Green and near infrared emission of Er3+ doped PZS and PZC glasses

The glasses with composition 50P2O5-30ZnO-20SrO (PZS) in mol% doped with 30,000 ppm Er2O3 and 50P2O5-30ZnO-20CdO (PZC) in mol% doped with 30,000 ppm Er2O3 were prepared by quenching -melting method. Spectroscopic and Judd-Ofelt (J-O) parameters, Ωt, of these glasses were evaluated. Moreover, different radiative properties and optical energy gap of prepared glass were calculated. The emission spectra of the PZC-30000Er and PZS-30000Er glasses excited at 490 nm show an important emission band at 550 nm and the emission cross-section σ e ( λ ) for the resonant transition at 1530 nm is equal 0.47 × 10 20 c m 2 for PZC glass and 0.39 × 10 20 c m 2 for PZS glass. Optical gain coefficient, G(λ), of the prepared glass were calculated and it is obtained that PZC glass lasing would be achieved at 1550 nm for a population inversion about 40% and at 1510 nm in the case of PZS glass. The structure of prepared glass investigated by using Raman spectra, has shown that SrO creates more bridging oxygen in the linkage of P2O5- ZnO glass network compared with CdO in the same glass matrix. In conclusion, these glasses can be used to generate green light and they can be useful for laser applications in the NIR region.