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Jincong Xie

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Proceedings Article | 13 December 2024 Paper

Design and performance analysis of strain-compensated quantum wells for 1654nm VCSELs

Wanxian Xu, Hui Li, Jian Feng, Jincong Xie

Proceedings Volume 13499, 134990M (2024) https://doi.org/10.1117/12.3047650

KEYWORDS: Quantum wells, Vertical cavity surface emitting lasers, Materials properties, Design, Methane

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This paper presents a comprehensive study on the properties of strain-compensated In_1-x-yGa_xAl_yAs/In_1-x-yGa_xAl_yAs quantum wells matched in InP substrate for 1654nm VCSELs. The physical properties of In_1-x-yGa_xAl_yAs/In_1-x-yGa_xAl_yAs quantum wells are studied. We executed an in-depth study concerning the gain characteristics of different quantum well structures for 1654nm VCSELs, then candidate quantum well combinations are obtained. In addition, the gain-carrier properties of the selected quantum wells are also studied. The results show that the quantum well structure, In_0.749Ga_0.205Al_0.046As/In_0.42Ga_0.43Al_0.15As quantum well of 6nm, is more suitable for 1654nm VCSELs due to its properties: larger band-gap offset, higher material gain, low transparency carrier density and higher differential gain. The VCSELs with it would have better photoelectric properties. This study provides valuable insights for optimizing active region of VCSELs suitable for 1654nm methane detection and improving device performance.

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