CN114895407B - Wavelength division multiplexing assembly and device - Google Patents
Wavelength division multiplexing assembly and device Download PDFInfo
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- CN114895407B CN114895407B CN202210594184.3A CN202210594184A CN114895407B CN 114895407 B CN114895407 B CN 114895407B CN 202210594184 A CN202210594184 A CN 202210594184A CN 114895407 B CN114895407 B CN 114895407B
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- light
- division multiplexing
- wavelength division
- collimating lens
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/2938—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/29395—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device configurable, e.g. tunable or reconfigurable
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention discloses a wavelength division multiplexing component and a device, wherein the wavelength division multiplexing component comprises a wavelength division multiplexing module and a plurality of collimating lenses; the wavelength division multiplexing module comprises an optical substrate, a reflecting film and a plurality of optical filters, wherein the optical substrate is provided with a reflecting surface and a filtering surface which are oppositely arranged; the collimating lenses are arranged adjacent to the optical filters and correspond to the optical filters one by one along the light transmission direction; the wavelength division multiplexing component is configured to enable two paths of light rays which are symmetrical about the main optical axis of the collimating lens to enter each collimating lens from a side edge area which is deviated from the optical center of the collimating lens, and the two paths of light rays which enter each collimating lens are deflected by the collimating lens and then are emitted. The wavelength division multiplexing component and the wavelength division multiplexing device provided by the invention can realize double wavelength division multiplexing and de-multiplexing by only one wavelength division multiplexing module so as to achieve the effects of reducing the volume, improving the integration level and reducing the cost.
Description
Technical Field
The present invention relates to the field of optical communications technologies, and in particular, to a wavelength division multiplexing device and a wavelength division multiplexing assembly.
Background
In the prior art, two wavelength division multiplexing modules (Z-blocks) must be used to achieve dual wavelength division multiplexing/demultiplexing, which cannot meet the development of miniaturization and high density of optical modules.
Therefore, in view of the above-mentioned technical problems, it is necessary to provide a new wavelength division multiplexing module and device.
Disclosure of Invention
The invention aims to provide a wavelength division multiplexing assembly and a device, which can realize double wavelength division multiplexing and de-multiplexing through only one wavelength division multiplexing module.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
in a first aspect, the present invention provides a wavelength division multiplexing assembly comprising a wavelength division multiplexing module and a plurality of collimating lenses; the wavelength division multiplexing module comprises an optical substrate, a reflecting film and a plurality of optical filters, wherein the optical substrate is provided with a reflecting surface and a filtering surface which are oppositely arranged, the reflecting film is arranged on the reflecting surface of the optical substrate, and the optical filters are arranged on the filtering surface of the optical substrate; the collimating lenses are arranged adjacent to the optical filters and correspond to the optical filters one by one along the light transmission direction; the wavelength division multiplexing component is configured to enable two paths of light rays which are symmetrical about the main optical axis of the collimating lens to enter each collimating lens from a side edge area which is deviated from the optical center of the collimating lens, and the two paths of light rays which enter each collimating lens are deflected by the collimating lens and then are emitted.
In one or more embodiments, the reflective surface is parallel to the light filtering surface.
In one or more embodiments, a plurality of collimating lenses are arranged in an array along a direction parallel to the filtering surface, and a main optical axis of each collimating lens is perpendicular to the reflecting surface and the filtering surface.
In one or more embodiments, the distance from the optical center of the collimating lens to the filtering surface is equal to the focal length of the collimating lens.
In one or more embodiments, the optical substrate further has a first light entrance surface and a second light entrance surface, and the first light entrance surface and the second light entrance surface are respectively located at two sides of the reflective film.
In one or more embodiments, one of the two light rays entering each collimating lens enters or exits from the first light entrance surface, and the other light ray enters or exits from the second light entrance surface.
In one or more embodiments, an antireflection film is provided on each of the first light entrance surface and the second light entrance surface.
