Wright Hollie, Nelmes Alexander J M, Weston Nick J, Reid Derryck T
Opt Express. 2023 Jul 3;31(14):22497-22506. doi: 10.1364/OE.490052.
By substituting two-photon cross-correlation in a wide-bandgap photodiode for the coherent gating conventionally used in dual-comb ranging, two-photon dual-comb LiDAR exchanges data-intensive interferometric acquisition for a single time-stamp from which an absolute distance can be inferred. Here, we report the application of two-photon dual-comb LiDAR to obtain real-time ranging to three independent targets with only a single silicon-photodiode detector. We show precisions of 197-255 nm (2 seconds averaging time) for static targets, and real-time simultaneous ranging to three dynamic targets driven by independent sinusoidal, saw-tooth and square waveforms. Finally, we demonstrate multi-target ranging to three points on a rigid body to provide simultaneous pitch and yaw angular measurements with precisions of 27.1 arcsec (130 µrad) on a 25 mm baseline.
通过在宽带隙光电二极管中用双光子互相关替代双梳测距中传统使用的相干选通，双光子双梳激光雷达将数据密集型干涉测量采集换成了一个绝对距离可从中推断出的单个时间戳。在此，我们报告了双光子双梳激光雷达仅使用单个硅光电二极管探测器对三个独立目标进行实时测距的应用。我们展示了静态目标的精度为197 - 255纳米（平均时间2秒），以及对由独立正弦、锯齿和方波驱动的三个动态目标进行实时同时测距。最后，我们展示了对刚体上三个点的多目标测距，以在25毫米基线上提供精度为27.1角秒（130微弧度）的同时俯仰和偏航角测量。
