Open AccessNonlinearity error in homodyne interferometer caused by multi-order Doppler frequency shift ghost reflections
Author(s) -
Pengcheng Hu,
Yue Wang,
Haijin Fu,
Jinghao Zhu,
Jiubin Tan
Publication year - 2017
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.25.003605
Subject(s) - astronomical interferometer , direct conversion receiver , optics , interference (communication) , interferometry , physics , doppler effect , retroreflector , homodyne detection , computer science , laser , telecommunications , quantum mechanics , channel (broadcasting)
This paper reports a hitherto undiscovered cyclic error whose origin is different from that of conventional errors in homodyne interferometers. To explain this error, a model based on ghost reflections and the interference principle is developed. In general, in homodyne interferometers, multi-order Doppler frequency shift ghost beams participate in the final interference and generate multi-order cyclic errors. This "new" cyclic error is compared with conventional errors by means of Lissajous curves. And we establish a setup to validate our proposed model. We use a corner cube retroreflector to replace the mirror and we find the error is significantly reduced. We believe that our findings can contribute to the further development of highly accurate homodyne interferometers.