Microstructured transmission optical fiber
AssigneeCorning Incorporated
InventorsScott Robertson Bickham, Dana Craig Bookbinder, Ming-Jun Li, Pushkar Tandon
Life of this patent
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Abstract
Microstructured optical fiber for single-moded transmission of optical signals, the optical fiber including a core region and a cladding region, the cladding region including an annular void-containing region that contains non-periodically disposed voids. The optical fiber provides single mode transmission and low bend loss.
Claims6
A method of making an optical fiber comprising randomly distributed voids therein, the method comprising the step of drawing said fiber from a preform comprising randomly distributed voids therein under conditions effective to result in process parameter Ω which is less than 5×10−7, where
- Ω
- =
- D
- gas
- (
- T
- avg
- )
-
- ϕ
- f
-
- L
- root
- V
- f
-
- R
- f
- 2
- and wherein Dgas in cm2/sec is the void gas diffusivity at Tavg, wherein Tavg is the average of the softening point temperature of the optical fiber preform and the peak draw furnace temperature in ° C., φf is the regional void area fraction, Lroot is the draw root length in cm as measured from the beginning of the neck down region and ending when the preform has reached the final fiber draw diameter, Vf is the fiber draw speed in cm/sec and Rf is the final fiber radius in cm.
Dependencies are inferred from the claim text.