F. Ansaria G, P. Mahato S. Optical Upconversion Properties Of Tm2O3 / Yb2O3 Doped Lead Tellurite Glasses. IJGASR [Internet]. 2023 Mar. 30 [cited 2024 Nov. 5];2(1):07-12. Available from: https://journals.icapsr.com/index.php/ijgasr/article/view/38