Data sets corresponding to all the figures in the article (main text). Name of file corresponds to the specific figure. The data sets are produced from oscilloscope traces that record the light intensity extracted from two coupled fibre rings using two photodiodes (Thorlabs DET08CFC) with 5 GHz bandwidth. The oscilloscope time traces are arranged in a series of temporal segments, each one corresponding to the average round trip in the two-fibre loop system. The oscilloscope is a Tektronix MSO64 featuring 6 GHz bandwidth, 10-bit vertical resolution, 25 GS/s sampling rate, and a memory record length of 62.5 Mpts corresponding to 2.5 ms.