A phase-to-intensity strategy of angular velocity measurement based on photonic orbital angular momentum.

ABSTRACT: Recently, orbital angular momentum (OAM) has been adopted to measure the shape of static objects and the translation motion of moving objects in optical remote sensing. Most of these studies rely on measuring the intensity variation of OAM beams. However, the OAM intensity does not change with the rotation of the spinning object, but its phase changes. The phase variation is proved to be proportional to the object's angular velocity. Since a rotating object will cause the OAM phase dependent on time, the OAM phase needs to be measured instantaneously, to support the OAM-based angular velocity measurement. In this work, we report a scheme to measure the angular velocity of a spinning object using a photonic OAM phase spectrum. A phase-to-intensity strategy is implemented to enable the real-

SUBMITTER: Deng D 

PROVIDER: S-EPMC11501140 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature