CA1298506C - Optical cable - Google Patents
Optical cableInfo
- Publication number
- CA1298506C CA1298506C CA000559247A CA559247A CA1298506C CA 1298506 C CA1298506 C CA 1298506C CA 000559247 A CA000559247 A CA 000559247A CA 559247 A CA559247 A CA 559247A CA 1298506 C CA1298506 C CA 1298506C
- Authority
- CA
- Canada
- Prior art keywords
- tape
- groove
- optical cable
- bundles
- core
- 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.)
- Expired - Fee Related
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 32
- 239000013307 optical fiber Substances 0.000 claims abstract description 21
- 239000008186 active pharmaceutical agent Substances 0.000 claims abstract description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims 1
- 239000010949 copper Substances 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 3
- 230000001788 irregular Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- YWXYYJSYQOXTPL-SLPGGIOYSA-N isosorbide mononitrate Chemical compound [O-][N+](=O)O[C@@H]1CO[C@@H]2[C@@H](O)CO[C@@H]21 YWXYYJSYQOXTPL-SLPGGIOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/441—Optical cables built up from sub-bundles
- G02B6/4411—Matrix structure
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4407—Optical cables with internal fluted support member
- G02B6/4408—Groove structures in support members to decrease or harmonise transmission losses in ribbon cables
Abstract
ABSTRACT OF THE DISCLOSURE
A tape and slot type optical cable having a core with groove dimensions that hold tape shaped optical fibers and also improve the transmission and mechanical strength characteristics of the optical cable. The dimensions require that for a groove having a depth DS and a width WS and a predetermined plurality n of optical fiber bundles of thickness T and width WT that the equations following equations be satisfied:
A tape and slot type optical cable having a core with groove dimensions that hold tape shaped optical fibers and also improve the transmission and mechanical strength characteristics of the optical cable. The dimensions require that for a groove having a depth DS and a width WS and a predetermined plurality n of optical fiber bundles of thickness T and width WT that the equations following equations be satisfied:
Description
~g850~
OPTICAL CABLE
BACKGROUND OF T~E INVE~
1. Field o~ the Invention This invention relates generally to the structure of high-density optical fiber cables employed in optical communicationnetworks. More particularly, the invention relates to th~
configuration of groo~es in the walls of the core of an optical cable having a plurality of tape~shaped optical fiber bundles therein.
OPTICAL CABLE
BACKGROUND OF T~E INVE~
1. Field o~ the Invention This invention relates generally to the structure of high-density optical fiber cables employed in optical communicationnetworks. More particularly, the invention relates to th~
configuration of groo~es in the walls of the core of an optical cable having a plurality of tape~shaped optical fiber bundles therein.
2. Descrip ion of the Prior Art one type of optical fiber cable includes one or more cores, each having grooves therein. Tape-shaped optical fiber bundles are inserted into the grooves. A tape is wrapped around each core after the optical ~iber bundles are inserted into the grooves. Then, a sheath is wrapped around all of the taped cores. Dimensions of the grooves have not been previously regarded as important~ Therefore, the width of each groove is typically made slightly larger than the width of each tape-shaped optical fiber bundle. The depth of each groove is made to accommodate the thickness of the number of tape~shaped bundles to be placed in the groove one on top of each other.
It has ~een thought that if the groove dimensions are thus selected to easily accommodate and bundles to ~e inserted ~ therein, that the resulting optical fiber would function w411.
i 25 However, it has been found that performanca is affected by groove dimensions. The optizal fiber bundle must have sufficient roo~ to make moderate bends as it winds around its cor~
~ithout being so free as to un-unifon~ twist the optical fibers of the bundle. If un-unlformal twisting occurs,tr~ssion loss is ~ reased and mechanical strength is decreased. If the groove dimensions are not properly s~lected, the optical ~iber bundles are then subjected to side pressures which cause degraded performance.
Also, the lifetime of the cable may be short.
However, until now, no particular attention has been paid to the dimensions of the tape-shaped bundles and the grooves which accommodate the bundles in trying to prevent th~ deterioration of transmission signals and mechanical strength.
