High temperature, zero fiber strain, fiber optic cable
A cable including an outer metal tube and a first layer wire inside the outer metal tube, wherein the first layer wire has five inner elements surrounding a metallic center member and at least one of the inner elements is a metal tube containing an optical fiber.
1. A cable, comprising:
an outer metal tube; and
a first layer wire inside said outer metal tube;
wherein said first layer wire consists of five metallic inner elements surrounding a solid metallic center member;
wherein at least a first one of said metallic inner elements is a metal tube containing containing an optical fiber, and wherein at least a second one of said metallic inner elements is free from optical fibers and is a metal tube with a metal filler.
2. The cable of claim 1 , wherein said outer tube comprises stainless steel.
3. The cable of claim 1 , wherein at least one of said inner elements comprises stainless steel.
4. The cable of claim 1 , wherein said cable has zero fiber strain up to at least approximately 600 degrees C.
5. The cable of claim 1 , wherein four of said inner elements are metal tubes with metal fillers.
6. The cable of claim 1 , wherein the five inner elements are helically wound around the metallic center member.
7. A cable, comprising:
an outer metal tube; and
a first layer wire inside said outer metal tube;
wherein said first layer wire consists of three metallic inner elements;
wherein at least a first one of said metallic inner elements is a metal tube containing an optical fiber, and wherein at least a second one of said metallic inner elements is free from optical fibers and is a metal tube with a metal filler.
8. The cable of claim 7 , wherein said outer tube comprises stainless steel.
9. The cable of claim 7 , wherein at least one of said inner elements comprises stainless steel.
10. The cable of claim 7 , wherein said cable has zero fiber strain up to at least approximately 600 degrees C.
11. The cable of claim 7 , wherein two of said inner elements are metal tubes with metal fillers.
12. The cable of claim 7 , wherein the three inner elements are helically wound.