CN2630875Y

CN2630875Y - 1 to n conical optical fiber connector

Info

Publication number: CN2630875Y
Application number: CNU032558953U
Authority: CN
Inventors: 祝生祥; 薛春荣; 蔡小明; 傅玉喜
Original assignee: Tongji University
Current assignee: Tongji University
Priority date: 2003-07-24
Filing date: 2003-07-24
Publication date: 2004-08-04
Anticipated expiration: 2013-07-24

Abstract

The utility model pertains to the optical fiber technique field, in particular to a one-to-n cone optical fiber (coupling/beam splitting/ beam combining) connector. The utility model comprises an optical fiber fixture, an optical fiber supporter, a connective fixture component and a connector out case. The optical fiber supporter comprises a base frustum and a cone. N grooves to inosculate the receiving optical fibers are opened in the cone surface of the optical fiber supporter and the corresponding N small holes are opened in the corresponding positions of the frustum to penetrate the receiving optical fibers. The optical fiber fixture is installed in the cone surface central hole in the connective out case to be used to fix the emitting optical fibers. The utility model not only can be used as the connective component in the communication system optical fiber network, as the beam splitter, but also can be used as the beam combiner to acquire the high power strong beam in the laser components. In the application of the integrated optical device, the utility model can realize the light signal connections in arbitrary three dimensional directions between the integrated components. The utility model is simple in structure, high in efficiency and can reduce the cost of the manufacture and operation greatly.

Description

The conical fiber connector of 1 couple of n

Technical field

The utility model belongs to the optical fiber technology field, is specifically related to conical fiber (coupling/beam splitting/the close bundle) connector of a kind of 1 couple of n.

Background technology

The joints of optical fibre are to use maximum optical passive components in the fiber optic network. studying novel connector is one of method that reduces the fiber optic network cost.Current all joints of optical fibre all are the corresponding optical fiber of an optical fiber, export corresponding access for one, lack the joints of optical fibre of one-to-many.If can make a pair of two, a pair of three in addition one-to-many just can reduce the cost and the complicacy of a fibre-optic transmission system (FOTS) greatly.

The connector that generally adopts on the current market has:

The end face of two optical fiber contact pins that (1) FC connector connected is plane butt joints, and the air air gap can produce Fresnel reflection between end face, causes the increase of extra noise, waveform distortion and insertion loss easily.

(2) ST type (bayonet type) and SC type (plug-in) are developed at the shortcoming that solves FC connector.SC connector adopts novel direct insertion coupling device, and the end surface grinding of its contact pin becomes protruding sphere, and when fiber alignment, the air air gap between end face is littler than plane, the coupling efficiency height, and the insertion loss is only little, and reflection loss is big.They are man-to-man.

Above-mentioned two kinds of connectors are flexible jumper, optical fiber is penetrated and be fixed in the contact pin, and after the contact pin surface carried out polishing, realize aiming in tube coupling.The outer assembly of contact pin adopts metal or nonmetallic material.Milled processed must be carried out in the butt end of contact pin, and the other end adopts crooked limiting member to support optical fiber or optical fiber flexible-cable to discharge stress usually.Tube coupling generally is to be made by two semi-synthetic, the fastening circle tube members that pottery or material such as bronze are made, and polygamy has the ring flange of metal or plastics, so that the installing and fixing of connector.For accurately aim at optical fiber as far as possible, very high to the requirement on machining accuracy of contact pin and tube coupling.

(3) fixed connector of employing burning-on method, only realize a pair of two at present, and the covering that can occur optical fiber only when welding aims at and the out-of-alignment situation of fibre core, is connected to become bending shape between the fibre core after welding this moment or do not connect at all, causes splicing loss excessive.

Still the joints of optical fibre that do not have at present one-to-many.

Summary of the invention

The objective of the invention is to propose conical fiber (coupling/beam splitting/the close bundle) connector of a kind of 1 couple of n simple in structure, with low cost.

