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

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

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.

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.

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