CN217981924U

CN217981924U - Diaphragm type optical fiber coupler

Info

Publication number: CN217981924U
Application number: CN202222295626.2U
Authority: CN
Inventors: 智春玮; 严安全; 杜永建; 智健
Original assignee: Orte Photonics Co ltd
Current assignee: Orte Photonics Co ltd
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2022-12-06
Anticipated expiration: 2032-08-30

Abstract

The utility model discloses a diaphragm formula fiber coupler, including fixed outer tube, first fixed endotheca, the fixed endotheca of second, the fixed endotheca of third, in the middle part of fixed outer tube was located to the fixed endotheca of second, in the both ends of fixed outer tube were located to the fixed endotheca of first fixed endotheca and third cover respectively, be provided with first tail optical fiber subassembly in the first fixed endotheca, be provided with diaphragm formula lens subassembly in the fixed endotheca of second, be provided with the second tail optical fiber subassembly in the fixed endotheca of third. The utility model discloses a diaphragm formula fiber coupler inserts in fixed outer sleeve and establishes first fixed endotheca, the fixed endotheca of second, the fixed endotheca of third, through setting up first tail optical fiber subassembly, lens subassembly, second tail optical fiber subassembly respectively in first fixed endotheca, the fixed endotheca of second, the fixed endotheca of third for first tail optical fiber subassembly, lens subassembly, second tail optical fiber subassembly can both be fixed well in fixed outer sleeve, have improved the resistant mechanical shock ability of product.

Description

Diaphragm type optical fiber coupler

Technical Field

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

Background

The optical fiber coupler is a passive optical device, is an important component in an optical fiber communication system, is used for realizing optical signal splitting/combining or for prolonging an optical fiber link, has the advantages of smaller volume, smaller wavelength-dependent loss, avoidance of water peaks and the like compared with the traditional fused biconical taper type optical fiber coupler for different types of the optical fiber coupler, and is widely applied to high-precision and miniaturized equipment.

However, with the increasingly competitive optical communication market, the industry has higher requirements for passive optical devices, which requires products with superior parameter performance, smaller product size and higher mechanical performance. For example, in the existing diaphragm coupler, a lens plated with a light splitting film and a double-fiber tail fiber are debugged during manufacturing, glue is adopted to bond the lens plated with the light splitting film and the double-fiber tail fiber at the connecting end face of the lens plated with the light splitting film and the double-fiber tail fiber after debugging, the whole lens plated with the light splitting film and one part of the double-fiber tail fiber are in a suspended state, and the product is easy to break under the condition of strong impact due to the fact that the materials are all glass structures, and the product is caused to fail.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a diaphragm-type optical fiber coupler, which solves one or more problems of the prior art and provides at least one of the advantages of the present invention.

The technical scheme adopted for solving the technical problems is as follows:

the utility model provides a diaphragm formula fiber coupler, including fixed outer tube, first fixed endotheca, the fixed endotheca of second, the fixed endotheca of third, the fixed endotheca of second is located in the middle part of fixed outer tube, first fixed endotheca with the fixed endotheca of third is overlapped respectively and is located in the both ends of fixed outer tube, be provided with first tail optical fiber subassembly in the first fixed endotheca, be provided with diaphragm formula lens subassembly in the fixed endotheca of second, be provided with second tail optical fiber subassembly in the fixed endotheca of third.

The beneficial effects of the utility model are that: the first fixing inner sleeve, the second fixing inner sleeve and the third fixing inner sleeve are inserted into the fixing outer sleeve, and the first tail fiber assembly, the membrane type lens assembly and the second tail fiber assembly are respectively arranged in the first fixing inner sleeve, the second fixing inner sleeve and the third fixing inner sleeve, so that the first tail fiber assembly, the membrane type lens assembly and the second tail fiber assembly can be well fixed in the fixing outer sleeve.

As a further improvement of the above technical solution, the first fixed inner sleeve, the second fixed inner sleeve, and the third fixed inner sleeve are all bonded in the fixed outer sleeve by a bonding agent.

As a further improvement of the above technical solution, the first pigtail assembly is bonded in the first fixed inner sleeve by an adhesive.

As a further improvement of the above technical solution, the second pigtail assembly is bonded in the third fixing inner sleeve by an adhesive.

