Glass composition for glass substrates containing optical waveguides
AssigneeCorning Incorporated
InventorsLars Martin Otfried Brusberg, Matthew John Dejneka
Life of this patent
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Abstract
Disclosed herein are embodiments of a glass composition including SiO2 in an amount in a range from 53 mol % to 84 mol %, Al2O3 in an amount in a range from 0.3 mol % to 20 mol %, Na2O in an amount in a range from 3 mol % to 16 mol %, and at least one of Cs2O or Rb2O in an amount in a range from 0.05 mol % to 8 mol %. The glass composition has a first silver ion diffusivity at 110° C. of 5×10−19 m2/s or less, and the glass composition has a second silver ion diffusivity at 350° C. of at least 5×10−17 m2/s at 350° C. The glass composition is particularly suitable for use as a glass substrate of a photonic chip package.
Claims20
A glass article, comprising:
- a glass substrate comprising glass having a composition, in terms of mol % on a representative oxide basis, comprising:
- SiO2 in an amount in a range from 53 mol % to 84 mol %;
- Al2O3 in an amount in a range from 0.3 mol % to 20 mol %;
- Na2O in an amount in a range from 3 mol % to 16 mol %;
- and
- Cs2O in an amount in a range from 0.05 mol % to 8 mol %;
- a first major surface of the glass substrate;
- a second major surface of the glass substrate opposite to the first major surface;
- a waveguide comprising silver disposed in the glass substate between the first major surface and the second major surface, and closer to the first major surface than the second major surface.
A glass article, comprising:
- a glass substrate comprising glass having a composition, in terms of mol % on a representative oxide basis, comprising:
- SiO2 in an amount in a range from 53 mol % to 84 mol %;
- Al2O3 in an amount in a range from 0.3 mol % to 20 mol %;
- Na2O in an amount in a range from 3 mol % to 16 mol %;
- and
- Cs2O in an amount in a range from 0.05 mol % to 8 mol %;
- a first major surface of the glass substrate;
- a second major surface of the glass substrate opposite to the first major surface;
- a waveguide disposed in the glass substate between the first major surface and the second major surface, and closer to the first major surface than the second major surface;
- wherein the waveguide has a refractive index profile comprising a first refractive index (ns) at the first major surface, a bulk refractive index (n0) of the glass, and a maximum refractive index (n1) within the waveguide such that n0<n1 and such that n0≤ns.
A glass article, comprising:
- a glass substrate comprising glass having a composition, in terms of mol % on a representative oxide basis, comprising:
- SiO2 in an amount in a range from 53 mol % to 84 mol %;
- Al2O3 in an amount in a range from 0.3 mol % to 20 mol %;
- B2O3 in an amount in a range from 4 mol % to 15 mol %;
- Na2O in an amount in a range from 3 mol % to 16 mol %;
- and
- Cs2O in an amount in a range from 0.05 mol % to 8 mol %;
- alkaline earth metal oxides of the group consisting of MgO, CaO, and SrO, wherein a sum of the alkaline earth metal oxides of the group is in a range of 1 mol % to 16 mol %
- a first major surface of the glass substrate;
- a second major surface of the glass substrate opposite to the first major surface;
- a waveguide comprising silver disposed in the glass substate between the first major surface and the second major surface,
- wherein the waveguide has a refractive index profile comprising a first refractive index (ns) at the first major surface, a bulk refractive index (n0) of the glass, and a maximum refractive index (n1) within the waveguide such that n0<n1 and such that n0≤ns.
Dependencies are inferred from the claim text.