Open AccessResolution-enhanced heterodyne laser interferometer with differential configuration for roll angle measurement
Author(s) -
Jingya Qi,
Zhao Wang,
Junhui Huang,
Jianmin Gao
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.009634
Subject(s) - optics , interferometry , heterodyne (poetry) , differential phase , astronomical interferometer , resolution (logic) , physics , phase (matter) , laser , heterodyne detection , noise (video) , acoustics , computer science , quantum mechanics , artificial intelligence , image (mathematics)
A high resolution roll measurement heterodyne interferometer with differential configurations is proposed in this paper. The proposed interferometer is composed of a pair of measurement beams providing environmental noise immunity. The structure is designed and the mathematic model based on Jones' matrix for measuring the roll angle is established. Sensitivity is enhanced dramatically because of the opposite phase shift directions of two signals. An experimental setup is built and an amplification factor of 270 is obtained. Correspondingly, a roll angle resolution of 0.13 arcsec is attained using a phase meter with detecting resolution of 0.01°.