GB2052790A - Forming optical fibre terminations - Google Patents
Forming optical fibre terminations Download PDFInfo
- Publication number
- GB2052790A GB2052790A GB8019115A GB8019115A GB2052790A GB 2052790 A GB2052790 A GB 2052790A GB 8019115 A GB8019115 A GB 8019115A GB 8019115 A GB8019115 A GB 8019115A GB 2052790 A GB2052790 A GB 2052790A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ferrule
- fibre
- clamp
- tip
- blade
- 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.)
- Granted
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
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
- G02B6/3855—Details of mounting fibres in ferrules; Assembly methods; Manufacture characterised by the method of anchoring or fixing the fibre within the ferrule
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Abstract
In forming a ferrule termination on an optical fibre, the end preparation of the fibre is carried out after insertion of the fibre through the ferrule 34, by severing the fibre at its point of emergence from the ferrule tip. This is achieved by means of a fibre severing device which includes means for locating and retaining the ferrule in a predetermined position on a support, a scoring blade carrier arm 18 pivotally mounted in such a manner that lateral movement of the arm, during its forward travel for scoring the fibre, is prevented, a clamp 31,32 for holding the free end of the fibre, and means 13 for enabling the clamp to be urged, under the application of a load, away from the ferrule support, for effecting tensioning of the fibre to cause it to break at the scored point. The movements of the blade arm are suitably effected by pivoting on conical bearings. <IMAGE>
Description
SPECIFICATION
Forming optical fibre terminations
This invention relates to a method of forming on a vitreous optical fibre a termination of the type in which an end portion of the fibre is
mounted within, so as to extend substantially along the longitudinal axis of, a ferrule, with the end face of the fibre located in an aperture at the tip of the ferrule. The invention also relates to apparatus for performing some of the steps of the method described.
The term "vitreous optical fibre", as used herein, is to be understood to mean either an optical fibre wholly composed of glass or of vitreous silica containing one or more dopants for giving a required refractive index profile across the cross-section of the fibre, or an optical fibre consisting of a core composed of such vitreous material and a cladding layer of plastic material. In either case the fibre may be covered with a protective coating of synthetic resin.
Optical fibre terminations of the type referred to are employed for forming end-to-end optical couplings between pairs of optical fibres, particularly in optical communication systems. Such a coupling is achieved by inserting the two terminations into a tubular connecting member with the longitudinal axes of the ferrules in alignment and the fibre ends at the ferrule tips either in contact or separated only by a body of transparent material having a refractive index matching that of the material of the fibres.
In order for form a satisfactory end-to-end optical coupling between two vitreous optical fibres, the end surface of each fibre is required to be substantially wholly flat and free from irregularities, and substantially orthogonal to the longitudinal axis of the fibre. The end preparation of the fibre, for achieving these conditions, can be effected by scoring the vitreous surface of the fibre at one point, over a portion of its circumference, and subjecting the fibre to longitudinal tension sufficient to sever it at the scored point, the scoring and severing being carried out under controlled conditions to ensure that a clean break, giving an optically flat fracture surface, is obtained.
The usual method of forming an optical fibre termination of the type referred to, by inserting a previously prepared end portion of the fibre into a ferrule, involves the somewhat delicate operation of locating the prepared fibre end precisely at, or just beyond, the tip of the ferrule. Furthermore, during its passage through the ferrule, the prepared fibre end may be damaged. It is an object of the present invention to provide an improved method of forming such a termination, whereby these difficulties can be overcome.
It is a further object of the invention to provide an improved optical fibre severing device for use in carrying out the said method.
According to the first aspect of the invention, a method of forming a termination on a vitreous optical fibre, as hereinbefore defined, includes the steps of providing a metal ferrule having at one end a tip with an axial aperture, forming within the ferrule a channel of a suitable diameter for accommodating an optical fibre, extending substantially along the longitudinal axis of the ferrule and in alignment with the said tip aperture, inserting an optical fibre into the end of the ferrule remote from the tip, along said channel and through said aperture until the free end of the fibre extends for a considerable distance (as hereinafter defined) beyond the ferrule tip, attaching the fibre to the ferrule, and then, while the ferrule is supported in a fixed position and a portion of the fibre at or near the free end thereof is clamped so that the length of fibre from the clamped portion to the ferrule tip is held straight, taut, and in alignment with the ferrule axis, scoring the fibre at the point of emergence thereof from the ferrule tip and applying longitudinal tension to the said length of fibre, to cause the fibre to be severed at the said point so as to form a prepared fibre end located in said aperture and flush with the end surface of the ferrule tip.
