CN218896212U - Optical coupler - Google Patents
Optical coupler Download PDFInfo
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- CN218896212U CN218896212U CN202222917533.9U CN202222917533U CN218896212U CN 218896212 U CN218896212 U CN 218896212U CN 202222917533 U CN202222917533 U CN 202222917533U CN 218896212 U CN218896212 U CN 218896212U
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Abstract
The application discloses an optical coupler, and relates to the technical field of optical fiber equipment. The optical fiber collimator comprises an optical fiber array, a reflecting mirror, and a first collimator and a second collimator which are arranged side by side at one end of the optical fiber array, wherein the first collimator and the second collimator are positioned between the optical fiber array and the reflecting mirror, and an optical filter is arranged on the first collimator so that incident light enters along the optical fiber array, and the incident light is split by the optical filter and the reflecting mirror and then exits along the optical fiber array. The single-side fiber outlet can be realized, so that the integration level in use is improved.
Description
Technical Field
The application relates to the technical field of optical fiber equipment, in particular to an optical coupler.
Background
With the advent of the information age, the transmission of information has become particularly important. Optical fiber communication is one of important communication modes, and people are increasingly free from optical fiber communication due to the advantages of wide frequency band, large communication capacity, low loss, long relay distance, no crosstalk interference, good confidentiality, electromagnetic interference resistance and the like.
In optical fiber communication, an optical coupler is needed to divide one path of light into a plurality of paths according to proportion, the existing coupler divides the incident light into 50% of reflected light and 50% of transmitted light through a light splitting diaphragm, then the reflected light and the transmitted light are received by a collimator and packaged by a glass tube sleeve, and one of the incident light and the split light is arranged on one side of the optical coupler, and the other split light is arranged on the other side of the optical coupler, so that the external interface is arranged more dispersedly, and the integration level is not facilitated.
Disclosure of Invention
The purpose of the application is to provide an optical coupler, which can realize single-side fiber output so as to improve the integration level during use.
Embodiments of the present application are implemented as follows:
the embodiment of the application provides an optical coupler, which comprises an optical fiber array, a reflecting mirror, and a first collimator and a second collimator which are arranged side by side at one end of the optical fiber array, wherein the first collimator and the second collimator are positioned between the optical fiber array and the reflecting mirror, and an optical filter is arranged on the first collimator so that incident light enters along the optical fiber array and exits along the optical fiber array after being split by the optical filter and the reflecting mirror.
Optionally, the optical fiber array includes a first optical fiber, a second optical fiber, a third optical fiber and a fourth optical fiber that are arranged side by side, where the first optical fiber and the second optical fiber correspond to the first collimator, and the third optical fiber and the fourth optical fiber correspond to the second collimator; the incident light is incident along the first optical fiber, and the split light beams are respectively emitted along the second optical fiber and the fourth optical fiber, or the split light beams are respectively emitted along the second optical fiber and the third optical fiber.
Optionally, the first collimator and the second collimator are glued together.
Optionally, the filter is a dichroic filter, a bandpass filter, or a dichroic film.
Optionally, the light-splitting film is a semi-transparent semi-reflective film.
Optionally, the reflecting mirror is a plane mirror or a curved mirror.
Optionally, the optical coupler further includes a housing, and the first collimator, the second collimator, and the reflecting mirror are respectively disposed in the housing.
Optionally, a reflective cavity is formed in the housing, the reflective cavity being located between the mirror and the first collimator.
Optionally, the first collimator and the second collimator are self-focusing lenses.
Optionally, the self-focusing lens is cylindrical.
The beneficial effects of the embodiment of the application include:
according to the optical coupler provided by the embodiment of the application, through the arrangement modes of the optical fiber array, the first collimator, the second collimator, the optical filter and the reflecting mirror, when incident light rays enter from the optical fiber array, the incident light rays reach the first collimator, are refracted to the optical filter through the first collimator, after the optical filter splits the incident light rays, part of the light rays are reflected back to the first collimator, are refracted through the first collimator, enter the optical fiber array, are emitted from the optical fiber array, and are parallel to the incident light rays; the other part of light reaches the reflecting mirror, the reflecting surface of the reflecting mirror reflects the transmitted light to the second collimator, the light transmitted by the filter enters the optical fiber array after being refracted by the second collimator and then is emitted from the optical fiber array, so that the incident light and the split light beams are at the same side of the optical coupler, and single-side fiber output can be realized, so that the integration level in use is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an optical coupler according to an embodiment of the present application.
