Free-Space Remote Sensing of Rotation at the Photon-Counting Level
Free-Space Remote Sensing of Rotation at the Photon-Counting Level
复制标题
光子计数水平的自由空间旋转遥感
DOI：
10.1103/physrevapplied.10.044014
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发表时间：
2018-04
影响因子：
4.6
通讯作者：
Chen Lixiang
中科院分区：
文献类型：
--
作者：
Zhang Wuhong;Gao Jingsong;Zhang Dongkai;He Yilin;Xu Tianzhe;Fickler Robert;Chen Lixiang
与光的轨道角动量（OAM）相关的旋转多普勒效应已被发现是探测旋转物体的有力工具。然而，该方法仅在实验室规模上在良好控制的条件下进行了实验证明。其真实的潜力在于在遥感领域的实际应用。我们已经建立了一个120米长的自由空间的两个建筑物的屋顶之间的链接，并表明，无论是旋转速度和旋转对称的对象可以确定从检测到的旋转多普勒频移信号在光子计数水平。可能轻微的失调和大气干扰的影响进行了定量分析的模式功率传播到相邻模式，以及旋转频率偏移的转移。此外，我们的研究结果表明，与预知的对象的旋转对称性，可以总是推断出旋转速度，无论多么强大的耦合到相邻模式。在没有旋转物体的任何信息的情况下，只要模式扩展效率不超过50%，仍然可以获得物体的对称性和旋转速度的推导。我们的工作支持的可行性，一个实用的传感器远程检测旋转体的速度和对称性。
The rotational Doppler effect associated with light's orbital angular momentum (OAM) has been found as a powerful tool to detect rotating bodies. However, this method was only demonstrated experimentally on the laboratory scale under well controlled conditions so far. And its real potential lies at the practical applications in the field of remote sensing. We have established a 120-meter long free-space link between the rooftops of two buildings and show that both the rotation speed and the rotational symmetry of objects can be identified from the detected rotational Doppler frequency shift signal at photon count level. Effects of possible slight misalignments and atmospheric turbulences are quantitatively analyzed in terms of mode power spreading to the adjacent modes as well as the transfer of rotational frequency shifts. Moreover, our results demonstrate that with the preknowledge of the object's rotational symmetry one may always deduce the rotation speed no matter how strong the coupling to neighboring modes is. Without any information of the rotating object, the deduction of the object's symmetry and rotational speed may still be obtained as long as the mode spreading efficiency does not exceed 50 %. Our work supports the feasibility of a practical sensor to remotely detect both the speed and symmetry of rotating bodies.
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影响因子：
7.6
作者：
Fu, Shiyao;Gao, Chunqing
通讯作者：
Gao, Chunqing
影响因子：
3.8
作者：
Torner, L;Torres, JP;Carrasco, S
通讯作者：
Carrasco, S
DOI：
10.1017/cbo9781139207249.009
发表时间：
2012
期刊：
--
影响因子：
--
作者：
W. Marsden
通讯作者：
W. Marsden
影响因子：
8.6
作者：
Paterson, C
通讯作者：
Paterson, C
影响因子：
10.4
作者：
Lavery, Martin P. J.;Barnett, Stephen M.;Padgett, Miles J.
通讯作者：
Padgett, Miles J.