出版社：Electronics and Telecommunications Research Institute
摘要：Spectroscopic and thermal analysis indicates that tellurite glasses doped with and are promising candidate host materials for wide-band erbium doped fiber amplifier (EDFA) with a high 980 nm pump efficiency. In this study, we measured the thermal stabilities and the emission cross-sections for transition in this tellurite glass system. We also determined the Judd-Ofelt parameters and calculated the radiative transition rates and the multiphonon relaxation rates in this glass system. The 15 mol% substitution of for in the glass raised the multiphonon relaxation rate for transition from 4960 to 24700 , but shortened the lifetime of the level by 14 % and reduced the emission cross-section for the transition by 11%. The 15 mol% substitution in the same glass system also reduced the emission cross-section but increased the lifetime by 7%. However, the multiphonon relaxation rate for transition was raised merely by 1000 . Therefore, a mixed substitution of and for was concluded to be suitable for the 980 nm pump efficiency and the fluorescence efficiency of transition in tellurite glasses.
