CN220171295U - Wave combiner and optical module - Google Patents

Abstract

The utility model discloses a wave combiner and an optical module, and relates to the technical field of optical communication, wherein the wave combiner comprises a plurality of incidence lenses, a wave combining module and an emergent lens which are arranged side by side; the plurality of incidence lenses are respectively arranged corresponding to the wave combining modules, so that light rays incident from the plurality of incidence lenses are respectively combined through the wave combining modules, and the combined light rays are emitted from the emitting lenses. The wave combiner disclosed by the utility model can simplify the arrangement form, reduce the volume of the wave combiner and achieve the purpose of reducing the production and manufacturing cost.

Description

Wave combiner and optical module

Technical Field

The utility model relates to the technical field of optical communication, in particular to a combiner and an optical module.

Background

The wavelength division multiplexing technology is widely applied to the technical field of optical communication, and a wavelength division multiplexer manufactured by taking the wavelength division multiplexing technology as a core is an optical device and mainly comprises a wavelength divider, a wave combiner and a filter.

The combiner is used for combining signals with different wavelengths in each channel into one signal and outputting the signal. However, the existing wave combiner has complex structural design and large volume, so that the whole wavelength division multiplexer has large volume and high production and manufacturing cost.

Disclosure of Invention

The utility model aims to provide a wave combiner and an optical module, which can simplify the arrangement form, reduce the volume of the wave combiner and achieve the purpose of reducing the production and manufacturing cost.

Embodiments of the present utility model are implemented as follows:

in one aspect of the embodiment of the utility model, a combiner is provided, which comprises a plurality of incidence lenses, a combiner module and an emergent lens, wherein the incidence lenses, the combiner module and the emergent lens are arranged side by side; the plurality of incidence lenses are respectively arranged corresponding to the wave combining modules, so that light rays incident from the plurality of incidence lenses are respectively combined through the wave combining modules, and the combined light rays are emitted from the emitting lenses.

Optionally, the emergent lens corresponds to an incident lens located at the edge, the wave combining module comprises a first wave combining element and a plurality of second wave combining elements, the first wave combining element and the plurality of second wave combining elements are arranged side by side along the arrangement direction of the incident lens, the first wave combining element and the plurality of second wave combining elements are respectively arranged in one-to-one correspondence with the plurality of incident lenses, the first wave combining element is located on the main optical axis of the emergent lens, light rays incident to the second wave combining element are reflected by the second wave combining element and then reflected by the first wave combining element and then emergent, and light rays incident to the first wave combining element are transmitted by the first wave combining element and then emergent.

Optionally, the combiner further includes a plurality of optical isolators, the plurality of optical isolators are disposed in one-to-one correspondence with the plurality of incident lenses, and the optical isolators are located at one side of the incident lenses from which light is emitted.

Optionally, the optical isolator includes a first polarizer, a faraday rotator, and a second polarizer that are sequentially disposed, where a polarization direction of the first polarizer forms a preset included angle with a polarization direction of the second polarizer.

Optionally, a total reflection sheet is disposed on the second wave combining element corresponding to the incident lens at the other edge, so that the light incident on the second wave combining element is totally reflected.

Optionally, the second wave combining element and the first wave combining element in the middle are respectively provided with a light splitting sheet, so that part of light rays incident on the light splitting sheet is transmitted.

Optionally, the incident lens is a collimating lens.

Optionally, the exit lens is a converging lens.

In another aspect of the embodiment of the utility model, an optical module is provided, which includes a circuit board, a plurality of light sources arranged on the circuit board side by side, and the above-mentioned combiner, wherein the combiner is arranged on the circuit board, and the plurality of light sources are arranged in one-to-one correspondence with a plurality of incident lenses of the combiner.

Optionally, the optical module is integrally encapsulated.

The beneficial effects of the embodiment of the utility model include: through setting up a plurality of incident lenses that set up side by side respectively with the combination wave module corresponds, make every incident light all can accurately be incident to the combination wave module, the multiple light of incidence is synthesized into a bundle of light and is reemitted from the exit lens under the effect of combination wave module, and the setting form is simple, and the volume reduces when satisfying the combiner function to reach the purpose that reduces manufacturing cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, 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 utility model and therefore should not be considered as limiting the scope, and 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 a combiner according to an embodiment of the present utility model.

Icon: 1-an entrance lens; a 2-optical isolator; 21-a first polarizer; 22-Faraday rotator; 23-a second polarizer; a 3-wave combining module; 31-a first wave combining element; 32-a second wave combining element; 4-exit lens.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The devices of the embodiments of the utility model 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 utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

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 utility model, 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 in use of the product of this application, are merely for convenience of describing the present utility model 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 utility model. 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 utility model, 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 above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1, the present embodiment provides a combiner, which includes a plurality of incident lenses 1, a combiner module 3 and an exit lens 4 arranged side by side; the plurality of incidence lenses 1 are respectively arranged corresponding to the wave combining modules 3, so that the light rays incident from the plurality of incidence lenses 1 are respectively combined through the wave combining modules 3, and the combined light rays are emitted from the emitting lens 4.

