A robust electro-optothermal coupling scheme for semiconductor laser simulation

Santschi, Rafael; Meier, Hektor; Odermatt, Stefan

doi:10.1117/12.758933

Cited by 1 publication

(1 citation statement)

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“…However, the filter aperture cannot actually solve the problem of nonuniform current-density distribution. There have been many other studies on the current injection of VC-SEL devices, such as investigating the relationship between current injection and wall-plug efficiency [16,17] or the thermal behavior [18][19][20] of VCSEL devices. However, how to eliminate the CSD effect was not mentioned in those studies.…”

Section: Introductionmentioning

confidence: 99%

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

Zhang¹,

Qin²,

Tong³

et al. 2013

Chinese Phys. B

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The output performance of a 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 the p-electrode diameter, and 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 better temperature stability is demonstrated in the VCSEL with an 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 an 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 an optimized p-electrode diameter shows a better near-field distribution.

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