Claims
- 1. A single mode optical waveguide fiber comprising a dispersion zero wavelength which is >1575 nm; a dispersion slope which is <0.1 ps/nm2-km; a mode field diameter >7.9 and having a refractive index profile having at least three segments having refractive index Δ1, Δ2, and Δ3, wherein Δ1 is >Δ3 is >Δ2 and the refractive index profile of the core is selcted to result in an attenuation which is <0.203 db/km, at 1550 nm.
- 2. The single mode optical waveguide fiber of claim 1 wherein attenuation at 1550 nm is less than or equal to 0.19 dB/km.
RELATED APPLICATIONS
This application is a continuation application filed under 37 CRF 1.53(b), which claims priority to and incorporates by reference pending prior application Ser. No. 09/641,019, filed on Aug. 17, 2000 now U.S. Pat. No. 6,282,354, entitled LOW ATTENUATION OPTICAL FIBER, which application has been allowed, and was a continuation of U.S. application Ser. No. 09/145,755, filed Sep. 2, 1998, which application has now granted and is now U.S. Pat. No. 6,134,367, which claimed the benefit of and priority to U.S. provisional application Ser. No. 60/058,774, filed Sep. 12,1997.
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Provisional Applications (1)
|
Number |
Date |
Country |
|
60/058774 |
Sep 1997 |
US |
Continuations (2)
|
Number |
Date |
Country |
Parent |
09/641019 |
Aug 2000 |
US |
Child |
09/898620 |
|
US |
Parent |
09/145755 |
Sep 1998 |
US |
Child |
09/641019 |
|
US |