The axial channel within the ferrule is preferably a capillary of such diameter that the optical fibre will be a sliding fit therein, and may be formed in a body of thermo-setting resin otherwise filling the interior of the ferrule, by casting liquid resin around a mandrel extending along the ferrule axis, allowing the resin to solidify, and then withdrawing the mandrel.
Preferably the fibre is scored before it is subjected to the breaking tension, since this procedure tends to produce a cleaner break than that obtained if the fibre is scored while under tension.
In order to ensure that the scoring, and hence the severing, of the fibre is effected accurately at the point of emergence of the fibre from the ferrule tip, it is necessary to carry out these operations by means of an optical fibre severing device so designed that the ferrule can be retained in a required fixed position in relation to the path, orthogonal to the fibre axis, along which a scoring blade is caused to travel for scoring the fibre, and that lateral movement of the blade, to either side of its predetermined travel path, can be prevented.
According to the second aspect of the invention, therefore, an optical fibre severing device for carrying out the fibre scoring and severing steps of the method described above includes a fixed support for the ferrule and means for retaining the ferrule immovably in a predetermined position on said support, a clamp, for clamping a portion of the fibre at or near the free end thereof, which is so positioned relative to the ferrule support that when the ferrule is in said predetermined position the length of fibre from the clamped portion to the ferrule tip is held in alignment with the longitudinal axis of the ferrule, and which clamp is movable in the direction of said alignment, means for applying a load to the clamp and means for enabling the clamp to be urged, under the application of the load, away from the ferrule support and in the said alignment direction, for effecting tensioning of the fibre, a scoring blade and carrier arm therefor extending orthogonally to the said alignment direction and so located that the blade lies in a plane parallel to and immediately adjacent to the predetermined position of the end surface of the ferrule tip, and a pivotally mounted member on which the blade carrier arm is supported and pivotal movement of which causes the blade carrier arm to travel orthogonally to said alignment directed so that the blade is carried along said plane for scoring the fibre at its point of emergence from the ferrule tip, the pivotal mounting of the said member being between two points and of such a form that lateral movement of the blade carrier arm, and hence lateral movement of the blade to either side of said plane, during said travel is prevented.
It will be apparent that the length of fibre extending beyond the ferrule tip, after insertion of the fibre through the ferrule, must be sufficient to permit clamping of the free end of the fibre and to enable the required tension to be applied to the fibre: it will be understood that the expression "a considerable dis tance", used above with reference to the extension of the free end of the fibre beyond the ferrule tip means a sufficient distance for these requirements to be met.
Preferably the ferrule support is formed with a groove, for accommodating the ferrule, and is provided with a stop member overlapping one end of the groove for locating the ferrule tip, and with a retaining member overlying the groove for holding the ferrule firmly in position.
The blade carrier arm is preferably mounted on a rod or bar which is disposed orthogonally to the longitudinal axis of the arm and is pivoted at each end on the aforesaid pivotally mounted arm support member, for enabling the blade carrier arm to be lowered and raised with respect to the ferrule support, an arrangement being provided for causing lowering and raising of the arm during its travel orthogonally to the fibre alignment direction, so that the blade is successively brought into, and removed from, contact with the fibre. The pivotal mounting of the ends of the rod or bar is of the same form as that of the firstmentioned pivotally mounted support member, for ensuring that no lateral movement of the blade can occur.
The fibre clamp is suitably carried by, or formed integrally with, an elongate member such as a metal bar which is pivoted about a point substantially mid-way between its ends, the clamp being disposed at or near one end of the bar, and a load-applying means such as a spring being attached to the other end of the bar. The clamp is retained in the desired position for insertion of an optical fibre end by a restraining member abutting the clamp on the side thereof remote from the ferrule support, the restraining member being capable of rotation and being so shaped that, when rotated from its clamp-restraining orientation, it permits movement of the clamp away from the ferrule support, under the action of the load-applying means, for effecting tensioning of the fibre.The degree of tension applied to the fibre depends upon the magnitude of the load applied for effecting movement of the clamp.
