CA1039988A - Optical fibre joining - Google Patents
Optical fibre joiningInfo
- Publication number
- CA1039988A CA1039988A CA253,001A CA253001A CA1039988A CA 1039988 A CA1039988 A CA 1039988A CA 253001 A CA253001 A CA 253001A CA 1039988 A CA1039988 A CA 1039988A
- Authority
- CA
- Canada
- Prior art keywords
- fibers
- sleeve
- bore
- set forth
- optical
- 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
Links
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
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3801—Permanent connections, i.e. wherein fibres are kept aligned by mechanical means
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
- C03C27/06—Joining glass to glass by processes other than fusing
-
- 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
- G02B6/24—Coupling light guides
- G02B6/25—Preparing the ends of light guides for coupling, e.g. cutting
-
- 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
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/381—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
- G02B6/3818—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres of a low-reflection-loss type
- G02B6/382—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres of a low-reflection-loss type with index-matching medium between light guides
-
- 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
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3873—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls
- G02B6/3874—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls using tubes, sleeves to align ferrules
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Coupling Of Light Guides (AREA)
- Cable Accessories (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
Optical fibers are butt joined in a cast Wood's metal sleeve. The bore in the sleeve is formed by casting around a stainless steel wire. The resulting bore tolerance provides good alignment of bare fibers. The fibers are secured in the sleeve by crimping the sleeve or by metting its ends.
The assembly is protected with a length of heat shrinkable tubing.
Optical fibers are butt joined in a cast Wood's metal sleeve. The bore in the sleeve is formed by casting around a stainless steel wire. The resulting bore tolerance provides good alignment of bare fibers. The fibers are secured in the sleeve by crimping the sleeve or by metting its ends.
The assembly is protected with a length of heat shrinkable tubing.
Description
... .
J. JJees/A. R. Gilbert/
~03~98t3 M. K. R. Vyas 17-4-4 Rev.
BACKGROUND OF THE INVENTION
The present inventions relates to a method of malcing a butt jolnt between optical fibers and to the joint per se.
The need for forming butt Joints or splices for single optical fibers in the field of fiber optics communications is well known. Reference is made to U. S. Patents Nos. 3,768,146 and 3,810,802 for examples of slngle fiber joints. The purpose of the present invention ls to provlde a ~oint whlch produces very low light transmission losses and a method of making the ~oint.
SUMMA~Y OF THE INVENTION
According to the one aspect of the present invention, there is provided an optical fiber jolnt including a pair of optical fibers whose ends are butted together within the straight parallel-sided, uninterrupted bore of a metal sleeve.
The fibers have a sliding flt in the bore so that alignment of the butted ends is provided by virtue of the fit. The fibers are secured withln the sleeve in theirbutting relationshlp.
A preferred way of making a suitable metal sleeve having a bore of the required tolerance ls by casting, using a relatively low melting point alloy cast around a wire held under tension. The optical coupling between the butted ends may be enhanced by the use of a liquid, commonly referred to as an index match-
J. JJees/A. R. Gilbert/
~03~98t3 M. K. R. Vyas 17-4-4 Rev.
BACKGROUND OF THE INVENTION
The present inventions relates to a method of malcing a butt jolnt between optical fibers and to the joint per se.
The need for forming butt Joints or splices for single optical fibers in the field of fiber optics communications is well known. Reference is made to U. S. Patents Nos. 3,768,146 and 3,810,802 for examples of slngle fiber joints. The purpose of the present invention ls to provlde a ~oint whlch produces very low light transmission losses and a method of making the ~oint.
SUMMA~Y OF THE INVENTION
According to the one aspect of the present invention, there is provided an optical fiber jolnt including a pair of optical fibers whose ends are butted together within the straight parallel-sided, uninterrupted bore of a metal sleeve.
The fibers have a sliding flt in the bore so that alignment of the butted ends is provided by virtue of the fit. The fibers are secured withln the sleeve in theirbutting relationshlp.
