High-precision inter-core skew measurement for multi-core fiber using incoherent interferometry based on sliced-ASE noise
Abstract
We propose and experimentally demonstrate an inter-core skew measurement method for multi-core fibers (MCFs) based on broadband incoherent interferometry of spectrum-sliced amplified spontaneous emission (ASE) noise. The technique avoids the need for narrow-linewidth lasers and tolerates the random power fading due to coherent coupling among neighboring cores. By utilizing a calibrated interference spectrum to extract the delay value through cascaded filtering and fitting, the proposed technique achieves sub-picosecond measurement accuracy. Both the back-to-back and 41-km MCF experiments demonstrate stable performance with root mean square errors of
Fields of Study & Subjects
Advanced Fiber Optic Sensors
Optical Network Technologies
Optical Coherence Tomography Applications
Publication details
- Journal / source
- Optics Letters
- Publisher
- Optica Publishing Group
- Volume
- 51
- Issue
- 9
- Pages
- 2504–2504
- Publication date
- 31 March 2026
- Language
- EN