Properties of Er³⁺/Yb³⁺ Codoped Phosphate Glass for Waveguide Amplifiers

通过优化熔融条件和玻璃组份，成功开发出一种新的Er^3+／Yb^3+共掺磷酸盐玻璃，其在沸水和熔盐中均表现出很好的化学稳定性。通过分析室温下Er^3+／Yb^3+共掺磷酸盐玻璃的吸收光谱，计算得到了Er^3+离子在波长1533nm处的峰值发射截面和杜得-奥菲而特强度参数；其中Er^3+离子在波长1533nm处的峰值发射截面为0．72×10^20cm^2，大于Schott的IOG1玻璃中Er^3+离子的峰值发射截面0．67×10^-20cm^2。通过改变离子交换的条件，获得了1．55μm单模光波导的制作条件A novel Er3+/Yb3+ codoped phosphate glass WM4 was designed and developed, which exhibited good chemical durability in molten salts and good spectroscopic properties. The stimulated emission cross-section of 4I13/2→4I15/2 transition of Er3+ ions and Judd-Ofelt intensity parameters Ωt (t=2,4,6) were obtained by analyzing the room temperature absorption spectrum; the stimulated emission cross-section of 4I13/2→4I15/2 transition of Er3+ ions was 0.72×10-20 cm2, which is larger than that of Schott′s IOG1, 0.67×10-20 cm2. Preliminary results of ion exchange at different time and temperature with varying molten salt compositions indicated that WM4 glass was suitable for ion exchange process and Er3+-doped waveguide amplifier (EDWA) application, and single mode optical waveguide at 1.55 μm was fabricated. The propagation loss of all the waveguides was less than 1 dB/cm