Tm3+-doped silicate glass and the use thereof

Details Tm3+-doped silicate glass and the use thereof Tm3+-doped silicate glass and the use thereof

2005-07-12

2005-07-12

Koslow, C. Melissa (Department: 1755)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C501S064000, C501S054000, C501S072000, C252S30140F, C252S30140H, C428S426000, C428S427000, C428S428000, C385S142000, C385S144000

Reexamination Certificate

active

06916753

ABSTRACT:
The present invention is a thulium doped silicate glass having an excellent fluorescent emission in the 1.4 μm band, and the usage thereof. The silicate glass of this invention includes: 65˜95 mol % SiO2; 0.5˜30 mol % bivalent metal oxide consisting of one or more material selected from ZnO, BaO, SrO and PbO; and 1˜15 mol % of SnO2or TiO2, wherein 3˜30 mol % oxygen of the glass composition are replaced with fluorine, and 0.01˜1 mol % of thulium ions are doped, and the fluorescence lifetime of the3H4level of the Tm3+is more than 50 μs. The silicate glass can be easily formed into a waveguide, such as optical fiber, and it has an excellent ability to splice with the optical fiber for transmission. They have excellent chemical durability and the characteristic of 1.4 μm band fluorescent emission by suppressing the non-radiative transition through multi-phonon relaxation. Thus they have long fluorescence lifetime of the3H4of Tm3+.

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patent: 6287993 (2001-09-01), Fu et al.
Brian Cole, et al.; “S-band amplification in a thulium doped silicate fiber”; OFC 2001; pp. TuQ3-1-3.
Mira Naftaly, et al.; “Tm3+-doped tellurite glass for a broadband amplifier at 1.47 μm”; Applied Optics; vol. 39, No. 27; Sep. 20, 2000; pp. 4979-4984.
T. Komukai, et al.; “1.47 μm Band Tm3+Doped Fluoride Fibre Amplifier Using a 1.064 μm Upconversion Pumping Scheme”; Electronics Letters; Jan. 7, 1993; vol. 29, No. 1; pp. 110-112.

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