A Sub-ns Pulsed VCSEL Driver with Real-Time Adaptive Current Control, Integrated Boost Switching Regulator and Class-1 Laser Eye Safety

作者：Tao Xia, Yuan Li, Liujia Song, Wei Chen, Hengwei Yu, Miao Sun, Lei Zhao, Zhihong Lin, Yuntong Tian, Hao Yan, Jiabin Meng, Yifan Wu, Yajie Qin, Xuefeng Chen, Shenglong Zhuo, Patrick Yin Chiang · 年份：2023 · DOI：10.1109/esscirc59616.2023.10268758 · 被引用次数：4 · 研究领域：Advanced Optical Sensing Technologies、Semiconductor Lasers and Optical Devices、Integrated Circuits and Semiconductor Failure Analysis

This paper presents a sub-ns pulsed laser diode driver IC for multi-junction vertical-cavity surface-emitting laser (VCSEL) arrays. An embedded real-time adaptive current control loop keeps the error of laser current amplitude within $\pm 3\%$ for 900ps $\sim 32\mathrm{~ns}$ pulses, even with PVT variations of the VCSEL and the driver. A boost switching regulator is integrated into the IC to convert a low supply voltage to the $5\sim 8.5\mathrm{~V}$ laser anode supply. A complete set of laser safety check blocks are integrated to guarantee class-1 eye safety, as the driver IC can stop emitting and cut off the laser supply when a laser safety hazard is detected.