Study on polarization characteristics of LC-VCSEL arrays by liquid crystal rotation angle

Yan Wen; Xiaoyu Zhang; Wenxuan Ye; Hongzhuo Wang; Baolu Guan

doi:10.1117/12.2690431

17 August 2023 Study on polarization characteristics of LC-VCSEL arrays by liquid crystal rotation angle

Yan Wen, Xiaoyu Zhang, Wenxuan Ye, Hongzhuo Wang, Baolu Guan

Proceedings Volume 12757, 3rd International Conference on Laser, Optics, and Optoelectronic Technology (LOPET 2023); 1275712 (2023) https://doi.org/10.1117/12.2690431
Event: 3rd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2023), 2023, Kunming, China

Abstract

In this paper, the nematic liquid crystal layer is used as the laser polarization control unit, which is integrated on the surface of the vertical-cavity surface-emitting laser (VCSEL) array. The optical power anisotropic loss characteristics of the orthogonal polarized light emitted by the VCSEL array when passing through the nematic liquid crystal with different rotation directions and the resulting impact on the polarization characteristics are measured and analyzed. The experimental results show that the maximum orthogonal polarization suppression ratio (OPSR) of VCSEL array increases from 2.31dB to 5.05dB when the rotation direction of the liquid crystal is adjusted from 45° to 0°, while the 90° rotation can completely eliminate the polarization switching, and obtain a stable output of single polarized light. The experimental results provide a new scheme for VCSEL single unit and array to achieve high quality single polarization output

Citation Download Citation

Yan Wen, Xiaoyu Zhang, Wenxuan Ye, Hongzhuo Wang, and Baolu Guan "Study on polarization characteristics of LC-VCSEL arrays by liquid crystal rotation angle", Proc. SPIE 12757, 3rd International Conference on Laser, Optics, and Optoelectronic Technology (LOPET 2023), 1275712 (17 August 2023); https://doi.org/10.1117/12.2690431

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