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Spectroscopic Properties of Yb3+-Doped Silicate Glasses

Abstract Yb3+-doped silicate glasses (SiO2–Nb2O5–K2O–ZnF2) were prepared by a conventional melt quenching technique and their spectroscopic properties were investigated. The emission cross-section was found to be 0.53×10−20 cm2 at 1006 nm from the reciprocity method described by McCumber from the measured absorption spectrum of 1.0 mol% Yb2O3-doped glass. The lifetime (τexp) and figure of merit (σem×τexp) for the 2F5/2→2F7/2 transition of 1.0 mol% Yb2O3 -doped silicate glass, were evaluated to be 0.50 ms and 0.26 cm2 ms, respectively. The other spectroscopic parameters, βmin, Isat and Imin were found to be 0.17, 29.00 kW/cm2 and 4.90 kW/cm2, respectively. The results indicate that the present Yb3+-doped silicate glasses could be useful as laser gain media at 1006 nm.