Abstract
Tm3+-doped lead-silicate glass with good thermal stability was prepared by the melt-quenching method. The absorption spectra, emission spectra, luminescent lifetime, and absorption and emission cross sections of the core glass were measured and analyzed. Then, Tm3+-doped lead-silicate glass photonic crystal fiber (PCF) was successfully drawn with a core diameter of $30~\mu \text{m}$ and a mode-field-area of ± $3160~\mu \text{m}^{2}$ of the emitted fundamental mode. Nearly 2.0- $\mu \text{m}$ amplified spontaneous emission was obtained in a 3.0-cm-long as-drawn PCF. The results indicate that the Tm3+-doped PCF is a promising fiber material for 2.0- $\mu \text{m}$ fiber laser applications.
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