SUMMARY OF THE INVENTION
This invention rela~es to an improvement in the core o~ an optical cable. For an optical ~iber having a grooved core with tape-shaped optical fiber bundles there;n, the groove dimensions should be selected such that WS
1.2~ -- c1.4S
WT
DS
1.3< <1.55 nT
If the dimensions are selected as set forth above, the bundles ~ 25 are prevented from hav;ing an irregular arrangement and tha ! transmission and mechanical strength characteristics are also improved.
, ~Z~5(~6 BRIEF DESCRIPTION OF THE DRAWINGS
These and other advantage of the present invention may be appresiated from studying the following detailed description of the preferred embodiment together with the drawings in which:
FIGURES 1 (a), (b3 and (c) are diagrams outlining the structure of an example of a tape and slot type optical cable according to this invention.
FIGURE 2 is an diagram showing the structure of a part of the optical cable according to the invention.
FIGURE 3 is a graphical representation indicating optical cable characteristics according to groove depth.
FIGURE 4 is a sectional view showing the structure of another example of the tape and slot type optical cable according to the invention.
FIGURE 5 is a sectional view showing the structure of another exampla of the tape and slot type optical cable according to the invention.
DETAILED DESCRIPTION OF THE PREFERRED ~MBODIMENT
In FIGURE 1, tape-shaped optical fiber bundles 10 are disposed in a plurality of cores 12 having grooves 14 cut in the core 12. Core tape 16, wrapped ovar each core 12l keeps bundles 10 disposed in the grooves 14. A central tensile strength member 18 provides support for a plurality of cores 12. Bundle tape 20 holds the plurality of cores 12 in posi~ions around tensile .-. ...
~L29135C~
member 18. A sheath 22 covers bundle tape 20. This arrangement forms an optical cable 24.
The side view in FIGURE l(b) illustrates the grooves 14 cut out of a core 12.
FIGURE l(c) illustrates an enlarged view of tape-shaped optical fibers lG. A plurality of optical fibers 26 are held parallel to each other and in the same plane by optical fiber cover 28.
FIGURE 2 is a diagram showing the structure of each of the grooves 14 of the core 12 and the tape-shaped bundles 10 stacked in the groove 14. Reference characters Ws and Ds designate the width and depth of each groove 14, respectively and WT and T
designate the width and thickness of each tape-shaped bundle 10 respecti.vely. Reference character n designates the number of bundles 10 which are stacked on top of each other within groove 14.
~29~35~
Experiments were performed on optic~l cables having various groove widths and depths. The various values used are listed in Table l.
~ab~~e `~
_ ____ __ No.1¦~o.2¦i~o.3l'~o.4¦1i . J ¦NO ~ ¦ `; O 7 ¦I~ O 8¦`~o. G
Ou~iae di~re~er lG ,m G~oove WlQ-~`'. W5 ~ O ¦ 2. 2 ¦ 2 . 3 ~ 2-2¦ 2-2¦ Z
Groove d)~tn ~c 2.4 12.4 ¦ 2.41 2.4 ¦ 2.4 ¦ 2.C ! 2.2 ¦ 2.6¦ 2.8 . _ _. .
Groove pi~ch 70C
_ ~
Central ten9ile 7/l.0 tr~naed ~teel ~ire~
~trength member .
~. _ . . .. _ The tape-shaped optical fiber bundles used are GI type having a S width (WT) 1.6 mm and a thickness (T~ 0.42 mm and each bundle has five optical fibers. E'our of these bundles were stacked on top of each oth r during the experiments. The tests performed on these cables and the r~sults of these tests are listed in Table 20 ~' .'.
, ~2~85~1~
rab;~ 2.
. . ¦ C?~ ccl ur. ~ ~o.
Ies~ item lest co~citio~ ~ _ _ _ 1 2 3 A 5 6 7 8~ ¦
. . - _ .... ~ _.. _ _ _ _ _ _ ~er~ the tcpe- B~ndi~g dizmeter fiber lines 200 mm~.
disorder~d wheD Bending 180 in opposi~e No No ?;o ~o ':es ~o No ~o Yesi bent ? direc~ions ten times, .
___ __ _ _ _ _ _ _ B~nding diameter 300 ms~. . .
Maxi~um Be~dlng 180 in op~osite incre2se i~ directlons five tl~es .
trans~ission Trz~smission loss monit~r, 02 ~.05 O 0 0 0 ¦ 0 0 O
loss ca~lsed by applied to the first ~ ~ ¦
fivers in ~o.4 toutermost) . tape-shaped optical fiber I .
