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Titolo:
DY3-CODOPED AND ER3+-CODOPED YBR3 UP-CONVERSION PHOSPHOR FOR DETECTION OF 1.3-MU-M BAND INFRARED LIGHT()
Autore:
OHWAKI J; OTSUKA M;
Indirizzi:
NIPPON TELEGRAPH & TEL PUBL CORP,OPTOELECT LABS IBARAKI OSAKA 31911 JAPAN SUMITA OPT GLASS INC,DIV RES & DEV URAWA SAITAMA 338 JAPAN
Titolo Testata:
Electronics & communications in Japan. Part 2, Electronics
fascicolo: 8, volume: 79, anno: 1996,
pagine: 23 - 30
SICI:
8756-663X(1996)79:8<23:DAEYUP>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
VISIBLE UP-CONVERSION; MU-M; ENERGY-TRANSFER; BACL2; 1.5-MU-M; ER-3+;
Keywords:
WAVELENGTH UP-CONVERSION; FLUORESCENCE; DYSPROSIUM; ERBIUM; BROMIDE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
18
Recensione:
Indirizzi per estratti:
Citazione:
J. Ohwaki e M. Otsuka, "DY3-CODOPED AND ER3+-CODOPED YBR3 UP-CONVERSION PHOSPHOR FOR DETECTION OF 1.3-MU-M BAND INFRARED LIGHT()", Electronics & communications in Japan. Part 2, Electronics, 79(8), 1996, pp. 23-30

Abstract

The efficient upconversion of 1.3-mu m infrared light to visual lightwas investigated using YBr3:Dy-3, E(r)(3+) fluorescent material. Whenthe fluorescent material with an optimum composition (2DyBr(3):20ErBr(3):78YBr(3)) was illuminated with 1.3-mu m laser beam from a semiconductor laser (LD 5 mW), the intensities of the colors red (Er3+:F-4(9/2) --> I-4(15/2) radiation transition) and green (Er3+:S-4(3/2) --> I-4(15/2) radiation transition) emitted from the fluorescent material were about 170 and 60 times stronger, respectively, than those from chloride-based fluorescent material. When this fluorescent material is illuminated by collimated LD beam with power higher than 1 mW, it continuously emits visual light (yellow) without preexcitation. Therefore, 1.3-mu m infrared light can be detected visually under room light. This bromide-based fluorescent material is stable when it is packaged in a sealed dry atmosphere and its high efficiency wavelength upconversion characteristic is maintained over a year. In this material, Dy3+ acts as an absorption center of 1.3-mu m light (6(15/2) --> H-6(9/2) transition) and fluorescence is caused by energy transmission to the Er3+ light-emission center due to suppression of muitiphonon relaxation from the Dy3+ excitation level. The high efficiency also results because a large number of Dy3+ absorption centers can be added due to the low energy-transfer efficiency in the bromide-based material. This paper alsodescribes the wavelength conversion process and the reverse transfer process from Er3+ to Dy3+.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/09/18 alle ore 08:57:37