A preferred way of making a suitable metal sleeve having a bore of the required tolerance ls by casting, using a relatively low melting point alloy cast around a wire held under tension. The optical coupling between the butted ends may be enhanced by the use of a liquid, commonly referred to as an index match-
2~) ing liquid. In fact, the liquid does not have to have the same refractive index as the fibers, since any refractive index greater than that of air will reduce, to some extent, the reflection losses at the interfaces at the ends of the Eibers.
The fibers may be secured within the sleeve by any of a variety of methods lnclu-ding by lightly crimping the sleeve in regions removed from the fiber ends, by 2-5 applying a fillet of adheslve around the points of emergence of the fibers rom ~' ~v~
, ,: .
, -- J. Lees/A. ~. Gilbert/
M.K~R. Vyas l7-a-4 Rev.
1~3~
the sleeve, and by shrinking the ends of a length of heat shrinkable plastic tubing extending around the sleeve and the adjoining regions of the fibers. Preferably, the sleeve ~`
is made of an alloy that has a low enough melting point for the joint to be oapable of being dismantled without damage to the fibers by melting the sleeve. In-this case, a further method of securing the fibers within the sleeve is to fuse the ends of the sleeves onto the fibers. ~ `
- ~ .
suitable alloy for typical glass fibers is Wood's metal, -10 which melts in the`range 70-72 C. ~ -BRIEF DESCRIPTION OF THE DR~WINGS `' Fig. 1 is a sectional view of a mold used for maXing - ~
the sleeve used in the method of forming the joint accord- ;~
ing to the invention;
Fig. 2 is a perspective view of the components of the joint before assembly; and ``~
Fig. 3 is a perspective view of a jig for holding `
the assembly in alignment for crimping.
DESCRIPTION OF THE PREFERRED EMBODIMEN~S .
,. ,:,, -Referring to Fig. 1, there is illustrated a demount-able mold for casting a metal joining or splicing sleeve, approximately 10 mm long, 1.5 mm in external diameter with ~
a concentric cylindrical longitudinal uninterrupted bore -80 ~m in diameter. The term "uninterrupted bore" means ...................................................................... .... : i . ~:
25 that the wall of the bore is continuous and is not inter- ~
tupted by a slot. The mold comprises a barrel portion 10, a bottom plug 11, a top cap 12, and a wire 13. The~ -wire may be made of stainless steel and the remaining ~;~
parts of polytetrafluoroethylene. The wire 13 is : . ,.
.:.. :. : . ~
The fibers may be secured within the sleeve by any of a variety of methods lnclu-ding by lightly crimping the sleeve in regions removed from the fiber ends, by 2-5 applying a fillet of adheslve around the points of emergence of the fibers rom ~' ~v~
, ,: .
, -- J. Lees/A. ~. Gilbert/
M.K~R. Vyas l7-a-4 Rev.
1~3~
the sleeve, and by shrinking the ends of a length of heat shrinkable plastic tubing extending around the sleeve and the adjoining regions of the fibers. Preferably, the sleeve ~`
is made of an alloy that has a low enough melting point for the joint to be oapable of being dismantled without damage to the fibers by melting the sleeve. In-this case, a further method of securing the fibers within the sleeve is to fuse the ends of the sleeves onto the fibers. ~ `
- ~ .
suitable alloy for typical glass fibers is Wood's metal, -10 which melts in the`range 70-72 C. ~ -BRIEF DESCRIPTION OF THE DR~WINGS `' Fig. 1 is a sectional view of a mold used for maXing - ~
the sleeve used in the method of forming the joint accord- ;~
ing to the invention;
Fig. 2 is a perspective view of the components of the joint before assembly; and ``~
Fig. 3 is a perspective view of a jig for holding `
the assembly in alignment for crimping.
DESCRIPTION OF THE PREFERRED EMBODIMEN~S .
