Efficient Luminescence And Characterization Of Er³⁺ In Mesoporous Sieves Functionalized With PMS

The optical fiber network has became the most important communication system both on land and under sea. With the developing of the DWDM technology applied widely into the transmission and access network, the all-optical network will be realized in future. The rare earth-doped fiber amplifier is emerging as a major enabler in the development of worldwide all-optical networks. Amplifier properties such as the operating wavelength, the gain bandwidth and the capability of the absorption are determined by the different rare-earth elements doped into the silica fiber, which plays the role of a host medium.The article has researched a new host medium, that is the nanosized Er-SBA-15 mesoporous composite material. The high efficiency emission and characterization of Er³⁺ in mesoporous sieves SBA-15 has been discussed in details. The absorption spectra, emission spectra, XRD, SEM, TEM can be obtained experimentally from the measurements of the host material. According to them, the nanoized erbium implanted mesoporous materials functionalized with and without PMS as ligand were studied. Luminescence with high intensity has been obtained. The reason why the PMS could make the Er³⁺ in mesoporous sieves SBA-15 get the high efficiency emission has been explained deeply.Moreover, the article will give a clear presentation and analyses to Judd-Ofelt (J-O) theory. The Judd-Ofelt strength parametersΩ_t(t=2,4,6 ) were calculated. Oscillator strength, spontaneous emission probability, branching ratio and emission lifetime of each energy levels of Er³⁺ were given. The peak intensity of emission spectra varying with the pump power was discussed. Stimuated emission cross section was calculated and compared with other host materials.