期刊
OPTICS LETTERS
卷 42, 期 21, 页码 4482-4485出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.42.004482
关键词
-
类别
资金
- Basic Research Office of the Assistant Secretary of Defense for Research and Engineering - Office of Naval Research (ONR) [N00014-16-1-2813]
- National Science Foundation (NSF) [ECCS-1509965]
Light beams can be characterized by their complex spatial profiles in both intensity and phase. Analogous to time signals, which can be decomposed into multiple orthogonal frequency functions, a light beam can also be decomposed into a set of spatial modes that are taken from an orthogonal basis. Such decomposition can potentially provide a tool for spatial spectrum analysis, which may enable stable, accurate, and robust extraction of physical object information that may not be readily achievable using traditional approaches. As a proof-of-concept example, we measure an object's opening angle using orbital-angular-momentum (OAM) - based complex spectrum, achieving a > 15 dB signal-to-noise ratio. Moreover, the dip (i.e., notch) positions of the OAM intensity spectrum are dependent on an object's opening angle but independent of the opening's angular orientation, whereas the slope of the OAM phase spectrum is dependent on the opening's orientation but independent of the opening angle. (C) 2017 Optical Society of America
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据