Method of making ceramic connector for connecting optical fibres
SUBSTANCE: zirconium dioxide powder is mixed with temporary process binder. Injection moulding is carried out with a rod made of fluorocarbon-based material, which is removed together with the temporary process binder with further sintering.
EFFECT: reduced signal loss owing to simple achievement of coaxiality of capillary openings.
This invention relates to a ceramic connectors connecting the optical fiber communication lines, integrated circuits, semiconductor devices. Ceramic splice products fiber-optic communication lines (FOCL) must be able to withstand extreme environmental conditions and have high precision capillary holes (0,126+0.001 mm for single-mode fibers; to 0.127+0,004 mm for multimode fibers). The capillary hole in a ceramic ferrules must be precisely aligned with the outer surface of the connector, to prevent any longitudinal displacement of the fiber relative to the connecting joint during operation to minimize optical losses. Through a narrow capillary hole should be easy to pass the optical fiber. Quality ceramic connectors for fiber optic is determined by the molding method.
It is known that the optimal method of manufacturing a ceramic connectors with the capillary hole, the size of which is maximally close to the nominal, is injection molding. In the patent (U.S. No. 5034170, VS 45/80) presents a technical solution associated with high-precision adjustable injection molding singlemode optical connectors.
This method requires the production of high-precision complex the s forms, which increases the cost of manufacture of ceramic optical connectors.
The dimensional accuracy of the inner bore, outside diameter and alignment of these diameters are determined by the precision mold making and molding of the rod while casting.
In the invention of the firm TOTO Ltd (USA, No. 5615291 G0B 6/36 25.03.1997) as forming the capillary hole of the stem in the blank ceramic connector applies the rod of tungsten carbide.
The closest technical solution is the solution that is presented in the patent (Japan, No. 1-45042). In this method, the injection molding as forming the capillary holes of the rod used wire of Nickel alloys. This method does not give the maximum approximation to the nominal dimensions of the capillary holes, so you need a long grinding holes. Prolonged use of grinding holes leads to the fact that on the inner surface defects remain, bringing damage to the optical fiber when inserted into the connector. In this way the wire should be pulled from the hole, which leads to defects in the inner surface of the capillary holes.
The purpose of the invention to provide a preform of ceramic capillary tip with a hole, the size of which max is maximum close to the nominal and the inner surface of the hole for the optical fiber has no defects.
The objective is achieved by use of injection molding a ceramic powder mixed with a temporary process a bunch of plastic into the mold forming the capillary hole of the rod from the leader (PVDF-polyvinylidene fluoride).
This material has the hardness, strength, ability at pressures of pomevania 1500-2000 and temperatures up to 150-160°C to retain their dimensions accurate to a micron. This rod remains in forming inside the workpiece connector and removed along with the temporary technological bonded during sintering the billet tip.
The method is as follows.
As the original powder was used powder of Zirconia composition ZrO2+3 mol.% Y2About3obtained by chemical vapor deposition from solutions of salts.
The powder had the following properties:
The specific surface of particles S=8-10 m2/g;
Based density γ=6,0-of 6.02 g/cm3;
The crystallite size of 35-40 nm;
The size of the agglomerates of 0.5-1 μm.
The powder was mixed at a temperature of 170°C for 2 h with a time of technological bunch Siliplast - BUT (F., "Zschimmer-Schwarz"), in the amount of 17.5 wt.%. From this mass at a temperature of 140°C using a granulator manufactured granules of 3-mm Forming blanks were performed on automatic molding machine with the following parameters: injection pressure 1500-1600 bar, the temperature of the ceramic material 140-160°C, mould temperature of 60°C. the Injected plastic mass (slip) was in the form with the shank of the leader. After hardening rod cut from 2 sides. Billet ceramic connectors to flurocarbons rods in capillary holes was immersed in running water, heated to 70°C., for 2 hours At 60 wt.% ligament is removed from the mass of the workpiece and retains the shape of the tips of the capillary bore. Sintering of lugs carried out in 2 stages in electric furnaces. The first stage of sintering up to 1000°C for 2 h, the second - final sintering at temperatures of 1400-1500°C. Sintered billet connectors were cut along the capillary holes-and they were measured properties. The table presents the results of measurements of surface roughness, defects after sintering to mechanical processing.
