Universal fibre-optic rotating connector

FIELD: oil and gas extraction.

SUBSTANCE: fibre-optic rotating connector with a symmetrical structure has a housing in which there is a first and a second fibre-optic waveguide. The first fibre-optic waveguide is mounted in the first optical terminal piece which is fixed in bearing housings with possibility of rotation. There is a spacer ring between the bearings. The second fibre-optic waveguide is mounted similarly. The optical terminal pieces are pressed to each other by springs and coupling nuts. Displacement between optical axes of the fibre-optic waveguides is the limiting value of the radial beat of the inner ring of the roller bearing is defined by the expression: where α is the radius of the fibre-optic waveguide, Pi is the power at the end of the transmitting waveguide, Pp is the power at the end of the receiving waveguide, z is the distance between ends of interfaced waveguides, NA is the numerical aperture of the fibre-optic waveguide, r=α+z·tgα is the radiation field distribution radius in the plane of the end of the receiving waveguide, sinα=NA.

EFFECT: simple design, reliability, low optical loss.

4 cl, 1 dwg

 

The invention relates to the elemental basis of fiber-optic technology, and specifically, to fiber optic rotary connectors, and can be used in fiber-optic communication lines.

Known fiber optic rotary connector [1], providing a mutual rotation of the two fibers, each fiber of the fiber is centered in the tip coaxially with gradient lens and fixed in the device, which can rotate relative to each other; a connector provided with a mechanism of forced alignment on the basis of the magnets to ensure the alignment of the tips with gradient lenses. You can change the direction of the transmitted light through the connector threads with the help of mirrors. Mutual rotation of the devices is carried out by means of rolling bearings.

The disadvantages of this connector include the complexity of the optical system of the formation and direction transmitted through the connector radiation, which requires time-consuming alignment of the tip optical axis wakanoho fiber relative to the optical axis gradient lenses. Not less time-consuming alignment process is the setting of the optical axes of the gradient lenses relative to the mirrors. In this regard, the optical loss in the connector reaches 3 dB, i.e. lost Provinciale transmit power (for comparison, in the stationary plug connector losses are measured values, not more than 0.1 dB). Use this connector gradient lenses with a flat working surface, perpendicular to the optical axis leads to a significant backscattering (-25 dB), which degrades the quality of information transmitted through the communication line. The use of magnets can withdraw the connector from the system, if he is in the area of the magnetic field. The design of this connector does not meet the conditions of the operational and technological simplicity.

Known fiber optic rotary connector [2], consisting of a fixed part and a movable parts, mating among themselves by means of rolling bearings; in each part are single-mode fiber, a device for coaxially mounting the fiber relative to the axis of rotation of the connector and the device to expand and collimate the radiation passing through the connector to ensure optimal from the point of view of losses, the passage of radiation through the connector; the area between the devices to expand and collimate the sealed and filled with the immersion liquid, also in the fixed part of the hosted device to fill the immersion fluid and the valve to compensate for excess pressure; at the same time to expand and collimate the beam applied gradient,aspherical, spherical lens, the lugs, the ends are perpendicular to the axis of rotation of the connector; in addition, the movable part can be made in the form of a cone.

The disadvantages of this invention is the complexity of the design of the connector. Expansion and collimation of the radiation passing through the connector is achieved by using additional optical elements: spherical, aspherical and gradient lenses, the manufacturing error which inevitably cause additional optical loss of the entire connector. These connectors are difficult to manufacture as they require complicated adjustment operations when the coupling lens with the optical fiber. Additional connection of the lens with the optical fiber causes an additional loss of the entire connector. Use connector immersion fluid causes and constructive, and technological complexity due to the need to make additional holes and valves. The manufacture of the movable part in the form of a cone also ethnologica.

Consider the connector has a main drawback - rotating only the rolling element, i.e. one part of the fiber-optic line can rotate, the other must be static, which in some circumstances can lead to the output line of the Troy.

In the prototype, there is no standardization of parts and components of the connector. Mounting the optical fiber in a fixed part carried by the lug, nut, special case and insert. The mount is identical to the optical fiber in the movable element carried by the lug, nut, casing, rotor, bearing and insert. However, none of the details of the mounting of the first optical fiber is not identical to the details of the mounting of the second optical fiber.

The objective of the invention is to provide simple in design and manufacture, reliable in operation, with low optical losses, thus achieving small losses should be provided as optical methods, and original design solutions, which are based on the achievement of two goals one constructive element, low cost standardized fiber optic rotary connector.

