Open AccessWavenumber synthesis approach to high-resolution wavenumber scanning interference using a mode-hoped laser
Author(s) -
Yulei Bai,
Yanzhou Zhou,
Zhaoshui He,
Shengli Xie
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.26.005441
Subject(s) - wavenumber , optics , interference (communication) , interferometry , fourier transform , discontinuity (linguistics) , physics , materials science , telecommunications , computer science , mathematics , mathematical analysis , channel (broadcasting) , quantum mechanics
A new method for the synthesis of wavenumber series before and after mode hopping is proposed for depth-resolved wavenumber scanning interferometry. The classical Fourier transform is not suitable for mode hopping; consequently, the wavenumber scanning range of diode lasers is rather narrow, reducing the depth resolution and measurement accuracy. We show that the discontinuity in wavenumber domain interferograms caused by mode hopping can be removed by introducing the phase compensation of the interference spectrum. Thus, the wavenumber series before and after mode hopping can be synthesized. Experiments and numerical simulations validate the proposed method, and the measurement error is within 5nm.