scholarly journals Dense Spectral Beam Combining of Quantum Cascade Lasers by Multiplexing a pair of Blazed Gratings

2021 ◽  
Author(s):  
jun zhang ◽  
Hangyu Peng ◽  
Jingbo Wang ◽  
Jiye Zhang ◽  
Qin li ◽  
...  
Keyword(s):  
Quantum Cascade Lasers ◽  
Quantum Cascade ◽  
Beam Combining ◽  
Spectral Beam Combining ◽  
Cascade Lasers

scholarly journals Spectral beam combining of discrete quantum cascade lasers

2021 ◽  
Vol 53 (10) ◽  
Author(s):  
Zenghui Gu ◽  
Jinchuan Zhang ◽  
Shenqiang Zhai ◽  
Ning Zhuo ◽  
Shuman Liu ◽  
...  
Keyword(s):  
Quantum Cascade Lasers ◽  
Quantum Cascade ◽  
Beam Combining ◽  
Spectral Beam Combining ◽  
Cascade Lasers

Spectral beam combining of quantum cascade lasers in an external cavity

2009 ◽  
Author(s):  
S. Hugger ◽  
F. Fuchs ◽  
Rolf Aidam ◽  
W. Bronner ◽  
R. Loesch ◽  
...  
Keyword(s):  
Quantum Cascade Lasers ◽  
External Cavity ◽  
Quantum Cascade ◽  
Beam Combining ◽  
Spectral Beam Combining ◽  
Cascade Lasers

scholarly journals Spectral beam combining of discrete quantum cascade lasers

2021 ◽  
Author(s):  
Zenghui Gu ◽  
Jinchuan Zhang ◽  
Shenqiang Zhai ◽  
Ning Zhuo ◽  
Shuman Liu ◽  
...  
Keyword(s):  
High Efficiency ◽  
Continuous Wave ◽  
Quantum Cascade Lasers ◽  
Quantum Cascade ◽  
Beam Combining ◽  
Continuous Wave Operation ◽  
Combining Efficiency ◽  
Spectral Beam Combining ◽  
Cascade Lasers ◽  
Theoretical Results

Abstract In this paper, we report a spectral beam combining technique based on discrete quantum cascade lasers at l~ 4.8 mm. Good beam qualities of M 2 < 1.3 for both fast and slow axes are obtained. The entire spectrum span is approximately 29.1 cm -1 , which is consistent with the theoretical results of grating equation. Maximum beam combining efficiency of 58.9% with output power exceeding 1 W is demonstrated under continuous wave operation at room temperature. The limit of beam combining efficiency is theoretically investigated. The independent temperature control for the discrete lasers circumvented the issue of thermal crosstalk between the lasers on an array and pave the way to high power and high efficiency laser spectral beam combining.

scholarly journals Multi-Spectral Quantum Cascade Lasers on Silicon With Integrated Multiplexers

Photonics ◽  
2019 ◽  
Vol 6 (1) ◽  
pp. 6 ◽  
Author(s):  
Eric Stanton ◽  
Alexander Spott ◽  
Jon Peters ◽  
Michael Davenport ◽  
Aditya Malik ◽  
...  
Keyword(s):  
Quantum Cascade Lasers ◽  
Bragg Reflection ◽  
Silicon On Insulator ◽  
Quantum Cascade ◽  
Detection Systems ◽  
Single Output ◽  
Multiple Input ◽  
Spectral Beam Combining ◽  
Midwave Infrared ◽  
Cascade Lasers

Multi-spectral midwave-infrared (mid-IR) lasers are demonstrated by directly bonding quantum cascade epitaxial gain layers to silicon-on-insulator (SOI) waveguides with arrayed waveguide grating (AWG) multiplexers. Arrays of distributed feedback (DFB) and distributed Bragg-reflection (DBR) quantum cascade lasers (QCLs) emitting at ∼4.7 µm wavelength are coupled to AWGs on the same chip. Low-loss spectral beam combining allows for brightness scaling by coupling the light generated by multiple input QCLs into the fundamental mode of a single output waveguide. Promising results are demonstrated and further improvements are in progress. This device can lead to compact and sensitive chemical detection systems using absorption spectroscopy across a broad spectral range in the mid-IR as well as a high-brightness multi-spectral source for power scaling.

scholarly journals Passive coherent beam combining of quantum-cascade lasers with a Dammann grating

2012 ◽  
Author(s):  
Guillaume Bloom ◽  
Christian Larat ◽  
Eric Lallier ◽  
Gaëlle Lehoucq ◽  
Shailendra Bansropun ◽  
...  
Keyword(s):  
Quantum Cascade Lasers ◽  
Coherent Beam ◽  
Coherent Beam Combining ◽  
Quantum Cascade ◽  
Beam Combining ◽  
Cascade Lasers

External-cavity beam combining of 4-channel quantum cascade lasers

2017 ◽  
Vol 85 ◽  
pp. 52-55 ◽  
Author(s):  
Yue Zhao ◽  
Jin-Chuan Zhang ◽  
Yu-Hong Zhou ◽  
Zhi-Wei Jia ◽  
Ning Zhuo ◽  
...  
Keyword(s):  
Quantum Cascade Lasers ◽  
External Cavity ◽  
Quantum Cascade ◽  
Beam Combining ◽  
Cascade Lasers

scholarly journals Passive coherent beam combining of quantum-cascade lasers with a Dammann grating

2011 ◽  
Vol 36 (19) ◽  
pp. 3810 ◽  
Author(s):  
G. Bloom ◽  
C. Larat ◽  
E. Lallier ◽  
G. Lehoucq ◽  
S. Bansropun ◽  
...  
Keyword(s):  
Quantum Cascade Lasers ◽  
Coherent Beam ◽  
Coherent Beam Combining ◽  
Quantum Cascade ◽  
Beam Combining ◽  
Cascade Lasers
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