Study On Rare Earth Doped New Bismuthate Glass

In recent years, due to the rapid growth of information and flexible network requirements, how to improve the communication capacity of existing optical fiber communication system has become imperative. However, as a conventional WDM system of important equipment erbium-doped silicate fiber amplifier（EDFA）bandwidth is very limited, how to meet this growing demand, has become the mainstream of current optical communication research.Currently, the most effective way is to develop a new type of ultra-broadband fiber amplifier. On the one hand, it can replace the traditional silicate glass material by finding a new type of amplifier glass material. Compared with traditional silicate glass, bismuth glass having more excellent characteristics, such as high refractive index, non-toxic, low melting temperature, the son whispered energy, etc., is applied to the optical amplifier a pole a promising matrix material. On the other hand, it can be discovered by other rare earth ions to broaden its luminous band.In this paper, for the first time to design two new multi-component bismuth glass systems, Li₂O-Sr O-Zn O-Bi₂O₃（LSZB） and Li₂O-Na₂O-Zn O-MoO₃-Bi₂O₃（LNZMB）glass system, respectively. By rare earth research potential applications of the system in optical amplifiers, lasers and upconversion luminescence and other fields, and we have made some achievements.All glass samples were prepared by high temperature obtained by melting method, and then test the physical and spectral properties of the sample, and using Judd-Ofelt theory and related theory Mc Cumber spectra corresponding analysis and discussion. First, through the analysis of glass samples undoped Raman spectroscopy,we can see the new bismuth glass system designed in this paper is a very suitable matrix material for a rare earth doped. Second, the FWHM of Er³⁺ doped LSZB glass sample was 78 nm, stimulated emission cross section at 1535 nm was 9.76 10^-21 cm²,both the product reached 761.28 10^-21 cm² s, this value is particularly important for optical amplifier, indicating LSZB erbium-doped glass system has good performancegain amplification, is applied to the wideband amplifier ideal matrix material. Third,the analysis of the absorption of Tm³⁺ doped glass LSZB and emission spectra at785 nm pump lasers in the vicinity of 1.47 mm was observed significant fluorescence emission, and a bandwidth of approximately 112 nm. Finally, we discuss the two kinds of erbium-doped glass systems upconversion mechanism found there is a strong green and red upconversion emission in the vicinity of 549 nm and 659 nm.In summary, this paper two kinds of rare earth doped bismuth glass of the new system in the field of optical amplifiers, lasers and the like on the conversion device has a broad application space.