|% experiment||Stem material||The surface roughness of the hole, mcm|
|1||the leader||from 0.3 to 0.48||1,6-1,83||and 2.26-2,5|
|2||Wire stainless steel, coated with Teflon||1,2-2,0||6-10||20-22|
|3||Wire - Nickel alloy||0,8-1,2||2,2-2,6||6,9-7,6|
The invention allows to simplify obtaining alignment of the capillary holes and to reduce the cost of manufacture of ceramic connectors. The surface of the inner capillary openings is defect-free.
Method of manufacturing ceramic connector for connecting optical fibers comprising a mixture of a powder of zirconium dioxide with a time of technological ligament, injection molding into the mold forming the capillary hole of the core, removing the temporary technological binder and sintering, wherein forming the rod is made of a material based on leader, who remains Ave is forming inside the workpiece connector and removed along with the temporary technological bonded during sintering.
SUBSTANCE: fibre-optic socket has a housing with a centraliser, the centraliser being in form of a floating coupler, having an annular groove in the central part of the outer cylindrical surface, and opposite ends of the floating coupler have conical outer surfaces. The housing of the fibre-optic socket has an inner annular groove in which an additional fixing element is inserted, said element being located in the annular groove of the floating coupler. The floating coupler can be in form of a resilient collet element and has one or more elements; the fixing element of the floating coupler can be in form of an resilent split ring. Opposite ends of the resilient collet element have conical outer surfaces. The resilient collet element can have in the central part of the outer cylindrical surface a protrusion for fixation thereof in the annular groove of the housing of the fibre-optic socket.
EFFECT: high impact and vibration resistance of the fibre-optic socket while maintaining accuracy of accuracy of coupling ferules of convectors and simple design.
6 cl, 8 dwg
SUBSTANCE: fibre-optic connector for use together with a fibre-optic adapter has a connector housing, having an end which forms a pluggable section. A casing unit is placed inside the housing. A sealing element is placed around the outer side of the housing of the connector to form a seal between the housing of the connector and the adapter. The fibre-optic connector also has first and second separated means of fastening the fibre-optic connector inside the fibre-optic adapter. The housing has a main part which stretches from the far end to the near end, and a cover. A channel passes through the housing of the connector.
EFFECT: compact design, which enables to achieve high packaging density.
13 cl, 23 dwg
SUBSTANCE: assembly of a mounting support and a fibre-optic connector adapter are mounted on a support, wherein the adapter has an axis for placing the connector and at least one lateral mounting projection on one of its sides. The mounting support has vertical walls passing upwards from the support on both sides of the said adapter, the wall elements of which define mounting slots adapted to receive said mounting projections of the adapter. The slots are formed to allow movement of the adapter between a first position in which the adapter is supported with its axis at an acute angle to the support, and a working position in which the adapter is supported essentially parallel to the support. The wall elements define, in the slots, shoulders on which the mounting projections of the adapter are supported. There is a resilient vertical wall element on the shoulder to removably support the mounting projection.
EFFECT: simple design of the assembly.
3 cl, 6 dwg
FIELD: machine building.
SUBSTANCE: proposed optical connector comprises case and coupling fixed in said case. Case may be connected with seat. Said coupling comprises rotary head and main part. Rotary head can house ferule and be connected to coupling main part front end to turn relative to coupling main part front end at lateral pull preset force applied to connector and/or optical fiber.
EFFECT: perfected connector.
15 cl, 18 dwg
SUBSTANCE: connector for a fibre-optic cable or connection of switching cords comprises a body, an adapter for an optical connector, a holder for an adapter and a facility to release stresses in a cable or a cord attached to a body. The holder may be integral with the body or be fixed on it or in it, and provides for limited displacement along the adapter axis inside the holder. The value of axial shift is more than the value of shift from bending deformation of the body, which is caused in the place of fixation of the facility for release of stresses by means of manual withdrawal of a cable or a cord from the body.
EFFECT: reduced effect of body deformation as a result of pulling along an axis caused by any type of applied stress on a cable or a cord, release of stresses from a cable inside a slot.
5 cl, 8 dwg
SUBSTANCE: device has outer body made from an elastically deformable material, a cylindrical guide having a front portion attached in the rear portion of the outer body and a rear portion protruding from the rear portion of the outer body. A cable adapter extends through the cylindrical guide. An elongated floating ferrule extends through the front portion of the outer body. The ferrule is connected to a ferrule holder movably mounted in said outer body. A support means rests on the first shoulders of the outer body, and a helical spring provided between the front portion of the cylindrical guide and the support means of the ferrule holder. The cable adapter is mounted so as to float within the cylindrical guide.
EFFECT: improved contact.
12 cl, 2 dwg
FIELD: instrument making.
SUBSTANCE: device comprises a tight body in the form of a sleeve, at end covers of which there are assemblies of power closing of armoured winding and assemblies of cable sealing. Inside the tight body there are cassettes installed to lay optic fibres and areas of their welding and end bending couplings. Additionally in the body there are compensators of optic fibres movements made in the form of optic fibre loops placed in protective jackets. Modules of optic fibres contain sections in the form of rings attached to each other. The tight body is equipped with a protector made in the form of two jackets that cover the sleeve of the tight body with a gap and rigidly fixed with it by one end.
EFFECT: increased reliability of coupling for underwater fibre-optic cables with a central module.
2 cl, 6 dwg
SUBSTANCE: fibro-optical connector arranged on optical fiber end has casing to be connected to LC socket and cartridge assembly comprising sleeve and ring. Cartridge assembly is filled with thermoplastic semi-crystalline glue. Thermoplastic material can be made on the base of polyamide with high melting temperature. Fibro-optical connector can comprise optical fiber fitted in cartridge with the help of said thermoplastic material. Position of said optical finer in said cartridge by heating and subsequent cooling.
EFFECT: fibro-optical connected can be easily fitted in-situ during short time intervals.
6 cl, 6 dwg
SUBSTANCE: optical connection element and a connector are designed such that they can be made using a forming method with allowance of not less than 1000 nm. The said components also have sealing rings and sleeves. The sealing ring may consist of two identical halves which are forged and gathered together. Alternatively, the sealing rings may be designed such that, they can be made through moulding or a combination of forging and moulding methods. A pair of sealing rings which hold one or more optical fibres is joined using a high-precision split sleeve without additional aligning tools.
EFFECT: easier making a connection element without reduction of accuracy of joining optical fibres.
16 cl, 43 dwg
FIELD: physics; optics.
SUBSTANCE: connector consists of two opposite hollow half-couplings inside of which there are connected optical fibre sections. On butt-ends of the optical fibre sections there are optical multilayer transformers which provide matched non-reflection transition from the optical fibre medium with refraction index nof>1 to air medium (n0=1) of a gap with size of 1-2000 the medium wavelength of the signal transmitted through the optical fibre (λ0) formed by between the outer layers of the opposite optical transformers.
EFFECT: lower power loss level at the joint in the given wavelength range.
4 cl, 8 dwg
SUBSTANCE: device has two fixing devices for receiving two single pin connectors with forming of one duplex pin connector. Fixing means are made so that they envelope at least partially the pin body and means for protecting cable from bends, to be subject to placement in socket of pin connector. Fixing means is made in form of C-shaped socket, to which rectangular socket is adjacent, practically having L-like shape. On upper side of device an arc-shaped element can be placed, which in fixed position of simplex pin connectors envelopes their contacts.
EFFECT: higher efficiency.
2 cl, 6 dwg
FIELD: fiber-optic communications.
SUBSTANCE: device has body and elements for pressurization of light guide. In hollow of body pressurizing element is inserted, in form of resilient compactor vulcanized on optic cable with glue previously applied to vulcanization area and made with conic outer surface at one end, contacting with body, and at other end pressing nut is mounted. Between guiding elements of guide and body compacting rings are placed.
EFFECT: reliable operation under pressure up to P = 14,7106/Pa and under loads of up to 500g.
2 cl, 2 dwg
FIELD: engineering of connecting devices for fiber-glass connectors.
SUBSTANCE: device contains front panel 2,4,202 and simplex or two-channel connecting sleeve 1,1',1'',201,207, made with possible insertion into front panel 2,4,202 and with possible disengagement from front portion side, and containing connecting sleeves, which are made with possible blocking in front panel 2,4,202 by means of blocking springs 14,14',14'',214. Besides pin sockets 21,41 for inserting connecting sleeves, front panel 2,4,202 has apertures 22,23,45,46 made in several positions on its front portion for disengaging connecting sleeves, which have flanges 12,121,212,212' for positioning on frontal portion of front panel 2,4,202, and blocking spring 14,14',14'',214 for hooking to front panel 2,4,202 behind the latter.
EFFECT: simplified construction of device.
2 cl, 14 dwg
SUBSTANCE: method comprises connecting first fiber (20) with first specially oriented key member (4), setting key member (4) into holder (29) that receives the key member only when it is specially oriented, cutting fiber (20) at a given angle with respect to holder (29) to form a sloping face (24) of the fiber, removing the key member from the holder, setting the key member into housing (2) of the device for joining that receives the key member only when it is specially oriented so that sloping surface (24) of the fiber is in a given radial position with respect to the housing of the device. The operations are repeated for second fiber (21) and second key member (5).
EFFECT: enhanced precision of connecting.
13 cl, 6 dwg
FIELD: sleeve for installation of plug connectors therein.
SUBSTANCE: the sleeve contains mobile cover, engaged with barrel aperture. In first position the intersection laps over the barrel aperture. On insertion of plug connector it moves to second position. Intersection frees the barrel aperture. Intersection contains curved metallic flat spring. The flat spring in first position is unloaded. The curve of the flat spring is selected in such a way, that the tip of plug connector never comes into contact with flat spring at any moment of concatenation process. The flat spring is positioned tangentially to side surface of connecting part. Two wings are positioned adjacently to the side surface, by means of which wings the intersection is connected to internal surfaces of connecting part body.
EFFECT: creation of sleeve having small outward size, which prevents harmful laser radiation from exiting and does not have high manufacturing costs.
6 cl, 8 dwg
FIELD: connection of optical fibers.
SUBSTANCE: connector used for connecting two optical fibers has longitudinal case. Case has first end and second end. Case is provided with channel for fiber, which channel goes along axis from mentioned first end of case to mentioned second end of case. Case is made for reception of mentioned ends of two optical fibers. Case is divided to multiplicity of fingers, which fingers go in longitudinal direction in any end of first and second ends of case. Fingers in first end of case are shifted along circle for preset value from fingers at second end of case. Fingers at first end of case overlap at axial direction fingers at second end for preset value. At least some of fingers have parts in form of harmonicas, where fingers are divided to multiplicity of harmonica-shaped fingers which go in lateral direction. Case is made to be brought into open position to contain mentioned optical fibers in channel for fibers. Case is also made for deformation uniformly after it is brought into mentioned open position. As a result, case is made for perform of sequence which consists in centering of mentioned optical fibers, compression of mentioned optical fibers one against other and clamp of mentioned optical fibers to fix those fibers at preset position. Case is made for application of first stresses in that site of channel for fiber where mentioned optical fibers make contact one with other. Case is also made for application of second stresses close to first and second ends. Mentioned second stresses exceed essentially mentioned first stresses.
