Long wavelength, pure silica core single mode fiber and...

Details Long wavelength, pure silica core single mode fiber and... Long wavelength, pure silica core single mode fiber and...

2005-09-20

2005-09-20

Healy, Brian (Department: 2883)

Optical waveguides

Optical fiber waveguide with cladding

C385S126000, C385S144000

Reexamination Certificate

active

06947650

ABSTRACT:
An optical fiber suitable to support single mode optical transmission at longer wavelengths (e.g., 1550 nm) is formed to comprise a pure silica core region and a “down doped” cladding layer. The core region is defined as having a diameter d and the cladding layer is defined has having an outer diameter D. In accordance with the present invention, single mode propagation will be supported when D/d>8.5, and is preferably in the range of 9–10.

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