These datasets have been used to produce Figure 3, 4 and 5 of manuscript: "Coherent phase transfer for real-world twin-field quantum key distribution". The files contain two arrays: time in seconds and normalised intensity. Explanation for "Data_fig3_XXX.txt": the files contains the raw data used to produce Fig. 3. The following timespans have been used: Data_fig3_stabilised.txt: t_start= 0.29 s, t_stop=0.292 s Data_fig3_unstabilised.txt: t_start=0.00225 s, t_stop=0.00424 s Explanation for "Data_fig4_XXX.txt" files: the procedure to obtain the phase deviation from the normalised interference is detailed in the text (Methods section). Datasets with different sampling rate have been combined to obtain the phase deviation on the long and short term. Explanation for "Data_fig5.txt": the files contains the raw data used to produce Fig. 5.