A specific form of optical fibre severing device, for use in carrying out the method of the invention, is shown in the accompanying diagrammatic drawings and will now be described by way of example. In the drawings,
Figure 1 is a plan view of the device, with a ferrule and optical fibre in position, immediately prior to the carrying out of the fibre severing operations,
Figure 2 is a front elevation of the device as shown in Fig. 1,
Figure 3 is a plan view of the device after completion of the fibre severing operations, and
Figure 4 is a section drawn on the line
IV-IV in Fig. 3.
Like parts in the different figures of the drawings are indicated by the same reference numerals.
Referring to the drawings, the components of the device are mounted on a base plate 1 and a top plate 2, which are both screwed on to pillars 3: the device is designed for operation with the top and base plates disposed horizontally. It will be understood that the term "front end" as hereinafter applied to some of the components means the end seen in Fig. 2, and that "forward" movement of a component means movement towards that edge of the top plate 2 which is seen in Fig.
2.
A ferrule support block 4 is screwed on to the top plate 2; this block is formed with a Vgroove 5, of suitable dimensions for accommodating a portion of the ferrule including the tip thereof, and is provided with an adjustable stop, in the form of a lateral screw 6, adjacent to the V-groove, for locating the ferrule tip, and a leaf spring 7 is attached to the top of the block 4 so as to extend across the Vgroove.
A bar 8, on the front of which a fibre end clamp 9 is carried, is pivotally mounted on the top plate 2 by means of the screw 10; the rear end of the bar 8 is attached to one end of a tension spring 11, the other end of which is attached to the screw 1 2. Pivotal movement of the clamp bar 8, under the action of the spring 11, is restrained by a disc 1 3 having a flat portion 14 on its periphery, which disc abuts against the clamp 9, is rotatable about the screw 15, and is provided with a handle 16: rotation of the disc to bring the flat portion 14 into abutment with the clamp permits limited movement of the clamp away from the ferrule support 4.
A fibre scoring blade 1 7 (Figs. 2 and 4) is clamped into the front end of a blade carrier arm 1 8 by means of a blade support member 1 9 and screw 20. The blade carrier arm is mounted, near its rear end, on a support rod 21 which is mounted on a generally vertically disposed support plate 22 extending through an aperture 2a in the top plate 2; the ends of the rod 21 are pivoted on conical bearings 23 carried by end blocks 24 extending from the top of the plate 22, and the plate 22 is also pivotally mounted on conical bearings 25 similarly carried by extensions 26 from a bar 27 which is fixed to the base plate 1: both pairs of conical bearings suitably consist of conetipped screws co-operating with mating conical recesses formed in the ends of the rod 21 and in the sides of the plate 22, respectively.
The top of the plate 22 is recessed at 28, to allow free passage of the blade carrier arm 18 across the top of the plate.
As shown in Fig. 4, a vertical pin 29 is mounted on the top plate 2 adjacent to the ferrule support block 4, and the underside of the blade carrier arm 1 8 has a cam surfaced recess 30 arranged to cooperate with the pin 29 to cause vertical movements of the arm 18, by pivoting of the rod 21, as the arm travels forwards or backwards in response to pivotal movements of the plate 22.
A metal block 31, surmounted by a rubber pad 32, is provided on the top plate 2 for supporting the optical fibre "tail" during the severing operation. A rubber pad (not shown in the drawings) is also provided within the clamp 9.
In a specific example of the device shown in the drawings, the scoring blade 1 7 is formed of tungsten carbide, the leaf spring 7 is of phosphor bronze, the blade arm support rod 21 and the conical bearings 23 and 25 are of silver steel, the screws, including the stop 6, are of steel, and the remainder of the components and the plates 1 and 2 are formed of aluminium or an aluminium-based alloy. The cutting edge of the blade 1 7 is chamfered on the side of the blade which is directed away from the ferrule tip as the blade passes across the tip, the side of the blade which passes immediately adjacent to the ferrule tip being straight.
