CN218585039U - Taper splitter with small bending radius - Google Patents

Abstract

The utility model relates to a little bend radius's tapering branching unit, including optic fibre, quartz substrate, protection tube and encapsulation pipe, optic fibre middle part forms optic fibre melting cone through the tapering, optic fibre includes G.657.A1 optic fibre section and G.657.B3 optic fibre section, G.657.A1 optic fibre section both ends with G.657.B3 optic fibre section butt fusion, G.657.A1 optic fibre section set up in optic fibre melting cone middle part. According to the small-bending-radius tapered splitter, the G.657.A1 optical fiber section is arranged in the middle melting area, the two ends of the G.657.A1 optical fiber section are welded with the G.657.B3 optical fiber section, the problem that the G.657.B3 optical fiber cannot be used for pulling the splitter is solved, and meanwhile, the G.657.B3 optical fiber section is the optical fiber extending out of the steel pipe, and the G.657.B3 optical fiber has a small minimum bending radius, so that the product has good bending performance, can be suitable for a narrower environment and is superior to other mini tapered splitters in the market at present.

Description

Taper splitter with small bending radius

Technical Field

The utility model relates to an optical transmission technical field, more specifically say, relate to a small bend radius's tapering branching unit.

Background

For transmission and practical application, optical fibers are sometimes drawn into a cone, and a fused-drawn-cone optical fiber coupling device is one of important basic devices in an optical fiber communication system, and can be used as a key component of various optical measuring instruments such as power splitters/combiners (splitters), wavelength Division Multiplexers (WDM) and fiber total reflectors (efms) in various proportions.

The fused biconical taper optical splitter bundles two or more optical fibers together, then fuses and stretches the optical fibers on a biconical taper machine, monitors the change of the splitting ratio in real time, finishes the fused and stretched optical fibers after the splitting ratio meets the requirement, and uses one end of each optical fiber (the rest of the optical fibers are cut off) as an input end and the other end of each optical fiber as a multi-path output end. The optical splitter can be made into any splitting ratio, so that the optical splitter has irreplaceable effect in application.

The length of the conventional tapering packaging steel pipe is generally 54mm and 50mm, as shown in fig. 1, the manufacturing process is relatively simple, the disadvantage is that the conventional tapering packaging steel pipe is applied to a narrower environment or a module box and cannot be placed in the narrower environment, or the optical fiber bending influences the loss greatly, while in order to adapt to the narrower environment, a Mini tapering is introduced, as shown in fig. 2, the length of the Mini tapering packaging steel pipe is generally 25mm and 30mm, the disadvantage is that although the length dimension is shortened, the optical fiber bending influence still exists, and in some particularly small environments, the application cannot be satisfied, for example: no fusion of the disc in 90 × 20 × 10mm ABS boxes; 44 × 25 × 6.2mm CCWDM products cannot be used as a monitoring end.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, a taper branching unit of little bend radius is provided.

The utility model provides a technical scheme that its technical problem adopted is:

the method comprises the steps of constructing a tapered splitter with a small bending radius, and the tapered splitter comprises optical fibers, a quartz substrate, a protection tube and a packaging tube, wherein an optical fiber fusion cone area is formed in the middle of the optical fibers through tapering, the optical fibers comprise a G.657.A1 optical fiber section and a G.657.B3 optical fiber section, two ends of the G.657.A1 optical fiber section are in fusion joint with the G.657.B3 optical fiber section, and the G.657.A1 optical fiber section is arranged in the middle of the optical fiber fusion cone area.

Preferably, the G.657.A1 optical fiber section is subjected to coating removal treatment before tapering.

Preferably, the length of the G.657.A1 optical fiber section before tapering is 10mm.

Preferably, the optical fiber melting cone region is arranged in the quartz substrate, two ends of the quartz substrate are packaged through first glue layers, two ends of the optical fiber extend out of two ends of the quartz substrate, and the first glue layers at the two ends fix the optical fiber.

Preferably, the quartz substrate is arranged in the protection tube, two ends of the protection tube are packaged through second glue layers, two ends of the optical fiber extend out of two ends of the protection tube, and the second glue layers are used for fixing the optical fiber.

