Materials, Photonic Devices, and Sensors

Phosphate content influence on structural, spectroscopic, and lasing properties of Er,Yb-doped potassium-lanthanum phosphate glasses

[+] Author Affiliations
Jan Šulc, Richard Švejkar, Helena Jelínková

Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering Brehová 7, Prague 1, 115 19, Czech Republic

Karel Nejezchleb

Crytur Ltd., Palackého 175, Turnov, 511 01, Czech Republic

Karel Nitsch, Antonín Cihlář, Robert Král, Martin Ledinský, Antonn Fejfar, Miroslava Rodová, Martin Nikl

Institute of Physics CAS, Cukrovarnická 10, Prague 6, 162 00, Czech Republic

Petra Zemenová

Institute of Physics CAS, Cukrovarnická 10, Prague 6, 162 00, Czech Republic

University of Chemistry and Technology Prague, Department of Glass and Ceramics, Technická 5, Prague 6, 166 28, Czech Republic

Opt. Eng. 55(4), 047102 (Apr 05, 2016). doi:10.1117/1.OE.55.4.047102
History: Received December 14, 2015; Accepted March 8, 2016
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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 PO 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 I413/2 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.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Jan Šulc ; Richard Švejkar ; Helena Jelínková ; Karel Nejezchleb ; Karel Nitsch, et al.
"Phosphate content influence on structural, spectroscopic, and lasing properties of Er,Yb-doped potassium-lanthanum phosphate glasses", Opt. Eng. 55(4), 047102 (Apr 05, 2016). ; http://dx.doi.org/10.1117/1.OE.55.4.047102


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