| Sensitized Up—Conversion Luminescence of Ho^3＋ in Nd^3＋—Yb^3＋—Ho^3＋ Co—doped ZrF4—Based Glass |
| |
| 摘 要： |
|
| 关 键 词： | 重金属氟化玻璃 激光器玻璃 大功率激光二极管 频率转换 |
| 收稿时间： | 21 May 2001 |
Sensitized up-conversion luminescence of Ho3+ in Nd3+-Yb3+-Ho3+ co-doped ZrF4-based glass |
| |
| Authors: | S F Shaukat Ph D Ya-Ming Dong Ph D M Hussain R Farooq Guang-Yuan Li |
| |
| Institution: | (1) Department of Physics, East China University of Science and Technology, 200237 Shanghai, China;(2) Department of Physics, Government College, S/Town, R. Pindi, Pakistan |
| |
| Abstract: | Up-conversion processes for the blue, green and red emissions were found two-photon phenomenon, known as the cooperative phenomenon.
This phenomenon was assisted by Nd3+ → Yb3+ → Ho3+ energy transfer. The strong green emission due to the Ho3+ : (5F4, 5S2)→ 5I8 transitions was observed in Nd3+-Ho3+ co-doped ZrF4-based fluoride glasses under 800 nm excitation. As an attempt to enhance Ho3+ up-conversion luminescences in the Nd3+ – Ho3+ co-doped ZrF4-based glasses, Yb3+ ions were added to the glasses. As a result it was found that, in 800 nm excitation of 60 ZrF4. 30BaF2. (8-x)LaF3. lNdF3. xYbF3. 1HoF3 glasses (x=0 to 7), sensitized up-conversion luminescences are observed at around 490 nm (blue), 545 nm (green), and 650 nm (red), which
correspond to the Ho3+ : 5F3 → 5I8, ( 5F4, 5S2)→5I8 and 5F5→ 5I8 transitions respectively. The intensities of the green and red emissions in a 3 mol % YbF3-containing glass were about 50 times stronger than those glasses without YbF3. This is based on sensitization due to Yb3+ ions. In particular, the green emission was extremely strong and the Nd3+-Yb3+-Ho3+ co-doped ZrF4-based glasses have a high possibility of realizing a green up-conversion laser glass. In this paper the up-conversion mechanism
in the glasses is discussed in detail. |
| |
| Keywords: | heavy metal fluoride glass luminescence up-conversion |
| 本文献已被 SpringerLink 等数据库收录！ |
|
