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Virtual line light source-based beam collimation for pulse-driven Gaussian-like VCSEL array emission
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DOI：10.1016/j.optlaseng.2025.108970.png)
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Abstract
En 中文
In this research we proposed a pulse-driven VCSEL array collimation model, termed the Virtual Line Light Source, designed for beam shaping extended Gaussian-like sources with a single lens. The technique employed for determining the lens surface area involved the utilization of a multi-channel peak-hold circuitry for measurement. The diameter of the lens was precisely regulated by the coordinates of the initial reference points. Virtual line source ray tracing simulated the target's spot size and intensity. MATLAB computations, corroborated by ZEMAX validations, demonstrated a 15 % reduction in the divergence angle compared to the Simultaneous Multiple Surface method. The model also achieved a 0.6 m x 0.6 m uniform spot for a 1.7 mm VCSEL array at 10 m, advancing cost-effective collimation techniques.
Keywords:
VCSEL
Collimation
Freeform lens
Pulse-driven laser
Computational model
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