The technical result is achieved by the fact that fiber-optic rotary connector includes a housing that holds the first and second optic fibers, the first fiber, the fiber is fixed in the first optical tip, which is fixed in the bearing housing for rotation, and the second optic fiber attached similar to the first, both optical Nikon is cnica pressed toward each other by springs and coupling nuts, associated with the housing, with the end faces of optical fibers is made in the form of a sphere of positive radius, with an offset between their optical axes of optical fibers is determined by the expression [3, 4]:

,

where x is the offset between the axes of the joined fibers (μm), α is the radius of the fibre (μm), Rand- power on the transmitting end of the fiber (W), Rp- power on the receiving end of the fiber, z is the distance between the ends of spliced optical fibers (μm), NA is the numerical aperture of the fibre, r=α+z·tgα - radius distribution of the radiation field in a plane coincident with the plane of the end face of the receiving fiber, sinα=NA.

Structurally, the proposed fiber-optic rotary connector is a single complete Assembly unit, characterized by the symmetry of execution. Because the connector consists of standardized components and parts, which include commercially available optical tips, bearings, springs and optic fibers and the manufacture of the body is not technologically complex operation, the manufacture of the connector as a whole is simple and cost cheap. Furthermore, the design of the connector ensures the reliability of its operation in the temperature range-40-+60°C connector is egco achieved the required level of optical loss, compared to the analogue and prototype in this connector was much less. Such low optical losses inherent in the stationary plug connectors, achieved by choosing the optical tips and bearings with accuracy parameters that satisfy the requirements of theoretical calculations. In addition, the optical ends of spliced optical fibers have a spherical surface with a positive radius of curvature. This allows in addition to minimize optical loss to achieve their stabilization in time and in the process impact of operational factors by eliminating mechanical friction between the surfaces of the ends of optical fibers.

Special attention to achieve low optical insertion loss connector paid to the fixing roller bearings in the housing of the connector and the optical tip in the inner ring of the bearing. The fact that the accuracy of the docking cores of the optical fibers is substantially influenced by such bearings as radial runout of the inner ring relative to the external, lateral runout on the raceways of the inner and outer rings.

In the present invention are made of optical losses due to radial runout, are eliminated by the choice of the type of rolling bearing, which has the largest radial the CSO beats is selected equal to or lower than the estimated value of the offset x between the axes of the optical fibers. This choice allows you to minimize optical insertion loss due to lateral misalignment of the optical fibers. Lateral runout on the raceways of the inner and outer rings eliminates pressure on the inner ring of the bearing spring, and this pressure is transmitted through the flange of the optical tip and tight fit of the bearing on the tip. Thus, the spring solves two problems: elimination of lateral runout on the raceways of the inner and outer rings of the bearings and providing a mechanical contact between the optical tips. Ultimately, these objectives are aimed at achieving minimal insertion caused by longitudinal misalignment of the optical fibers. Angular misalignment between the axes of the fibers is eliminated by the use of at least two bearings, selected by the above criteria.

The proposed unified fiber optic rotary connector shown in the drawing, 1 is the casing of the connector 2 - fiber fiber optic cable, 3 - spherical surface of the end faces of optical fibers, 4 - optical tips, 5 - ball bearings, 6 spacer ring, 7 - springs, 8 - nut, 9 - shims under the springs 10 to the flange of the optical tip.

Unified fiber optic rotary connector trail running is accordingly. Because of the symmetry of the execution of the connector can transmit data in two directions without affecting its quality. The connector allows a rotation of any of the optic handpiece with fixed therein fibers. When the rotation is stored mechanical contact between the ends of the tips produced by the springs.

In the best execution of the body of the connector has been made in the form of a cylinder of stainless steel HNT with an inner diameter of 7 mm hull contains 4 bearings, each of which has an external diameter of 7 mm and an inner diameter of 2.5 mm, an Inside bearing installed by dense planting optical tips Zirconia ceramic. In case there are springs that provide the contact lugs between themselves and the elimination of lateral run-out on the raceways of the inner and outer bearing rings. Spring in the housing are fixed coupling nuts through the Teflon strip. The ends of the spliced fiber is made in the form of a recessed spherical surface that eliminates friction between the fiber end faces during operation.

The proposed unified fiber optic rotary connector is used in a real fiber-optic communication lines.