,. ,:,, -Referring to Fig. 1, there is illustrated a demount-able mold for casting a metal joining or splicing sleeve, approximately 10 mm long, 1.5 mm in external diameter with ~
a concentric cylindrical longitudinal uninterrupted bore -80 ~m in diameter. The term "uninterrupted bore" means ...................................................................... .... : i . ~:
25 that the wall of the bore is continuous and is not inter- ~
tupted by a slot. The mold comprises a barrel portion 10, a bottom plug 11, a top cap 12, and a wire 13. The~ -wire may be made of stainless steel and the remaining ~;~
parts of polytetrafluoroethylene. The wire 13 is : . ,.
.:.. :. : . ~
-3- ; ~
: ',! ' , . " . ' .
J. Lees/A. R. Gllbert/
31.~3~9~3~3 M. K. R. Vyas 1;'~4-4 Rev.
80 ~Im in diameter and extends through 80 ~Im axial holes in the plug and cap. The plug 11 has a cylindrical splgot 14 which fits ln the bore of the barrel 1û while the cap 12 has a llp 15 which fits over the top end of the barrel. The bore diameter of the barrel is 1.55 mm. The wire is tensioned with a weight 16 attached to lts bottom end, and the assembly immersed in a beaker 17 of hot water 18, where lt hangs freely suspended on the wire.
The càp Is cllpped, or otherwise held, at a short distance above the barrel.
A hypodermlc syrlnye (not shown) containing pieces of Wood's metal is immersed in the heated water. When the Wood's metal melts, it Is dispensed from the syringe into the contalner formed by the barrel and bottom plug, where it displaces the water. When the mold is full of molten metal 19, the cap is released and pushed down over the top of the barrel, thereby holding the wire on axis through the mold. At thls stage the mold, still suspended on its wire, is removed from the hot water and allowed to cool. When the metal is cool, the wire i9 cut on each side of the mold, the cap and plug are pulled off the wire, and the cast sleeve 19 is pushed out of the barrel and the wire is pulled out of the sleeve. 1~ the cutting of the wire does not result in a clean brea3c,but instead tends to produce a splaying of the end, it will be necessary to remove this splaying from one end so that it does not deform the sleeve bore 19aas It passes through it on removal of the wire.
The sleeve r with its 80 um~bore is designed for joining plastic coated glàss optical fihers, which when stripped of their plastlc coatlng, have a dia-meter of 72-75 llm. The diameter of the coated fibers is typically about 1 mm, A length of the plastic coating is strlpped from the ends of the two such flbers21 and 22 to expose regions 23 and 24 of bare fiber, as seen in Fig. 2. The
: ',! ' , . " . ' .
J. Lees/A. R. Gllbert/
31.~3~9~3~3 M. K. R. Vyas 1;'~4-4 Rev.
80 ~Im in diameter and extends through 80 ~Im axial holes in the plug and cap. The plug 11 has a cylindrical splgot 14 which fits ln the bore of the barrel 1û while the cap 12 has a llp 15 which fits over the top end of the barrel. The bore diameter of the barrel is 1.55 mm. The wire is tensioned with a weight 16 attached to lts bottom end, and the assembly immersed in a beaker 17 of hot water 18, where lt hangs freely suspended on the wire.
The càp Is cllpped, or otherwise held, at a short distance above the barrel.
A hypodermlc syrlnye (not shown) containing pieces of Wood's metal is immersed in the heated water. When the Wood's metal melts, it Is dispensed from the syringe into the contalner formed by the barrel and bottom plug, where it displaces the water. When the mold is full of molten metal 19, the cap is released and pushed down over the top of the barrel, thereby holding the wire on axis through the mold. At thls stage the mold, still suspended on its wire, is removed from the hot water and allowed to cool. When the metal is cool, the wire i9 cut on each side of the mold, the cap and plug are pulled off the wire, and the cast sleeve 19 is pushed out of the barrel and the wire is pulled out of the sleeve. 1~ the cutting of the wire does not result in a clean brea3c,but instead tends to produce a splaying of the end, it will be necessary to remove this splaying from one end so that it does not deform the sleeve bore 19aas It passes through it on removal of the wire.
