CN211786219U - Optical fiber coupler structure - Google Patents

Abstract

The utility model discloses an optical fiber coupler structure, relating to the technical field of optical fiber couplers and comprising a hollow heat-shrinkable tube; the quartz seat body is provided with a containing groove, and the containing groove is provided with a coupling optical fiber; and the quartz cover body covers the accommodating groove, and the quartz cover body is matched with the quartz seat body and then placed in the heat shrinkage tube. The utility model discloses can effectively guarantee the product and under the condition that whole shell encapsulation size shortens, guarantee that the product has good parameter performance and high reliable and stable performance.

Description

Optical fiber coupler structure

Technical Field

The utility model relates to an optical fiber coupler technical field, in particular to optical fiber coupler structure.

Background

The optical fiber coupler is a transmission device used in an optical fiber communication network, has a function of redistributing optical power or optical wavelength of an input signal, and is widely applied to the fields of optical communication, EDFA, optical fiber gyroscopes and optical fiber hydrophones. The coupler is mainly manufactured in a pull cone type and a diaphragm type. With continuous innovation and development of science and technology, miniaturization of devices such as optical communication, optical fiber hydrophones, optical fiber gyroscopes and EDFAs is a necessary trend, but miniaturization development of optical devices, particularly optical fiber couplers is slow, so that the size of a terminal application system is reduced and limited. Meanwhile, the optical fiber coupler is used as a key optical component, so that the product is miniaturized, and the good parameter performance and high stability and reliability of the product are ensured.

In realizing the utility model discloses in-process, the inventor finds that there is following problem at least among the prior art, and at present, the fiber coupler effect is still not ideal, for example, the technical scheme who records in the technical document with application number 200920194459.4 adopts quartz groove + pyrocondensation pipe structure, and the cover pyrocondensation pipe structure is though the volume can be done for a short time, but the pyrocondensation pipe material shrinkage degree receives the temperature influence great, in case appear excessive shrink will cause the extrusion to quartz inslot optic fibre, and product temperature variation performance can worsen.

For another example, in the technical solution described in the technical document with application number 201810129349.3, the quartz groove + glass tube structure is adopted, the temperature performance of the glass tube direct filling structure is good, but the product volume packaged by the glass tube is large, especially the multi-stage glass tube nested packaging can cause that the product volume and size cannot be further reduced, the requirement of product miniaturization cannot be met, in addition, the cost of the glass tube material is high, and the glass tube is easy to crack in stress release, vibration impact test and high temperature and high humidity test, which causes product scrapping or failure. Especially in the aspect of miniaturization and packaging, the cost of the glass tube is higher, and the glass tube has a larger cracking ratio. For example, 2.4mm outer diameter steel pipe (the outer diameter of the conventional steel pipe is more than 3.0 mm). In order to ensure a certain vibration impact performance of the glass tube direct irrigation structure, the outer diameter of the glass tube must be smaller than the inner diameter of the steel tube by more than 0.6 mm. If the encapsulation of a steel tube (the inner diameter is less than 2.2 mm) with the outer diameter of 2.4mm is to be realized, the outer diameter of the glass tube needs to be less than 1.6mm, a U-shaped quartz groove for fixing an optical fiber is arranged in the glass tube, the outer diameter of a quartz substrate which can be manufactured in batch at present is more than 1.0mm, the inner diameter of the glass tube needs to be more than 1.0mm, and the wall thickness of the glass tube is less than 0.3 mm. The glass tube is high in material cost, and the problem of mouth cracking or cracking of the glass tube is easily caused, so that the qualification rate is low, and the product failure risk is high.

Disclosure of Invention

The utility model discloses aim at solving one of the above-mentioned technical problem among the prior art to a certain extent at least. Therefore, the embodiment of the utility model provides an optical fiber coupler structure can effectively guarantee that the product has good parameter performance and high reliable and stable performance under the condition that whole shell encapsulation size shortens.

The optical fiber coupler structure comprises a hollow heat-shrinkable tube; the quartz seat body is provided with a containing groove, and the containing groove is provided with a coupling optical fiber; and the quartz cover body covers the accommodating groove, and the quartz cover body is matched with the quartz seat body and then placed in the heat shrinkage tube.

In an alternative or preferred embodiment, the coupling optical fiber is bonded to the quartz seat body by glue at a counter-coupling region between the coupling optical fiber and the quartz seat body.

In an alternative or preferred embodiment, the glue is a low stress glue.

In an optional or preferred embodiment, the cross section of the accommodating groove is in a trapezoid shape, and the width of the accommodating groove is gradually increased from inside to outside.

In an alternative or preferred embodiment, the heat shrinkable tube further comprises an encapsulation shell, and the encapsulation shell is wrapped outside the heat shrinkable tube.

In an alternative or preferred embodiment, the enclosure is a stainless steel member.

Based on the technical scheme, the embodiment of the utility model provides a following beneficial effect has at least: above-mentioned technical scheme covers the storage tank through arranging quartzy lid in quartzy pedestal top to the coupling optic fibre in the protection storage tank can not influence the coupling district because of the material shrinkage characteristic of pyrocondensation pipe when the ambient temperature changes, effectively guarantees the temperature change performance, can guarantee resistant vibration, shock test performance under the condition that whole encapsulation size shortens at the product, has stable high reliability performance.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.

