of up to 25 dB. The QCL heterostructure for the arched cavities was grown by molecular-beam epitaxy (MBE) based on a heterojunction of In_0.53Ga_0.47As/Al_0.48In_0.52As solid alloys, lattice-matched with InP substrate, and InP layers performing the function of waveguide claddings.

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