Electro-optical transient response study of pulsed VCSEL arrays

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

doi:10.1117/12.2690711

17 August 2023 Electro-optical transient response study of pulsed VCSEL arrays

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

Proceedings Volume 12757, 3rd International Conference on Laser, Optics, and Optoelectronic Technology (LOPET 2023); 1275716 (2023) https://doi.org/10.1117/12.2690711
Event: 3rd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2023), 2023, Kunming, China

Abstract

Vertical cavity surface emitting laser (VCSEL) array is the important laser source in LiDAR ranging systems (LiDAR). The VCSEL array have important effects on the electro-optical transient response characteristics and power density for time-of-flight ToF ranging technology. In this study, by using the carrier-photon coupling equation of semiconductor lasers, we established a Simulink model of the rate equation of pulsed VCSEL arrays, an equivalent circuit model and a heat dissipation model of VCSELs. We analyzed the factors affecting the electro-optical transient response of pulsed VCSEL arrays theoretically. Then we verified the result experimentally. In this paper, the effects of array size and spurious parameters on the electro-optical delay time and optical pulse rise time of VCSEL arrays are discussed. Both simulation and experimental results show that the rise time of the VCSEL array decreases and then increases as the size of the array increases in the narrow pulse driving circuit. This provides a light source optimization scheme for the application of VCSEL arrays in LiDAR ranging systems (LiDAR). It also provides a theoretical basis for the in-depth study of VCSEL arrays under pulse driving.

Citation Download Citation

Wenxuan Ye, Xiaoyu Zhang, Yan Wen, Yudong Liu, Hongzhuo Wang, and Baolu Guan "Electro-optical transient response study of pulsed VCSEL arrays", Proc. SPIE 12757, 3rd International Conference on Laser, Optics, and Optoelectronic Technology (LOPET 2023), 1275716 (17 August 2023); https://doi.org/10.1117/12.2690711

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