Wavelength division multiplexer and communication device

Abstract

The utility model discloses a wavelength division multiplexer and a communication device, and relates to the technical field of optical fiber communication. The wavelength division multiplexer comprises a separator, a light inlet module, a plurality of light outlet modules and an optical lens group, wherein the separator is provided with a first surface and a second surface which are arranged at an interval along a first direction; the light incoming module is connected to the first surface or the second surface of the separator, and the light incoming module is used for outputting a plurality of optical signals with different wavelengths; a part of the plurality of light emitting modules are connected to the first surface of the separator, a part of the light emitting modules are connected to the second surface of the separator, and the light emitting modules are used for outputting optical signals with corresponding wavelengths; the separator is connected with the optical lens group, and the optical lens group is used for guiding an optical signal output by the light inlet module to the corresponding light outlet module. The wavelength division multiplexer provided by the utility model is of a single-side fiber outlet structure, and is compact in structure, small in size and wider in application scene.

Description

Technical Field

[0001] The present application relates to the field of optical fiber communication technology, and in particular to a wavelength division multiplexer and a communication device. Background Art

[0002] Wavelength Division Multiplexer (WDM) is a commonly used device in optical communication systems. It can simultaneously transmit multiple optical signals of different wavelengths in the same optical fiber, thereby significantly improving the transmission capacity and efficiency of the optical fiber.

[0003] The wavelength division multiplexer in the related technology has double-sided fiber output, the product size is large, and the usage scenarios are limited. Utility Model Content

[0004] In view of this, the present application provides a wavelength division multiplexer and a communication device, aiming to solve one of the technical problems in the prior art.

[0005] To achieve the above objectives, the technical solutions adopted in this application are as follows:

[0006] In a first aspect, an embodiment of the present application provides a wavelength division multiplexer, comprising:

[0007] A separator having a first surface and a second surface spaced apart along a first direction;

[0008] an optical input module connected to the first surface or the second surface of the separator, the optical input module being configured to output a plurality of optical signals of different wavelengths;

[0009] a plurality of light output modules, some of which are connected to the first surface of the partition, and some of which are connected to the second surface of the partition, and the light output modules are used to output optical signals of corresponding wavelengths;

[0010] An optical lens assembly, wherein the separator is connected to the optical lens assembly, and the optical lens assembly is used to guide the optical signal output by the light input module to the corresponding light output module.

[0011] In one embodiment of the first aspect, the optical lens assembly includes a first prism, the first prism has a third surface parallel to the first direction, and the spacer is connected to the third surface of the first prism.

[0012] In one embodiment of the first aspect, the optical lens assembly further includes a second prism connected to a side of the first prism away from the separator. The second prism has:

[0013] a first reflecting surface;

[0014] The second reflecting surface, the first reflecting surface is perpendicular to the second reflecting surface, and the angle between the first reflecting surface and the second reflecting surface is toward the first prism.

[0015] In one embodiment of the first aspect, the first prism and the second prism are integrally formed; and / or

[0016] The cross section of the first prism is rectangular, and the cross section of the second prism is trapezoidal or triangular.

[0017] In one embodiment of the first aspect, the light output module includes:

[0018] a filter connected to the third surface;

[0019] A light-emitting collimator is connected to the partition.

[0020] In one embodiment of the first aspect, the filter has a filtering surface, which faces the third surface and is parallel to the third surface.

[0021] In one embodiment of the first aspect, the light output module further includes a light-transmitting colloid, the light-transmitting colloid is attached to the third surface of the first prism, and the filter is connected to a side of the light-transmitting colloid away from the first prism.

[0022] In one embodiment of the first aspect, the plurality of filters are spaced apart along a third direction, and the plurality of light output collimators provided on the first surface or the second surface are spaced apart along the third direction, and the third direction is perpendicular to the first direction.

[0023] In one embodiment of the first aspect, the light input module includes:

[0024] a deflecting prism connected to the third surface of the first prism;

[0025] An input light collimator, the output light collimator is connected to the partition, the input light collimator and the output light collimator are parallel and spaced apart along the third direction.

[0026] In a second aspect, an embodiment of the present application further provides a communication device, comprising the wavelength division multiplexer in any of the above embodiments.