Sources of information

1. US No. 4641915, G02B 6/32.

2. US No. 5039193, G02B 6/32, G02B 6/26.

3. MBA the Fiber optics and instrumentation", 1983

4. RU # 2245968.

1. Fiber optic rotary connector comprising a housing that holds the first and second optic fibers, the first fiber, the fiber is fixed in the first optical tip, which is fixed in bearings for rotation between bearings is the spacer ring and the second optic fiber attached similar to the first, both the optical tip is pressed toward each other by springs and coupling nuts associated with the housing, characterized in that the offset between the optical axes of optical fibers is determined by the expression:

where x is the offset between the axes of the joined fibers, ám, α is the radius of the fibre, µm, Pand- power on the transmitting end of the fiber, Rp- power on the receiving end of the fiber, z is the distance between the ends of spliced optical fibers, NA is the numerical aperture of the fibre, r=α+z·tgα - radius distribution of the radiation field in a plane coincident with the plane of the end face of the receiving fiber, sinα=NA, the offset x is the limit of the radial runout of the inner ring of the rolling bearing.

2. Fiber optic rotary connector according to claim 1, characterized in that the springs are placed between the coupling nuts and what nutranite rings, moreover, the inner rings of the bearings associated with the springs through the flange of the optical tip.

3. Fiber optic rotary connector according to claim 1, characterized in that the end faces of optical fibers have a spherical surface and is made recessed relative to the plane of the end face of the optical tip.

4. Fiber optic rotary connector according to claim 1, characterized in that the design of the connector is symmetrical in nature.



 

Same patents:

FIELD: physics.

SUBSTANCE: optical connector for terminating optical fibre has a housing with a socket inside. The socket has an optical fibre termination section on its right side. The optical fibre termination section includes a first optical fibre having a first end and a second end. The socket also has in its second part a mechanical splice made with possibility of splicing the second end of the optical fibre termination section with a second optical fibre. The socket has a buffer clamp made in its third part with possibility of pressing at least the buffer cladding section of the second fibre when the clamp is actuated. The optical fibre distribution point has a tray made with possibility of detachable connection to the optical fibre distribution socket. The tray has a front surface made with possibility of accommodating several connectors. Each connector is made with possibility of fitting an optical socket in it, which forms the end termination of the optical fibre from the distribution line. The device for terminating the optical fibre has a base made with possibility of holding the optical socket, a first actuating mechanism mounted on the base for actuating the splice of the optical socket and a second actuating mechanism for actuating buffer clamp of the optical socket, as well as an optical fibre holder. The method of terminating optical fibre into an optical socket involves processing the end of the optical fibre, putting the processed end of the optical fibre into a pre-assembled optical socket, actuation of the splice, splicing the processed end of the optical fibre with a second end of the termination section of the optical fibre, pressing the buffer section of the optical fibre in the optical socket and freeing the optical fibre.

EFFECT: design of an optical fibre connector which enables fast connection and joining several pairs of optical fibres and is simple and cheap to assemble and use.

10 cl, 35 dwg

FIELD: physics, communication.

SUBSTANCE: invention is related to the field of instrument making and may be used for fixation of fibre-optic elements of communication lines. In order to achieve this result, device comprises panel. Alternating transverse rows of fixed rigid columns and transverse rows of flexible columns are installed on upper side of panel. Rigid and flexible columns are installed in groups, each of which comprises at least one row of rigid columns and one row of flexible columns. On panel, at least on one end side of passage, there is at least one junction fixator. Height of each passage is more or equal to at least heights of two junctions laid one above another in a tier.

EFFECT: improved reliability of device operation and its service life.

4 dwg

FIELD: physics.

SUBSTANCE: proposed device includes the casing with a jointing element to be received into the jointing assembly, fluid medium proportioning tool arranged, partially, inside aforesaid casing. Note here that the said proportioning tool section interacts with the face surface when the aforesaid jointing element is received by the jointing assembly. The said fluid medium proportioning tool is designed to feed fluid medium and solvent onto the said face surface to removal dirt from the said face surface. The proposed device can include a contact clearing assembly and/or a microscope.

EFFECT: device for clearing optical fiber end face by no-contact method, removal of cleaning liquid from face surface.

78 cl, 21 dwg

FIELD: electronics, optics.