As a further improvement of the above technical solution, the diaphragm type lens assembly includes a light splitting film lens and a collimating lens, the light splitting film lens is located at a side close to the first pigtail assembly, the collimating lens is located at a side close to the second pigtail assembly, and a light splitting diaphragm is disposed at an end of the light splitting film lens facing the collimating lens. When the optical fiber coupler is used, light with corresponding wavelength input from the first tail fiber component is reflected by the light splitting film lens and then output by the first tail fiber component, and the rest of light is transmitted by the light splitting film lens, input to the second tail fiber component through the collimating lens and output, so that the light splitting function of the optical fiber coupler is realized.

As a further improvement of the above technical solution, the spectroscopic film lens and the collimating lens are bonded to the second fixing inner sleeve by an adhesive. During assembly, the adhesive is coated on the contact surfaces of the light splitting film lens, the collimating lens and the second fixing inner sleeve, and the adhesive can be coated thinly through size control, so that the problem of extrusion of the adhesive on the lens is solved, and the temperature impact resistance of a product is greatly improved.

As a further improvement of the above technical solution, the first pigtail assembly includes a double-fiber pigtail, and the second pigtail assembly includes a single-fiber pigtail.

As a further improvement of the above technical solution, the first pigtail assembly and the diaphragm lens assembly are arranged at an interval along the axial direction of the fixed outer sleeve, and the optical power reflection function is realized by adjusting the interval between the first pigtail assembly and the diaphragm lens assembly.

As a further improvement of the technical scheme, the second tail fiber component and the diaphragm type lens component are arranged at intervals along the axial direction of the fixed outer sleeve, and the transmission function of the optical power is realized by adjusting the interval between the second tail fiber component and the diaphragm type lens component.

As a further improvement of the above technical solution, the fixed outer sleeve, the first fixed inner sleeve, the second fixed inner sleeve, and the third fixed inner sleeve are all glass sleeves. The glass sleeve has good visualization effect, is beneficial to observing and adjusting each part in the assembly process, and can quickly finish curing through external light irradiation when the light curing adhesive is adopted for bonding the fixed outer sleeve, the first fixed inner sleeve, the second fixed inner sleeve and the third fixed inner sleeve, so that the curing efficiency can be improved.

Drawings

The invention will be further described with reference to the accompanying drawings and examples;

fig. 1 is a schematic structural diagram of a diaphragm optical fiber coupler according to an embodiment of the present invention;

fig. 2 is a schematic view of a fixing structure of a first pigtail assembly according to an embodiment of the present invention;

fig. 3 is a schematic view of a fixing structure of a diaphragm lens assembly according to an embodiment of the present invention;

fig. 4 is a schematic view of a fixing structure of a second pigtail assembly according to an embodiment of the present invention.

Detailed Description

This section will describe in detail the embodiments of the present invention, the preferred embodiments of which 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 visually and vividly understand each technical feature and the whole technical solution of the present invention, but it cannot be understood as a limitation to the scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, 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 combination with the specific contents of the technical solution.

Referring to fig. 1 to 4, a diaphragm type optical fiber coupler according to an embodiment of the present invention is described, including a fixed outer sleeve 400, a first fixed inner sleeve 120, a second fixed inner sleeve 220, and a third fixed inner sleeve 320 inserted into the fixed outer sleeve 400 from left to right in sequence, the first fixed inner sleeve 120 and the third fixed inner sleeve 320 are respectively located at left and right ends of the fixed outer sleeve 400, and the first fixed inner sleeve 120, the second fixed inner sleeve 220, and the third fixed inner sleeve 320 are all bonded in the fixed outer sleeve 400 by a bonding agent, and the bonding agent is located between outer surfaces of the first fixed inner sleeve 120, the second fixed inner sleeve 220, and the third fixed inner sleeve 320 and an inner surface of the fixed outer sleeve 400.

