This dataset supports the above manuscript accepted for publication in Photonics Research The dataset contains: The excel file 'imaging_summary' summary all the data of FIG.1b, FIG.2b, FIG.2c, FIG.3b, FIG.4b, including experiment data and simulation results. The simulation results data of FIG.1b is 'tapered_dispersion.xlsx'. The raw experiment data of FIG.2b is '211212-2.CSV'. The raw experiment data of FIG.2c is 'coherence.xlsx'. The raw experiment data of FIG.3b is 'amplitude_pattern.xlsx'. The raw experiment data of FIG.4b is 'phase_pattern.xlsx'. The simulation results data of FIG.6b is 'untapered_dispersion.xlsx'.