CN87216477U

CN87216477U - Optical fiber coupler

Info

Publication number: CN87216477U
Application number: CN 87216477
Authority: CN
Inventors: 卢文全; 金武俊
Original assignee: Guilin Civil Administration Fiber Optic Components Factory; NO 34 INST MINISTRY OF ELECTRONIC INDUSTRY
Current assignee: Guilin Civil Administration Fiber Optic Components Factory; NO 34 INST MINISTRY OF ELECTRONIC INDUSTRY
Priority date: 1987-12-17
Filing date: 1987-12-17
Publication date: 1988-08-03

Abstract

The utility model relates to an optical fiber coupler, composed of a coupling head, an optical cable and an output head. A plug pin body inside the coupling head adopts an optical fiber with a thin core diameter, the end surface of the plug pin body is arranged on the focus of the plane-convex lens, and the side surface of the plug head is provided with a positioning pin and a conical surface which are matched with the key groove and the conical hole of the plug socket. The inner screw threads of the front end of the tail cap of the output head can be exchanged with a pen holder type, a sealing head glass tube type and a magneto-optical curing type output head, and the pen holder of the magneto-optical curing type output head is provided with a magnetic head. The coupling head can also be combined with the optical cable whose one end is provided with a silver pin and an optical fiber connector. The coupler has good plugging and pulling repeatability, high coupling efficiency, stability and reliability, good flexibility of the optical fiber and long service life, being provided with various treatment heads and optical fiber connectors.

Description

Optical fiber coupler

The utility model relates to a kind of fiber coupler.Be applicable to the laser medicine instrument and as the parts of Optical Fiber Transmission.

In laser, fiberoptic application technology, all will be light coupled into optical fibres effectively, and export by needed mode.This type of fiber coupler of seeing at present has following shortcoming: on coupling scheme, and the one, regulate light source, lens, optical fiber three relative position with micropositioning stage, realize the coupling of optical fiber and light source; Make skewer spare form and light source coupling with large core fiber or fibre bundle besides.The former poor stability that is coupled needs often to regulate; The latter loses the flexible good feature of optical fiber, the optical fiber frangibility, and the power density of fiber-optic output face is low, and skewer is dialled poor repeatability.Their way of output is all very single, and range of application is narrow.

Task of the present utility model be to the public provide that a kind of skewer dials that good reproducibility, coupling are stable, optical fiber flexible good, have a fiber coupler that multiple mode is exported.

Structure of the present utility model and details provide from description of drawings and embodiment:

Description of drawings:

Fig. 1 fiber coupler diagrammatic cross-section

Fig. 2 coupling head sectional view

Fig. 3 out splice going splice sectional view

Pen type delivery on Fig. 4 fiber coupler

Magneto-optic on Fig. 5 fiber coupler is treated the formula delivery

The sectional view of Fig. 6 magnetic head A-A direction

End socket glass tubular type delivery on Fig. 7 fiber coupler

Acupuncture needle hair style delivery on Fig. 8 fiber coupler

Joints of optical fibre delivery on Fig. 9 fiber coupler

The utility model is made of coupling head 1, optical cable 2, out splice going splice 3 three parts.

Coupling head 1 is made up of skewer needle body 4, plano-convex lens 5, skewer head 6, coupling nut 7, tail cap 8, skewer seat 9.The formation of skewer needle body 4 is: diameter 1.8～2mm, length are the stainless-steel tube 10 of 20～25mm, and it is that 1.5～1.7mm, length are the glass capillary 11 of 10～15mm that the front end endoporus has external diameter, and skewer is gone into optical fiber 12 in the kapillary 11.Optical fiber 12 is all used epoxy resin 20 cementations with glass capillary 11, glass capillary 11 with stainless-steel tube 10, and rubbing down light outer face.The optical fiber 12 and the stainless-steel tube 10 that come out from skewer needle body 4 rear ends penetrate the plastic casing 13.Plano-convex lens 5 is placed cementation in the skewer head 6, and the fiber end face that rubbing down in the skewer needle body 4 is crossed places on the focus of plano-convex lens 5, with epoxy resin 20 sealing, makes optical fiber 12, plano-convex lens 5 and skewer head 6 constitute one.The size of skewer head 6 endoporus matches with plano-convex lens 5 external diameters, and the endoporus front end has a step 14 to deviate to prevent plano-convex lens 5.There is a step 15 at skewer head 6 appearances 2/3 place, and preceding 1/3 long is the garden cylindricality, and last riveting has a register pin 16, and the stage casing is the garden conical surface 54, step 15 rear end cars one section screw thread 17.Coupling nut 7 is enclosed within skewer head 6 afterbodys.In the middle of the coupling nut 7 be through hole, after an interior step 18 is arranged, preceding have an internal thread 19, interior step 18 contacts with the step 15 of skewer head 6.In the tail cap 8 is through hole, and preceding have an internal thread 21, after interior spiral shell 22 is arranged, tail cap 8 internal threads 21 are connected with the screw thread 17 of skewer head 6.Steel wire sheath 23 in the optical cable 2 is screwed in tail cap 8 internal threads 22, and plastic casing 24 is inserted in tail cap 8 small ends.

Above-mentioned skewer head 6 skewers are gone in the skewer seat 9, skewer seat 9 central authorities are through hole, for the skewer that guarantees skewer head 6 is dialled repeatability, the garden conical surface 54 of skewer head 6 and register pin 16 cooperate with skewer seat internal taper hole 46 and keyway 45, the ring flange 48 of 2～4 fixed orifices 47 is arranged at skewer seat 9 bottoms, is convenient to skewer seat 9 is fixed on the laser tube support.Skewer seat 9 other ends are boss 49, on external thread 50 is arranged, can connect with the internal thread 19 that is connected tail cap 7, realize that the skewer head 6 and the skewer dial sleeve of skewer seat 9 connect.

Described optical cable 2 is a single fiber cable, and interior is the optical fiber 12 of single mode to 300 μ m core diameter, penetrates plastic casing 13, and plastic casing 13 penetrates steel wire sheath 23, and steel wire sheath 23 penetrates plastic casing 24.

Described delivery 3 is made up of tail cap 25, skewer needle body 26, optical cable 2.Tail cap 25 central authorities are through hole, and back segment trailer has a step 27.One section internal thread 28 is arranged before the tail cap 25, after interior spiral shell 29 is arranged.Internal thread 29 is connected with steel wire sheath 23 on the optical cable 2, step 27 and plastic casing 24 sockets.Skewer needle body 26 is identical with the structure of skewer needle body 4, and only stainless-steel tube length is 70～150mm.

For enlarging range of application, output of the present utility model has multiple mode.Can be respectively be connected with reducing sleeve 38 on the end socket glass tube 33 through the internal thread 28 of out splice going splice 3 with the external thread 37 of penholder 30, also can be connected with the external thread 32 of magnetic head 31, form pen type delivery, end socket glass tubular type delivery and magneto-optic and treat the formula delivery to adapt to different treatment needs by the internal thread 34 of penholder 30.In the middle of the penholder 30 is through hole, is convenient to skewer needle body 26 and passes, and penholder 30 front end cars have internal thread 34, is connected with external thread 36 on the through hole taper cap 35.Penholder 30 tail ends have external thread 37, are connected with internal thread 28 on the tail cap 25 promptly to constitute the pen type delivery.As take off taper cap 35, load onto magnetic head 31 and promptly constitute magneto-optic treatment formula delivery.Permanent magnet 51 in the described magnetic head 31 is the Cylinder of two bow-shaped cross-sections, and the centre separates with centering piece, makes the magnetic line of force of two permanent magnets 51 pass therapentic part.Take off penholder 30 from tail cap 25, load onto reducing sleeve 38, reducing sleeve 38 front ends are conical through-hole 39, the rear end car has external thread 40, external thread 40 on the reducing sleeve 38 is worn into the end socket glass tube tail end 41 skewers of taper again and is gone into promptly to constitute in the taper hole 39 end socket glass tubular type delivery with after internal thread 28 on the tail cap 25 is connected.

