Open AccessDC-offset-free homodyne interferometer and its nonlinearity compensation
Author(s) -
Pengcheng Hu,
Jinghao Zhu,
Xiaoyu Zhai,
Jiubin Tan
Publication year - 2015
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.23.008399
Subject(s) - interferometry , optics , direct conversion receiver , offset (computer science) , homodyne detection , interference (communication) , physics , nonlinear system , compensation (psychology) , telecommunications , computer science , psychology , channel (broadcasting) , quantum mechanics , psychoanalysis , programming language
This study presents an analysis of the cyclic nonlinearity in the homodyne interferometer starting from the interference principle. We present the design for an enhanced homodyne interferometer without DC offset, for which the nonlinearity model will not be influenced by the intensity of the measurement beam. Our experimental results show that the enhanced interferometer can suppress the nonlinearity to less than 0.5 nm with a system calibration involving gain adjustment and phase-correction methods.