Thulium-doped germanate glass composition and device for optical amplification
US6589895B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2001 |
| Grant date | Jul 8, 2003 |
| Priority date | — |
| Expiry date | Jun 29, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/1616
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A Tm-doped germanate glass composition comprises GeO2 having a concentration of at least 20 mole percent, Tm2O3 having a concentration of about 0.001 mole percent to about 2 mole percent, and Ga2O3, having a concentration of about 2 mole percent to about 40 mole percent. The composition can further include an alkaline earth metal compound selected from the group consisting of MgO, CaO, SrO, BaO, BaF2, MgF2, CaF2, SrF2, BaCl2, MgCl2, CaCl2, SrCl2, BaBr2, MgBr2, CaBr2, SrBr2, and combinations thereof, and having a non-zero concentration of less than about 40 mole percent. The composition can further include an alkali metal compound selected from the group consisting of Li2O, Na2O, K2O, Rb2O, Cs2O, Li2F2, Na2F2, K2F2, Rb2F2, Cs2F2, Li2Cl2, Na2Cl2, K2Cl2, Rb2Cl2, Cs2Cl2, Li2Br2, Na2Br2, K2Br2, Rb2Br2, Cs2Br2 and combinations thereof, and having a non-zero concentration of less than about 20 mole percent. The emission bandwidth of the composition in the 1450 nm to 1530 nm range can be varied on the basis of one or more composition ratios. A Tm-doped germanate optical amplifier can amplify optical signals in the S-band region of the electromagnetic spectrum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.