Preferably, the protection tube is arranged in the packaging tube, two ends of the packaging tube are packaged through a third glue layer, two ends of the optical fiber extend out of two ends of the packaging tube, and the third glue layer is used for fixing the optical fiber.

Preferably, the first glue layer consists of 353ND glue and quartz powder.

Preferably, the second glue layer consists of JB542 glue.

Preferably, the protection tube is a glass tube.

Preferably, the packaging tube is a steel tube.

The beneficial effects of the utility model reside in that:

according to the small-bending-radius tapered splitter, the G.657.A1 optical fiber section is arranged in the middle melting area, the two ends of the G.657.A1 optical fiber section are welded with the G.657.B3 optical fiber section, the problem that the splitter cannot be drawn by the G.657.B3 optical fiber is solved, and meanwhile, because the optical fiber extending out of the steel pipe is the G.657.B3 optical fiber section, the G.657.B3 optical fiber has a small minimum bending radius, the product has good bending performance, can be suitable for a narrower environment, and is superior to other mini tapered splitters in the market at present.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive efforts according to the drawings:

fig. 1 is a schematic diagram of a conventional tapered packaging steel pipe in the background art of the present invention.

Fig. 2 is a schematic diagram of a Mini tapered packaged steel pipe in the background art of the present invention.

Fig. 3 is a schematic view of the overall structure of the preferred embodiment of the present invention.

FIG. 4 is a schematic diagram of the optical fiber melting cone according to the preferred embodiment of the present invention.

Wherein: 1-packaging tube, 2-protecting tube, 3-quartz substrate, 4-first glue layer, 5-second glue layer, 6-third glue layer, 7-optical fiber, 8-G.657.A1 optical fiber section and 9-G.657.B3 optical fiber section.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, a clear and complete description will be given below with reference to the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, belong to the protection scope of the present invention.

The utility model discloses what preferred embodiment was shown in fig. 3-4, including a little bend radius's tapering branching unit, including optic fibre 7, quartz substrate 3, protection tube 2 and encapsulation pipe 1, optic fibre 7 middle part forms optic fibre fused cone area through the tapering, optic fibre 7 includes G.657.A1 optic fibre section 8 and G.657.B3 optic fibre section 9, G.657.A1 optic fibre section 8 both ends with G.657.B3 optic fibre section 9 butt fusion, G.657.A1 optic fibre section 8 set up in optic fibre fused cone area middle part.

And the G.657.A1 optical fiber section 8 is subjected to coating layer removal treatment before tapering. The length of the G.657.A1 optical fiber section 8 before tapering is 10mm. The expansion coefficient of the coating material and other components is large, and when the temperature is reduced, the shrinkage is serious, so when the temperature is changed, the expansion coefficient of the material is different, and the optical fiber is slightly bent, particularly in a low-temperature region.

The optical fiber melting cone region is arranged in the quartz substrate 3, two ends of the quartz substrate 3 are packaged through the first glue layers 4, two ends of the optical fiber 7 extend out of two ends of the quartz substrate 3, and the first glue layers 4 at two ends fix the optical fiber 7. The quartz substrate 3 is arranged in the protection tube 2, two ends of the protection tube 2 are packaged through the second glue layers 5, two ends of the optical fiber 7 extend out of two ends of the protection tube 2, and the second glue layers 5 are used for fixing the optical fiber 7. The protection tube 2 is arranged in the packaging tube 1, two ends of the packaging tube 1 are packaged through third glue layers 6, two ends of the optical fibers 7 extend out of two ends of the packaging tube 1, and the third glue layers at the two ends fix the optical fibers 7.

The first glue layer 4 consists of 353ND glue and quartz powder. The second glue layer 5 consists of JB542 glue. The third glue layer 6 is made of Dow Corning 184 glue.

