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Sains Malaysiana 43(6)(2014): 843–850
Spectroscopic
Studies of Er3+-Yb3+
Codoped Multicomposition Tellurite Oxide Glass (Kajian Spektroskopi
Kaca Telurit Teroksida Pelbagai Kandungan Terdop Er3+-Yb3+)
S.O. BAKI1*, L.S.
TAN2, C.S.
KAN2, H.M.
KAMARI3, A.S.M.
NOOR4& M.A. MAHDI4 1Centre
of Foundation Studies for Agriculture Science, Universiti Putra
Malaysia, 43400 UPM
Serdang, Selangor, Malaysia
2Aseptec Sdn Bhd.,
53-1, Jalan Equine 9, Taman Equine, Bandar Putra Permai, 43300 Seri
Kembangan Selangor, Malaysia
3Department of Physics,
Faculty of Science, Universiti Putra Malaysia 43400 UPM Serdang,
Selangor, Malaysia
4Wireless and Photonic
Networks Research Center, Faculty of Engineering, Universiti Putra
Malaysia, 43400 UPM Serdang, Selangor, Malaysia
Diserahkan: 4 Mei
2013/Diterima: 13 Disember 2013
ABSTRACT
Multicomposition of Er3+-Yb3+
codoped tellurite oxide, TeO2-ZnO-PbO-TiO2-Na2O
glass has been investigated. A detailed spectroscopic study of the
Judd-Ofelt analysis has been performed from the measured absorption
spectrum in order to obtain the intensity parameters Ωt (t=2, 4, 6). The calculated
Ωt
values were then utilized in the determination of
transition probabilities, radiative lifetimes and branching ratios
of the Er3+
transitions between the J(upper)-J’(lower) manifolds.
Both visible upconversion and near-infrared spectra were characterized
under the 980 nm laser diode excitation at room temperature.
Keywords: Judd-Ofelt analysis;
tellurite oxide glas; upconversion
ABSTRAK
Kaca telurit teroksida pelbagai kandungan
TeO2-ZnO-PbO-TiO2-Na2O
terdop Er3+-Yb3+ telah
dikaji. Penyelidikan terperinci terhadap spektroskopi melalui analisis
Judd-Ofelt telah dilakukan hasil daripada cerapan spektrum penyerapan
untuk mendapatkan pemboleh ubah keamatan Ωt (t=2, 4, 6). Hasil pengiraan
nilai Ωt telah digunakan dalam penentuan kebarangkalian peralihan,
tempoh hayat sinaran dan nisbah cabangan peralihan Er3+
di antara jaluran J(atas)-J’(bawah). Spektra
bagi anjakan-atas cahaya nampak dan infra-merah dekat telah dicirikan
melalui pengujaan laser diod 980 nm pada suhu bilik. Kata kunci: Analisis Judd-Ofelt; anjakan-atas; kaca telurit teroksida RUJUKAN
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*Pengarang untuk surat-menyurat; email: sharudinomar@upm.edu.my
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