| ชื่อเรื่อง | : | Spectroscopic investigations of Nd3+doped gadolinium calcium silica borate glasses for the NIR emission at 1059 nm |
| นักวิจัย | : | Kesavulu C. , Kim H. , Lee S. , Kaewkhao J. , Wantana N. , Kaewnuam E. , Kothan S. , Kaewjaeng S. |
| คำค้น | : | - |
| หน่วยงาน | : | มหาวิทยาลัยเชียงใหม่ |
| ผู้ร่วมงาน | : | - |
| ปีพิมพ์ | : | 2560 |
| อ้างอิง | : | 09258388 , 2-s2.0-84994692144 , 10.1016/j.jallcom.2016.11.002 , https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84994692144&origin=inward , http://cmuir.cmu.ac.th/jspui/handle/6653943832/41084 |
| ที่มา | : | - |
| ความเชี่ยวชาญ | : | - |
| ความสัมพันธ์ | : | - |
| ขอบเขตของเนื้อหา | : | - |
| บทคัดย่อ/คำอธิบาย | : | © 2016 Elsevier B.V. The Nd 3+ -doped gadolinium calcium silica borate (BSGdCaNd) glasses of composition (55-x) B 2 O 3 - 10 SiO 2 - 25 Gd 2 O 3 -10 CaO -x Nd 2 O 3 , where x = 0.0, 0.05, 0.5, 1.0, 1.5, 2.0 and 2.5 mol %, have been prepared by conventional melt quenching technique and are characterized through structural, thermal, absorption, emission and decay time measurements. Based on the Judd-Ofelt intensity parameters and radiative properties were determined from the absorption spectrum. The emission spectra recorded for BSGdCaNd glasses gives three emission transitions 4 F 3/2 → 4 I 9/2 (903 nm), 4 F 3/2 → 4 I 11/2 (1059 nm) and 4 F 3/2 → 4 I 13/2 (1334 nm) for which effective bandwidths (Δλ eff ) and stimulated emission cross-section (σ(λp)) are evaluated. Branching ratios (β R ) measured for BSGdCaNd0.5 glass show that 4 F 3/2 → 4 I 11/2 transition is quite suitable for lasing applications. The intensity of emission spectra increases with increase in the concentration of Nd 3+ ion up to 1.0 mol% and beyond that concentration, quenching is observed. The decay from 4 F 3/2 level is found to be non-exponential nature for concentrations of Nd 3+ ions. The non-exponential curve has been fitted to the Inokuti-Hirayama model to understand the nature of energy transfer process. Hence, the high emission cross-section (1.39 × 10 −20 cm 2 ), branching ratio (0.58) and long lifetime (342 μs) indicate that the BSGdCaNd0.5 glass system could be considered as a good candidate for strong NIR lasers at 1059 nm. |
| บรรณานุกรม | : |
Kesavulu C. , Kim H. , Lee S. , Kaewkhao J. , Wantana N. , Kaewnuam E. , Kothan S. , Kaewjaeng S. . (2560). Spectroscopic investigations of Nd3+doped gadolinium calcium silica borate glasses for the NIR emission at 1059 nm.
เชียงใหม่ : มหาวิทยาลัยเชียงใหม่ . Kesavulu C. , Kim H. , Lee S. , Kaewkhao J. , Wantana N. , Kaewnuam E. , Kothan S. , Kaewjaeng S. . 2560. "Spectroscopic investigations of Nd3+doped gadolinium calcium silica borate glasses for the NIR emission at 1059 nm".
เชียงใหม่ : มหาวิทยาลัยเชียงใหม่ . Kesavulu C. , Kim H. , Lee S. , Kaewkhao J. , Wantana N. , Kaewnuam E. , Kothan S. , Kaewjaeng S. . "Spectroscopic investigations of Nd3+doped gadolinium calcium silica borate glasses for the NIR emission at 1059 nm."
เชียงใหม่ : มหาวิทยาลัยเชียงใหม่ , 2560. Print. Kesavulu C. , Kim H. , Lee S. , Kaewkhao J. , Wantana N. , Kaewnuam E. , Kothan S. , Kaewjaeng S. . Spectroscopic investigations of Nd3+doped gadolinium calcium silica borate glasses for the NIR emission at 1059 nm. เชียงใหม่ : มหาวิทยาลัยเชียงใหม่ ; 2560.
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