The protection tube 2 is a glass tube, a transparent quartz tube can be selected, and the size is preferably OD2.2xID1.5xL25mm. The packaging pipe 1 is a steel pipe, a stainless steel pipe can be selected, and the size is preferably OD3xID2.7xL30mm. The quartz substrate size is preferably L1.38xW0.6xL20mm. The packaging tube 1 adopts metal sealing, is different from colloid sealing in the traditional packaging, can bear larger pressure and shock resistance,

the optical fiber used in the tapering was a G.657.A1 optical fiber having a minimum bend radius of 10mm. G.657.A2 optical fiber has a minimum bend radius of 7.5mm, and G.657.B3 optical fiber has a minimum bend radius of 5mm. And the G.657.A2 and G.657.B3 optical fibers have smaller minimum bending radius but cannot be subjected to tapering production. Among them, the G.657.A1 fiber and the G.657.B3 fiber have more performance coefficients according to ITU-T New G.657 standard and G.657.B3 fiber.

The small bending radius tapered splitter solves the problems that the G.657.B3 optical fiber cannot produce a tapered fiber and the splitter cannot be drawn by arranging the G.657.A1 optical fiber section in the middle melting area and welding the two ends of the G.657.A1 optical fiber section with the G.657.B3 optical fiber section, and simultaneously, because the optical fiber extending out of the steel pipe is the G.657.B3 optical fiber section, the G.657.B3 optical fiber has a small minimum bending radius, the product has better bending performance, can be suitable for narrower environments and is superior to other mini tapered splitters in the market at present,

the manufacturing steps of the preferred embodiment are as follows:

1. the fibers were first fusion spliced as shown in fig. 4, in which the g.657.A1 fiber was completely uncoated and had a length of 10mm.

2. And drawing the welded optical fiber 7 on a tapering machine to form the splitter.

3. The drawn optical fiber 7 is put into the quartz substrate 3, and a first glue layer 4 is formed at both ends with a glue length of 3mm, and is fixed.

4. And (3) putting the product with the sealed quartz substrate 3 into a glass tube, and forming a second glue layer 5 by glue with the length of 3mm at two end points for fixing.

5. And placing the glass tube device into the steel tube, pouring glue to form a third glue layer 6, and fixing.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.

Claims (10)

1. The small-bending-radius tapered splitter comprises optical fibers, a quartz substrate, a protection tube and a packaging tube, wherein an optical fiber fused taper region is formed in the middle of each optical fiber through tapering, and the small-bending-radius tapered splitter is characterized in that each optical fiber comprises a G.657.A1 optical fiber section and a G.657.B3 optical fiber section, two ends of each G.657.A1 optical fiber section are in fusion joint with the G.657.B3 optical fiber section, and the G.657.A1 optical fiber sections are arranged in the middle of the optical fiber fused taper region.

2. The tapered splitter with small bend radius of claim 1, wherein the g.657.a1 fiber segment is de-coated before being tapered.

3. The tapered splitter with small bend radius of claim 1, wherein the pre-tapered length of the G.657.A1 fiber section is 10mm.

4. The tapered splitter with small bending radius according to any of claims 1-3, wherein the fiber fused taper region is disposed in the quartz substrate, both ends of the quartz substrate are encapsulated by a first glue layer, both ends of the optical fiber extend out of both ends of the quartz substrate, and both ends of the first glue layer fix the optical fiber.

5. The tapered splitter with small bending radius of claim 4, wherein the quartz substrate is disposed inside the protection tube, two ends of the protection tube are encapsulated by a second glue layer, two ends of the optical fiber extend out of two ends of the protection tube, and the second glue layer fixes the optical fiber.

6. The tapered splitter with small bending radius according to claim 5, wherein the protective tube is disposed inside the package tube, two ends of the package tube are encapsulated by a third glue layer, two ends of the optical fiber extend out of two ends of the package tube, and the third glue layer fixes the optical fiber.

7. The tapered splitter with small bending radius of claim 4, wherein the first glue layer is composed of 353ND glue and quartz powder.

8. The tapered splitter with small bend radius of claim 5, wherein the second glue layer is composed of JB542 glue.

9. The tapered splitter with small bending radius of claim 4, wherein the protective tube is a glass tube.

10. The small bend radius tapered shunt of claim 5, wherein said enclosure tube is a steel tube.

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