Single-mode operation of terahertz quantum cascade lasers with distributed feedback resonators

2004 ◽  
Vol 84 (26) ◽  
pp. 5446-5448 ◽  
Author(s):  
Lukas Mahler ◽  
Rüdeger Köhler ◽  
Alessandro Tredicucci ◽  
Fabio Beltram ◽  
Harvey E. Beere ◽  
...  
Keyword(s):  
Quantum Cascade Lasers ◽  
Single Mode ◽  
Distributed Feedback ◽  
Single Mode Operation ◽  
Quantum Cascade ◽  
Mode Operation ◽  
Cascade Lasers

Stable single mode operation of quantum cascade lasers by complex-coupled second-order distributed feedback grating

2015 ◽  
Vol 103 ◽  
pp. 79-82
Author(s):  
Yinghui Liu ◽  
Jinchuan Zhang ◽  
Zhiwei Jia ◽  
Danyang Yao ◽  
Fangliang Yan ◽  
...  
Keyword(s):  
Quantum Cascade Lasers ◽  
Single Mode ◽  
Second Order ◽  
Distributed Feedback ◽  
Single Mode Operation ◽  
Quantum Cascade ◽  
Mode Operation ◽  
Cascade Lasers

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

Single-mode operation of terahertz quantum cascade lasers

2011 ◽  
Author(s):  
J. Y. Chen ◽  
J. Q. Liu ◽  
F. Q. Liu ◽  
L. Li ◽  
L. J. Wang ◽  
...  
Keyword(s):  
Quantum Cascade Lasers ◽  
Single Mode ◽  
Single Mode Operation ◽  
Quantum Cascade ◽  
Mode Operation ◽  
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.

Single-mode, tunable distributed-feedback and multiple-wavelength quantum cascade lasers

2002 ◽  
Vol 38 (6) ◽  
pp. 569-581 ◽  
Author(s):  
C. Gmachl ◽  
A. Straub ◽  
R. Colombelli ◽  
F. Capasso ◽  
D.L. Sivco ◽  
...  
Keyword(s):  
Quantum Cascade Lasers ◽  
Single Mode ◽  
Distributed Feedback ◽  
Quantum Cascade ◽  
Multiple Wavelength ◽  
Cascade Lasers
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