KMS Chongqing Institute of Green and Intelligent Technology, CAS
| Precisely measuring the orbital angular momentum of beams via weak measurement | |
Qiu, Jiangdong1,2; Ren, Changliang2  ; Zhang, Zhiyou1
| |
| 2016-06-23 | |
| 摘要 | We proposed and analyzed a scheme of precisely measuring orbital angular momentum (OAM) of the vortex beams with the help of weak measurement process. The orbital angular momentum information l of the unknown OAM state can be obtained by its spatial displacements. The valid condition of precisely measuring orbital angular momentum was completely discussed. Interestingly, it is shown that the measurement by using the two-dimensional spatial displacements jointly is very useful for precisely measuring the OAM state with a large orbital angular momentum l. The signal-to-noise ratio of the measurement can be enhanced by increasing the weak-coupling. linearly as the valid condition is still satisfied. For fixed., the maximal signal-to-noise ratio for each weak value increases with the decrease of the weak value. |
| DOI | 10.1103/PhysRevA.93.063841 |
| 发表期刊 | PHYSICAL REVIEW A
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| ISSN | 2469-9926 |
| 卷号 | 93期号:6页码:5 |
| 通讯作者 | Zhang, ZY (reprint author), Sichuan Univ, Minist Educ, Key Lab High Energy Dens Phys & Technol, Chengdu 610064, Peoples R China. ; Ren, CL (reprint author), Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Beijing 100864, Peoples R China. |
| 收录类别 | SCI |
| WOS记录号 | WOS:000378304100011 |
| 语种 | 英语 |