For the manufacture of an optical fibre termination by the method of the invention including the use of the device described above with reference to the drawings for severing the fibre, an optical fibre 33 is first inserted through a capillary channel along the axis of a ferrule 34, suitably of brass, and is attached to the rear end 35 of the ferrule by means of an adhesive. Then, with the fibre severing device arranged as shown in Figs. 1 and 2, the ferrule is placed in the position shown in the drawings, the narrower portion being supported in the V-groove 5 with the ferrule tip abutting the stop 6, and being held in position by the leaf spring 7.The fibre tail is laid over the support block 31, and the free end of the fibre is inserted into the clamp 9, care being taken to ensure that the free portion of the fibre is straight, taut, and aligned with the ferrule axis, and the fibre end is gripped by tightening the screw 36. The blade carrier arm can be lifted up to facilitate these operations. If desired, the fibre tail may also be held on the block 31 by clamp means (not shown). The fibre is then severed at its point of emergence from the ferrule tip by operation of the device in the following man ner:- The upper part of the plate 22 is first caused to pivot forward, from the position shown in Figs. 1 and 2 to that shown in Figs.
3 and 4, so that the blade carrier arm 1 8 travels forward to carry the blade across the ferrule tip. During the travel of the arm, the cam surface of the recess 30 travels over the tip of the pin 29, thus causing the arm 18, by pivoting of the rod 21, first to be lowered and then raised, so that the blade 1 7 is lowered sufficiently for the edge thereof to pass immediately in front of the ferrule tip and score the fibre, and is then raised out of contact with the fibre.The disc 1 3 is then rotated by means of the handle 1 6, until the flat portion 1 4 abuts against the clamp 9 as a result of pivoting of the clamp bar 8 under the force of the spring 11: the resulting movement of the clamp 9 applies sufficient tension to the fibre to cause it to break cleanly at the scored point. The arrangement of the fibre severing device is now as shown in Figs. 3 and 4.
The two sets of conical pivot bearings 23 and 25, by means of which the required movements of the blade carrier arm are effected, ensure that no lateral movement of the arm during its forward travel can occur, thus ensuring accurate scoring of the fibre at the ferrule tip.
In operation of the form of the fibre severing device shown in the drawings, the plate 22 is pushed forward manually. However, if desired, the device may be modified by the provision of mechanical means for moving the plate: for example, a suitable arrangement may comprise a spring drive, operated by a lever suported on or beneath the top plate 2, and associated with a dash pot for controlling the rate of movement of the plate 22 and hence of the blade carrier arm 1 8.
If the optical fibre has a protective resin coating, it is not necessary to remove this coating before forming the termination, provided that the fibre severing device is so arranged that the blade can cut through the coating and score the underlying fibre. In another modification of the device, not shown in the drawings, a small weight may be attached to the top of the blade carrier arm, if the weight of the arm itself is insufficient to ensure that the fibre is scored to an adequate depth.
Claims (9)
1. A method of forming a termination on a vitreous optical fibre, as hereinbefore defined, which includes the steps of providing a metal ferrule having at one end a tip with an axial aperture, forming within the ferrule a channel of a suitable diameter for accommodating an optical fibre, extending substantially along the longitudinal axis of the ferrule and in alignment with the said tip aperture, inserting an optical fibre into the end of the ferrule remote from the tip, along said channel and through said aperture until the free end of the fibre extends for a considerable distance (as herein before defined) beyond the ferrule tip, attaching the fibre to the ferrule, and then, while the ferrule is supported in a fixed position and a portion of the fibre at or near the free end thereof is clamped so that the length of fibre from the clamped portion to the ferrule tip is held straight, taut, and in alignment with the ferrule axis, scoring the fibre at the point of emergence thereof from the ferrule tip and applying longitudinal tension to the said length of fibre, to cause the fibre to be severed at the said point so as to form a prepared fibre end located in said aperture and flush with the end surface of the ferrule tip.
2. A method according to Claim 1, wherein the axial channel within the ferrule is a capillary of such diameter that the optical fibre will be a sliding fit therein, and is formed in a body of thermosetting resin otherwise filling the interior of the ferrule, by casting liquid resin around a mandrel extending along the ferrule axis, allowing the resin to solidify, and then withdrawing the mandrel.