Specifically, the plurality of incidence lenses 1 are arranged side by side, so that light with different wavelengths is conveniently incident to the incidence lenses 1 and then collimated to form parallel light, and the wave combination module 3 is correspondingly arranged with the plurality of incidence lenses 1, so that the incident light is conveniently transmitted or refracted, a plurality of beams of light are combined into a beam, and finally the beam is transmitted to the emergent lens 4 to finish emergent. The wave combining module 3 is disposed corresponding to the plurality of incident lenses 1, that is, the wave combining module 3 is disposed at one end of the plurality of incident lenses 1, after the collimated parallel light is transmitted to the wave combining module 3, the wave combining module 3 changes the direction of the parallel light in the plane to complete the beam combination of the light, so the wave combiner provided in the embodiment has the advantages of simple configuration and small volume, and is convenient for production and manufacturing, and saves the production and manufacturing cost.

Meanwhile, in the arrangement mode of the plurality of incidence lenses 1, the wave combination module 3 and the emergent lens 4 in the wave combiner, the incidence light is always in the same plane and finally combined into one beam of light to finish emergent, so that the wave combiner is only required to be coupled once at a receiving end during use, multiple times of coupling are not required, and the use operation is simplified.

In an alternative embodiment, referring to fig. 1, the exit lens 4 corresponds to an incident lens 1 located at an edge, the wave combining module 3 includes a first wave combining element 31 and a plurality of second wave combining elements 32, where the first wave combining element 31 and the plurality of second wave combining elements 32 are arranged side by side along an arrangement direction of the incident lens 1, the first wave combining element 31 and the plurality of second wave combining elements 32 are respectively arranged in one-to-one correspondence with the plurality of incident lenses 1, and the first wave combining element 31 is located on a main optical axis of the exit lens 4, and light incident on the second wave combining element 32 is reflected by the second wave combining element 32 and then reflected by the first wave combining element 31, and then exits after being transmitted by the first wave combining element 31.

Specifically, the plurality of second wave combining elements 32 are disposed in one-to-one correspondence with the plurality of incident lenses 1, so that the light incident from the plurality of incident lenses 1 can only be reflected by the corresponding second wave combining elements 32, so that the plurality of incident light can be combined into one after reflection, and the combined incident light is reflected to the exit lens 4 through the first wave combining element 31 located on the main optical axis of the exit lens 4, so that exit can be completed. The emergent lens 4 corresponds to one of the plurality of incident lenses 1 near the edge, so that the light incident from the incident lens 1 does not need to be reflected, is directly transmitted from the first wave combining element 31 and is combined with other light reflected to the first wave combining element 31, and then is emergent from the emergent lens 4, thereby simplifying the structure and manufacturing flow of the wave combiner, and simplifying the operation difficulty of subsequent use without carrying out multiple coupling operations.

In an alternative embodiment, referring to fig. 1, the combiner further includes a plurality of optical isolators 2, the plurality of optical isolators 2 are disposed in one-to-one correspondence with the plurality of incident lenses 1, and the optical isolators 2 are located at one side of the incident lenses 1 from which light is emitted.

The optical isolators 2 are arranged on one side of the incident lens 1, which emits light, namely, the optical isolators 2 are positioned between the incident lens 1 and the wave combining module 3, so that the direction of the light can be limited, the light can be transmitted in one direction only, namely, the light incident from the incident lens 1 can be transmitted to the wave combining module 3 only through the optical isolators 2, but cannot be emitted through the optical isolators 2 in the opposite direction, and the reliability and the stability of the wave combining device are improved.

Further, the optical isolator 2 includes a first polarizer 21, a faraday rotator 22, and a second polarizer 23 sequentially disposed, and a polarization direction of the first polarizer 21 forms a preset angle with a polarization direction of the second polarizer 23.

Illustratively, the first polarizer 21 forms an included angle of 45 ° with the polarization direction of the second polarizer 23, and the light incident in the forward direction is transmitted to the faraday rotator 22 through the first polarizer 21, and then is rotated by 45 ° counterclockwise to the second polarizer 23 when passing through the faraday rotator 22, so as to be transmitted smoothly; the light beam with reverse incidence is transmitted to the Faraday rotator 22 through the second polarizer 23, and then is rotated 45 degrees counterclockwise to be perpendicular to the polarization direction of the first polarizer 21 when passing through the Faraday rotator 22, so that the light beam is isolated from the transmitted light.

In an alternative embodiment, a total reflection sheet (not shown) is disposed on the second wave combining element 32 corresponding to the incident lens 1 located at the other edge, so that the light incident on the second wave combining element 32 is totally reflected.