. . _ line, _ ~ _i _ ¦ M~Yimum ISide pressure 300 kg/50 ~
¦ inc~ease i~ l,flat plate, ¦ 0 0 ¦ ~ ¦ 0 ¦ 0~05l ¦ ¦ ¦
¦ lr5s~byeSide ¦opeical fi~er in ~o 4 ¦
P l(outerT,^ost) ta~e-s~a~ed ~ ~ n ~
o~tical fiber line. . I _ I I I I l i I
.
FI~URE 3 is a diagram showing acceptable bend characteristic data and side-pressure withstanding characteristic data in terms of the data of groove dimensions and optical cable characteristics of Table 20 If the groove width Ws is excessively large, then the degree of freedom of the tape-! shaped bundles 10 in it is so large that the tape-shaped bundles I
!
~ 6 10 may ~ne ~~ ormally twisted~ if, for example, the optical cable i5 b~nt. I~ the groove width Ws is excessively small and the optical cahle is bent, the tape shaped bundles 10 are moved in the direction in which the optical cable i5 bent and are pushed against the groove side and a sideward pressure is caused thus increasing the transmission loss.
If the groove depth D5 is excessively large, then similarly as in the case Q~ groove width Ws, t~e tape-shaped bundle5 10 may become twisted. If the groove depth Ds is excessively small, deformation by an external pressure causes increased transmission losses.
It has been determined that the optical cable characteristic is satisfactory when khe groove dimensions and the tape-shaped bundle dimensions meet the following expressions:
WS
1.2< ~ <1.45 WT
DS
1.3~ <1.55 nT
In FIGURE 3, region I designates a range of groove dimensions in which the optical cable characteristic i~
satisfactory, region II designates a range oP groo~e dimensions in which the tape-shaped bundles may become irregular in arrangement and region III desîgnates a range o~ groove dimensions in which a bend or side pressure applied to the optical cable may result in a transmission loss.
~Z~8~
FIGURE 4 illustrates another embodiment of the invention.
In this embodiment, bundles 10 are placed in grooves 14 of a core 12 as in the embodiment shown in FIGURE l(a). However, each core 12 includes a tensile member 30 which runs through the center of core 12 tensile member 30 performs the same function as tensile member 18 of FIGURE l(a). There~ore, central tensile member 18 in the FIGURE l(a) axrangement i5 unnecessary.
FIGURE 5 is a sectional view showing the structure of another example of the tape and slot type optical cable according to the invention. A single core 12 having a tensile member 30 is protected by a sheath 22. Also shown in FIGURE 5 is another modification in which a stranded copper wire pair 32 is disposed in one of the grooves.
With respect to the optical cables shown in FIGURES 4 and 5, lS if the groove width Ws, the groove depth Ds, the tape-shaped optical fiber line width Ws, the tape-shaped op$ical fiber line thickness T and the number a of tape-shape~ bundles in a groove satisfy the above-described equations, optical cables with satisfactory characteristics will be ~ormed.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiments, it is to be understovd that the invention is not limit~d to the disclosed embodiment but, on the contrary, is intended to cover various modification and equivalent arrangements included within the spirit and scope of the appended claims.
It has ~een thought that if the groove dimensions are thus selected to easily accommodate and bundles to ~e inserted ~ therein, that the resulting optical fiber would function w411.
i 25 However, it has been found that performanca is affected by groove dimensions. The optizal fiber bundle must have sufficient roo~ to make moderate bends as it winds around its cor~
~ithout being so free as to un-unifon~ twist the optical fibers of the bundle. If un-unlformal twisting occurs,tr~ssion loss is ~ reased and mechanical strength is decreased. If the groove dimensions are not properly s~lected, the optical ~iber bundles are then subjected to side pressures which cause degraded performance.
Also, the lifetime of the cable may be short.
However, until now, no particular attention has been paid to the dimensions of the tape-shaped bundles and the grooves which accommodate the bundles in trying to prevent th~ deterioration of transmission signals and mechanical strength.
SUMMARY OF THE INVENTION
This invention rela~es to an improvement in the core o~ an optical cable. For an optical ~iber having a grooved core with tape-shaped optical fiber bundles there;n, the groove dimensions should be selected such that WS
1.2~ -- c1.4S
WT
DS
1.3< <1.55 nT
If the dimensions are selected as set forth above, the bundles ~ 25 are prevented from hav;ing an irregular arrangement and tha ! transmission and mechanical strength characteristics are also improved.