In one or more embodiments, the first light entrance face and the second light entrance face are in the same plane as the reflective face; or an included angle is formed between the first light access surface and the second light access surface and the reflecting surface, and the first light access surface and the second light access surface are inclined towards the filtering surface.
In a second aspect, the present invention provides a wavelength division multiplexing device comprising a wavelength division multiplexing assembly as described in any one of the preceding embodiments.
In one or more embodiments, the wavelength division multiplexing device further includes a light emitting device disposed corresponding to the collimating lens and/or a light receiving device disposed corresponding to the collimating lens.
Compared with the prior art, the wavelength division multiplexing component and the wavelength division multiplexing device provided by the invention have the advantages that the wavelength division multiplexing component is configured to enable two paths of light rays which are symmetrical about the main optical axis of the collimating lens to be emitted into each collimating lens from the side edge area deviating from the optical center of the collimating lens, and the two paths of light rays emitted into each collimating lens are emitted after being deflected by the collimating lens, so that the dual wavelength division multiplexing and the demultiplexing can be realized only through one wavelength division multiplexing module, and the effects of reducing the volume, improving the integration level and reducing the cost are achieved.
Drawings
Fig. 1 is a schematic structural diagram of a wavelength division multiplexing module according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a wavelength division multiplexing module according to another embodiment of the present invention;
fig. 3 is an optical path diagram of the wavelength division multiplexing module shown in fig. 1 when demultiplexed;
fig. 4 is an optical path diagram of the wavelength division multiplexing module shown in fig. 1 when multiplexed;
fig. 5 is an optical path diagram of the wavelength division multiplexing of fig. 1 when the components are demultiplexed and multiplexed at the same time.
The main reference numerals illustrate:
the optical system comprises a 1-wavelength division multiplexing module, an 11-optical substrate, a 12-reflecting film, a 13-optical filter, a 111-reflecting surface, a 112-optical filter surface, a 113-first light entrance surface, a 114-second light entrance surface and a 2-collimating lens.
Detailed Description
The following detailed description of embodiments of the invention is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
Referring to fig. 1 and 2, a wavelength division multiplexing module according to an embodiment of the invention includes a wavelength division multiplexing module 1 and a plurality of collimating lenses 2.
The wavelength division multiplexing module 1 has a structure similar to Z-block, and includes an optical substrate 11, a reflective film 12, and a plurality of optical filters 13. The optical substrate 11 has a reflection surface 111 and a filter surface 112 which are disposed opposite to each other, the reflection film 12 is provided on the reflection surface 111 of the optical substrate 11, and the plurality of filters 13 are provided on the filter surface 112 of the optical substrate 11.
The optical filters 13 can transmit light with a specific wavelength and reflect light with other wavelengths, and the optical filters 13 are sequentially arranged on the optical filtering surface 112 at intervals along the extending direction of the optical filtering surface 112.
The plurality of collimator lenses 2 are disposed adjacent to the plurality of filters 13 and correspond one-to-one to the plurality of filters 13 in the light transmission direction.
The wavelength division multiplexing module is configured to enable two paths of light rays symmetric about the main optical axis of the collimating lens 2 to enter each collimating lens 2 from a side edge area deviated from the optical center of the collimating lens 2, and the two paths of light rays entering each collimating lens 2 are deflected by the collimating lens 2 and then emitted.
In the present embodiment, the two paths of light rays are deflected by the respective collimator lenses 2 and then incident or emitted, and the dual wavelength division multiplexing and demultiplexing can be realized by only one wavelength division multiplexing module 1.
In an exemplary embodiment, the reflective surface 111 is disposed parallel to the filter surface 112. The collimating lenses 2 are arranged in an array along a direction parallel to the filtering surface 112, and the main optical axis of each collimating lens 2 is perpendicular to the reflecting surface 111 and the filtering surface 112.
