Open AccessWavenumber calibration and phase measurement in swept source optical coherence tomography
Author(s) -
Ziwei Shangguan,
Yi Shen,
Peng Li,
Zhihua Ding
Publication year - 2016
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.65.034201
Subject(s) - interferometry , optics , phase (matter) , wavenumber , optical coherence tomography , mach–zehnder interferometer , time domain , physics , coherence (philosophical gambling strategy) , synchronization (alternating current) , coherence time , calibration , computer science , telecommunications , laser , channel (broadcasting) , quantum mechanics , computer vision
Based on the phase information in time domain of a Mach-Zehnder interferometer (MZI), a method of calibrating the wavenumber of the source is proposed. Cross-correlation of wrapped phase in time-domain of the MZI is adopted to determine drifts among axial-lines. Owing to non-strictly periodic characteristics of wrapped phase in time-domain of the MZI, the determinable range of shift is unlimited. Synchronization of signals in time domain is then performed to correct their corresponding shifts. The obtained results demonstrate that it is feasible to realize phase measurement with high precision even under unstable swept source for the optical coherence tomography system.