The first tail fiber assembly is arranged in the first fixing inner sleeve 120 in a penetrating mode, the first tail fiber assembly is set to be a light source input end, the first tail fiber assembly comprises a double-fiber tail fiber 110 and a first tail fiber retaining member 130 for fixing the double-fiber tail fiber 110, the double-fiber tail fiber 110 comprises an input port 111 and an output port 112, the double-fiber tail fiber 110 is inserted into the first tail fiber retaining member 130, the first tail fiber retaining member 130 is arranged in the first fixing inner sleeve 120 in a penetrating mode, and the outer surface of the first tail fiber retaining member 130 is bonded with the inner surface of the first fixing inner sleeve 120 through a bonding agent.

A second tail fiber assembly penetrates through the third fixing inner sleeve 320, the second tail fiber assembly is arranged as a light source output end, the second tail fiber assembly comprises a single-fiber tail fiber 310 and a second tail fiber retaining member 330 for fixing the single-fiber tail fiber 310, the single-fiber tail fiber 310 is inserted into the second tail fiber retaining member 330, and the outer surface of the second tail fiber retaining member 330 is bonded with the inner surface of the third fixing inner sleeve 320 through a bonding agent.

Wear to be equipped with membrane formula lens subassembly in the fixed endotheca 220 of second, membrane formula lens subassembly sets up between first tail optical fiber subassembly and second tail optical fiber subassembly, membrane formula lens subassembly includes beam splitting membrane lens 210, collimating lens 230, optical membrane lens 210, collimating lens 230's the surface bonds through the binder with the fixed endotheca 220's of second internal surface, beam splitting membrane lens 210 is located the one side of being close to first tail optical fiber subassembly, beam splitting membrane lens 210 is provided with the beam splitting diaphragm towards collimating lens 230's one end, this beam splitting diaphragm adopts gain flattening filter, collimating lens 230 is located the one side of being close to second tail optical fiber subassembly.

When the optical fiber coupler is used, a light source with a corresponding wavelength is input from the input port 111 of the first pigtail assembly, after the light source passes through the light splitting film lens, the light splitting film sheet reflects light with energy in a specific proportion, the reflected light is output through the output port 112 of the first pigtail assembly, the light with the residual proportion passes through the light splitting film lens 210 and is input into the second pigtail assembly through the collimating lens 230 and is output, and therefore the light splitting function of the film type optical fiber coupler is achieved.

In addition, be equipped with the interval between first pigtail subassembly and the beam splitting membrane lens 210, during the assembly, realize the reflection function of luminous power through adjusting the interval of first pigtail subassembly and beam splitting membrane lens 210.

And a space is arranged between the second tail fiber component and the collimating lens 230, and during assembly, the transmission function of optical power is realized by adjusting the space between the second tail fiber component and the diaphragm type lens component.

Furthermore, the first fixed inner sleeve 120, the second fixed inner sleeve 220, the third fixed inner sleeve 320 and the fixed outer sleeve 400 are all made of transparent glass sleeves, so that the glass sleeves have good visualization effect and are beneficial to observation and adjustment of all parts in the assembling process.

Further, the first fixed inner housing 120, the second fixed inner housing 220, the third fixed inner housing 320 and the fixed outer housing 400 are bonded by a photo-curing adhesive, the first pigtail holding member 130 and the first fixed inner housing 120 are bonded by a photo-curing adhesive, the second pigtail holding member 330 and the third fixed inner housing 320 are bonded by a photo-curing adhesive, and the spectroscopic film lens 210, the collimating lens 230 and the second fixed inner housing 220 are bonded by a photo-curing adhesive. Since the first, second, third and

outer fixing sleeves

120, 220, 320 and 400 are transparent glass sleeves, curing can be rapidly completed by irradiating light outside the diaphragm-type optical fiber coupler when light curing adhesive is used, and thus curing efficiency can be improved. In other embodiments, the adhesive is not limited to photo-curing adhesive, and other curing adhesives, such as thermal curing agent, may be used.

Furthermore, the beam splitting film lens 210, the collimating lens 230 and the second fixing inner sleeve 220 form a close-fit assembly mode through size control, so that the adhesive is coated thinly, the extrusion of the stress of the adhesive on the lens can be solved, and the temperature impact resistance of the product is improved.