EFFECT: higher efficiency of connection; simplicity of usage; good passage of signal among optical fibers.
4 cl, 10 dwg
FIELD: physics, optics.
SUBSTANCE: invention concerns fibre optics and optronics. It can be applied to linking of groups of fiber-optical cables among themselves. In the socket the centralisers are executed from an elastic material. One of edges of a gash of every centraliser is fixed in a socket material. On other edge from each leg of a tip there are salients. From each leg of the fiber-optical socket the slider is available. There are holdfasts of an open standing of the socket. At centre of each of the socket legs, there are the buttons relieving a holdfast. Each fiber-optical plug has the mobile lattice of squeezing of springs or an elastic material for plug tips springing. In each plug there is a lever. There is a device of fixing of a lattice. Vacuities of the centralisers densely sweep plug tips. Thus moves a slider, fixing a plug in the socket and voiding the mobile lattice for travel. The elastic material creates necessary effort of squeezing of end faces of tips.
EFFECT: simplification of linking and socket release, the small sizes of a socket at linking of major number of fibrils, pinch of accuracy of alignment and making of necessary clamping effort of end faces of fibrils on each pair of joined light guides, possibility of installation of optical fibrils in fiber-optical plugs in field requirements that allows to refuse application in fiber-optical networks of patch-panels.
2 cl, 8 dwg
FIELD: physics, communication.
SUBSTANCE: invention is related to device for seizure and splicing of optic fibers. Device comprises part that has hingedly joined the first and second elements. Part has seizure area, which includes the first and second seizing parts, which are located on the first and second internal surfaces of every element. Part additionally comprises the first and second areas of compression along length of seizure area. Device for seizure and splicing of optic fibers additionally comprises tip arranged with the possibility of engagement with part for selective actuation of the first compression area independently on actuation of the second compression area.
EFFECT: seizure and splicing may be performed with multiple areas of seizure/splicing, which provides for different level of action that might be transmitted to optic fiber located in certain zone and in certain place, according to sequence of splicing.
8 cl, 8 dwg
SUBSTANCE: proposed multifunctional socket coupler and multifunctional coupling plug assembly contains the socket coupler base (11) and the socket coupler polymeric protective cover (21) with electric connection throughholes (151a, 151b) and the fibre throughhole (131, 131a, 131b) distanced from the electric connection throughholes (151a, 151b). It also contains a guide element (23, 91, 93) designed to provide for the optical fibre (61) cleared end reception and positioning in a pre-defined relationship to the fibre throughhole (131) and a clamping element (71, 83) for the optical fibre (61) reversive clamping with the fibre end in a pre-defined relationship to the fibre throughhole (131). The above socket coupler polymeric protective cover (21) is designed to enable axial and transverse direction of the optical fibre.
EFFECT: fabrication of a multifunctional socket coupler and multifunctional coupling plug assembly characterised by cost-efficiency of manufacture, installation simplicity and fitness for flexible (multifunctional) applications.
22 cl, 6 dwg
SUBSTANCE: fibre-optic connector for mechanical splicing of first and second optical fibres with removed coatings has a case which is divided into sections which are arranged such that, optical fibres can be clamped. The case has at least three independently opening main clamping sections, with dimensions which allow for directly clamping the naked part of the first and second optical fibres, and at least one additional independently opening clamping section with dimensions which allow for clamping the coated part of one of the optical fibres. Clamping sections are made such that, the first optical fibre can be clamped by the first main clamping section independent of the second optical fibre, making it possible to clamp the first optical fibre from rotation and axial displacement relative the case of the connector, so as to essentially leave untouched the next clamping or unclamping of the second fibre. The second of the three main clamping sections can only clamp the second fibre, and the third can only clamp the first and second fibres at the same time.
EFFECT: simple design.
20 cl, 11 dwg