Open AccessDigital error correction of dual-comb interferometer without external optical referencing information
Author(s) -
Haoyang Yu,
Kai Ni,
Qian Zhou,
Xinghui Li,
Xiaohao Wang,
Guanhao Wu
Publication year - 2019
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.27.029425
Subject(s) - interferometry , optics , jitter , laser linewidth , phase noise , computer science , comb generator , coherence (philosophical gambling strategy) , mutual coherence , frequency comb , physics , telecommunications , laser , quantum mechanics
Long-term mutual coherence is a key factor that affects the signal-to-noise ratio and resolution of a dual-comb interferometer. To realize a phase-stable dual-comb interferometer configuration, tightly phase-locked loop systems or digital error correction methods with external optical reference are commonly used. This paper presents a self-referencing digital error correction method based on the short-term spectral characteristics of interferograms to reduce the cost and complexity of the phase-stable dual-comb interferometer configuration. In our experiment, fully mutual coherence of a dual-comb interferometer is reconstructed and 1 Hz theoretical linewidth in 1 s acquisition time is achieved by digitally compensating for time jitter, center frequency jitter, and carrier-envelope-phase jitter, offering an effective technique for advanced dual-comb applications.