JPS5654407A - Submarine optical cable - Google Patents
Submarine optical cableInfo
- Publication number
- JPS5654407A JPS5654407A JP13119379A JP13119379A JPS5654407A JP S5654407 A JPS5654407 A JP S5654407A JP 13119379 A JP13119379 A JP 13119379A JP 13119379 A JP13119379 A JP 13119379A JP S5654407 A JPS5654407 A JP S5654407A
- Authority
- JP
- Japan
- Prior art keywords
- outer layer
- inner layer
- twisting
- layer
- sheath wires
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 title abstract 2
- 239000011295 pitch Substances 0.000 abstract 4
- 239000013307 optical fiber Substances 0.000 abstract 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 239000010949 copper Substances 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
Landscapes
- Insulated Conductors (AREA)
Abstract
PURPOSE: To prevent the breakage of optical fibers at the laying and the increase in light losses by making the twisting directions of the inner layer and outer layer of the sheath wires of a submarine optical cable mutually opposite and specifying the twisting pitch and the number of sheath wires so as to balance the torque produced.
CONSTITUTION: In the submarine cable consisting of a central support 3, an optical fiber core 4, a cushion layer 5, a copper pipe 6, a housing 7 and sheath wires 1, 1', the twisting directions of the inner layer 1, and outer layer 1' of the sheath wires are made mutually opposite and the twisting pitch P1 of the inner layer and the pitch P2 of the outer layer are limited to (P1/D1)/(P2/D2) ≥0.65 when the core diameter of the inner layer is defined as D1 and the core diameter of the outer layer as D2 in order to keep the twisting pitches of the inner and outer layers at 10W20 times the core diameters of the respective layers and cause the elongation characteristics of both to nearly coincide. The number N of wires of the respective layers is made ≤40 pieces and P1/P2 is kept within around 10% of the formula (E1D1 2N1d1 2)/(E2D2 2N2 d2 2). (E is Young's modulus, (d) is the effective as tensile bodies of the sheath wires, affixes 1, 2 show the inner layer and the outer layer respectively). In this way, the rotation during laying of the cable is suppressed, elongation decreased and breakage prevented.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13119379A JPS5654407A (en) | 1979-10-11 | 1979-10-11 | Submarine optical cable |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13119379A JPS5654407A (en) | 1979-10-11 | 1979-10-11 | Submarine optical cable |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5654407A true JPS5654407A (en) | 1981-05-14 |
Family
ID=15052189
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13119379A Pending JPS5654407A (en) | 1979-10-11 | 1979-10-11 | Submarine optical cable |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5654407A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58202403A (en) * | 1982-02-16 | 1983-11-25 | インタ−ナシヨナル・スタンダ−ド・エレクトリツク・コ−ポレイシヨン | Optical fiber cable |
US4705353A (en) * | 1983-03-28 | 1987-11-10 | Schlumberger Technology Corporation | Optical fiber cable construction |
US4775213A (en) * | 1985-07-17 | 1988-10-04 | Sumitomo Electric Industries, Ltd. | Composite overhead stranded conductor having a filler between optical fibers and a protective tube |
JPH0337912A (en) * | 1989-06-29 | 1991-02-19 | American Teleph & Telegr Co <Att> | Electric cable and manufacture thereof |
-
1979
- 1979-10-11 JP JP13119379A patent/JPS5654407A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58202403A (en) * | 1982-02-16 | 1983-11-25 | インタ−ナシヨナル・スタンダ−ド・エレクトリツク・コ−ポレイシヨン | Optical fiber cable |
US4705353A (en) * | 1983-03-28 | 1987-11-10 | Schlumberger Technology Corporation | Optical fiber cable construction |
US4775213A (en) * | 1985-07-17 | 1988-10-04 | Sumitomo Electric Industries, Ltd. | Composite overhead stranded conductor having a filler between optical fibers and a protective tube |
JPH0337912A (en) * | 1989-06-29 | 1991-02-19 | American Teleph & Telegr Co <Att> | Electric cable and manufacture thereof |
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