3. A method according to Claim 1 or 2, wherein the fibre is scored before it is subjected to the severing tension.
4. An optical fibre severing device, for carrying out the fibre scoring and severing steps of the method according to Claim 1, 2 or 3, which includes a fixed support for the ferrule and means for retaining the ferrule immovably in a predetermined position on said support, a clamp for clamping a portion of the optical fibre at or near the free end thereof, which clamp is so positioned relative to the ferrule support that when the ferrule is in said predetermined position the length of the fibre from the clamped portion to the ferrule tip is held in alignment with the longitudinal axis of the ferrule, and which clamp is movable in the direction of said alignment, means for applying a load to the clamp and means for enabling the clamp to be urged, under the application of the load, away from the ferrule support and in the said alignment direction, for effecting tensioning of the fibre, a scoring blade and carrier arm therefor extending orthogonally to the said alignment direction and so located that the blade lies in a plane parallel to and immediately adjacent to the predetermined position of the end surface of the ferrule tip, and a pivotally mounted member on which the blade carrier arm is supported and pivotal movement of which causes the blade carrier arm to travel orthonogally to said alignment direction so that the blade is carried along said plane for scoring the fibre at its point of emergence from the ferrule tip, the pivotal mounting of the said member being between two points and of such a form that lateral movement of the blade carrier arm, and hence lateral movement of the blade to either side of said plane, during said travel is prevented.
5. A device according to Claim 4, wherein the ferrule support is formed with a groove for accommodating the ferrule, and is provided with a stop member overlapping one end of the groove for locating the ferrule tip, and with a retaining member overlying the groove for holding the ferrule firmly in position.
6. A device according to Claim 4 or 5, wherein the blade carrier arm is mounted on a rod or bar which is disposed orthogonally to the longitudinal axis of the said arm and is pivoted at each end on the said pivotally mounted arm support member, for enabling the said arm to be lowered and raised with respect to the ferrule support, and wherein an arrangement is provided for causing lowering and raising of the said arm during its travel orthogonally to the fibre alignment direction, so that the blade is successively brought into, and removed from, contact with the fibre.
7. A device according to Claim 4, 5 or 6, wherein the said clamp is carried by, or formed integrally with, an elongate member which is pivoted about a point substantially midway between its ends, the clamp being disposed at or near one end of the elongate member and a load-applying means being attached to the other end of said member.
8. A device according to Claim 4, 5, 6 or 7, which includes a restaining member abutting the clamp on the side thereof remote from the ferrule support, for retaining the clamp in the required position for insertion of an optical fibre therein, which restaining member is capable of rotation and is so shaped that, when rotated from its clamp-restraining orientation, it permits movement of the clamp away from the ferrule support, under the action of the load-applying means, for effecting tensioning of the fibre.
9. An optical fibre severing device according to Claim 4, substantially as shown in, and as hereinbefore described with reference to, the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8019115A GB2052790B (en) | 1979-06-14 | 1980-06-11 | Forming optical fibre terminations |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7920810 | 1979-06-14 | ||
| GB8019115A GB2052790B (en) | 1979-06-14 | 1980-06-11 | Forming optical fibre terminations |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2052790A true GB2052790A (en) | 1981-01-28 |
| GB2052790B GB2052790B (en) | 1983-06-29 |
Family
ID=26271846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8019115A Expired GB2052790B (en) | 1979-06-14 | 1980-06-11 | Forming optical fibre terminations |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2052790B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0092304A1 (en) * | 1982-04-20 | 1983-10-26 | G & H Technology, Inc. | Apparatus for cleaving an optical fiber |
