Broadband luminescence at 1.5 μm of Er P co-doped high silica glass by nanoporous doping technology

Abstract The Er P co-doped high silica glass is made by sintering nanoporous silica glass (NPSG) at 1150 °C. Under 980 nm laser excitation, a broadband luminescence at 1.5 μm is obtained, which has multiple luminescence peaks. In order to analyze the luminescence broadening, we fitted the luminescence peaks and observe the change laws of the center wavelength, area integral and FWHM of each fitting peak. The study found that with the change of Er P concentration, the luminescence broadened to the S-band, and the center wavelength, integral area and FWHM of their fitting peaks near 1512 nm, 1540 nm, and 1593 nm change regularly. The change of Er P concentration leads to the change of these fitting peaks, which makes the luminescence broaden.