SUBSTANCE: optical connection module for connecting an optical component to substrate contains substrate; auxiliary support, connected to aforementioned substrate, containing heat-isolating material; optical component, adjusted relatively to the first laser and soldered to aforementioned auxiliary support with usage of heat from the second laser; contact area, located between aforementioned heat-isolating material and aforementioned optical component; laser auxiliary support, connected to aforementioned substrate; and a first laser, connected to aforementioned laser auxiliary support. Optical component is an optical fiber, while aforementioned optical connection module is a module for connecting the first laser to the optical fiber. Aforementioned contact area and aforementioned heat-isolating material ensure local transfer of heat during soldering for even melting of solder alloy and for limiting transfer of heat into aforementioned substrate. Aforementioned optical component is picked from a group which includes optical fiber, mirrors, lenses, detectors, micro-electro-mechanical devices and isolators. Method for manufacturing an integration optical connection module includes creating a substrate, applying a pattern and etching first zone of aforementioned substrate, creating a heat-isolating material in aforementioned first zone of aforementioned substrate, polishing aforementioned heat-isolating material and aforementioned substrate for creation of a flat surface, including a part of substrate and the heat-isolating part, connection of contact area, including at least one metallic layer, to aforementioned heat-isolating part, positioning of first laser on aforementioned part of substrate and adjustment and connection of optical component to aforementioned contact area. Aforementioned optical component is connected to aforementioned contact area with usage of solder alloy, which is heated using the second laser.

EFFECT: increased efficiency, ensured operation of high power laser.

2 cl, 11 dwg

Universal adaptor // 2288492

FIELD: mechanical engineering.

SUBSTANCE: connector of adaptor for fiber-optic plug is mounted ahead onto front panel and is fixed by means of spring. Adaptor has case made of one or two items, at least one flange which is pressed against front panel, at least one socket for fiber-optic plug, which socket is disposed ahead and/or behind of front panel, and at least one dismountable fixing unit for plug. Any socket of plug has hole intended for selective mounting of at least two of three different types of plugs LX.5, LC and MU and of one corresponding fixing unit, which is used for plug of corresponding type.

EFFECT: higher universality; improved efficiency of operation.

12 cl, 6 dwg

FIELD: fiber-optic connectors.

SUBSTANCE: method includes steps, at which metal is precipitated by galvanic plastics on at least one wire element to produce a product in form of rod and wire element is pulled or extruded from product without using dissolution or heating, causing worsening of characteristics of wire element, diameter of which is insignificantly greater, than diameter of optic fiber. Precision of diameter of through aperture of headpiece is determined by precision of outer diameter of wire element.

EFFECT: lower costs, higher precision.

3 cl, 20 dwg

FIELD: subsurface laying and wiring of fiber bundles in plastic pipes using pneumatic method.

SUBSTANCE: each section of fiber bundle disposed beyond pipeline is placed in plastic pipe whose outer diameter is smaller than that of pipeline, the latter is tightly joined through adapter to plastic pipe, plastic pipes are tightly joined with pipe connections of dead-end box made in sealed cast-iron protective casing, and fiber bundles are connected within this box. Plastic pipes holding fiber bundles are coiled in turns at permissible bending radius so as to ensure that dead-end box occurs inside one coil formed at the same time from turns of two plastic pipes or between two coils, each being formed from turns of one plastic pipe. Butt-ends of pipelines, plastic pipes holding fiber bundles, and dead-end box are placed in fiberglass shell tied to pipelines to protect them from rodents.

EFFECT: enhanced reliability and service life of fiber-optic lines using light-mass fiber bundles laid in subsurface plastic pipes.

3 cl, 4 dwg

FIELD: fiber-optic information transfer systems.

SUBSTANCE: device has body 1, on one wall of which socket 2 with localizer 3 is mounted, in which optical end piece 4 is placed with fiber light guide 5, fixed on bushing 6. On other wall of body 1 screw pair is mounted, crew 8 of which is connected to bushing 6 via flexible link 9, passing inside body 1 through guiding apertures 10, 11. In body 1 adjusting screw 12 is mounted with possible transverse effect on flexible link 9. Compression spring 7 is connected to bushing 6 and body 1 and provides for constant tension of flexible link 9. Flexible link 9 is deformed by rotation of screw 12. End of flexible link, connected to bushing 6, extends from guide 11, pulling optical end piece 4.

EFFECT: higher precision.

6 cl, 3 dwg

The invention relates to optical means of the study of the internal structure of objects and can be used in the OTDR, devices for coherent imaging devices for obtaining spectral images used in medical diagnosis and monitoring of technological processes

The invention relates to fiber-optic technology

FIELD: physics.

SUBSTANCE: fibre-optic connector has first and second half couplings for sealing first and second sections of optical fibre on whose butt ends there are first and second pairs of step-up and step-down optical multi-layer transformers. There is an air gap between the outer layers of the first and second pairs of optical multi-layer transformers. Layers of the first and second pairs of optical multi-layer transformers are made from materials with different refraction indices and are measured from outer layers of step-down transformers of the first and second pairs of optical multi-layer transformers adjacent to the air gap towards the butt ends joined to optical fibre sections. Thickness of each layer is equal to a quarter of the medium wave Xo of the signal transmitted over the optical fibre and the number of layers is selected based on conditions given in the formula of invention.