Specifically, the distance from the optical center of the collimator lens 2 to the filter surface 112 is equal to the focal length of the collimator lens 2. In other words, the parallel light beam parallel to the main optical axis of the collimator lens 2 is directed to the collimator lens 2, and the intersection point of the refracted light beam refracted by the collimator lens 2 and the main optical axis is located on the light filtering surface 112.
Specifically, the collimator lens 2 may be a single plano-convex lens or a double-convex lens, or may be an array lens.
In an exemplary embodiment, the optical substrate 11 further has a first light entrance surface 113 and a second light entrance surface 114, where the first light entrance surface 113 and the second light entrance surface 114 are respectively located on two sides of the reflective film 12. One of the two light rays entering each collimator lens 2 enters or exits from the first light entrance surface 113, and the other light ray enters or exits from the second light entrance surface 114.
Specifically, the first light entrance surface 113 and the second light entrance surface 114 are each provided with an antireflection film.
Specifically, as shown in fig. 1, the first light entrance surface 113 and the second light entrance surface 114 are located on the same plane as the reflection surface 111.
In other embodiments, as shown in fig. 2, the first light entrance surface 113 and the second light entrance surface 114 may be disposed to form an angle with the reflecting surface 111, and the first light entrance surface 113 and the second light entrance surface 114 are inclined towards the filtering surface 112.
In an embodiment of the present invention, there is further provided a wavelength division multiplexing device, where the wavelength division multiplexing device includes a wavelength division multiplexing component according to any one of the foregoing embodiments.
In an exemplary embodiment, the wavelength division multiplexing device further includes a light emitting device provided corresponding to the collimator lens 2 and/or a light receiving device provided corresponding to the collimator lens 2. The light emitting device can emit light to the collimator lens 2, and the light receiving device can receive light emitted from the collimator lens 2. The light emitting devices may be fiber arrays, laser arrays, etc. The light receiving device may be an optical fiber array, a photodetector array, or the like.
Specifically, the wavelength division multiplexing device further includes an optical collimator corresponding to the first optical access surface 113 and the second optical access surface 114. The light collimator may collimate the light to the first light entrance surface 113 and the second light entrance surface 114, or may collimate the light emitted from the first light entrance surface 113 and the second light entrance surface 114.
The invention will be further illustrated with reference to specific examples.
Example 1
Referring to fig. 3, an optical path diagram of a wavelength division multiplexing module according to the present invention when performing DEMUX (demultiplexing) is shown. Two-way light (L) 1 、L 2 ) After being collimated by the light collimator, the light enters the optical substrate 11 from the first light entrance surface 113 and the second light entrance surface 114, respectively.
Wherein, the first path of light L 1 After entering the optical substrate 11, the first path of light L is emitted to the filter 13 positioned at the uppermost edge 1 Light of a specific wavelength is emitted from the filter 13 and then directed to the filter13, and is deflected by the collimator lens 2 and then emitted. At the same time, the first path of light L 1 The light of the remaining wavelengths is reflected by the filter 13 to the reflective film 12, and is reflected by the reflective film 12 to the next filter 13. The filter 13 transmits light of a specific wavelength to the corresponding collimator lens 2, and deflects and emits the light through the collimator lens 2. Meanwhile, the light of the remaining wavelengths is reflected by the filter 13 to the reflective film 12, and is reflected by the reflective film 12 to the next filter 13. And so on, after the multiple reflection and transmission, the first path of light L 1 Will be decomposed into multiple paths of emergent light with different wavelengths to reach the first path of light L 1 Is provided).
L 2
Similarly, the second path of light L 2 After entering the optical substrate 11, the light is directed to the filter 13 positioned at the lowermost edge,
L2
second path light L 2 Light of a specific wavelength is emitted from the filter 13, then directed to a side edge region of the collimator lens 2 corresponding to the filter 13, and deflected by the collimator lens 2, and then emitted. At the same time, the second path of light L 2 The light of the rest of wavelengths is reflected by the filter 13 to the reflective film 12, and is reflected by the reflective film 12 to the previous filter 13. The filter 13 transmits light of a specific wavelength to the corresponding collimator lens 2, and deflects and emits the light through the collimator lens 2. Meanwhile, the light of the remaining wavelengths is reflected by the filter 13 to the reflective film 12, and is reflected by the reflective film 12 to the previous filter 13. And so on, after the multiple reflection and transmission, the second path of light L 2 Will be decomposed into multiple paths of emergent light with different wavelengths to reach the second path of light L 2 Is provided).
It can be seen that in this embodiment, by the wavelength division multiplexing device provided by the present invention, dual wavelength division multiplexing can be implemented by only one wavelength division multiplexing module 1.
Example 2
Referring to fig. 4, an optical path diagram of the wavelength division multiplexing device according to the present invention when MUX (multiplexing) is performed simultaneously is shown. Multiple parallel rays (L) 1 、L 2 ) Dividing intoEach of the collimator lenses 2 is incident from a side edge region of each of the collimator lenses 2, and a plurality of parallel light rays (L 1 、L 2 ) After being deflected by the collimating lenses 2, the light beams respectively irradiate the filter plates at positive and negative angles with the same size. Light (L) 1 、L 2 ) The optical path in the optical substrate 11 may refer to the multiplexing process of Z-block.
Wherein, multipath light L 1 The light is transmitted and reflected by the filter and the reflecting film 12 to be combined into a path, and the path is emitted from the first light emitting surface; multipath ray L 2 The light is transmitted and reflected by the filter and the reflecting film 12 to be combined into a path, and the light is emitted from the second light emitting surface; so that a double multiplexing can be achieved by only one wavelength division multiplexing module 1.
Example 3
Referring to fig. 5, an optical path diagram of the wavelength division multiplexing module according to the present invention when performing MUX and DEMUX simultaneously is shown. One path of light L 1 After being collimated by the light collimator, the light enters the optical substrate 11 from the first light entrance surface 113. Multipath ray L 2 The light rays L are respectively incident into the collimating lenses 2 from the side edge regions of the collimating lenses 2 2 After being deflected by the collimating lenses 2, the light beams are respectively emitted to the filter plates. Light ray L 1 Reference is made to example 1 for the light path of light L 2 Reference is made to example 2.
Wherein, light L 1 Is separated into multiple paths of emergent light with different wavelengths to reach light L 1 Is a de-multiplexing of (2); multipath ray L 2 The light is transmitted and reflected by the filter and the reflecting film 12 to be combined into a path, and the light is emitted from the second light emitting surface; so that multiplexing and demultiplexing can be performed simultaneously by only one wavelength division multiplexing module 1.
In summary, the wavelength division multiplexing module and the wavelength division multiplexing device provided by the invention can enable two paths of light rays symmetrical about the main optical axis of the collimating lens 2 to be injected into each collimating lens 2 from the side edge area deviated from the optical center of the collimating lens 2, and the two paths of light rays injected into each collimating lens 2 are deflected by the collimating lens 2 and then are emitted, so that the dual wavelength division multiplexing and the demultiplexing can be realized only by one wavelength division multiplexing module 1, thereby achieving the effects of reducing the volume, improving the integration level and reducing the cost.
The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (6)
1. A wavelength division multiplexing assembly, comprising:
the wavelength division multiplexing module comprises an optical substrate, a reflecting film and a plurality of optical filters, wherein the optical substrate is provided with a reflecting surface and a filtering surface which are oppositely arranged, the reflecting film is arranged on the reflecting surface of the optical substrate, and the optical filters are arranged on the filtering surface of the optical substrate;
the collimating lenses are arranged adjacent to the optical filters and correspond to the optical filters one by one along the light transmission direction;
the wavelength division multiplexing component is configured to enable two paths of light rays which are symmetrical about the main optical axis of the collimating lens to enter each collimating lens from a side edge area which is deviated from the optical center of the collimating lens, and the two paths of light rays which enter each collimating lens are deflected by the collimating lens and then are emitted;
the optical substrate is also provided with a first light inlet and outlet surface and a second light inlet and outlet surface, and the first light inlet and outlet surface and the second light inlet and outlet surface are respectively positioned at two sides of the reflecting film;
one of the two paths of light rays entering each collimating lens enters or exits from the first light entrance face, and the other path of light rays enters or exits from the second light entrance face;
the first light access surface and the second light access surface are both provided with antireflection films, an included angle is formed between the first light access surface and the second light access surface and the reflecting surface, and the first light access surface and the second light access surface are inclined towards the filtering surface.