The incident lens 1 at the other edge, that is, at the side of the combiner away from the exit lens 4, and the total reflection sheet disposed on the second combining element 32 corresponding to the incident lens 1 is convenient for reflecting all the light incident from the incident lens 1 to the first combining element 31, and the light incident from the incident lens 1 corresponding to the first combining element 31 is combined into one beam at the first combining element 31 and the light reflected from the total reflection sheet and exits from the exit lens 4.

Further, a beam splitter (not shown) is provided on each of the second and first combining elements 32 and 31 located in the middle to transmit a part of light incident on the beam splitter.

Specifically, the beam splitter provided on the second beam combining element 32 positioned in the middle may reflect the light incident from the incident lens 1 corresponding to the second beam combining element 32 positioned in the middle, the light reflected from the second beam combining element 32 positioned at the edge may directly pass through the beam splitter, and two beams of light may be combined into one beam at the beam splitter and incident to the first beam combining element 31. The beam splitter provided on the first combining element 31 may reflect the light beam reflected from the second combining element 32, and the light beam incident from the incident lens 1 corresponding to the first combining element 31 may directly transmit through the beam splitter on the first combining element 31, where the two light beams are combined into one beam and directly exit from the exit lens 4. The light splitting sheet is adopted to play roles of reflection and transmission at the same time, the setting mode is simple, and the space of the wave combiner is saved, so that the volume of the wave combiner is reduced.

Alternatively, the incident lens 1 is a collimating lens; the exit lens 4 is a converging lens.

The incident lens 1 adopts a collimating lens to convert each light ray emitted to the incident lens 1 into a parallel collimated light beam, so that the combiner combines a plurality of incident light rays. Meanwhile, the emergent light can be accurately converged on the main optical axis of the emergent lens 4 by adopting the converging lens for the emergent lens 4 so as to facilitate the subsequent use of the synthetic light beam.

The embodiment of the utility model also discloses an optical module, which comprises a circuit board (not shown in the figure), a plurality of light sources (not shown in the figure) arranged on the circuit board side by side, and a wave combiner in the previous embodiment, wherein the wave combiner is arranged on the circuit board, and the plurality of light sources are arranged in one-to-one correspondence with a plurality of incidence lenses 1 of the wave combiner.

The multiple light sources are arranged in one-to-one correspondence with the multiple incidence lenses 1 of the combiner, so that multiple light beams incident to the combiner can be positioned on the same plane and kept stable. The structure and the beneficial effects of the wave combiner are described in detail in the foregoing embodiments, and are not described herein.

Further, the optical module is integrally packaged and formed. Specifically, in the embodiment of the utility model, the optical module is integrally packaged and formed by adopting epoxy resin, so that each component is highly integrated and permanently bonded with each other, and the reliability and stability of the optical module are improved.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A combiner, comprising: a plurality of incidence lenses, wave combining modules and emergent lenses which are arranged side by side; the incident lenses are respectively arranged corresponding to the wave combining modules, so that light rays incident from the incident lenses are respectively combined through the wave combining modules, and the combined light rays are emitted from the emergent lens.

2. The wave combiner of claim 1, wherein the exit lens corresponds to the incident lens at an edge, the wave combining module comprises a first wave combining element and a plurality of second wave combining elements, the first wave combining element and the plurality of second wave combining elements are arranged side by side along an arrangement direction of the incident lens, the first wave combining element and the plurality of second wave combining elements are respectively arranged in one-to-one correspondence with the plurality of incident lenses, the first wave combining elements are located on a main optical axis of the exit lens, and light incident on the second wave combining elements is reflected by the second wave combining elements and then exits after being reflected by the first wave combining elements, and light incident on the first wave combining elements is transmitted by the first wave combining elements and exits.

3. The combiner of claim 2, further comprising a plurality of optical isolators disposed in one-to-one correspondence with the plurality of entrance lenses, the optical isolators being located on a side of the entrance lenses from which light is emitted.

4. The combiner of claim 3, wherein the optical isolator comprises a first polarizer, a faraday rotator, and a second polarizer disposed in sequence, the first polarizer having a polarization direction at a predetermined angle from the second polarizer.

5. The combiner as recited in any one of claims 2-4, wherein a total reflection sheet is disposed on the second combiner corresponding to the incident lens at the other edge so as to totally reflect light incident on the second combiner.

6. The combiner of claim 5, wherein the second combiner and the first combiner are respectively provided with a beam splitter in the middle, so that a part of light incident on the beam splitter is transmitted.

7. The combiner of any one of claims 1-4, wherein the entrance lens is a collimating lens.

8. The combiner of any one of claims 1-4, wherein the exit lens is a converging lens.

9. An optical module, comprising a circuit board, a plurality of light sources arranged on the circuit board side by side, and the combiner according to any one of claims 1 to 8, wherein the combiner is arranged on the circuit board, and the plurality of light sources are arranged in one-to-one correspondence with a plurality of incident lenses of the combiner.

10. The light module of claim 9 wherein the light module is integrally molded.