The sleeve r with its 80 um~bore is designed for joining plastic coated glàss optical fihers, which when stripped of their plastlc coatlng, have a dia-meter of 72-75 llm. The diameter of the coated fibers is typically about 1 mm, A length of the plastic coating is strlpped from the ends of the two such flbers21 and 22 to expose regions 23 and 24 of bare fiber, as seen in Fig. 2. The
-4 -.,. . . . . , . . ~ :
J, ~ ees~h, R. Gllbe t/
M. K. R. Vyas 17-4-4 Rev.
~Q;~
manner of stripping wlll depend upon the particular plastic material used to coat the fibers. With polypropylene coated fibers, it is preferred to melt the coating off rather than to dissolve it off. .A hot wire, soldering iron, or preierably a hot air gun may be used fDr this purpose.
The two bared regions 23 and 24 of silica fiber are prepared for buttin~
together by providing them with flat end faces 25 and 26 by any suitable tech-nique. One way is to score lightly, the bared fiber surface and then subject the flber to tensile stress until it breal;s. Another way involves placing the bared fiber on a sharp edge, such as that of a razor blade, applying the spark of a tesla coil to the fiber at the sharp edge, and then breaklng the fiber at r,, this point by bending it or applying tension. These flat end faces 25 and 26 are prepared at positions having in each case a length of bare fiber 23 and 24 that i~s just longer than half the length of the case Wood's metal sleeve 19 so that when the fibe~s are inserted into the sleeve bore 19a, their ends will butttogether leavillg only a short distance of bare fiber at either end. First, how-ever, a length of heat shrinkable plastic tubing 27 i9 slipped over the end of one of the fibers. Then the two bared fibers are inserted by hand into the sleeve, until their ends bu'-t together somewhere near the midpoint. It is pre-ferred to insert a drop of liquid into the sleeve before the fibers to provide aglass-liquid interface instead of a ~lass-air one at the fiber ends in order to -reduce reflection losses. A liquid that has a lo~,v volatility, and toxicity, and that will not attack the plastic coatings, is desired for this purpose. One example of a suitable liquid is a silicone oil having a viscosity of about l0û
centipoise. With care, the instant of the two fiber ends butting together can be felt. The assembly ls then placed between the Jaws of a two part ~ig 30 J, Lees/A, R. Gilbert/
M. K. R. Vyas 17-4-4 Rev.
1C~3~
depicted in Fig. 3. Thls jlg has a groovèd center section 31 for gripping the central portion of the sleeve 19, and grooved end sections 32 for gripping the plastlc coating of the fibers. The two parts of the jlg are clamped together to hold the assembly in position while the coupling eficiency of the joint is tested by observing how much of the light launched into one of the fibers emerges from the far end of the other~ If this is satis-factory, the fibers are then secured within the sieeve. One method of securing the fibers is to crimp the sleeve onto the bare fibers. Care has to be taken with such crimping in order not to damage the fibsrs. A suitable tool for crimping is a pair of parallel ~aw pllers havlng a ~aw width of aboul:
1 mm, and having the travel limited by a suitable spacer of 1.3 mm placec~
between the ~aw~ to act as a stop, ~s an alternative to crimping, the ends of the sleeve may be heated with a hot air gun so that they melt and collapse onto the fibers. Yet another lS possible method of securing the fibers is to apply fillets of a quick setting cement such as cyanoacrylate adhesive around the bare fibers where they emerge from the ends of the sleeve Finally the length 27 of heat shrinkable plastic tubing, which was slipped over one of the fibers before their insertion into the sleeve, ls slipped back down the fiber and positioned over the sleeve with its two ends extending a short distance over the plastic coatings of the two Eibers. A hot air gun ls then used to collapse the tubing. If the temperature required to shrink the tubing is very close to the melting point of the underlying metal sleeve, the heating 1s confined to shrinking only the end ~ortlons to secure it to the plastic coatlng on each fiber.