[0027] Compared with the prior art, the beneficial effects of the present application are as follows: the present application proposes a wavelength division multiplexer, comprising a separator, an input light module, a plurality of output light modules and an optical lens group, wherein the separator has a first surface and a second surface spaced apart along a first direction; the input light module is connected to the first surface or the second surface of the separator, and the input light module is used to output a plurality of optical signals of different wavelengths; some of the plurality of output light modules are connected to the first surface of the separator, and some of the output light modules are connected to the second surface of the separator, and the output light modules are used to output optical signals of corresponding wavelengths; the separator is connected to the optical lens group, and the optical lens group is used to guide the optical signal output by the input light module to the corresponding output light module, so that the separator, the input light module and the plurality of output light modules are all arranged on the same side of the optical lens group, realizing single-sided fiber output of the wavelength division multiplexer, making the wavelength division multiplexer of the present application simple and compact in structure, small in size, and applicable to a wider range of scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 One of the structural schematic diagrams of a wavelength division multiplexer in some embodiments of the present application is shown;

[0030] Figure 2 The second structural diagram of the wavelength division multiplexer in some embodiments of the present application is shown;

[0031] Figure 3 The third structural diagram of the wavelength division multiplexer in some embodiments of the present application is shown.

[0032] Description of the main component symbols: 100-wavelength division multiplexer; D1-first direction; D2-second direction; D3-third direction;

[0033] 110-partitioning element; 111-first surface; 112-second surface; 120-optical lens assembly; 121-first prism; 1211-third surface; 122-second prism; 1221-first reflecting surface; 1222-second reflecting surface; 130-light output module; 131-filter; 132-light output collimator; 140-light input module; 141-deflecting prism; 142-light input collimator. DETAILED DESCRIPTION

[0034] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0035] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do 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 therefore should not be understood as a limitation on the present application.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0037] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0038] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0039] like Figure 1As shown, an embodiment of the present application provides a wavelength division multiplexer 100. The wavelength division multiplexer 100 includes a separator 110, an input light module 140, a plurality of output light modules 130 and an optical lens assembly 120.

[0040] Among them, the separator 110 is used to fix the light input module 140 and multiple light output modules 130. The separator 110 is also fixedly connected to the optical lens group 120. The separator 110 is connected to one side of the optical lens group 120, so that the light input module 140 and the light output module 130 of the wavelength division multiplexer 100 are both arranged on one side of the optical lens group 120, realizing single-sided fiber output, making the wavelength division multiplexer 100 of the present application compact in structure, small in size, and applicable to a wider range of scenarios.

[0041] like Figure 1 and Figure 2 As shown, the partition 110 has a first surface 111 and a second surface 112 spaced apart along the first direction D1 .

[0042] In some embodiments, the separator 110 is plate-shaped. The separator 110 is integrally formed from the same material to ensure uniform strength, thermal expansion coefficient, thermal conductivity, and other properties throughout the separator 110. This prevents the effects of thermal expansion between different materials, reduces deformation of the separator 110, and ensures more stable performance of the wavelength division multiplexer 100 at both high and low temperatures.

[0043] In this embodiment, the partition 110 is in a rectangular parallelepiped shape. In other embodiments, the shape of the partition 110 can be set as required.

[0044] In this embodiment, the first direction D1 is the thickness direction of the separator 110 , the second direction D2 is the width direction of the separator 110 , and the third direction D3 is the length direction of the separator 110 .

[0045] The light input module 140 is connected to the first surface 111 or the second surface 112 of the separator 110 . The light input module 140 is configured to output a plurality of optical signals of different wavelengths.

[0046] For example, Figure 1 As shown, the light incident module 140 is disposed on the first surface 111 .

[0047] Some of the multiple light output modules 130 are connected to the first surface 111 of the partition, and some are connected to the second surface 112 of the partition, so that the multiple light output modules 130 form a multi-level layout, making the structure of the wavelength division multiplexer 100 compact.

[0048] The optical output module 130 is used to output optical signals of corresponding wavelengths. For example, the optical input module 140 outputs optical signals having wavelengths λ1, λ2, and λ3, respectively. One output module is used to output the optical signal with wavelength λ1, one output module is used to output the optical signal with wavelength λ2, and one output module is used to output the optical signal with wavelength λ3.

[0049] Separator 110 is connected to optical lens assembly 120, which is used to direct the optical signal output by light input module 140 to the corresponding light output module 130. Multiple light output modules are spaced apart, meaning that modules outputting different wavelengths are positioned at different locations. By causing the optical signal to reflect multiple times within optical lens assembly 120, an optical signal of a certain wavelength is output from the corresponding light output module.

[0050] In some embodiments, the optical lens assembly 120 includes a first prism 121 . The first prism 121 has a third surface 1211 parallel to the first direction D1 . The spacer 110 is connected to the third surface 1211 of the first prism 121 .

[0051] like Figure 2 and 3 As shown, the first prism 121 is in a rectangular parallelepiped shape, and the optical signal is transmitted between the two layers of light output modules 130 .

[0052] In some embodiments, the optical lens assembly 120 further includes a second prism 122 . The second prism 122 is connected to a side of the first prism 121 away from the partition. The second prism 122 has a first reflective surface 1221 and a second reflective surface 1222 .

[0053] The first reflecting surface 1221 is perpendicular to the second reflecting surface 1222 , and the angle between the second reflecting surface 1222 and the second reflecting surface 1222 is toward the first prism 121 .

[0054] like Figure 2 As shown, the top edge of the first reflecting surface 1221 is connected to the top edge of the first prism 121, and the bottom edge is set in a direction away from the first prism 121; the bottom edge of the second reflecting surface 1222 is connected to the bottom edge of the first prism 121, and the top edge is set in a direction away from the first prism 121. In this way, all light signals passing through the first prism 121 can enter the second prism 122 and be reflected by the first reflecting surface 1221 and the second reflecting surface 1222.

[0055] In some embodiments, the first prism 121 and the second prism 122 are integrally formed; and / or the cross section of the first prism 121 is rectangular, and the cross section of the second prism 122 is trapezoidal or triangular.

[0056] For example, when the first prism 121 and the second prism 122 are integrally formed, the optical lens assembly 120 uses a roof prism.

[0057] When the first prism 121 and the second prism 122 are separately provided, the first prism 121 and the second prism 122 can be directly spliced ​​(for example, bonded) or the first prism 121 and the second prism 122 can be spaced apart to form the optical lens assembly 120 .

[0058] When the first prism 121 and the second prism 122 are spaced apart, the light signal enters and leaves the first prism 121 , passes through the air or some medium, and finally enters the second prism 122 , thereby extending the light path.

[0059] In some embodiments, a first intersection line is formed at the intersection of the first reflective surface 1221 and the second reflective surface 1222. The first intersection line is parallel to the center line of the third surface 1211 along the second direction D2. Furthermore, in the first direction D1, the perpendicular distance between the first surface 111 and the center line of the third surface 1211 is equal to the perpendicular distance between the second surface 112 and the center line of the third surface 1211. This allows the placement of the partition 110 to correspond to the center of the optical path of the optical lens assembly 120.

[0060] In some embodiments, the light output module 130 includes a filter 131 and a light output collimator 132 .

[0061] The filter 131 is connected to the third surface 1211. The filter 131 has a filtering surface (not shown) facing the third surface 1211 and parallel to the third surface 1211. The filtering surface is used to transmit light signals of a certain wavelength and reflect light signals of other wavelengths.

[0062] In some embodiments, the lamination process between the filter surface of the filter 131 and the third surface 1211 reduces the verticality requirement between the filter surface and the side surface during the manufacture of the filter 131, reduces the production accuracy of the filter, and makes the filter 131 easier to mass-produce.

[0063] The light output collimator 132 is connected to the partition 110 , and is used to receive light projected by the corresponding filter 131 .

[0064] In some embodiments, the light output module 130 further includes a light-transmitting colloid (not shown). The light-transmitting colloid is attached to the third surface 1211 of the first prism 121 , and the filter 131 is connected to a side of the light-transmitting colloid away from the first prism 121 .

[0065] By providing a translucent colloid, the light signal is transmitted into the translucent colloid. The translucent colloid can shorten the optical path. By making the filter surface of the filter 131 fit with the translucent colloid, the influence of the side sag of the filter can be reduced, so that the light reflected by the filter 131 is equivalent to being reflected by a mirror, and no additional superimposed angle transmission is performed.

[0066] In some embodiments, the plurality of filters 131 are spaced apart along the third direction D3.

[0067] like Figure 1 As shown, the multiple filters 131 are arranged in two layers, and the multiple filters 131 in each layer are arranged at intervals along the third direction D3.

[0068] The plurality of light output collimators 132 disposed on the first surface 111 or the second surface 112 are spaced apart along the third direction D3 , thereby reducing the difficulty of assembling the wavelength division multiplexer 100 .

[0069] In some embodiments, the light input module 140 includes a deflection prism 141 and a light input collimator 142 .

[0070] The deflecting prism 141 is used to adjust the angle of incident light.

[0071] The deflecting prism 141 is connected to the third surface 1211 of the first prism 121 . The light output collimator 132 is connected to the partition 110 . The light input collimator 142 and the light output collimator 132 are parallel and spaced apart along the third direction D3 .

[0072] The deflecting prism 141 is an oblique prism, so that the incident light collimator 142 remains parallel to other collimators, which is convenient for packaging and use.

[0073] In order to place the input light collimator 142 and the output light collimator 132 in the wavelength division multiplexer 100 in parallel, a deflection prism 141 for adjusting the incident light angle is provided between the input light collimator 142 and the optical path of the first prism 121 .

[0074] The deflecting prism 141 is fixed to the third surface 1211 of the first prism 121. The vertex angle of the deflecting prism 141 is designed to be β, so that the light beam passing through the deflecting prism 141 and the optical lens assembly 120 is incident on the first filter 131 at α, where α is the design value of the incident angle of the filter 131.

[0075] The wavelength division multiplexing principle of the wavelength division multiplexer 100 of the present application is as follows:

[0076] The light enters the light collimator 142 and enters the rhombus prism, which refracts the light into the optical lens assembly 120 and reflects it to the filter 131 on another layer.

[0077] The light of the corresponding wavelength is transmitted to the collimator on the rear side of the filter 131, and the light of other wavelengths is reflected back to the optical lens assembly 120 and transmitted to another layer of the filter 131;

[0078] The light of the corresponding wavelength is then transmitted to the collimator on the rear side of the filter 131, and the light of the remaining wavelength is reflected back to the optical lens assembly 120. As described above, the light of different wavelengths is sequentially emitted from the upper and lower layers to achieve wavelength division multiplexing.

[0079] The present application also provides a communication device, including the wavelength division multiplexer 100 in any of the above embodiments. Therefore, it has all the beneficial effects of the wavelength division multiplexer 100 in any of the above embodiments, which will not be described in detail here.

[0080] The communication devices in this application refer to servers, storage devices, network devices, broadcasting, TV set-top boxes and 5G base stations.

[0081] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0082] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A wavelength division multiplexer, characterized in that: include: A separator having a first surface and a second surface spaced apart along a first direction; an optical input module connected to the first surface or the second surface of the separator, the optical input module being configured to output a plurality of optical signals of different wavelengths; a plurality of light output modules, some of which are connected to the first surface of the partition, and some of which are connected to the second surface of the partition, and the light output modules are used to output optical signals of corresponding wavelengths; An optical lens assembly, wherein the separator is connected to the optical lens assembly, and the optical lens assembly is used to guide the optical signal output by the light input module to the corresponding light output module.

2. The wavelength division multiplexer according to claim 1, wherein: The optical lens assembly includes a first prism, wherein the first prism has a third surface parallel to the first direction, and the spacer is connected to the third surface of the first prism.

3. The wavelength division multiplexer according to claim 2, wherein: The optical lens assembly further includes a second prism connected to a side of the first prism away from the partition. The second prism has: a first reflecting surface; The second reflecting surface, the first reflecting surface is perpendicular to the second reflecting surface, and the angle between the first reflecting surface and the second reflecting surface is toward the first prism.

4. The wavelength division multiplexer according to claim 3, wherein: The first prism and the second prism are integrally formed; and / or The cross section of the first prism is rectangular, and the cross section of the second prism is trapezoidal or triangular.

5. The wavelength division multiplexer according to any one of claims 2 to 4, characterized in that: The light output module includes: a filter connected to the third surface; A light-emitting collimator is connected to the partition.

6. The wavelength division multiplexer according to claim 5, characterized in that: The filter has a filtering surface, which faces the third surface and is parallel to the third surface.

7. The wavelength division multiplexer according to claim 6, wherein: The light output module further includes a light-transmitting colloid, which is attached to the third surface of the first prism. The filter is connected to a side of the light-transmitting colloid away from the first prism.

8. The wavelength division multiplexer according to claim 6, wherein: The plurality of filters are arranged at intervals along a third direction, and the plurality of light output collimators provided on the first surface or the second surface are arranged at intervals along the third direction, and the third direction is perpendicular to the first direction.

9. The wavelength division multiplexer according to claim 8, characterized in that: The light input module includes: a deflecting prism connected to the third surface of the first prism; An input light collimator, the output light collimator is connected to the partition, the input light collimator and the output light collimator are parallel and spaced apart along the third direction.

10. A communication device, characterized in that: A wavelength division multiplexer comprising the wavelength division multiplexer according to any one of claims 1 to 9.

Images