| EP0105909A1 (en) * | 1982-04-21 | 1984-04-25 | Western Electric Co | Precision cleaving of optical fibers. |
| FR2535706A1 (en) * | 1982-11-10 | 1984-05-11 | Guilloux Jean Yvon | Process and device for cutting an optical fibre. |
| EP0118803A2 (en) * | 1983-03-10 | 1984-09-19 | Amphenol Corporation | Apparatus for cleaving an optical fibre relative to a fibre optic connector |
| FR2552889A1 (en) * | 1983-09-29 | 1985-04-05 | Souriau & Cie | METHOD FOR PRODUCING A PARTICULARLY OPTICAL FIBER CONNECTOR SHEET AND DEVICE FOR CARRYING OUT THE METHOD |
| JPS60159709A (en) * | 1984-01-30 | 1985-08-21 | Nippon Sheet Glass Co Ltd | Cutting method of optical fiber |
| GB2175410A (en) * | 1985-04-03 | 1986-11-26 | Stc Plc | Optical fibre fusion splicing |
| EP0223609A2 (en) * | 1985-11-20 | 1987-05-27 | RAYCHEM CORPORATION (a Delaware corporation) | Contact for terminating an optical fiber |
| FR2615631A1 (en) * | 1987-05-21 | 1988-11-25 | Radiall Ind | METHOD FOR PLACING AN OPTICAL FIBER IN AN OPTICAL FIBER CONNECTOR ELEMENT, AND CONNECTOR ELEMENT FOR IMPLEMENTING THE METHOD |
| EP0096511B1 (en) * | 1982-06-05 | 1989-08-23 | AMP INCORPORATED (a New Jersey corporation) | Optical fibre termination method, terminal, splice, and connector therefor |
| USRE34005E (en) * | 1985-11-20 | 1992-07-21 | Raychem Corporation | Contact for terminating an optical fiber |
-
1980
- 1980-06-11 GB GB8019115A patent/GB2052790B/en not_active Expired
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0092304A1 (en) * | 1982-04-20 | 1983-10-26 | G & H Technology, Inc. | Apparatus for cleaving an optical fiber |
| EP0105909A1 (en) * | 1982-04-21 | 1984-04-25 | Western Electric Co | Precision cleaving of optical fibers. |
| EP0105909A4 (en) * | 1982-04-21 | 1984-08-20 | Western Electric Co | Precision cleaving of optical fibers. |
| EP0096511B1 (en) * | 1982-06-05 | 1989-08-23 | AMP INCORPORATED (a New Jersey corporation) | Optical fibre termination method, terminal, splice, and connector therefor |
| FR2535706A1 (en) * | 1982-11-10 | 1984-05-11 | Guilloux Jean Yvon | Process and device for cutting an optical fibre. |
| EP0118803A2 (en) * | 1983-03-10 | 1984-09-19 | Amphenol Corporation | Apparatus for cleaving an optical fibre relative to a fibre optic connector |
| EP0118803A3 (en) * | 1983-03-10 | 1987-04-08 | Amphenol Corporation | Apparatus for cleaving an optical fibre relative to a fibre optic connector |
| EP0138674A3 (en) * | 1983-09-29 | 1985-11-06 | Souriau Et Cie | Process for manufacturing an optical fibre connector plug and apparatus to carry out this process |
| EP0138674A2 (en) * | 1983-09-29 | 1985-04-24 | Souriau Et Cie | Process for manufacturing an optical fibre connector plug and apparatus to carry out this process |
| FR2552889A1 (en) * | 1983-09-29 | 1985-04-05 | Souriau & Cie | METHOD FOR PRODUCING A PARTICULARLY OPTICAL FIBER CONNECTOR SHEET AND DEVICE FOR CARRYING OUT THE METHOD |
| JPS60159709A (en) * | 1984-01-30 | 1985-08-21 | Nippon Sheet Glass Co Ltd | Cutting method of optical fiber |
| GB2175410A (en) * | 1985-04-03 | 1986-11-26 | Stc Plc | Optical fibre fusion splicing |
| EP0223609A2 (en) * | 1985-11-20 | 1987-05-27 | RAYCHEM CORPORATION (a Delaware corporation) | Contact for terminating an optical fiber |
| EP0223609A3 (en) * | 1985-11-20 | 1988-08-24 | Raychem Corporation (A Delaware Corporation) | Contact for terminating an optical fiber |
| US4790622A (en) * | 1985-11-20 | 1988-12-13 | Raychem Corp. | Contact for terminating an optical fiber |
| USRE34005E (en) * | 1985-11-20 | 1992-07-21 | Raychem Corporation | Contact for terminating an optical fiber |
| FR2615631A1 (en) * | 1987-05-21 | 1988-11-25 | Radiall Ind | METHOD FOR PLACING AN OPTICAL FIBER IN AN OPTICAL FIBER CONNECTOR ELEMENT, AND CONNECTOR ELEMENT FOR IMPLEMENTING THE METHOD |
| EP0294270A1 (en) * | 1987-05-21 | 1988-12-07 | RADIALL, Société Anonyme dite: | Method of inserting an optical fibre into a fibre optic connector element and connector element for carrying out this method |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2052790B (en) | 1983-06-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |