Experimental demonstration of single photon rangefinding using parametric downconversion.
Experimental demonstration of single photon rangefinding using parametric downconversion.
复制标题
使用参数下转换进行单光子测距的实验演示。
DOI：
10.1364/ao.29.002939
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发表时间：
1990
期刊：
影响因子：
1.9
通讯作者：
S. Seward
中科院分区：
文献类型：
--
作者：
J. Rarity;P. Tapster;J. G. Walker;S. Seward
我们利用自发参数荧光中产生的光子对的重合特性来进行弱光测距实验。每对光子中的一个被发送到目标，返回的一小部分被返回行程时间延迟。这种延迟是用一个多通道符合计数器测量的，门时间低至10ns。使用几皮瓦的输出功率和10（-4）的目标返回，我们在低水平背景光下在几秒钟内获得1米分辨率范围估计。我们讨论了该技术在高环境光水平下毫米精度测距（或测量）的潜力。
We exploit the coincidence properties of photon pairs created in spontaneous parametric fluorescence to perform a low light level rangefinding experiment. One photon of each pair is sent to the target, and the small fraction returned is delayed by the return trip time. This delay is measured using a multichannel coincidence counter with gate time down to 10 ns. With a few picowatts output power and a target return of 10(-4)we obtain 1-m resolution range estimates in a few seconds with low levels of background light. We discuss the potential of the technique for millimeter accuracy ranging (or surveying) in high ambient light levels.