High-power phase-locked quantum cascade laser array emitting at λ ∼ 4.6 μm

Journal Article · Tue Mar 15 00:00:00 EDT 2016 · AIP Advances

DOI:https://doi.org/10.1063/1.4945383· OSTI ID:22611587

Yan, Fang-Liang; Zhang, Jin-Chuan; Jia, Zhi-Wei; Zhuo, Ning; Zhai, Shen-Qiang; Liu, Shu-Man; Liu, Feng-Qi; Wang, Zhan-Guo ^[1]

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1. Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices, P.O. Box 912, Beijing 100083 (China)

A phase-locked quantum cascade laser (QCL) array consisting of one hundred elements that were integrated in parallel was achieved at λ ∼ 4.6 μm. The proposed Fraunhofer’s multiple slits diffraction model predicted and explained the far-field pattern of the phase-locked laser array. A single-lobed far-field pattern, attributed to the emission of an in-phase-like supermode, is obtained near the threshold (I{sub th}). Even at 1.5 I{sub th}, greater than 73.3% of the laser output power is concentrated in a low-divergence beam with an optical power of up to 40 W.

• OSTI ID: 22611587
• Journal Information: AIP Advances, Vol. 6, Issue 3; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BEAMS
DIFFRACTION
DIFFRACTION MODELS
EMISSION
LASER MATERIALS
LASERS