, ~Z~5(~6 BRIEF DESCRIPTION OF THE DRAWINGS
These and other advantage of the present invention may be appresiated from studying the following detailed description of the preferred embodiment together with the drawings in which:
FIGURES 1 (a), (b3 and (c) are diagrams outlining the structure of an example of a tape and slot type optical cable according to this invention.
FIGURE 2 is an diagram showing the structure of a part of the optical cable according to the invention.
FIGURE 3 is a graphical representation indicating optical cable characteristics according to groove depth.
FIGURE 4 is a sectional view showing the structure of another example of the tape and slot type optical cable according to the invention.
FIGURE 5 is a sectional view showing the structure of another exampla of the tape and slot type optical cable according to the invention.
DETAILED DESCRIPTION OF THE PREFERRED ~MBODIMENT
In FIGURE 1, tape-shaped optical fiber bundles 10 are disposed in a plurality of cores 12 having grooves 14 cut in the core 12. Core tape 16, wrapped ovar each core 12l keeps bundles 10 disposed in the grooves 14. A central tensile strength member 18 provides support for a plurality of cores 12. Bundle tape 20 holds the plurality of cores 12 in posi~ions around tensile .-. ...
~L29135C~
member 18. A sheath 22 covers bundle tape 20. This arrangement forms an optical cable 24.
The side view in FIGURE l(b) illustrates the grooves 14 cut out of a core 12.
FIGURE l(c) illustrates an enlarged view of tape-shaped optical fibers lG. A plurality of optical fibers 26 are held parallel to each other and in the same plane by optical fiber cover 28.
FIGURE 2 is a diagram showing the structure of each of the grooves 14 of the core 12 and the tape-shaped bundles 10 stacked in the groove 14. Reference characters Ws and Ds designate the width and depth of each groove 14, respectively and WT and T
designate the width and thickness of each tape-shaped bundle 10 respecti.vely. Reference character n designates the number of bundles 10 which are stacked on top of each other within groove 14.
~29~35~
Experiments were performed on optic~l cables having various groove widths and depths. The various values used are listed in Table l.
~ab~~e `~
_ ____ __ No.1¦~o.2¦i~o.3l'~o.4¦1i . J ¦NO ~ ¦ `; O 7 ¦I~ O 8¦`~o. G
Ou~iae di~re~er lG ,m G~oove WlQ-~`'. W5 ~ O ¦ 2. 2 ¦ 2 . 3 ~ 2-2¦ 2-2¦ Z
Groove d)~tn ~c 2.4 12.4 ¦ 2.41 2.4 ¦ 2.4 ¦ 2.C ! 2.2 ¦ 2.6¦ 2.8 . _ _. .
Groove pi~ch 70C
_ ~
Central ten9ile 7/l.0 tr~naed ~teel ~ire~
~trength member .
~. _ . . .. _ The tape-shaped optical fiber bundles used are GI type having a S width (WT) 1.6 mm and a thickness (T~ 0.42 mm and each bundle has five optical fibers. E'our of these bundles were stacked on top of each oth r during the experiments. The tests performed on these cables and the r~sults of these tests are listed in Table 20 ~' .'.
, ~2~85~1~
rab;~ 2.
. . ¦ C?~ ccl ur. ~ ~o.
Ies~ item lest co~citio~ ~ _ _ _ 1 2 3 A 5 6 7 8~ ¦
. . - _ .... ~ _.. _ _ _ _ _ _ ~er~ the tcpe- B~ndi~g dizmeter fiber lines 200 mm~.
disorder~d wheD Bending 180 in opposi~e No No ?;o ~o ':es ~o No ~o Yesi bent ? direc~ions ten times, .
___ __ _ _ _ _ _ _ B~nding diameter 300 ms~. . .
Maxi~um Be~dlng 180 in op~osite incre2se i~ directlons five tl~es .
trans~ission Trz~smission loss monit~r, 02 ~.05 O 0 0 0 ¦ 0 0 O
loss ca~lsed by applied to the first ~ ~ ¦
fivers in ~o.4 toutermost) . tape-shaped optical fiber I .
