Low thermal skew fiber optic cable

Details Low thermal skew fiber optic cable Low thermal skew fiber optic cable

1998-01-13

2000-02-22

Palmer, Phan T. H.

Optical waveguides

Optical transmission cable

Tightly confined

385112, 385101, 385114, G02B 644

Patent

active

060289759

ABSTRACT:
A fiber optic cable is provided with a thermal shield which consists (proceeding outward from the cable) of a temperature insulating layer of a foam plastic such as polyethylene, a plastic film wrap such as aluminized nylon, a metallic braid such as tinned copper and an outer jacket of plastic as additional temperature insulation and to facilitate pulling the cable. The film wrap and outer jacket are optional. For further shielding a second layer of foam plastic may be positioned outside the first metallic braid followed by a second plastic film wrap, a second metallic braid and an outer plastic jacket. If the shielded cable is near a source of heat, such as a hot water pipe or an air conditioning duct, the fiber optic cable temperature is uniform throughout its cross-section. Without the thermal shield instability of the signals in different fibers may occur because of heat differential.

REFERENCES:
patent: 4304462 (1981-12-01), Baba et al.
patent: 4514036 (1985-04-01), McDonald
patent: 4547626 (1985-10-01), Pederson et al.
patent: 5268971 (1993-12-01), Nilsson et al.
patent: 5703984 (1997-12-01), Carratt et al.
patent: 5838862 (1998-11-01), Chien

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