Abstract In this work, a new type of emitting direction tunable slotted laser array for Lidar applications is proposed. By designing the structure of periodic slots, the laser array can achieve tunable emitting direction in a wide range with low vertical divergence angle. The laser array can be directly used as Lidar emitting chip without complex beam reshaping, coupling or mechanically moving parts, which makes it has the advantages of good stability, system simplification and low cost compared with other Lidars. Experimentally, an 11-channel laser array of C band with periodic slots at the output end is fabricated based on AlGaInAs/InP material system. As the slot period changes from 8 μ m to 18 μ m , the inclined angles of emission from 66.6° to 20.25° with all the vertical divergence angles less than 3.5° are obtained, and the minimum vertical divergence angle is even 1.3°. Typical optical power is 13.5 mW under 600 mA continuous injection.

中文翻译：

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用于激光雷达应用的发射方向可调开槽激光阵列

摘要 在这项工作中，提出了一种用于激光雷达应用的新型发射方向可调谐开槽激光器阵列。通过设计周期槽结构，激光器阵列可以实现大范围内可调发射方向，垂直发散角小。该激光器阵列可直接用作激光雷达发射芯片，无需复杂的光束整形、耦合或机械运动部件，与其他激光雷达相比具有稳定性好、系统简化、成本低等优点。实验上，基于AlGaInAs/InP材料系统制作了输出端具有周期性槽的11通道C波段激光阵列。当时隙周期从 8 μ m 变为 18 μ m 时，获得了所有垂直发散角都小于 3.5° 的发射倾斜角从 66.6° 到 20.25°，最小垂直发散角甚至为1.3°。在 600 mA 连续注入下，典型的光功率为 13.5 mW。