Optical waveguides – Optical transmission cable – Tightly confined
Patent
1991-02-19
1992-07-14
Ullah, Akm E.
Optical waveguides
Optical transmission cable
Tightly confined
385107, 385113, 174 20, G02B 644
Patent
active
051310643
ABSTRACT:
A communications cable for use in buried environments in an outside plant includes a core (22) comprising at least one transmission medium and a mechanically strengthened, thermal resistant barrier layer (40) disposed about a plastic tubular member (23). A metallic shield (32) and a plastic jacket (36) are disposed about the barrier. The barrier layer may comprise a tape (41) which is made of a material such as woven glass or an aramid fibrous material, for example, which is resistant to relatively high temperatures, which has suitable strength properties in all directions and at elevated temperatures and which is characterized by properties which cause the barrier layer to impede the passage therethrough of particles which are sufficiently large to cause damage to the core. In a preferred embodiment, the thermal barrier layer also includes provisions for preventing the longitudinal flow of water within the cable. Such a waterblocking capability may be provided by a barrier layer comprising a laminate comprising a high temperature resistant tape and at least one other tape with a superabsorbent powder therebetween or another tape which has been impregnated with a superabsorbent material.
REFERENCES:
patent: 4557560 (1985-12-01), Bohannon, Jr. et al.
patent: 4781433 (1988-11-01), Arroyo et al.
patent: 4818060 (1989-04-01), Arroyo
patent: 4836640 (1989-06-01), Gartside, III et al.
patent: 4867526 (1989-09-01), Arroyo et al.
patent: 4874219 (1989-10-01), Arroyo et al.
patent: 4946237 (1990-08-01), Arroyo et al.
patent: 4971419 (1990-11-01), Gartside et al.
patent: 5013127 (1991-07-01), Bernard
Arroyo Candido J.
Hardwick, III Nathan E.
Kinard Michael D.
Liu Wing S.
Patel Parbhubhai D.
AT&T Bell Laboratories
Heartney Phan T.
Somers Edward W.
Ullah Akm E.
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