Hi, this is maybe late reply, but first try to export your FBG spectrum to a folder on your device, choose the export tool from the menu in the Optigrating software.Choose export as optisystem/text files. Once you have already organized your text files and named them, for example 100,200,,, microstrain or 20 C if you are examining the sensor under different parameters, now you go to the Optigrating component in the Optisystem, double click on it, enter the main list, click FBG file name, browse and import your file, this is the case of single file to be imported, in case you are working with several spectrume, just click on sweep instead of normal, set your sweeps as the number of files/parameters you are working on, upload them one by one. Hope this is helping. Besy regards