5 April 2016 Phosphate content influence on structural, spectroscopic, and lasing properties of Er,Yb-doped potassium-lanthanum phosphate glasses
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Abstract
The influence of the phosphorus pentoxide (P2O5) content on the material properties of Er,Yb-doped potassium-lanthanum phosphate glass was studied. Glass samples of the following nominal composition 35.0K2O-6.8Yb2O3-8.0La2O3-0.2Er2O3-50.0P2O5 (in mol%) were prepared from starting materials mixed with five additional amounts of P2O5 (0, 7.5, 15.0, 30.0, and 45.0 mol% related to the nominal glass composition). The P2O5 addition influence on properties of prepared glasses was studied using Raman, absorption, and fluorescence spectroscopy. The glass residual IR absorption and Judd–Ofelt intensity parameters together with absorption and emission cross sections were estimated. The results showed the increasing polymerization of glass and the P─O bond shortening with P2O5 content increase. The spectroscopy of Er3+ and Yb3+ ions was affected only marginally by the glass composition. It was found that fluorescence decay time corresponding to upper-laser-level 4I13/2 increased with the decrease of P2O5 content in the glasses, which was related to increasing OH− contamination of the glass. The laser action at 1.53  μm under 975-nm pulsed laser diode pumping was successfully demonstrated. Low threshold and laser slope efficiency up to 21% in respect to absorbed pumping power were obtained.
© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
Jan Šulc, Jan Šulc, Richard Švejkar, Richard Švejkar, Helena Jelínková, Helena Jelínková, Karel Nejezchleb, Karel Nejezchleb, Karel Nitsch, Karel Nitsch, Antonín Cihlár, Antonín Cihlár, Robert Král, Robert Král, Martin Ledinsky, Martin Ledinsky, Antonn Fejfar, Antonn Fejfar, Miroslava Rodov, Miroslava Rodov, Petra Zemenová, Petra Zemenová, Martin Nikl, Martin Nikl, } "Phosphate content influence on structural, spectroscopic, and lasing properties of Er,Yb-doped potassium-lanthanum phosphate glasses," Optical Engineering 55(4), 047102 (5 April 2016). https://doi.org/10.1117/1.OE.55.4.047102 . Submission:
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