Icon: 10-an optical fiber array; 12-a first optical fiber; 14-a second optical fiber; 16-a third optical fiber; 18-fourth optical fiber; a 20-mirror; 30-a first collimator; a 32-filter; 40-a second collimator; 50-a housing; 52-reflective cavity.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present application, it should be noted that, the azimuth or positional relationship indicated by the terms "inner", "outer", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship that is commonly put when the product of the application is used, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
In the prior art, an optical coupler is needed to divide one path of light into a plurality of paths according to proportion in optical fiber communication, the existing coupler divides the incident light into two beams of reflected 50% and transmitted 50% through a light splitting diaphragm, then the two beams are received by a collimator and packaged by a glass tube sleeve, and one of the incident light and the split light is arranged on one side of the optical coupler, and the other split light is arranged on the other side of the optical coupler, so that the external interface is arranged more dispersedly, and the integration level is not facilitated. In order to solve the above problems, the embodiments of the present application provide the following technical solutions to overcome the above problems.
Referring to fig. 1, an optical coupler is provided in the embodiments of the present application, which includes an optical fiber array 10, a reflector 20, and a first collimator 30 and a second collimator 40 disposed side by side at one end of the optical fiber array 10, wherein the first collimator 30 and the second collimator 40 are located between the optical fiber array 10 and the reflector 20, and an optical filter 32 is disposed on the first collimator 30, so that incident light enters along the optical fiber array 10, and the incident light is split by the optical filter 32 and the reflector 20 and then exits along the optical fiber array 10.
The collimator converts a light beam having a large divergence angle (small beam waist) into a light beam having a small divergence angle (large beam waist) by a lens, thereby coupling the light beam into other optical devices with low loss.
According to the optical coupler provided by the embodiment of the application, through the arrangement modes of the optical fiber array 10, the first collimator 30, the second collimator 40, the optical filter 32 and the reflecting mirror 20, when incident light rays enter from the optical fiber array 10, the incident light rays reach the first collimator 30, are refracted to the optical filter 32 through the first collimator 30, after the optical filter 32 splits the incident light rays, part of the light rays are reflected back to the first collimator 30, are refracted through the first collimator 30, enter the optical fiber array 10, are emitted from the optical fiber array 10, and are parallel to the incident light rays; the other part of light reaches the reflecting mirror 20, the reflecting surface of the reflecting mirror 20 reflects the transmitted light to the second collimator 40, the light transmitted from the optical filter 32 enters the optical fiber array 10 after being refracted by the second collimator 40, and then is emitted from the optical fiber array 10, so that the incident light and the split light beam are on the same side of the optical coupler, and single-side fiber output can be realized, so that the integration level in use is improved.
Referring to fig. 1, in the embodiment of the present application, the optical fiber array 10 includes a first optical fiber 12, a second optical fiber 14, a third optical fiber 16 and a fourth optical fiber 18 arranged side by side, where the first optical fiber 12 and the second optical fiber 14 correspond to a first collimator 30, and the third optical fiber 16 and the fourth optical fiber 18 correspond to a second collimator 40; the incident light is incident along the first optical fiber 12 and the split light beams are emitted along the second optical fiber 14 and the fourth optical fiber 18, respectively, or the split light beams are emitted along the second optical fiber 14 and the third optical fiber 16, respectively.
Specifically, the incident light rays enter from the first optical fiber 12, reach the first collimator 30, are refracted to the optical filter 32 by the first collimator 30, after the optical filter 32 splits the incident light rays, part of the light rays are reflected back to the first collimator 30, are refracted by the first collimator 30, enter the second optical fiber 14, and are emitted from the second optical fiber 14; the other part of the light reaches the reflecting mirror 20, the reflecting surface of the reflecting mirror 20 reflects the light to the second collimator 40, the light enters the fourth optical fiber 18 after being refracted by the second collimator 40, and then is emitted from the fourth optical fiber 18, and the light is parallel to the incident light.
It will be appreciated that, after the light is refracted by the second collimator 40, the light may enter the third optical fiber 16 or the fourth optical fiber 18 due to different wavelengths of the light, and the above description only describes the case of entering the fourth optical fiber 18, which is not intended to limit the present application.
In the embodiment of the present application, the first collimator 30 and the second collimator 40 are glued together.
It should be noted that there are many methods for connecting the first collimator 30 and the second collimator 40, and the embodiment of the present application is preferably a glue connection. By adopting the design, the production process and the production cost can be reduced, the production efficiency can be improved, the relative position relationship between the two can be kept fixed, and the stability in use can be improved.
In the embodiments of the present application, the filter 32 is a spectral film, a dichroic filter, or a bandpass filter. In an embodiment of the present application, the light-splitting film is a semi-transparent semi-reflective film.