J. Lees/A. R. Gilbert/
M, K . R . Vya s 17 -4 -4 Rev .
~9~
The dirnensions of the sleeve 19 and optical fibers disclosed herein are given by way of example only, and not by limitation. Further, flbers other than plastic coated glass flbers could be used in the ~olnt of the present invention.
:.
~`,' . '.',:
, , ' , . , .
',' , '' ' ~ ' .
. .
,~
J, ~ ees~h, R. Gllbe t/
M. K. R. Vyas 17-4-4 Rev.
~Q;~
manner of stripping wlll depend upon the particular plastic material used to coat the fibers. With polypropylene coated fibers, it is preferred to melt the coating off rather than to dissolve it off. .A hot wire, soldering iron, or preierably a hot air gun may be used fDr this purpose.
The two bared regions 23 and 24 of silica fiber are prepared for buttin~
together by providing them with flat end faces 25 and 26 by any suitable tech-nique. One way is to score lightly, the bared fiber surface and then subject the flber to tensile stress until it breal;s. Another way involves placing the bared fiber on a sharp edge, such as that of a razor blade, applying the spark of a tesla coil to the fiber at the sharp edge, and then breaklng the fiber at r,, this point by bending it or applying tension. These flat end faces 25 and 26 are prepared at positions having in each case a length of bare fiber 23 and 24 that i~s just longer than half the length of the case Wood's metal sleeve 19 so that when the fibe~s are inserted into the sleeve bore 19a, their ends will butttogether leavillg only a short distance of bare fiber at either end. First, how-ever, a length of heat shrinkable plastic tubing 27 i9 slipped over the end of one of the fibers. Then the two bared fibers are inserted by hand into the sleeve, until their ends bu'-t together somewhere near the midpoint. It is pre-ferred to insert a drop of liquid into the sleeve before the fibers to provide aglass-liquid interface instead of a ~lass-air one at the fiber ends in order to -reduce reflection losses. A liquid that has a lo~,v volatility, and toxicity, and that will not attack the plastic coatings, is desired for this purpose. One example of a suitable liquid is a silicone oil having a viscosity of about l0û
centipoise. With care, the instant of the two fiber ends butting together can be felt. The assembly ls then placed between the Jaws of a two part ~ig 30 J, Lees/A, R. Gilbert/
M. K. R. Vyas 17-4-4 Rev.
1C~3~
depicted in Fig. 3. Thls jlg has a groovèd center section 31 for gripping the central portion of the sleeve 19, and grooved end sections 32 for gripping the plastlc coating of the fibers. The two parts of the jlg are clamped together to hold the assembly in position while the coupling eficiency of the joint is tested by observing how much of the light launched into one of the fibers emerges from the far end of the other~ If this is satis-factory, the fibers are then secured within the sieeve. One method of securing the fibers is to crimp the sleeve onto the bare fibers. Care has to be taken with such crimping in order not to damage the fibsrs. A suitable tool for crimping is a pair of parallel ~aw pllers havlng a ~aw width of aboul:
1 mm, and having the travel limited by a suitable spacer of 1.3 mm placec~
between the ~aw~ to act as a stop, ~s an alternative to crimping, the ends of the sleeve may be heated with a hot air gun so that they melt and collapse onto the fibers. Yet another lS possible method of securing the fibers is to apply fillets of a quick setting cement such as cyanoacrylate adhesive around the bare fibers where they emerge from the ends of the sleeve Finally the length 27 of heat shrinkable plastic tubing, which was slipped over one of the fibers before their insertion into the sleeve, ls slipped back down the fiber and positioned over the sleeve with its two ends extending a short distance over the plastic coatings of the two Eibers. A hot air gun ls then used to collapse the tubing. If the temperature required to shrink the tubing is very close to the melting point of the underlying metal sleeve, the heating 1s confined to shrinking only the end ~ortlons to secure it to the plastic coatlng on each fiber.