. . _ line, _ ~ _i _ ¦ M~Yimum ISide pressure 300 kg/50 ~
¦ inc~ease i~ l,flat plate, ¦ 0 0 ¦ ~ ¦ 0 ¦ 0~05l ¦ ¦ ¦
¦ lr5s~byeSide ¦opeical fi~er in ~o 4 ¦
P l(outerT,^ost) ta~e-s~a~ed ~ ~ n ~
o~tical fiber line. . I _ I I I I l i I
.
FI~URE 3 is a diagram showing acceptable bend characteristic data and side-pressure withstanding characteristic data in terms of the data of groove dimensions and optical cable characteristics of Table 20 If the groove width Ws is excessively large, then the degree of freedom of the tape-! shaped bundles 10 in it is so large that the tape-shaped bundles I
!
~ 6 10 may ~ne ~~ ormally twisted~ if, for example, the optical cable i5 b~nt. I~ the groove width Ws is excessively small and the optical cahle is bent, the tape shaped bundles 10 are moved in the direction in which the optical cable i5 bent and are pushed against the groove side and a sideward pressure is caused thus increasing the transmission loss.
If the groove depth D5 is excessively large, then similarly as in the case Q~ groove width Ws, t~e tape-shaped bundle5 10 may become twisted. If the groove depth Ds is excessively small, deformation by an external pressure causes increased transmission losses.
It has been determined that the optical cable characteristic is satisfactory when khe groove dimensions and the tape-shaped bundle dimensions meet the following expressions:
WS
1.2< ~ <1.45 WT
DS
1.3~ <1.55 nT
In FIGURE 3, region I designates a range of groove dimensions in which the optical cable characteristic i~
satisfactory, region II designates a range oP groo~e dimensions in which the tape-shaped bundles may become irregular in arrangement and region III desîgnates a range o~ groove dimensions in which a bend or side pressure applied to the optical cable may result in a transmission loss.
~Z~8~
FIGURE 4 illustrates another embodiment of the invention.
In this embodiment, bundles 10 are placed in grooves 14 of a core 12 as in the embodiment shown in FIGURE l(a). However, each core 12 includes a tensile member 30 which runs through the center of core 12 tensile member 30 performs the same function as tensile member 18 of FIGURE l(a). There~ore, central tensile member 18 in the FIGURE l(a) axrangement i5 unnecessary.
FIGURE 5 is a sectional view showing the structure of another example of the tape and slot type optical cable according to the invention. A single core 12 having a tensile member 30 is protected by a sheath 22. Also shown in FIGURE 5 is another modification in which a stranded copper wire pair 32 is disposed in one of the grooves.
With respect to the optical cables shown in FIGURES 4 and 5, lS if the groove width Ws, the groove depth Ds, the tape-shaped optical fiber line width Ws, the tape-shaped op$ical fiber line thickness T and the number a of tape-shape~ bundles in a groove satisfy the above-described equations, optical cables with satisfactory characteristics will be ~ormed.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiments, it is to be understovd that the invention is not limit~d to the disclosed embodiment but, on the contrary, is intended to cover various modification and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (6)
1. an optical cable comprising:
a predetermined plurality n of tape-shaped optical fiber bundles having a thickness T and a width WT; and at least one core having at least one groove therein, said groove having a width WS and a depth DS satisfying the equations:
said bundles being disposed in said groove.
a predetermined plurality n of tape-shaped optical fiber bundles having a thickness T and a width WT; and at least one core having at least one groove therein, said groove having a width WS and a depth DS satisfying the equations:
said bundles being disposed in said groove.
2. An optical cable according to claim 1 further including a tape which covers said core.
3. An optical cable according to claim 2 further including an outer sheath.
4. An optical cable according to claim 3 further including a tensile member disposed through the center of said core.
5. An optical cable according to claim 1 wherein said core has at least two grooves therein, said plurality of tape-shaped optical fiber bundles being disposed in one of said grooves, said cable further including a pair of stranded copper wires disposed in said other groove.
