This folder contains the data published in the associated manuscript.
The calibration folder included three spectra acquired with the spectrometer centred at 380nm, 405nm and 430nm. The calibration file named “calibrazione_18082012_fwd” is a Matlab script that illustrates the calibration process.
The Matlab array called ”lambda_180812_zero_centered” is the result of this calibration procedure and is used to convert pixels into nanometers when considering the spectral included in the folder “Spectra_high_and_low_energy.”
This folder contains all the spectra at low (1pc) and high (4pc) pump power. The file name indicates the central wavelength of the spectrometer for the particular acquisition.
The name of the file carries further useful information and should be interpreted as follow:
example: 1pc_350nm_2s_15.6del_bkg_irfilt
- 1pc: low energy
- 350nm: central wavelength of the spectrometer is 350nm
- 2s: two seconds of integration on the camera (the laser repetition rate is 100Hz)
- 15.6del: distance between the pump lend and the diamond sample
- bkg: indicates that this acquisition is a background field, to be used for correcting the data file (this is named without the “bkg” option
- irfilt: indicates that the acquisition has been performed with an additional IR filter.

Other notations are, for instance: “plus_od1d2” which meant the addition of a neutral density filter before the spectrometer, with optical density OD 1 + another one with OD 2.

The folder “Spectra_800_in_and_out” includes spectra of the 800nm pump acquired around the carrier frequency with a fibre spectrometer. The name of the files follow the syntax:
“1pc_spec_800_rr_150ms_150ms”
where:
- 1pc: low energy
- spec_800: spectrum after interaction.
- spec_input: input spectrum
-150ms: integration time
- bkg: background acquisition