Broadband near-IR emission and temperature dependence in Er/Tm co-doped Bi_2O_3-SiO_2-Ga_2O_3 glasses

摘要

The broadband near-IR emission has been investigated in a series of Er/Tm co-doped Bi_2O_3-SiO_2-Ga_2O_3 (BSG) glasses with 800 nm laser diode as an excitation source. A broadband emission extending from 1350 to 1650 nm with a full width at half maximum (FWHM) around 165 nm is obtained in 0.2 wt Er_2O_3 and 1.0 wt Tm_2O_3 co-doped BSG glass. The fluorescence decay curves of glasses are measured and maximum energy transfer efficiency from Er~(3+) to Tm~(3+) reaches 71 when Tm~(3+) concentration is 1.0 wt. The temperature dependence of the broadband emission spectra in Er 3+-Tm 3+ co-doped BSG glass is also recorded to further understand the energy-transfer processes between Er~(3+) and Tm~(3+). The present work suggests that Er/Tm co-doped BSG glasses can be a potential candidate for broadband integrated amplifier.