6. An optical cable comprising:
a rod shaped tensile member:
a predetermined plurality n of tape-shaped optical fiber bundles, each of said bundles having a thickness T and a width WT;
a plurality of cores, each core having at least one groove therein, said groove having a width WS and a depth DS satisfying the equations:
said bundles being disposed within each of said grooves;
a tape wrapped around each core having said bundles in its grooves; and a sheath which covers all of said cores each having a tape wrapped there around and said tensile member.
a rod shaped tensile member:
a predetermined plurality n of tape-shaped optical fiber bundles, each of said bundles having a thickness T and a width WT;
a plurality of cores, each core having at least one groove therein, said groove having a width WS and a depth DS satisfying the equations:
said bundles being disposed within each of said grooves;
a tape wrapped around each core having said bundles in its grooves; and a sheath which covers all of said cores each having a tape wrapped there around and said tensile member.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP42010/87 | 1987-02-25 | ||
| JP62042010A JPH01163710A (en) | 1987-02-25 | 1987-02-25 | Optical cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1298506C true CA1298506C (en) | 1992-04-07 |
Family
ID=12624212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000559247A Expired - Fee Related CA1298506C (en) | 1987-02-25 | 1988-02-18 | Optical cable |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4820014A (en) |
| EP (1) | EP0280279A3 (en) |
| JP (1) | JPH01163710A (en) |
| CN (1) | CN88101042A (en) |
| CA (1) | CA1298506C (en) |
Families Citing this family (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3811126A1 (en) * | 1988-03-31 | 1989-10-12 | Siemens Ag | OPTICAL CABLE WITH SEVERAL STRAP ELEMENTS |
| GB8908446D0 (en) * | 1989-04-14 | 1989-06-01 | Bicc Plc | Optical cable |
| IT1246985B (en) * | 1990-11-13 | 1994-12-12 | Pirelli Cavi Spa | OPTICAL FIBER ELEMENT INCLUDING A COATING LAYER OF CROSS-LINKED POLYACRYLATE FOR UV RADIATION AND A H2 ABSORBENT BUFFER |
| IT1244809B (en) * | 1990-11-29 | 1994-09-05 | Pirelli Cavi Spa | OPTICAL FIBER ELEMENT INCLUDING A HOUSING FOR OPTICAL FIBERS, MADE OF POLYOLEFINIC MATERIAL, AND A H2-ABSORBENT BUFFER. |
| US5177809A (en) * | 1990-12-19 | 1993-01-05 | Siemens Aktiengesellschaft | Optical cable having a plurality of light waveguides |
| US5210813A (en) * | 1991-01-17 | 1993-05-11 | Siemens Aktiengesellschaft | Optical cable and method for manufacturing the optical cable |
| US5193134A (en) * | 1991-03-08 | 1993-03-09 | Pirelli Cavi S.P.A. | Grooved-core cable for use with ribbon optical fibres and process to make the same |
| JP2680943B2 (en) * | 1991-06-03 | 1997-11-19 | 住友電気工業株式会社 | Optical cable |
| US5222177A (en) * | 1992-03-31 | 1993-06-22 | At&T Bell Laboratories | Underwater optical fiber cable having optical fiber coupled to grooved core member |
| US5224190A (en) * | 1992-03-31 | 1993-06-29 | At&T Bell Laboratories | Underwater optical fiber cable having optical fiber coupled to grooved metallic core member |
| US5333228A (en) * | 1993-05-21 | 1994-07-26 | Super Vision International Inc. | Lateral illumination fiber optic cable device and method of manufacture |
| US5838860A (en) * | 1993-05-21 | 1998-11-17 | Super Vision International, Inc. | Fiber optic light source apparatus and method |
| US5384880A (en) * | 1993-12-03 | 1995-01-24 | Alcatel Na Cable Systems, Inc. | Dielectric ribbon optical fiber cable |
| FR2722029B1 (en) * | 1994-07-01 | 1996-08-02 | Alcatel Cable | CABLE CONTAINING AT LEAST ONE ELONGATE ELEMENT |
| MY113721A (en) * | 1994-07-06 | 2002-05-31 | Furukawa Electric Co Ltd | Optical fiber cable |
