Stably polarized 795 nm vertical-cavity surface-emitting lasers with anti-phase SiNx surface gratings

795 nm vertical-cavity surface-emitting lasers (VCSELs) with dielectric surface gratings to control the output polarization are designed and fabricated. The calculated results demonstrate that a well-designed SiNx surface grating positioned on the surface of an anti-phase VCSEL structure enhances th...

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Bibliographic Details
Published in:Applied optics (2004) 2024-05, Vol.63 (14), p.3998
Main Authors: Fu, Qiuxue, Sun, Yurun, Yu, Shuzhen, Qiu, Bocang, Zhao, Yongmin, Dong, Jianrong
Format: Article
Language:English
Subjects:
Anisotropy
Vertical cavity surface emission lasers
Vertical polarization
Online Access:Get full text
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Summary:795 nm vertical-cavity surface-emitting lasers (VCSELs) with dielectric surface gratings to control the output polarization are designed and fabricated. The calculated results demonstrate that a well-designed SiNx surface grating positioned on the surface of an anti-phase VCSEL structure enhances the reflectivity difference between the two polarization modes compared to a conventional GaAs surface grating, consequently resulting in a larger gain anisotropy in VCSELs and a high orthogonal polarization suppression ratio (OPSR). Characterization shows that a peak-to-peak OPSR of 30.3 dB is achieved at 85°C for 795 nm VCSELs with a SiNx surface grating of 5 µm in diameter and an oxide aperture of ∼4µm, demonstrating the effectiveness of the SiNx surface grating in polarization control for 795 nm VCSELs.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.524882