Specifically, the light splitting film can divide the light beam into two parts, one part is reflected light and the other part is transmitted light, the reflectivity and the transmissivity of the light splitting film are not particularly limited, and different designs can be made according to actual requirements. By adopting the design, the cost can be reduced, and the space occupation ratio of the beam splitter can be reduced.
In the embodiments of the present application, the mirror 20 is a flat mirror or a curved mirror.
It should be noted that, the types of the reflecting mirror 20 are very many, and the requirements for different reflecting light paths can be flexibly set according to the actual situation, and the preferred embodiment is a plane mirror. With the above design, the light can be reflected to the second collimator 40, so as to meet the design requirement.
Referring to fig. 1, in the embodiment of the present application, the optical coupler further includes a housing 50, and the first collimator 30, the second collimator 40, and the reflecting mirror 20 are respectively disposed in the housing 50.
Specifically, the first collimator 30 and the second collimator 40 are disposed at one end of the housing 50, and the reflecting mirror 20 is disposed at the other end of the housing 50.
It should be noted that the length of the housing 50 is not particularly limited, and may be flexibly set according to the angle of light reflection.
The housing 50 provided in the embodiment of the present application achieves the protection and fixing functions of the first collimator, the second collimator 40 and the reflecting mirror 20 by arranging the first collimator 30, the second collimator 40 and the reflecting mirror 20 in the housing 50.
In the embodiment of the present application, a reflective cavity 52 is formed within the housing 50, the reflective cavity 52 being located between the mirror 20 and the first collimator 30.
The light path of the reflected light is within the reflective cavity 52. By adopting the above form, the reflected light is protected, and the interference of the outside on the reflected light is reduced.
In the embodiment of the present application, the first collimator 30 and the second collimator 40 are both self-focusing lenses.
It should be noted that, the refractive index distribution of the self-focusing lens material gradually decreases along the radial direction, so that light transmitted along the axial direction can be continuously refracted, and thus, emergent light is smoothly and continuously converged to a point, collimation is reversible application of the focusing function, and for a 1/4 pitch self-focusing lens, when converging light is input from one end face of the self-focusing lens, the converging light is converted into parallel light after passing through the self-focusing lens. By adopting the design, the requirements on light focusing and collimation are met.
In an embodiment of the present application, the self-focusing lens is cylindrical.
The cylindrical and small appearance of the self-focusing lens can be used in various micro optical systems more conveniently. By adopting the design, the volume of the optical coupler is reduced.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (10)
1. The optical coupler is characterized by comprising an optical fiber array, a reflecting mirror, and a first collimator and a second collimator which are arranged side by side at one end of the optical fiber array, wherein the first collimator and the second collimator are positioned between the optical fiber array and the reflecting mirror, and an optical filter is arranged on the first collimator so that incident light enters along the optical fiber array, and the incident light is split by the optical filter and the reflecting mirror and then exits along the optical fiber array.
2. The optical coupler of claim 1, wherein the fiber array comprises a first fiber, a second fiber, a third fiber, and a fourth fiber disposed side-by-side, wherein the first fiber and the second fiber correspond to the first collimator and the third fiber and the fourth fiber correspond to the second collimator; the incident light is incident along the first optical fiber, and the split light beams are respectively emitted along the second optical fiber and the fourth optical fiber, or the split light beams are respectively emitted along the second optical fiber and the third optical fiber.
3. The optical coupler of claim 2, wherein the first collimator and the second collimator are adhesively bonded.
4. The optical coupler of claim 3, wherein the optical filter is a dichroic filter, a bandpass filter, or a dichroic film.
5. The optical coupler of claim 4, wherein the light splitting film is a semi-transmissive semi-reflective film.
6. The optical coupler of claim 5, wherein the mirror is a flat mirror or a curved mirror.
7. The optical coupler of claim 6, further comprising a housing, wherein the first collimator, the second collimator, and the mirror are disposed within the housing, respectively.
8. The optical coupler of claim 6, wherein a reflective cavity is formed within the housing, the reflective cavity being located between the mirror and the first collimator.
9. The optical coupler according to any one of claims 1 to 8, wherein the first collimator and the second collimator are self-focusing lenses.
10. The optical coupler of claim 9, wherein the self-focusing lens is cylindrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222917533.9U CN218896212U (en) | 2022-11-02 | 2022-11-02 | Optical coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222917533.9U CN218896212U (en) | 2022-11-02 | 2022-11-02 | Optical coupler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218896212U true CN218896212U (en) | 2023-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222917533.9U Active CN218896212U (en) | 2022-11-02 | 2022-11-02 | Optical coupler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218896212U (en) |
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2022
- 2022-11-02 CN CN202222917533.9U patent/CN218896212U/en active Active
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