Broadband laser tunability of Nd 3+ ions in 0.8CaSiO 3 -0.2Ca 3 (PO 4 ) 2 eutectic glass

Site-selective spectroscopy and stimulated emission experiments performed in the 4F3/2→4I11/2 laser transition of Nd3+-doped 0.8CaSiO3-0.2Ca3(PO4)2 eutectic glass are presented. The spectral features of the excitation spectra and those of spontaneous and stimulated emissions reveal the existence of a very complex crystal field site distribution for Nd3+ ions. As a consequence, the stimulated emission of Nd3+ in this glass shows a tunability of about 10 nm as a function of excitation wavelength.