Low loss optical fiber designs for confining optical power...

Details Low loss optical fiber designs for confining optical power... Low loss optical fiber designs for confining optical power...

2009-03-10

2011-12-06

Ullah, Akm (Department: 2874)

Optical waveguides

Optical fiber waveguide with cladding

Utilizing multiple core or cladding

C065S391000

Reexamination Certificate

active

08073301

ABSTRACT:
The specification describes an improved optical fiber produced by a hybrid VAD/MCVD process. The core of the fiber is produced using VAD and the inner cladding layer has a depressed index and is produced using MCVD. In preferred embodiments, the optical power envelope is essentially entirely contained in VAD produced core material and the MCVD produced depressed index cladding material. Optical loss is minimized by confining most of the optical power to the VAD core where OH presence is low, as well as by maximizing the optical power in the un-doped silica region. The MCVD substrate tube material is essentially devoid of optical power.

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