High Precision Micro - Dispersion Measurement Based on Spectral Interferometry using a Soliton Microcomb

This paper investigates the use of the diff - iteration method based on spectral interferometry for measuring the micro - dispersion of optical devices (optical fiber, lens, etc.). Using an optical frequency comb, based on the phase demodulation of dispersion interference spectrum, by employing the carefully designed diff - iteration method to solve the dispersion curve at any position and any order. Our approach is proficient in precisely measuring micro - dispersion across a broadband spectrum, without the need for cumbersome wavelength scanning processes or reliance on complex high - repetition - rate combs, while enabling adjustable resolution. The efficacy of the proposed method is validated through simulations and experiments. The approach ensures high precision, while maintaining a simple system structure, with realizing adjustable resolution, thereby propelling the practical implementation of precise measurement and control - dispersion.