Back to results
US 6,757,474 B2Granted
Emission silicate waveguide compositions for enhanced L-band and S-band emission
Assignee3M Innovative Properties Company
InventorsMark T. Anderson, Craig R. Schardt, James R. Onstott, Kenton D. Budd
Life of this patent
Estimating the term…
Abstract
A co-doped silicate optical waveguide having a core including silica, and oxides of aluminum, germanium, erbium and thulium. The composition concentrations are: Er from 15 ppm to 3000 ppm; Al from 0.5 mol % to 12 mol %; Tm from 15 ppm to 10000 ppm; and Ge from 1 mol % to 20 mol %. In a specific embodiment, the concentration of Er is from 150 ppm to 1500 ppm; Al is from 2 mol % to 8 mol %; and Tm is from 15 ppm to 3000 ppm. A boron-less cladding surrounds the core.
Claims20
A silicate optical waveguide comprising:
- a) a core comprising silica, and oxides of Al, Ge, Er, and Tm;
- i) wherein the concentration of Er is from 15 ppm to 3000 ppm,
- ii) the concentration of Al is from 0.5 mol % to 12 mol %,
- iii) the concentration of Tm is from 15 ppm to 10000 ppm, and
- iv) the concentration of Ge is from 1 mol % to 20 mol %;
- and
- b) a boron-free cladding immediately surrounding the core.
4 more elements
A silicate optical fiber comprising:
- a) a core comprising silica, and oxides of Al, Ge, Er, and Tm;
- i) wherein the concentration of Er is from 15 ppm to 3000 ppm,
- ii) the concentration of Al is from 0.5 mol % to 12 mol %,
- iii) the concentration of Tm is from 15 ppm to 10000 ppm, and
- iv) the concentration of Ge is from 1 mol % to 20 mol %;
- b) wherein the intensity of the spontaneous emission at 1600 nm is no less than −8.8 dB relative to the maximum emission intensity at ˜1.53 μm and wherein the intensity of the spontaneous emission at 1650 nm is no less than −14.4 dB relative to the maximum emission intensity at ˜1.53 μm.
3 more elements
Dependencies are inferred from the claim text.