Abstract
A series of new glasses of 70TeO 2-(20− x) ZnO– xGeO 2–5La 2O 3–2.5K 2O–2.5Na 2O (mol%) doped with Yb 3+ is presented. Thermal analysis, spectra and laser properties of Yb 3+ ions have been measured. It is found that 70TeO 2–20GeO 2–5La 2O 3–2.5K 2O–2.5Na 2O composition glass had better thermal stability than 75TeO 2–20ZnO–5Na 2O glass, higher stimulated emission cross-section of 1.23 pm 2 for the 2 F 5/2→ 2 F 7/2 transition close to PN glass, lower minimum pump intensity of 0.98 KW/cm 2 , long fluorescence lifetime of 0.92 ms and the broad fluorescence effective line width of 77 nm . Evaluated from the good potential laser parameters, this system glass is a promising host of miniature solid lasers such as short pulse generation in diode pumped lasers, short pulse generation tunable lasers, high-peak power and high-average power lasers, etc.
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