| JPH08234064A (en) * | 1995-02-27 | 1996-09-13 | Sumitomo Electric Ind Ltd | Optical fiber cable |
| US5517591A (en) * | 1995-06-07 | 1996-05-14 | Siecor Corporation | Compact slotted core ribbon cable |
| US5771321A (en) * | 1996-01-04 | 1998-06-23 | Massachusetts Institute Of Technology | Micromechanical optical switch and flat panel display |
| US6178278B1 (en) | 1997-11-13 | 2001-01-23 | Alcatel | Indoor/outdoor dry optical fiber cable |
| US6169834B1 (en) | 1998-05-13 | 2001-01-02 | Alcatel | Slotted composite cable having a cable housing with a tubular opening for copper pairs and a slot for an optical fiber |
| US6253012B1 (en) | 1998-11-12 | 2001-06-26 | Alcatel | Cycled fiber lock for cross-functional totally dry optical fiber loose tube cable |
| US6749446B2 (en) | 2001-10-10 | 2004-06-15 | Alcatel | Optical fiber cable with cushion members protecting optical fiber ribbon stack |
| CN104007524A (en) * | 2014-04-23 | 2014-08-27 | 晶锋集团股份有限公司 | Optical fiber bundle protection wire |
| CN104007525A (en) * | 2014-04-23 | 2014-08-27 | 晶锋集团股份有限公司 | Optical fiber cable |
| CN104007523A (en) * | 2014-04-23 | 2014-08-27 | 晶锋集团股份有限公司 | Reinforced optical fiber cable |
| WO2017022531A1 (en) * | 2015-07-31 | 2017-02-09 | 住友電気工業株式会社 | Optical fiber cable |
| CN110770621A (en) * | 2017-06-14 | 2020-02-07 | 住友电气工业株式会社 | Groove-shaped optical cable |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1448793A (en) * | 1974-05-31 | 1976-09-08 | Post Office | Optical cables |
| DE2449439C3 (en) * | 1974-10-15 | 1984-08-23 | Siemens AG, 1000 Berlin und 8000 München | Communication cables with light guides or light guide bundles as transmission elements |
| US4110001A (en) * | 1977-01-05 | 1978-08-29 | General Cable Corporation | Optical fiber cable construction |
| FR2460492A1 (en) * | 1979-06-28 | 1981-01-23 | Cables De Lyon Geoffroy Delore | FIBER OPTIC UNDERWATER CABLE |
| FR2488698A1 (en) * | 1980-08-13 | 1982-02-19 | Lignes Telegraph Telephon | Assembly process for optical fibre cables - uses carrier with groove of width greater than dia. of cable and having depth greater than or equal to dia. |
| US4401366A (en) * | 1981-04-30 | 1983-08-30 | Northern Telecom Limited | Powder filled fiber optic cable |
| FR2511161B1 (en) * | 1981-08-05 | 1986-04-04 | Foptica | OPTICAL CABLE FOR SUPPORTING HIGH PRESSURES |
| JPS5886501A (en) * | 1981-11-18 | 1983-05-24 | Nippon Telegr & Teleph Corp <Ntt> | Optical cable |
| GB2123164B (en) * | 1982-06-11 | 1986-01-15 | Standard Telephones Cables Ltd | Optical fibre cables |
| JPS60145410U (en) * | 1984-03-06 | 1985-09-27 | 住友電気工業株式会社 | waterproof fiber optic cable |
| JPS6172212A (en) * | 1984-09-17 | 1986-04-14 | Fujikura Ltd | Optical fiber cable and its production |
| US4744631A (en) * | 1985-01-31 | 1988-05-17 | American Telephone And Telegraph Company, At&T Bell Laboratories | Single mode optical fiber ribbon cable |
| JPH06289915A (en) * | 1993-03-31 | 1994-10-18 | Toyoda Mach Works Ltd | Digital servo controller |
-
1987
- 1987-02-25 JP JP62042010A patent/JPH01163710A/en active Pending
-
1988
- 1988-02-18 CA CA000559247A patent/CA1298506C/en not_active Expired - Fee Related
- 1988-02-24 EP EP19880102752 patent/EP0280279A3/en not_active Withdrawn
- 1988-02-24 CN CN198888101042A patent/CN88101042A/en active Pending
- 1988-02-25 US US07/160,241 patent/US4820014A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0280279A3 (en) | 1990-12-12 |
| CN88101042A (en) | 1988-09-07 |
| AU597151B2 (en) | 1990-05-24 |
| JPH01163710A (en) | 1989-06-28 |
| US4820014A (en) | 1989-04-11 |
| EP0280279A2 (en) | 1988-08-31 |
| AU1218588A (en) | 1988-09-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |