Emitting direction tunable slotted laser array for Lidar applications
Emitting direction tunable slotted laser array for Lidar applications
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DOI：
10.1016/j.optcom.2020.125277
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发表时间：
2020-05
影响因子：
2.4
通讯作者：
Yanmei Su;Yu Bi;Pengfei Wang;Jie Sun;Xiuyan Sun;S. Luo;Jiao-qing Pan;Yejin Zhang
中科院分区：
文献类型：
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作者：
Yanmei Su;Yu Bi;Pengfei Wang;Jie Sun;Xiuyan Sun;S. Luo;Jiao-qing Pan;Yejin Zhang
本文提出了一种新型的激光雷达发射方向可调谐缝隙激光器阵列。通过设计周期性缝隙结构，该激光器阵列可以在较宽的范围内实现出射方向的可调谐，且垂直发散角较小。激光器阵列可以直接作为激光雷达发射芯片，无需复杂的光束整形、耦合或机械运动部件，这使得它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。在实验上，采用AlGaInAs/InP材料系统，制作了输出端带有周期性狭缝的11通道C波段激光器列阵。当狭缝周期从8 μ m变化到18 μ m时，垂直发散角均小于3.5°，最小垂直发散角为1.3°，倾斜角从66.6°变化到20.25°。在600 mA连续注入下，典型光功率为13.5 mW。
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.