2. The wavelength division multiplexing assembly of claim 1 wherein the reflective surface is parallel to the filtering surface.
3. The wavelength division multiplexing assembly of claim 2, wherein a plurality of collimating lenses are arranged in an array in a direction parallel to the filtering surface, and a primary optical axis of each of the collimating lenses is perpendicular to the reflecting surface and the filtering surface.
4. A wavelength division multiplexing assembly according to claim 3 wherein the distance from the optical centre of the collimating lens to the filtering surface is equal to the focal length of the collimating lens.
5. A wavelength division multiplexing device comprising a wavelength division multiplexing assembly according to any one of claims 1 to 4.
6. The wavelength division multiplexing device of claim 5, further comprising a light emitting device disposed corresponding to the collimating lens and/or a light receiving device disposed corresponding to the collimating lens.
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| CN202210594184.3A CN114895407B (en) | 2022-05-27 | 2022-05-27 | Wavelength division multiplexing assembly and device |
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| CN202210594184.3A CN114895407B (en) | 2022-05-27 | 2022-05-27 | Wavelength division multiplexing assembly and device |
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| CN114895407B true CN114895407B (en) | 2023-05-23 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3120624U (en) * | 2006-02-01 | 2006-04-13 | オムロン株式会社 | Optical multiplexer / demultiplexer |
| JP2007322859A (en) * | 2006-06-02 | 2007-12-13 | Nippon Telegr & Teleph Corp <Ntt> | Optical multiplexer/demultiplexer |
| CN104880773A (en) * | 2015-05-26 | 2015-09-02 | 苏州旭创科技有限公司 | Wavelength division multiplexing demultiplexing device and optical module |
| CN205899074U (en) * | 2016-07-08 | 2017-01-18 | 武汉锐奥特科技有限公司 | Wavelength -division multiplexing optical device and wavelength -decomposition multiplexing optical device |
| CN208421303U (en) * | 2017-09-27 | 2019-01-22 | 上海中科创欣通讯设备有限公司 | Two-way integrates wavelength division multiplex device |
| CN111929769A (en) * | 2020-09-18 | 2020-11-13 | 武汉沃隆云网通信技术股份有限公司 | Multichannel wavelength division multiplexing module with compact structure |
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2022
- 2022-05-27 CN CN202210594184.3A patent/CN114895407B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3120624U (en) * | 2006-02-01 | 2006-04-13 | オムロン株式会社 | Optical multiplexer / demultiplexer |
| JP2007322859A (en) * | 2006-06-02 | 2007-12-13 | Nippon Telegr & Teleph Corp <Ntt> | Optical multiplexer/demultiplexer |
| CN104880773A (en) * | 2015-05-26 | 2015-09-02 | 苏州旭创科技有限公司 | Wavelength division multiplexing demultiplexing device and optical module |
| CN205899074U (en) * | 2016-07-08 | 2017-01-18 | 武汉锐奥特科技有限公司 | Wavelength -division multiplexing optical device and wavelength -decomposition multiplexing optical device |
| CN208421303U (en) * | 2017-09-27 | 2019-01-22 | 上海中科创欣通讯设备有限公司 | Two-way integrates wavelength division multiplex device |
| CN111929769A (en) * | 2020-09-18 | 2020-11-13 | 武汉沃隆云网通信技术股份有限公司 | Multichannel wavelength division multiplexing module with compact structure |
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