J. Lees/A. R. Gilbert/
M, K . R . Vya s 17 -4 -4 Rev .
~9~
The dirnensions of the sleeve 19 and optical fibers disclosed herein are given by way of example only, and not by limitation. Further, flbers other than plastic coated glass flbers could be used in the ~olnt of the present invention.
:.
~`,' . '.',:
, , ' , . , .
',' , '' ' ~ ' .
. .
,~
Claims (7)
1. An optical fiber joint comprising:
a cast sleeve of Wood's metal having a straight, uninterrupted bore therein;
a pair of optical fibers having ends butted together within said bore;
said bore being cylindrical in the region of abutment of said fibers therein; and said fibers having a close sliding fit in said bore so that said fiber ends are held in alignment with each other by the cylindrical wall of said bore.
a cast sleeve of Wood's metal having a straight, uninterrupted bore therein;
a pair of optical fibers having ends butted together within said bore;
said bore being cylindrical in the region of abutment of said fibers therein; and said fibers having a close sliding fit in said bore so that said fiber ends are held in alignment with each other by the cylindrical wall of said bore.
2. An optical fiber joint as set forth in claim 1 wherein:
said sleeve is crimped to said fibers in regions spaced from their butted ends.
said sleeve is crimped to said fibers in regions spaced from their butted ends.
3. An optical fiber joint as set forth in claim 1 wherein:
said fibers emerge from said sleeve through a fillet of adhesive.
said fibers emerge from said sleeve through a fillet of adhesive.
4. A method of providing a butt joint between a pair of optical fibers comprising the steps of:
forming a metal sleeve having a straight cylin-drical bore therein by casting Wood's metal around a bare wire to precisely define said bore;
withdrawing said wire from said sleeve;
inserting a pair of optical fibers into the opposite ends of said bore until the fiber ends butt together within the the sleeve;
providing a close sliding fit between the fibers end bore so that alignment of the butted ends of the fibers is provided by virtue of the fit; and securing said fibers within said sleeve in their butting relationship.
forming a metal sleeve having a straight cylin-drical bore therein by casting Wood's metal around a bare wire to precisely define said bore;
withdrawing said wire from said sleeve;
inserting a pair of optical fibers into the opposite ends of said bore until the fiber ends butt together within the the sleeve;
providing a close sliding fit between the fibers end bore so that alignment of the butted ends of the fibers is provided by virtue of the fit; and securing said fibers within said sleeve in their butting relationship.
5. A method as set forth in claim 4 wherein:
after the fibers have been inserted into said sleeve, the fibers are secured within the sleeve by heating the ends of the sleeve to collapse the same onto the fibers.
after the fibers have been inserted into said sleeve, the fibers are secured within the sleeve by heating the ends of the sleeve to collapse the same onto the fibers.
6. A method as set forth in claim 4 wherein:
after the fibers have been inserted into said sleeve, the sleeve is crimped to the fibers in regions spaced from their butted ends.
after the fibers have been inserted into said sleeve, the sleeve is crimped to the fibers in regions spaced from their butted ends.
7. A method as set forth in claim 4 wherein:
a fillet of adhesive is applied to the regions where the two fibers emerge from said sleeve.