The conical fiber of the 1 couple of n that the utility model proposes (coupling/beam splitting/close bundle) connector, by connector overcoat 1, fiber clamp 2, structure of fiber_optic 3, be connected and fixed

member

4 and 5 and form (as shown in Figure 1), wherein, structure of fiber_optic 3 is formed (as shown in Figure 3) by concentric and the pedestal frustum 6 that fuses and cone 7, surface in the cone 7 of structure of fiber_optic has the groove (seeing shown in Figure 4) that the n bar is used for chimeric reception optical fiber, have the aperture of respective numbers n in the corresponding position of frustum 6, be used to run through reception optical fiber; The medial surface that connects overcoat 1 is and the taper of the lateral surface form fit of structure of fiber_optic 3, and the top end of its inner conical face has a center pit, and fiber clamp 2 is mounted in this center pit, and fiber clamp 2 is used for fixing launching fiber.The inner conical surface bottom that connects overcoat 1 is connected with the frustum bottom thread of structure of fiber_optic 3, is connected and fixed

part

4 and 5 and is individually fixed in the two ends that are connected overcoat 1.

In the utility model, the integer of the desirable 2-10 of n, it correspondingly, props up on the two-stage frustum that adds at optical fiber and to leave 2-10 bar groove and hole respectively corresponding to the beam splitting or the quantity of closing bundle optical fiber.The diameter of groove is 0.25 ± 0.05mm on the general frustum, and the diameter of cone mesopore is 1 ± 0.2mm.

In the utility model, accept in the groove that optical fiber is fixed in structure of fiber_optic, structure of fiber_optic is accepted pooling together of optical fiber 3 D stereo with many, and plays a supporting role.Be connected and fixed that member is accurate fixedly accepts the optical fiber extension, and play optical fiber and tension, the shock proof effect protected.

In the utility model, utilize the distinctive optical delivery character of conical fiber, make the conical fiber connector and just can realize that one-to-many optical fiber connects or beam splitting.Conical fiber is to utilize common single mode or multimode silica fibre, by computer control hot-stretch device, forms with molten daraf(reciprocal of farad) drawing.Utilize CO ₂Laser instrument or other heating arrangements make fiber fuse, impose pulling force at two ends it is broken rapidly, and section forms smooth flat naturally.

Utilize this device that optical fiber is carried out beam splitting or to close the process of bundle as follows:

The reception optical fiber of conical fiber is positioned on the conical surface of structure of fiber_optic in the groove, and pass the frustum aperture, fixing, structure of fiber_optic 2 screws in the connector overcoat 1, the launching fiber of conical fiber places in the fiber clamp 2, and fiber clamp 2 screws in the center pit of connector overcoat 1.When light passed through the optical fiber cone, guided modes was transformed into tunnelling ray and leaves optical fiber at cone tip part, propagates in the air.The taper position that is near its many other optical fiber just can receive the light signal that it sends, thus the purpose that reaches beam splitting or close bundle.

In the utility model, the connector of making can be removed from and uses contact pin and to the Precision Machining requirement of contact pin.Under active computer control batch process and the general accurate assembling, not only can realize the fixedly connected of one-to-many, and can realize the uniform distribution of luminous power.

The utility model not only can be applicable in the communication system fiber optic network can be used as the beam splitter of light signal as interface unit.Can be applied to again in the Laser Devices to obtaining the bundling device of big luminous power strong beam.Be applied in the development of integrated optical device, can easily realize the connection of the three-dimensional any direction of light signal between integrated component.Also can be widely used in Laser Devices or the integrated optical device.

The utility model is simple in structure, the efficient height, and can reduce greatly and produce and construction cost.

Description of drawings

Fig. 1 is a structural diagrams of the present utility model.

Fig. 2 is a pair of two optical fiber coupling/beam splitter synoptic diagram of the utility model.One is launching fiber among the figure, and two are reception optical fiber in addition.

Fig. 3 is the utility model structure of fiber_optic synoptic diagram.

Fig. 4 is the conical section structural diagrams of structure of fiber_optic.Wherein Fig. 4 (a) is the diagram of going to the bottom, and Fig. 4 (b) is the axial cross section diagram, and Fig. 4 (c) is the upper bottom surface diagram.

Number in the figure: 1 is the connector overcoat, and 2 is fiber clamp, and 3 is structure of fiber_optic, and 4 is fixed component, and 5 is fixed component, and 6 is the frustum of structure of fiber_optic, and 7 is the conical section of structure of fiber_optic.

Embodiment

Further specify the utility model below in conjunction with accompanying drawing.

Embodiment 1, whole connector is Φ 15 * 100mm, connector overcoat length is 80～100mm, adopt brass, structure of fiber_optic adopts aluminium alloy, cone bottom surface Φ 9.3 ± 0.005mm, cone upper bottom surface Φ 3 ± 0.005mm has 8 of the grooves of Φ 0.25 ± 0.005mm, high 20 ± the 0.1mm of cone, the frustum corresponding position has 8 of the apertures of Φ 1mm, the partly long 30 ± 0.1mm of frustum, wide 4 ± 0.1mm, fiber clamp is long to be 10mm, adopt aluminium alloy, be connected and fixed the long 10mm of being of member, adopt aluminium alloy or brass.Conical fiber is to utilize common single mode or multimode silica fibre, by homemade computer control hot-stretch device, forms with molten daraf(reciprocal of farad) drawing.Utilize CO ₂Laser instrument or other heating arrangements make fiber fuse, impose pulling force at two ends it is broken rapidly, and section forms smooth flat naturally.1 pair 8 optical fiber coupling/beam splitter is installed in 8 conical fibers that process in the optical fiber duct of support by processing structure of fiber_optic shown in Figure 3, and the position of optical fiber needs accurate the adjustment and sealing.Pack in the outer casing component of connector adjusting 8 good optical fiber of sealing and support thereof, fix, with the end fixed component of connector the extension of optical fiber is fixed and protected again with accurate thread.Simple optical fiber is installed in the fiber clamp, screws in the outer casing component of connector.The screw thread of the outer casing component of fiber clamp and connector needs Precision Machining.With the end fixed component of connector the extension of optical fiber is fixed and protected again.Above-mentioned parts are by certain processes and the conical fiber connector that promptly gets 1 pair 8 is installed.

Claims

1, the conical fiber connector of a kind of 1 couple of n, it is characterized in that by fiber clamp (2), structure of fiber_optic (3), be connected and fixed member (4), (5), connector overcoat (1) and form, wherein, structure of fiber_optic (3) is made up of concentric and the pedestal frustum (6) that fuses and cone (7), surface in the cone (7) of structure of fiber_optic has the groove that the n bar is used for chimeric reception optical fiber, have the aperture of respective numbers n in the corresponding position of frustum (6), be used to run through reception optical fiber; The medial surface that connects overcoat (1) is the taper with the lateral surface form fit of structure of fiber_optic (3), the top end of its inner conical face has a center pit, fiber clamp (2) is mounted in this center pit, fiber clamp (2) is used for fixing launching fiber, the inner conical surface bottom that connects overcoat (1) is connected with the frustum bottom thread of structure of fiber_optic (3), is connected and fixed part (4) and is individually fixed in the two ends that are connected overcoat (1) with (5).

2, conical fiber connector according to claim 1, it is characterized in that n is the integer of 2-10, corresponding to beam splitting or close the bundle optical fiber quantity, correspondingly, prop up on the two-stage frustum that adds at optical fiber and to leave 2-10 bar groove and hole respectively, the diameter of groove is 0.25 ± 0.05mm on the general frustum, and the diameter of cone mesopore is 1 ± 0.2mm.