Fig. 1 is a perspective view of a first embodiment of the present invention;

fig. 2 is a side view of a first embodiment of the present invention;

fig. 3 is a sectional view of a second embodiment of the present invention.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the positional or orientational descriptions, such as the central, longitudinal, lateral, length, width, thickness, upper, lower, front, rear, left, right, vertical, horizontal, top, bottom, inner, outer, clockwise, counterclockwise, axial, radial, circumferential, etc., are based on the positional or orientational relationships shown in the drawings and are for convenience of description only and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered as limiting the present invention.

In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and larger, smaller, larger, etc. are understood as excluding the present number, and larger, lower, inner, etc. are understood as including the present number unless otherwise specifically limited. Furthermore, the descriptions of first and second are only for the purpose of distinguishing between technical features, and are not to be construed as indicating or implying relative importance or implying any number or order of indicated technical features.

In the description of the present invention, unless otherwise clear and definite limitations, words such as setting, arranging, installing, connecting, linking, fixing, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention by combining the specific contents of the technical solutions.

In the description of the present invention, unless otherwise expressly limited, the first feature may be located above or below the second feature and may be directly in contact with the second feature or indirectly in contact with the first feature through intervening media. Also, a first feature may be directly above or obliquely above a second feature, or merely that the first feature is at a higher level than the second feature. A first feature may be directly below or obliquely below a second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

The first embodiment is as follows:

referring to fig. 1 to 2, an optical fiber coupler structure includes a heat shrinkable tube 11, a quartz base 12 and a quartz cover 14, wherein the heat shrinkable tube 11 is hollow. The quartz seat body 12 is provided with a containing groove 13, the containing groove 13 is provided with the coupling optical fiber 21, and the quartz cover body 14 covers the containing groove 13, so that when the external temperature changes, for example, within the range of-55 ℃ to 100 ℃, the quartz seat body 12 and the quartz cover body 14 cannot extrude the coupling optical fiber 21, and the temperature change performance of the optical fiber coupler structure is ensured.

Specifically, the quartz cover 14 is fitted with the quartz base 12 and then placed in the heat shrinkable tube 11, and then assembled as shown in fig. 2, and then the heat shrinkable tube 11 is heat shrunk.

Preferably, the cross-section of the receiving groove 13 is trapezoidal, and the width of the receiving groove 13 is gradually increased from inside to outside, as shown in fig. 2, so that the coupling optical fiber 21 can be conveniently placed in the receiving groove 13. The quartz cover 14 is assembled with the quartz base 12 to have a cylindrical shape so as to be inserted into the heat shrinkable tube 11.

In this embodiment, the optical fiber coupler structure adopts a structure assembled by the quartz seat body 12, the quartz cover body 14 and the heat shrink tube 11, so as to ensure the impact resistance test performance of the product, reduce the failure risk of the product, and realize the miniaturization of the product.

As can be understood in conjunction with fig. 3, the coupling optical fiber 21 is bonded to the quartz holder body 12 by glue 32 at the counter-coupling region between the coupling optical fiber 21 and the quartz holder body 12. In this embodiment, the glue 32 is a low stress glue. Due to the fact that the packaging size of the whole shell of the product is shortened, the coupling area of the coupling optical fiber and the quartz seat body is fixed by the low-stress glue under the condition that the length of the original tapered is kept unchanged, and the phenomenon of glue deformation caused by the fact that the fixed position of the glue is close to the coupling area can be avoided for product parameters.

Example two:

referring to fig. 3, a difference from the embodiment is that in the embodiment, an encapsulation shell 31 is further included, and the encapsulation shell 31 wraps the heat shrinkable tube 11 to effectively protect the heat shrinkable tube 11. Wherein, the package case 31 is a stainless member.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (6)

1. An optical fiber coupler structure, characterized by: comprises that

A hollow heat shrinkable tube (11);

the optical fiber coupler comprises a quartz seat body (12), wherein the quartz seat body (12) is provided with an accommodating groove (13), and a coupling optical fiber (21) is placed in the accommodating groove (13); and

the quartz cover body (14) covers the accommodating groove (13), and the quartz cover body (14) is matched with the quartz base body (12) and then is arranged in the heat shrinkage pipe (11).

2. The fiber coupler structure of claim 1, wherein: and the coupling optical fiber (21) is bonded to the quartz seat body (12) by adopting glue (32) at a counter-coupling area between the coupling optical fiber (21) and the quartz seat body (12).

3. The fiber coupler structure of claim 2, wherein: the glue (32) is low-stress glue.

4. The fiber coupler structure of claim 1, wherein: the cross section of the accommodating groove (13) is in a trapezoid shape, and the groove width of the accommodating groove (13) is gradually enlarged from inside to outside.

5. The fiber coupler structure according to any one of claims 1 to 4, wherein: the heat-shrinkable tube is characterized by further comprising an encapsulation shell (31), wherein the encapsulation shell (31) is wrapped outside the heat-shrinkable tube (11).

6. The fiber coupler structure of claim 5, wherein: the packaging shell (31) is a stainless steel component.

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