a fillet of adhesive is applied to the regions where the two fibers emerge from said sleeve.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2319975A GB1448975A (en) | 1975-05-27 | 1975-05-27 | Joining optical fibres |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1039988A true CA1039988A (en) | 1978-10-10 |
Family
ID=10191764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA253,001A Expired CA1039988A (en) | 1975-05-27 | 1976-05-20 | Optical fibre joining |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS51145331A (en) |
| AU (1) | AU502513B2 (en) |
| CA (1) | CA1039988A (en) |
| CH (1) | CH607063A5 (en) |
| DE (1) | DE2623295A1 (en) |
| FR (1) | FR2312791A1 (en) |
| GB (1) | GB1448975A (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2534756C2 (en) | 1975-08-04 | 1983-12-29 | Siemens AG, 1000 Berlin und 8000 München | Heat shrinkable connector for two single fiber optic cables |
| GB1521780A (en) * | 1976-07-27 | 1978-08-16 | Standard Telephones Cables Ltd | Coupling optical fibres |
| BR7706785A (en) * | 1976-10-14 | 1978-08-22 | Int Standard Electric Corp | OPTICAL FIBER CONNECTOR |
| JPS5921530B2 (en) * | 1977-02-11 | 1984-05-21 | 住友電気工業株式会社 | Plastic clad type, optical fiber connection method |
| US4198119A (en) * | 1978-09-13 | 1980-04-15 | International Business Machines Corporation | Connector for optical cable |
| US4290668A (en) * | 1978-11-29 | 1981-09-22 | Raychem Corporation | Fiber optic waveguide termination and method of forming same |
| US4312571A (en) * | 1979-11-01 | 1982-01-26 | Raychem Corporation | Method for bonding to polymeric clad optical waveguides |
| US4257674A (en) * | 1979-04-23 | 1981-03-24 | Gte Products Corporation | Elastomeric fiber optic splice |
| DE3148954A1 (en) * | 1981-12-10 | 1984-05-03 | Allied Corp., Morris Township, N.J. | CONNECTOR FOR A LIGHTWAVE GUIDE |
| FR2598819B1 (en) * | 1986-05-14 | 1988-09-09 | Univ Limoges | CONNECTOR FOR OPTICAL FIBERS. |
| FR2607597B2 (en) * | 1986-05-14 | 1989-03-10 | Univ Limoges | CONNECTOR FOR OPTICAL FIBERS |
| JP3326087B2 (en) * | 1996-12-26 | 2002-09-17 | 明久 井上 | Ferrule for optical fiber connector and method of manufacturing the same |
| JP3400296B2 (en) | 1997-05-12 | 2003-04-28 | ワイケイケイ株式会社 | Sleeve for optical connector ferrule and method of manufacturing the same |
| JP2000314830A (en) | 1999-05-06 | 2000-11-14 | Ykk Corp | V-grooved substrate for aligning multi core optical connector and multi core optical fiber, and manufacture thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4869538A (en) * | 1971-12-20 | 1973-09-21 | ||
| US3810802A (en) * | 1972-03-31 | 1974-05-14 | Bell Telephone Labor Inc | Optical fiber splicing device and technique |
| JPS5611923B2 (en) * | 1972-10-23 | 1981-03-18 | ||
| AT325326B (en) * | 1972-07-10 | 1975-10-10 | Siemens Ag | CONNECTING PLUG FOR OPTICAL FIBERS AND METHOD FOR ESTABLISHING FIXED CONNECTIONS USING A CONNECTING PLUG |
| GB1449787A (en) * | 1975-05-15 | 1976-09-15 | Standard Telephones Cables L D | Glass optical fibre joints |
-
1975
- 1975-05-27 GB GB2319975A patent/GB1448975A/en not_active Expired
-
1976
- 1976-05-20 CA CA253,001A patent/CA1039988A/en not_active Expired
- 1976-05-25 AU AU14269/76A patent/AU502513B2/en not_active Expired
- 1976-05-25 FR FR7615752A patent/FR2312791A1/en active Granted
- 1976-05-25 DE DE19762623295 patent/DE2623295A1/en not_active Withdrawn
- 1976-05-26 JP JP6020376A patent/JPS51145331A/en active Pending
- 1976-05-26 CH CH662376A patent/CH607063A5/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| FR2312791B1 (en) | 1982-04-02 |
| DE2623295A1 (en) | 1976-12-09 |
| CH607063A5 (en) | 1978-11-30 |
| GB1448975A (en) | 1976-09-08 |
| JPS51145331A (en) | 1976-12-14 |
| FR2312791A1 (en) | 1976-12-24 |
| AU502513B2 (en) | 1979-07-26 |
| AU1426976A (en) | 1977-12-01 |
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