The file contains the 4 original datasets used in the paper. The format is HD5. The data represents transients recorded with a Keysight 63GHz real time oscilloscope. The data represents the output from fast 35GHz and 50GHz diode base photo receivers detecting beat signals of two independent lasers. The filename "#A_Bnm_Cnm_Dus.h5" contains the following information: - A is the number of the measurement - B is the bandwidth of the FDML output in nanometers - C is the wavelength of the CW laser in nanometers - D is the length of the measurement in micrometers The data set "#9_80nm_1290nm_200us.h5" is shown in: - Figure 4e (as Measurement 3) The data set "#10_80nm_1290nm_200us.h5" is shown in: - Figure 4e (as Measurement 4) The data set "#17_40nm_1305nm_200us.h5" is shown in: - Figure 2b, c, d, e - Figure 3 - Figure 4a, b, c, d, e(as Measurement 1) - Figure S2 - Figure S3 - Figure S4 The data set "#18_40nm_1305nm_200us.h5" is shown in: - Figure 4e (as Measurement 2) Each dataset contains two collections of data. One is the beatsignal between FDML laser and CW laser. The second is the beatsignal between the two CW lasers during the measurement time of the first beat signal.