The coupling head 1 of this fiber coupler also has two kinds of way of outputs:

One, the joints of optical fibre of coupling head 1 and the 34 research institute of ministry of electronics industry production constitute the parts of Optical Fiber Transmission.

Two, coupling head 1 combines with being penetrated hollow acupuncture needle head 42 by optical fiber 12 and be with the single fiber cable 43 that plastic casing 13 forms, and has constituted acupuncture needle hair style delivery.Described acupuncture needle head is that optical fiber 12 penetrates hollow acupuncture needle 42, and with epoxy resin 20 cementations and rubbing down optical fiber 12 front end faces, the rear portion of pin is with tubular metal or plastic fastening 44 and plastic casing 13 cementations.

Advantage of the present utility model: skewer head 6, planoconvex spotlight 5 are bonded as one with optical fiber 12, skewer seat 9 is fixed on the light source bracket, plug skewer head 6 and screw, when adjusting light source and making optically-coupled advance optical fiber to reach optimum value behind the fixed light source, skewer head 6 repeatedly skewer is dialled, can guarantee high repeatability and stable, and this coupler coupling efficiency height, easy to use. Owing to selected the optical fiber of single mode to 300 μ m core diameter, add the protection of steel wire sheath and plastic bushing, the flexible good feature of optical fiber is not fully exerted, improved the life-span of optical fiber in frequent operation uses. Out splice going splice 3 has adopted the structure that can be combined with multiple treatment head and the joints of optical fibre, has realized multi-use. End socket glass pipe type delivery can go deep into the inner chamber irradiation treatments such as human body ear, nose, larynx, anus and gynaecology, can the one sick pipe of end socket glass tube is reused after changing sterilization, has solved the problem that long-term phototherapy apparatus can not high-temperature sterilization.

Claims

1, a kind of fiber coupler is made up of coupling head 1, optical cable 2 and out splice going splice 3.Skewer head 6 skewers in the coupling head 1 are gone in the skewer seat 9, put coupling nut 7, in skewer head 6, pack into plano-convex lens 5 and optical fiber 12, and the tail cap 8 of screwing on has plastic casing 13, steel wire sheath 23 and plastic casing 24 outside the optical fiber 12 in the optical cable 2 successively, it is characterized in that:

A, coupling head 1, optical cable 2 and out splice going splice 3 constitute one,

Optical fiber 12 end faces that rubbing downs are crossed in the B, skewer needle body 4 place on the focus of plano-convex lens 5 with epoxy resin 20 sealing,

C, dial repeatability for the skewer that guarantees skewer head 6, the garden conical surface 54 of skewer head 6 and register pin 16 cooperate with skewer seat internal taper hole 46 and keyway 45,

In D, the single fiber cable is the optical fiber 12 of single mode to 300 μ m core diameter,

Have before the tail cap 25 of E, out splice going splice 3 one section with penholder 30 on screw thread 37 and end socket glass tube 33 on the internal thread 28 of the unified interface mode that matches of the screw thread 40 of reducing sleeve 38.

2, fiber coupler according to claim 1 is characterized in that: the length of skewer needle body 26 stainless-steel tubes is 20～150mm.

3, according to claim 1,2 described fiber couplers, it is characterized in that: the internal thread 34 of penholder 30 front ends combines with magnetic head 31.

4, fiber coupler according to claim 1 is characterized in that coupling head 1 can combine with the joints of optical fibre.

5, fiber coupler according to claim 1, but it is characterized in that the optical cable 2 of coupling head 1 connecting band acupuncture needle head 42.

6, fiber coupler according to claim 1 is characterized in that the end socket glass tube of using on the out splice going splice 3 33.

7, the magnetic structure in the fiber coupler according to claim 1 magnetic head 31 that it is characterized in that on the out splice going splice 3 adopting.