The diaphragm type optical fiber coupler of the embodiment is characterized in that the first fixed inner sleeve 120, the second fixed inner sleeve 220 and the third fixed inner sleeve 320 are inserted into the fixed outer sleeve, and the first tail fiber assembly, the diaphragm type lens assembly and the second tail fiber assembly are respectively arranged in the first fixed inner sleeve 120, the second fixed inner sleeve 220 and the third fixed inner sleeve 330, so that the first tail fiber assembly, the diaphragm type lens assembly and the second tail fiber assembly can be well fixed in the fixed outer sleeve.

The manufacturing method comprises the following steps:

firstly, the spectral film lens 210 and the collimating lens 230 are bonded and fixed in the second fixed inner sleeve 220, and then the diaphragm type lens assembly is bonded and fixed with the fixed outer sleeve 400; the input end of the light source adopts a double-fiber tail fiber, a first tail fiber assembly comprising the double-fiber tail fiber 110 is fixedly bonded in the first fixed inner sleeve 120, and then the axial position of the first fixed inner sleeve 120 in the fixed outer sleeve 400 is adjusted to enable the spectroscopic film lens 210 to realize the reflection function of the light power and be bonded and cured; the output end of the light source adopts single fiber pigtails, the second pigtail assembly including the single fiber pigtails 310 is fixedly bonded in the third fixed inner sleeve 320, and then the axial position of the third fixed inner sleeve 320 in the fixed outer sleeve 400 is adjusted to enable the collimating lens 230 to realize the transmission function of optical power and be bonded and cured, so that the final product realizes the light splitting function.

While the preferred embodiments of the present invention have been described, the present invention is not limited to the above-described embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are to be included within the scope of the present invention defined by the claims.

Claims

1. A diaphragm type optical fiber coupler is characterized in that: the fiber optic cable tail fixing device comprises a fixing outer sleeve (400), a first fixing inner sleeve (120), a second fixing inner sleeve (220) and a third fixing inner sleeve (320), wherein the second fixing inner sleeve (220) is sleeved in the middle of the fixing outer sleeve (400), the first fixing inner sleeve (120) and the third fixing inner sleeve (320) are respectively sleeved in two ends of the fixing outer sleeve (400), a first tail fiber component is arranged in the first fixing inner sleeve (120), a diaphragm type lens component is arranged in the second fixing inner sleeve (220), and a second tail fiber component is arranged in the third fixing inner sleeve (320).

2. The diaphragm optical fiber coupler of claim 1, wherein: the first fixed inner sleeve (120), the second fixed inner sleeve (220) and the third fixed inner sleeve (320) are all bonded in the fixed outer sleeve (400) through bonding agents.

3. The diaphragm optical fiber coupler of claim 2, wherein: the first tail fiber assembly is bonded in the first fixing inner sleeve (120) through a bonding agent.

4. The diaphragm optical fiber coupler of claim 2, wherein: the second tail fiber assembly is bonded in the third fixing inner sleeve (320) through a bonding agent.

5. The diaphragm optical fiber coupler of claim 1, wherein: the diaphragm type lens assembly comprises a light splitting film lens (210) and a collimating lens (230), the light splitting film lens (210) is located on one side close to the first tail fiber assembly, the collimating lens (230) is located on one side close to the second tail fiber assembly, and a light splitting diaphragm is arranged at one end, facing the collimating lens (230), of the light splitting film lens (210).

6. The diaphragm optical fiber coupler of claim 5, wherein: the light splitting film lens (210) and the collimating lens (230) are bonded to the second fixing inner sleeve (220) through bonding agents.

7. The diaphragm optical fiber coupler of claim 5, wherein: the first pigtail assembly comprises a dual-fiber pigtail (110) and the second pigtail assembly comprises a single-fiber pigtail (310).

8. The diaphragm optical fiber coupler according to claim 1, wherein: the first tail fiber assembly and the diaphragm type lens assembly are arranged at intervals along the axial direction of the fixed outer sleeve (400).

9. The diaphragm optical fiber coupler according to claim 1, wherein: the second tail fiber assembly and the diaphragm type lens assembly are arranged at intervals along the axial direction of the fixed outer sleeve (400).

10. The diaphragm optical fiber coupler according to any one of claims 1 to 9, wherein: the fixed outer sleeve (400), the first fixed inner sleeve (120), the second fixed inner sleeve (220) and the third fixed inner sleeve (320) are all glass sleeves.