The improved output performance of a broad-area vertical-cavity surface-emitting laser with an optimized electrode diameter

doi:10.1088/1674-1056/22/6/064209

Abstract The output performance of 980-nm broad-area vertical-cavity surface-emitting laser (VCSEL) is improved by optimizing the p-electrode diameter in this study. Based on a three-dimensional finite-element method, the current density distribution within the active region of the VCSEL is optimized through the appropriate adjustment of p-electrode diameter, and the uniform current-density distribution is achieved. Then, the effects of this optimization are studied experimentally. The L-I-V characteristics under different temperatures of the VCSELs with different p-electrode diameters are investigated, and a better temperature stability is demonstrated in the VCSEL with optimized p-electrode diameter. The far-field measurements show that with an injected current of 2 A, the far-field divergence angle of the VCSEL with optimized p-electrode diameter is 9°, which is much lower than the far-field angle of the VCSEL without this optimization. Also the VCSEL with optimized p-electrode diameter shows a better near-field distribution.

Keywords: vertical-cavity surface-emitting lasers finite-element analysis far-field divergence near-field distribution

Received: 24 October 2012
Revised: 04 January 2013
Accepted manuscript online:

PACS:

42.55.Px

(Semiconductor lasers; laser diodes)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61204056, 61234004, 90923037, and 11074247) and the Jilin Province Science and Technology Development Plan Item (Grant Nos. 201105025 and 20116011).

Corresponding Authors: Ning Yong-Qiang
E-mail: ningyq@ciomp.ac.cn

Cite this article:

Zhang Xing (张星), Ning Yong-Qiang (宁永强), Qin Li (秦莉), Tong Cun-Zhu (佟存柱), Liu Yun (刘云), Wang Li-Jun (王立军) The improved output performance of a broad-area vertical-cavity surface-emitting laser with an optimized electrode diameter 2013 Chin. Phys. B 22 064209

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The improved output performance of a broad-area vertical-cavity surface-emitting laser with an optimized electrode diameter

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