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US 8,951,925 B2Granted
Broadening the rare earth ion emission bandwidth, increasing emission cross section, and/or shifting peak emission wavelength in Nd-doped aluminate or silicate glasses
AssigneeSchott AG
InventorsSimi George, Nathan Carlie, Sally Pucilowski, Joseph Hayden
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Abstract
The invention relates to a Nd-doped, aluminate-based or silicate-based, laser glass having a peak emission wavelength that is longer than 1059.7 nm, an emission cross section (σem) of ≧1.5×10−20 cm2, and/or an emission bandwidth (Δλeff) of ≧28 nm, while maintaining properties that render the glass suitable for commercial use, such as low glass transition temperature Tg and low nonlinear index, n2.
Claims27
A Nd-doped aluminate glass composition comprising (based on mol %):
- Al2O3
- 0.00-40.00
- CaO
- 20.00-65.00
- BaO
- 0.0-8.00
- SiO2
- 0.0-21.00
- B2O3
- 0.0-40.00
- Nd2O3
- 0.25-4.00
- Ga2O3
- 0.00-40.00
- ZrO2
- 0.00-10.00
- Y2O3
- 0.00-10.00
- Nb2O5
- 0.00-10.00
- Bi2O3
- 0.00-10.00
- ZnO
- 0.00-10.00
- wherein
- the glass contains at least 5.0 mol % Ga2O3, 1.0 mol % ZrO2, 0.05 mol % Y2O3, 1.0 mol % Nb2O5, 0.5 mol % Bi2O3, or 0.5 mol % ZnO,
- the sum of Al2O3, Ga2O3, ZrO2, Y2O3, Nb2O5, B2O3, Bi2O3, and ZnO is not more than 60 mol %,
- the glass composition exhibits a peak emission wavelength of longer than 1059.7 nm, and/or an emission cross section (σem) of ≧1.5×10−20 cm2, and/or an emission bandwidth (Δλeff) of ≧25 nm, and
- the glass has a glass transition temperature Tg of less than 850° C., and a nonlinear index, n2, of <4.0.
26 more elements
Dependencies are inferred from the claim text.