I/We claim:
1. An optical fiber cable (100) comprising:
a. a central core (102) comprising a plurality of sub units (104) enclosing a
plurality of optical fibers (106);
5 b. an armor layer (108) enclosing the central core;
c. a protective layer (110) located between the armor layer (108) and the
central core; and
d. an outer cable jacket (112).
10 2. The optical fiber cable (100) as claimed in claim 1, wherein said sub unit (104) has wall
thickness in the range of 0.05 mm to 0.3 mm.
3. The optical fiber cable (100) as claimed in claim 1, wherein the plurality of optical fibers
(106) in at least a sub unit (104) are arranged in the form of intermittently bonded ribbons
15 (IBRs).
4. The optical fiber cable (100) as claimed in claim 1, wherein the armor layer (108) is
selected from the group consisting of corrugated steel tape, aluminum tape, spiral
interlocking steel, and spiral interlocking aluminum.
20
5. The optical fiber cable (100) as claimed in claim 1, wherein the protective layer (110)
material is selected from the group consisting of barrier tape, water swellable tape,
polyester tape, aramid yarn, IGFR yarns, polymeric yarns, and combinations thereof.
25 6. The optical fiber cable (100) as claimed in claim 1, wherein the protective layer (110) is
restrictively wrapped around the plurality of sub units (104).
7. The optical fiber cable (100) as claimed in claim 1, wherein the protective layer (110)
has a thickness in range 0.1-1 mm.
30
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8. The optical fiber cable (100) as claimed in claim 1, comprising at least a strength
member (114) partially or fully embedded in the outer cable jacket (112).
9. The optical fiber cable (100) as claimed in claim 1, comprising at least a strength
5 member (114) located in the central core (102).
10. The optical fiber cable (100) as claimed in claims 8-9, wherein at least a strength member
(114) is coated with any one or more of non-abrasive material, adhesive material, water
absorbent material, and combinations thereof.
10
11. The optical fiber cable (100) as claimed in claim 10, wherein the strength member (114)
is selected from the group consisting of steel wires, aramid reinforced plastic (ARP),
fiber reinforced plastic (FRP), glass reinforced plastic (GRP), aramid yarn, and
impregnated glass fiber reinforcement (IGFR).
15
12. The optical fiber cable (100) as claimed in claim 1, comprising at least a water-absorbent
material enclosed within the plurality of sub units (104), or additionally between the
plurality of sub units (104)