Journal
NANOPHOTONICS
Volume 11, Issue 6, Pages 1127-1135Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1515/nanoph-2021-0622
Keywords
compound motion; interferometry; measurement; orbital angular momentum
Categories
Funding
- National Nature Science Foundation of China [11772001, 62173342, 61805283]
- Key research projects of foundation strengthening program of China [2019-JCJQ-ZD]
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This paper proposes an interference scheme utilizing vortex beams to achieve independent measurement of rotation and rectilinear motion. Experimental results demonstrate that this method can effectively detect multiple movement forms of a target even under complex motion backgrounds.
The simultaneous and independent measurement of multiple movement forms is a significant issue to be solved in research. In this paper, we proposed a method that combines the self-interference of conjugated optical vortices and external interference of plane waves, and successfully realize the independent measurement of both rotation and rectilinear motion. Three kinds of interference schemes based on vortex beams are analyzed theoretically and verified experimentally. The results show that the double interference between conjugated optical vortices and Gaussian beam can detect the motion along and perpendicular to the beam propagation direction even under complex motion background, providing a powerful way to detect the multiple movement forms of a target. Our work may pave a new way for the detection of spatial noncooperative targets and stimulate the invention of new detection equipment.
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