High fiber count optical fiber cable with buffer tubes...

Details High fiber count optical fiber cable with buffer tubes... High fiber count optical fiber cable with buffer tubes...

2005-03-22

2005-03-22

Glick, Edward J. (Department: 2882)

Optical waveguides

Optical transmission cable

Loose tube type

C385S109000, C385S113000, C385S114000

Reexamination Certificate

active

06870995

ABSTRACT:
Optical fiber cable with a central strength member structure and with four or five buffer tubes each loosely receiving optical fiber ribbons in a stack and is disposed around and contacting the strength member. The optical fiber count is in excess of 1000 and the fill factor is not greater than 85% in a two inch duct. Each buffer tube contacts adjacent buffer tubes, and the buffer tubes are encircled by a jacket. Optionally, spaces bounded by pairs of buffer tubes and the jacket have optical fibers therein and can also include flexible longitudinal strength members and/or water blocking filaments. Preferably, the strength member structure and/or the buffer tubes are encircled by a water blocking tape. The optical fiber ribbons in the stacks can include different numbers of fibers, and hence, can have different width.

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The Status and Future of High Fiber Count Cable Designs, Eric R. Logan, et al—Int'l. Wire & Cable Symposium Proceedings 1999.

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