McCarthy Aongus, Krichel Nils J, Gemmell Nathan R, Ren Ximing, Tanner Michael G, Dorenbos Sander N, Zwiller Val, Hadfield Robert H, Buller Gerald S
Institute of Photonics and Quantum Sciences, and Scottish Universities Physics Alliance (SUPA), School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK.
Opt Express. 2013 Apr 8;21(7):8904-15. doi: 10.1364/OE.21.008904.
This paper highlights a significant advance in time-of-flight depth imaging: by using a scanning transceiver which incorporated a free-running, low noise superconducting nanowire single-photon detector, we were able to obtain centimeter resolution depth images of low-signature objects in daylight at stand-off distances of the order of one kilometer at the relatively eye-safe wavelength of 1560 nm. The detector used had an efficiency of 18% at 1 kHz dark count rate, and the overall system jitter was ~100 ps. The depth images were acquired by illuminating the scene with an optical output power level of less than 250 µW average, and using per-pixel dwell times in the millisecond regime.
通过使用一种集成了自由运行、低噪声超导纳米线单光子探测器的扫描收发器，我们能够在1560纳米这个相对对眼睛安全的波长下，在约一公里的远距离处，于日光下获得低特征物体的厘米级分辨率深度图像。所使用的探测器在1千赫暗计数率下效率为18%，整个系统抖动约为100皮秒。深度图像是通过以平均小于250微瓦的光输出功率水平照射场景，并使用毫秒级的每像素驻留时间来获取的。