EFFECT: lower level of power loss arising due to insufficiently close contact or welded joint at the position of the joint and wider range of apparatus for this purpose.

4 cl, 7 dwg

FIELD: physics.

SUBSTANCE: fibro-optical connector comprises first and second half-couplings to receive first and second sections of optical fiber. First and second pairs of step-down optical multilayer transformers are arranged on end faces of said sections. Air gap is arranged between outer layers of said first and second pairs of said transformers. Layers of first and second pairs of aforesaid transformers are made from materials with differing indices of reflection and are counted from outer layers of aforesaid transformers in direction of the end faces of connected sections of optical fiber. Thickness of every layer makes one fourth of average signal wave λ0 transmitted over optical fiber, while the number of layers is selected subject to conditions covered by invention claim.

EFFECT: reduced power loss, expanded performances.

4 cl, 9 dwg

FIELD: physics; optics.

SUBSTANCE: invention relates to devices for splitting optical fibres, specifically to manual portable instruments. The mechanism for breaking optical fibres contains apparatus for breaking fibres and one or more clamping elements which can clamp an optical fibre at one end, which should be cut off, and apply a pulling force so as to stretch the fibre when breaking it. The mechanism is designed such that, the clamping element(s) can also push the broken part of the fibre using devices which enable the clamping element(s) to continue applying a pulling force to the cut off part of the fibre after breaking. The clamping element or each clamping element releases the cut off part when moving the cut off part of the fibre.

EFFECT: high quality joining and reliability of fibres.

11 cl, 15 dwg

FIELD: electrical engineering .

SUBSTANCE: device for introduction of laser emission in fibre, which contains optical single-mode or multimode fibres equipped with microlenses that are shaped of transparent materials, differs because microlenses are made of optical glass, refractive exponent of which is higher than the refractive exponent of light conducting thread of fibre, in the shape of sphere that embraces light conducting thread at the end of fibre, and the end surface of fibre is made in the form of polished cylindrical surface, besides, axis of cylindrical surface intersects with fibre axis and is perpendicular to fibre axis.

EFFECT: increases coefficient of emission introduction and reduces dependency of introduction coefficient on misalignment.

5 cl, 5 dwg

FIELD: the invention refers to the mode of manufacturing lens in the shape of peaks on the end-faces of single-mode and multi-mode optical fibers.

SUBSTANCE: the manufacturing mode is in plotting drops of polymerized substance on the end-face plane of the fiber, radiation of the plotted drop with a source of light for realization light photo polymerization. At that before exposure they choose one or several desired modes subjecting the optical fiber to mechanical strains, at the stages of plotting the drop and radiation they execute control and management of the form and the sizes of the peak, before the radiation stage they hold out the mixture at the given temperature for achieving viscosity of the mixture which allows to get the needed height of the drop, regulate duration of exposure and/or intensity of the light for regulating the end radius of the curvature of the peak.

EFFECT: provides possibility to get peaks of different heights and different radiuses on the end-face planes of the optical fibers and also provides possibility to control the indicated parameters of the peaks in time of their manufacturing.

26 cl, 13 dwg

Optical element // 2213987
The invention relates to optoelectronics and can be used in the processing of optical information from the optical fiber measuring networks

Optical isolator // 2204155

Beam expander // 2183337
The invention relates to integrated optics and can be used as an extender optical beam propagating in the optical waveguide, collimating or selectivity of the element in different integrated-optical elements and circuits, with the creation of tunable filters for frequency seals signals in fiber-optic communication systems

The invention relates to passive components, fiber optic equipment, and specifically to devices of input optical radiation into the fiber light guide

The invention relates to an optical instrument, in particular to the class of optical converters

FIELD: the invention refers to the mode of manufacturing lens in the shape of peaks on the end-faces of single-mode and multi-mode optical fibers.

SUBSTANCE: the manufacturing mode is in plotting drops of polymerized substance on the end-face plane of the fiber, radiation of the plotted drop with a source of light for realization light photo polymerization. At that before exposure they choose one or several desired modes subjecting the optical fiber to mechanical strains, at the stages of plotting the drop and radiation they execute control and management of the form and the sizes of the peak, before the radiation stage they hold out the mixture at the given temperature for achieving viscosity of the mixture which allows to get the needed height of the drop, regulate duration of exposure and/or intensity of the light for regulating the end radius of the curvature of the peak.

EFFECT: provides possibility to get peaks of different heights and different radiuses on the end-face planes of the optical fibers and also provides possibility to control the indicated parameters of the peaks in time of their manufacturing.

26 cl, 13 dwg

Up!