High-performance multi-junction cascade 1.3â
µm quantum dot vertical cavity surface-emitting laser.
Opt Lett
; 49(6): 1437-1440, 2024 Mar 15.
Article
en En
| MEDLINE
| ID: mdl-38489419
ABSTRACT
A high-performance 5-junction cascade quantum dot (QD) vertical cavity surface-emitting laser (VCSEL) with 1.3â
µm wavelength was designed. The characteristics of the QD as active regions and tunnel junctions are combined to effectively increase output power. The photoelectric characteristics of single-junction, 3-junction cascade, and 5-junction cascade QD VCSELs are compared at continuous-wave conditions. Results indicate that the threshold current gradually decreases, and the output power and slope efficiency exponential increase with the increase of the number of active regions. The peak power conversion efficiency of 58.4% is achieved for the 5-junction cascade individual QD VCSEL emitter with 10â
µm oxide aperture. The maximum slope efficiency of the device is 6.27â
W/A, which is approximately six times than that of the single-junction QD VCSEL. The output power of the 5-junction cascade QD VCSEL reaches 188.13â
mW at injection current 30â
mA. High-performance multi-junction cascade 1.3-µm QD VCSEL provides data and theoretical support for the preparation of epitaxial materials.
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MEDLINE
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En
Revista:
Opt Lett
Año:
2024
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Article