The content of the zip file contains data for figure in the article 

Bottrill, K., Kakarla, R., Parmigiani, F., Venkitesh, D. and Petropoulos, P.  (2015)  Phase regeneration of QPSK signal in SOA using single-stage, wavelength converting PSA. IEEE Photonics Technology Letters, 1.  (doi:10.1109/LPT.2015.2489843). 

Bers Folder
The BER data in this directory corresponds to that used to plot Figure 5 in the document DOI:10.1109/LPT.2015.2489843

noise-statistics Folder
The noise statistics data in this directory corresponds to that used to plot Figure 4-a in the document 

spectra Folder
The spectral data in this directory corresponds to that used to plot Figure 2 in the document