CN111812778A - Wave combining and splitting device - Google Patents
Wave combining and splitting device Download PDFInfo
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- CN111812778A CN111812778A CN202010714083.6A CN202010714083A CN111812778A CN 111812778 A CN111812778 A CN 111812778A CN 202010714083 A CN202010714083 A CN 202010714083A CN 111812778 A CN111812778 A CN 111812778A
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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
- G02B6/29346—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 operating by wave or beam interference
- G02B6/29361—Interference filters, e.g. multilayer coatings, thin film filters, dichroic splitters or mirrors based on multilayers, WDM filters
- G02B6/29362—Serial cascade of filters or filtering operations, e.g. for a large number of channels
- G02B6/29365—Serial cascade of filters or filtering operations, e.g. for a large number of channels in a multireflection configuration, i.e. beam following a zigzag path between filters or filtering operations
- G02B6/29367—Zigzag path within a transparent optical block, e.g. filter deposited on an etalon, glass plate, wedge acting as a stable spacer
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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
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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
- G02B6/29395—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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- Optical Couplings Of Light Guides (AREA)
Abstract
The wavelength division multiplexing device provided by the embodiment of the application comprises two wavelength division components, a reflecting component and a light splitting component, wherein the light splitting component splits a multi-wavelength light beam into a first light beam and a second light beam, the first light beam is emitted to one of the wavelength division components, the second light beam is emitted to the reflecting component, the reflecting component reflects the second light beam to the other one of the wavelength division components, and the wavelength division components can split the first light beam and the second light beam into multiple paths of sub-wavelength light. The wavelength combining and splitting device is simple in structure.
Description
Technical Field
The application relates to the technical field of optical communication, in particular to a wavelength combining and splitting device.
Background
In an optical communication system, along with the increasing of the transmission capacity of the system, the application of wavelength multiplexing and demultiplexing in the packaging of optical devices is increasing, and particularly in a high-speed optical device, a light emitting device and a light receiving device use a multiplexer and a demultiplexer, the multiplexer combines multiple paths of sub-wavelength light into one path of multi-wavelength light beam, and the demultiplexer divides the one path of multi-wavelength light beam into multiple paths of sub-wavelength light with different wavelengths.
Disclosure of Invention
In view of this, the embodiments of the present application are expected to provide a wavelength multiplexing and demultiplexing device, which has a simple structure and is convenient to assemble, and in order to achieve the above beneficial effects, the technical solution of the embodiments of the present application is implemented as follows:
the embodiment of the application provides a device for combining and splitting waves, which comprises:
two wavelength division components;
a reflector; and
a light splitting member that splits a multi-wavelength light beam into a first light beam and a second light beam, the first light beam being emitted to one of the wavelength division elements, the second light beam being emitted to the reflecting member, the reflecting member reflecting the second light beam to the other of the wavelength division elements, the wavelength division elements being capable of splitting the first light beam and the second light beam into a plurality of sub-wavelength lights.
Furthermore, the wavelength combining and splitting device comprises a substrate, and the two wavelength splitting assemblies, the reflecting part and the light splitting part are passively attached to the substrate.
Further, the light splitting piece is a first optical filter;
and/or, two wavelength division components are arranged in an axisymmetric manner.
Furthermore, the wavelength division module comprises a substrate, a reflection part and a plurality of second optical filters, wherein the substrate is provided with a first end face and a second end face which are opposite, one of the reflection part and the second optical filters is positioned on the first end face, the other of the reflection part and the second optical filters is positioned on the second end face, the first light beam and the second light beam are reflected by the reflection part to enter the second optical filters, and the second optical filters divide the first light beam and the second light beam into a plurality of paths of sub-wavelength light.
Furthermore, the substrate is provided with a third end surface connecting the first end surface and the second end surface, and the third end surfaces of the two substrates are attached.
Further, one of the wavelength division components is a first wavelength division component, the other one of the wavelength division components is a second wavelength division component, the light splitting member is located on a second end face of the first wavelength division component, the multi-wavelength light beam enters the light splitting member from the first end face of the first wavelength division component, the first light beam enters the first wavelength division component, and the reflecting member reflects the second light beam to the second wavelength division component.
Furthermore, the reflector includes a first light incident surface, a first light emergent surface, a first reflecting surface and a second reflecting surface, the first reflecting surface is adjacent to the first light incident surface, the second reflecting surface is adjacent to the first light emergent surface, the second light beam enters the reflector through the first light incident surface, is reflected to the second reflecting surface through the first reflecting surface, and is emitted to the second wavelength division component from the first light emergent surface after being reflected by the second reflecting surface;
and/or the reflecting piece comprises a third reflecting surface, and the second light beam is reflected to the second wavelength division component by the third reflecting surface.
Furthermore, the wavelength multiplexing and demultiplexing device comprises a deflection prism, the deflection prism is located on a second end face of the second wavelength division component, and the deflection prism can deflect the second light beam by a preset angle and then guide the second light beam to the second wavelength division component.
Furthermore, the wavelength multiplexing and wavelength splitting device comprises a reflection structure, the reflection structure comprises a second light incident surface, a second light emergent surface, a fourth reflection surface and a fifth reflection surface, the second light incident surface is parallel to the second light emergent surface, the fourth reflection surface is parallel to the fifth reflection surface, the second light incident surface is adjacent to the fourth reflection surface, and the second light emergent surface is adjacent to the fifth reflection surface;
the first light beam enters the reflection structure through the second light incident surface, is reflected to the fifth reflection surface through the fourth reflection surface, and is emitted to the corresponding wavelength division component from the second light emitting surface after being reflected by the fifth reflection surface.
Further, the first light beam emitted from the reflecting structure is parallel to the second light beam emitted from the reflecting member;
and/or the reflecting structure is an oblique square prism, and two opposite parallel end faces of the oblique square prism are coated with films to form the fourth reflecting surface and the fifth reflecting surface.
The wavelength combining and splitting device provided by the embodiment of the application has a simple structure, a multi-wavelength light beam is firstly split into a first light beam and a second light beam, and then the first light beam and the second light beam are respectively demultiplexed by using the wavelength division components, so that the number of sub-wavelength lights with different wavelengths in a single wavelength division component can be effectively reduced, the insertion loss is avoided to be overlarge, the position of the wavelength division component can be flexibly adjusted by changing the light path of the second light beam by using the reflecting piece, and other optical devices can be conveniently arranged; therefore, the manufacturing precision requirement of the collimator is lower, and the yield of the wavelength combining and splitting device can be improved.
Drawings
Fig. 1 is a schematic structural diagram of a wavelength multiplexing and demultiplexing device according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of another wavelength multiplexing and demultiplexing device according to an embodiment of the present disclosure;
FIG. 3 is a schematic view of the wavelength multiplexing and demultiplexing device of FIG. 2 from another perspective;
fig. 4 is a schematic structural diagram of another wavelength multiplexing and demultiplexing device according to an embodiment of the present disclosure;
FIG. 5 is a schematic view of another view of the wavelength multiplexing and demultiplexing device shown in FIG. 4;
fig. 6 is a schematic structural diagram of another wavelength multiplexing and demultiplexing device according to an embodiment of the present application.
Description of the reference numerals
A wavelength division component 10; a first wavelength division element 10E; a second wavelength division component 10F; a substrate 11; the first end face 11 a; a second end face 11 b; a third end surface 11 c; a reflection section 12; a second filter 13; a reflective member 20; a first light incident surface 20 a; a first light emitting surface 20 b; a first reflecting surface 20 c; a second reflecting surface 20 d; a third reflecting surface 20 e; a light-splitting member 30; a deflection prism 40; a reflective structure 50; a fourth reflective surface 50 a; and a fifth reflective surface 50 b.
Detailed Description
It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application. The present application will now be described in further detail with reference to the accompanying drawings and specific examples.
Referring to fig. 1 to 6, an embodiment of the present application provides a wavelength multiplexing and demultiplexing device, which includes two wavelength multiplexing and demultiplexing components 10, a reflecting element 20, and a light splitting element 30. The light splitting member 30 splits the multi-wavelength light beam a into a first light beam B and a second light beam C. The first light beam B is emitted to one of the wavelength division elements 10, the second light beam C is emitted to the reflecting member 20, the reflecting member 20 reflects the second light beam C to the other one of the wavelength division elements 10, and the wavelength division element 10 can split the first light beam B and the second light beam C into a plurality of sub-wavelength lights D.
When the waves are divided, the multi-wavelength light beam a having different wavelengths enters the light dividing member 30, and the light dividing member 30 divides the multi-wavelength light beam a into the first light beam B and the second light beam C, i.e., the light dividing member 30 demultiplexes the multi-wavelength light beam a into the first light beam B and the second light beam C. The first light beam B is emitted to one of the wavelength division elements 10, and the corresponding wavelength division element 10 divides the first light beam B into a plurality of sub-wavelength lights D. The second light beam C is emitted to the reflecting member 20, enters another one of the wavelength division elements 10 by reflection of the reflecting member 20, and the corresponding wavelength division element 10 divides the second light beam C into multiple sub-wavelength lights D. Thus, the multi-wavelength light beam A is demultiplexed into multiple paths of sub-wavelength light D by the wavelength multiplexing and demultiplexing device.
Because the light path is reversible, when the wavelength division components 10 combine, the multiple sub-wavelength light D respectively combines the first light beam B and the second light beam C through the two wavelength division components 10, that is, the multiple sub-wavelength light D respectively multiplexes the first light beam B and the second light beam C through the two wavelength division components 10, the second light beam C is reflected by the reflecting member 20 to enter the light splitting member 30, and the first light beam B and the second light beam C combine the multiple wavelength light beam a through the light splitting member 30, that is, the first light beam B and the second light beam C multiplex the multiple wavelength light beam a through the light splitting member 30. Thus, the multi-path sub-wavelength light D is multiplexed into a multi-wavelength light beam A by the wavelength multiplexing/demultiplexing device
That is to say, the wavelength multiplexing and demultiplexing device provided in the embodiments of the present application can be used as a multiplexer (multiplexer) or a demultiplexer (demultiplexer) according to the needs of the optical communication system.
Generally, the multi-wavelength light beam a is collimated light, and the multi-wavelength light beam a is emitted from the collimator into the wavelength multiplexing/demultiplexing device, in the wavelength multiplexing/demultiplexing system, as the number of channels increases, the number of lights with different wavelengths in the multi-wavelength light beam a increases, which also increases the difficulty in manufacturing the collimator for collimating the multi-wavelength light beam a, and the difficulty in packaging the wavelength multiplexing/demultiplexing device also gradually increases, which also results in very low yield of the wavelength multiplexing/demultiplexing device, and thus the manufacturing cost of the wavelength multiplexing/demultiplexing device is very high. The wavelength multiplexing and demultiplexing device provided by the embodiment of the application has a simple structure, is suitable for multichannel wavelength division multiplexing and demultiplexing, firstly divides a multi-wavelength light beam A into a first light beam B and a second light beam C, and then respectively demultiplexes the first light beam B and the second light beam C by using the wavelength division component 10, can effectively reduce the number of sub-wavelength light D with different wavelengths in a single wavelength division component 10, has small insertion loss, can also reduce error accumulation among channels, has small optical path difference, has large optical path tolerance and strong displacement resistance. By changing the optical path of the second light beam C using the reflecting member 20, the position of the wavelength division module 10 can be flexibly adjusted, which facilitates the installation of other optical devices. Therefore, the manufacturing precision requirement of the collimator is lower, and the yield of the wavelength combining and splitting device can be improved.
It will be appreciated that the multi-wavelength beam a is a beam having a plurality of different wavelengths. The wavelengths of the light D are different for different sub-wavelengths. Specifically, the wavelength division element 10 is capable of splitting the first light beam B and the second light beam C into a plurality of sub-wavelength lights D of different wavelengths. The first light beam B comprises light of a different wavelength than the second light beam C. The first beam B and the second beam C are both collimated light.
In one embodiment, referring to fig. 1 to 6, the wavelength multiplexing/demultiplexing device includes a substrate. Two wavelength-splitting components 10, a reflecting element 20 and a light-splitting element 30 are passively attached to a substrate. Therefore, the packaging difficulty of the wave combining and splitting device is reduced, the process complexity is reduced, and the cost is effectively reduced.
In some embodiments, the position of the reflector can also be fine tuned during assembly using active coupling.
In an embodiment, referring to fig. 1 to 6, the light splitter 30 is a first filter. Specifically, the first filter is a band pass filter. The pass band of a bandpass filter corresponds to the wavelengths it transmits and reflects.
In order to further reduce the assembly difficulty of the wavelength division multiplexing device, in an embodiment, please refer to fig. 1 to 6, two wavelength division components 10 are disposed in an axisymmetric manner. Thus, the multi-path sub-wavelength light D light paths are symmetrical and parallel, the assembly difficulty of the wavelength division component 10 is reduced, and a collimator for collimating the sub-wavelength light is conveniently arranged after the two wavelength division components are arranged. The structure of the wave combining and splitting device is more compact, the size is smaller, the occupied space is smaller, and high-density integration is facilitated. Illustratively, two wavelength division components 10 are attached to a substrate, and after the position of one wavelength division component 10 is set on the substrate, the other wavelength division component 10 can be adjusted in position in one dimension according to the requirement. Therefore, the requirements of avoiding other optical structures and adjusting the wavelength division component 10 can be met, the assembly difficulty of the wavelength division component 10 can be reduced, the wavelength division component 10 can be quickly positioned and assembled, active coupling can be less performed in the assembly process, in addition, because the light paths of the multi-path sub-wavelength light D are symmetrical and parallel, the collimator for collimating the sub-wavelength light can be quickly positioned and assembled, the process complexity is reduced, and the cost is effectively reduced.
In an embodiment, referring to fig. 1 to 6, the wavelength division assembly 10 includes a substrate 11, a reflection portion 12, and a plurality of second filters 13. The substrate 11 has a first end face 11a and a second end face 11b opposed to each other. That is, the first end face 11a and the second end face 11b are opposite end faces of the substrate 11. One of the reflection part 12 and the second filter 13 is located on the first end surface 11a, and the other of the reflection part 12 and the second filter 13 is located on the second end surface 11 b. That is, the reflection part 12 may be located on the first end surface 11a, and the second filter 13 may be located on the second end surface 11 b. The second filter 13 may be located on the first end face 11a and the reflection part 12 may be located on the second end face 11 b. The first light beam B and the second light beam C are reflected by the reflection part 12 to enter the second filter 13, and the second filter 13 splits the first light beam B and the second light beam C into a plurality of paths of sub-wavelength light D. Therefore, the reflection times of partial different wavelengths of light in the multi-wavelength light beam A can be effectively reduced, the optical paths of the different wavelengths of light in the multi-wavelength light beam A are shorter, the insertion loss is avoided being overlarge, the error accumulation between channels can be reduced, the optical path difference is smaller, the optical path tolerance is larger, and the anti-displacement capacity is strong.
Taking 8 paths of sub-wavelength lights D with different wavelengths as an example, please refer to fig. 1, fig. 2, fig. 4 and fig. 6, the 8 paths of sub-wavelength lights D with different wavelengths are λ 1, λ 2, λ 3, λ 4, λ 5, λ 6, λ 7 and λ 8, respectively, since the wavelength division multiplexing is eight channels, each corresponding wavelength division component 10 may include four second filters 13.
When the waves are combined, λ 1, λ 2, λ 3 and λ 4 enter the substrate 11 of the corresponding wavelength division component 10 from the four second filters 13 of one wavelength division component 10, in the wavelength division component 10, λ 1 is reflected by the reflection part 12 and then multiplexed with λ 2 into λ 1+ λ 2, λ 1+ λ 2 is reflected by the reflection part 12 and then multiplexed with λ 3 into λ 1+ λ 2+ λ 3, λ 1+ λ 2+ λ 3 is reflected by the reflection part 12 and then multiplexed with λ 4 into λ 1+ λ 2+ λ 3+ λ 4, λ 1+ λ 2+ λ 3+ λ 4 is the first light beam B; the first light beam B λ 1+ λ 2+ λ 3+ λ 4 is emitted to the light splitting element 30. λ 5, λ 6, λ 7 and λ 8 enter the substrate 11 of the corresponding wavelength division component 10 from the four second filters 13 of another wavelength division component 10, in this wavelength division component 10, λ 5 is reflected by the reflection portion 12 and multiplexed with λ 6 into λ 5+ λ 6, λ 5+ λ 6 is reflected by the reflection portion 12 and multiplexed with λ 7 into λ 5+ λ 6+ λ 7, λ 5+ λ 6+ λ 7 is reflected by the reflection portion 12 and multiplexed with λ 8 into λ 5+ λ 6+ λ 7+ λ 8, and λ 5+ λ 6+ λ 7+ λ 8 is the second light beam C. The second light beam C λ 5+ λ 6+ λ 7+ λ 8 exits to the reflective member 20, and the reflective member 20 reflects the second light beam C λ 5+ λ 6+ λ 7+ λ 8 to the light splitting member 30. The light splitting member 30 multiplexes the first beam B λ 1+ λ 2+ λ 3+ λ 4 and the second beam C λ 5+ λ 6+ λ 7+ λ 8 into a multi-wavelength beam a λ 1+ λ 2+ λ 3+ λ 4+ λ 5+ λ 6+ λ 7+ λ 8.
During the wave division, the multi-wavelength light beam a λ 1+ λ 2+ λ 3+ λ 4+ λ 5+ λ 6+ λ 7+ λ 8 enters the light splitting component 30, and the light splitting component 30 demultiplexes the multi-wavelength light beam a λ 1+ λ 2+ λ 3+ λ 4+ λ 5+ λ 6+ λ 7+ λ 8 into a first light beam B λ 1+ λ 2+ λ 3+ λ 4 and a second light beam C λ 5+ λ 6+ λ 7+ λ 8. The first light beam B λ 1+ λ 2+ λ 3+ λ 4 enters one of the wavelength division components 10, in the wavelength division component 10, λ 1+ λ 2+ λ 3+ λ 4 is demultiplexed into λ 1+ λ 2+ λ 3 and λ 4 by the corresponding second optical filter 13, λ 4 is transmitted from the corresponding second optical filter 13, λ 1+ λ 2+ λ 3 is projected to the reflection part 12 by the corresponding second optical filter 13, and the reflection part 12 reflects λ 1+ λ 2+ λ 3 to the corresponding second optical filter 13; the corresponding second optical filter 13 demultiplexes λ 1+ λ 2+ λ 3 into λ 1+ λ 2 and λ 3, λ 3 is transmitted out of the corresponding second optical filter 13, λ 1+ λ 2 is projected to the reflection part 12 by the corresponding second optical filter 13, and the reflection part 12 reflects λ 1+ λ 2 to the corresponding second optical filter 13; the corresponding second optical filter 13 demultiplexes λ 1+ λ 2 into λ 1 and λ 2, λ 2 is transmitted from the corresponding second optical filter 13, λ 1 is projected to the reflection part 12 by the corresponding second optical filter 13, the reflection part 12 reflects λ 1 to the corresponding second optical filter 13, and the corresponding second optical filter 13 transmits λ 1. The second light beam C λ 5+ λ 6+ λ 7+ λ 8 enters another wavelength division component 10, in the wavelength division component 10, λ 5+ λ 6+ λ 7+ λ 8 is demultiplexed into λ 5, λ 6, λ 7 and λ 8 by four second optical filters 13 and is transmitted from the four second optical filters 13, respectively, and the principle of demultiplexing the second light beam C λ 5+ λ 6+ λ 7+ λ 8 by the wavelength division component 10 is the same as that of demultiplexing the first light beam B λ 1+ λ 2+ λ 3+ λ 4, and is not described herein again.
It should be noted that the wavelength division multiplexing/demultiplexing of different channels can be realized by increasing the number of the second filters 13 on the substrate 11. The plurality of second filters means that the number of the second filters is two or more, and for example, the number of the second filters 13 may be 2, 3, 4, 5, 8, 9, 10, 14, 16, or the like.
Specifically, the second filter 13 is a band pass filter, and the pass band and the cut-off band of the band pass filter correspond to the wavelengths transmitted and reflected by the band pass filter. Further, the projection of the base plate 11 on the substrate is in a parallelogram shape, such as a rectangle or a positive direction, in other words, the base plate 11 is in a hexahedral structure. Specifically, the substrate 11 includes, but is not limited to, a glass plate, a resin plate, and the like. The wavelength division component can be manufactured into a standard component on a production line, so that the manufacturing difficulty and the assembly difficulty of the wavelength combination and division device can be further reduced, and the assembly cost is reduced.
The assembly of the wavelength division assembly 10 can replace active coupling through passive mounting, and the process difficulty and the cost are effectively reduced. Specifically, the plurality of second filters 13 may be sequentially attached to the first end surface 11a or the second end surface 11b of the substrate 11 at intervals. That is, the plurality of second filters 13 may be distributed in a one-dimensional array. In some embodiments, the plurality of second filters 13 may each lie substantially in a plane parallel to the substrate. In other embodiments, the plurality of second filters 13 may all be located substantially in a plane perpendicular to the substrate.
In an embodiment, referring to fig. 1 to 6, the reflective portion 12 is a first reflective film or a first reflective film. That is, the reflective portion 12 may be formed by directly plating a film on the substrate 11, or a first reflective film may be attached to the substrate 11. Specifically, the reflection portion 12 may be integrally formed or a plurality of sub-reflection portions 12 may be combined. The first reflective film is a high reflective film.
In an embodiment, referring to fig. 1, fig. 2, fig. 4, fig. 5 and fig. 6, the substrate 11 has a third end surface 11c connecting the first end surface 11a and the second end surface 11 b. That is, opposite ends of the third end surface 11c are connected to the first end surface 11a and the second end surface 11b, respectively. The third end surfaces 11c of the two substrates 11 are bonded. It is to be understood that, since there are two wavelength division members 10, the substrate 11 of each wavelength division member 10 has the third end face 11c, and the number of the third end faces 11c is two. Thus, the two wavelength division assemblies 10 are assembled into a whole, so that the assembly difficulty can be further reduced, the structure is more compact, the size is smaller, the occupied space is smaller, and high-density integration is facilitated. Illustratively, two wavelength division components 10 bonded together are attached to a substrate during packaging.
In one embodiment, referring to fig. 1-5, one of the wavelength division components 10 is a first wavelength division component 10E, and the other wavelength division component 10 is a second wavelength division component 10F. The light splitting member 30 is located on the second end surface 11B of the first wavelength division component 10E, the multi-wavelength light beam a enters the light splitting member 30 from the first end surface 11a of the first wavelength division component 10E, the first light beam B enters the first wavelength division component 10E, and the reflecting member 20 reflects the second light beam C to the second wavelength division component 10F. The light splitting member 30 is disposed on the second end face 11b of the first wavelength division member 10E, which facilitates further reduction in assembly difficulty.
Specifically, the wavelength division member 30 is attached to the second end face 11b of the first wavelength division member 10E in a passive manner.
Note that, a portion of the first end surface 11a of the first wavelength division module 10E may be left vacant, that is, the reflection portion 12 is not provided, so that the multi-wavelength light beam a can enter the spectroscope 30 from the vacant portion of the first end surface 11a of the first wavelength division module 10E.
In one embodiment, referring to fig. 1 to 5, the reflective element 20 is located at a side of the first wavelength division component 10E where the second end surface 11b is located. The light splitter 30 is a first filter. Part of the multi-wavelength light beam A is transmitted through the first optical filter to form a second light beam C, and the other part of the multi-wavelength light beam A is reflected through the first optical filter to form a first light beam B.
In an embodiment, referring to fig. 1 to 5, the reflection portion 12 of the first wavelength division component 10E is located on the first end surface 11a of the first wavelength division component 10E, and the second optical filter 13 of the first wavelength division component 10E is located on the second end surface 11b of the first wavelength division component 10E. The reflection portion 12 of the second wavelength division element 10F is located on the first end face 11a of the second wavelength division element 10F, and the second filter 13 of the second wavelength division element 10F is located on the second end face 11b of the second wavelength division element 10F. The first filter is located on the second end face 11b of the first wavelength division component 10E. The reflecting member 20 is located on the side where the second end face 11b of the first wavelength division member 10E is located. The multi-wavelength light beam a enters the spectroscope 30 from the first end face 11a of the first wavelength division member 10E. Part of the multi-wavelength light beam A is transmitted through the first optical filter to form a second light beam C, and the other part of the multi-wavelength light beam A is reflected through the first optical filter to form a first light beam B. Thus, the second optical filter 13 and the first optical filter of the first wavelength division component 10E are both located on the second end surface 11b of the first wavelength division component 10E, which facilitates the positioning and assembly of the second optical filter 13 and the first optical filter of the first wavelength division component 10E. For example, after the first filter is assembled, the second filter 13 may be assembled according to a set distance between the first filter and the second filter 13.
In another embodiment, not shown, the reflection portion 12 of the first wavelength division component 10E is located on the second end face 11b of the first wavelength division component 10E, and the second optical filter 13 of the first wavelength division component 10E is located on the first end face 11a of the first wavelength division component 10E. The reflection portion 12 of the second wavelength division element 10F is located on the second end face 11b of the second wavelength division element 10F, and the second filter 13 of the second wavelength division element 10F is located on the first end face 11a of the second wavelength division element 10F. The first filter is located on the second end face 11b of the first wavelength division component 10E. The reflecting member 20 is located on the side where the second end face 11b of the first wavelength division member 10E is located. The multi-wavelength light beam a enters the spectroscope 30 from the first end face 11a of the first wavelength division member 10E. Part of the multi-wavelength light beam A is transmitted through the first optical filter to form a second light beam C, and the other part of the multi-wavelength light beam A is reflected through the first optical filter to form a first light beam B. With such a design, the reflector 20 is conveniently disposed on the side where the second end face 11b of the first wavelength division element 10E is located, so as to prevent the reflector 20 from interfering with the emission of the sub-wavelength light D, and meanwhile, other optical structures are conveniently disposed on the side where the second end face 11b of the first wavelength division element 10E is located.
In an embodiment, referring to fig. 4 and 5, the reflective element 20 includes a first light incident surface 20a, a first light emitting surface 20b, a first reflective surface 20c and a second reflective surface 20 d. The first reflecting surface 20C is adjacent to the first light incident surface 20a, the second reflecting surface 20d is adjacent to the first light emitting surface 20b, and the second light beam C enters the reflector 20 through the first light incident surface 20a, is reflected to the second reflecting surface 20d through the first reflecting surface 20C, and is emitted to the second wavelength division component 10F from the first light emitting surface 20b after being reflected by the second reflecting surface 20 d. So, utilize first plane of reflection 20C and second plane of reflection 20d, change second light beam C's light path, can reduce the distance between reflection 20 and the beam splitter 30 for the light path is shorter, and the optical path difference is littleer, and the light path tolerance is great simultaneously, and anti displacement ability is strong, makes the wavelength multiplexing and splitting device structure compacter, and the size is littleer, and the space that occupies is littleer, and the high density of being convenient for is integrated.
Specifically, the included angle between the plane of the first reflecting surface 20c and the plane of the second reflecting surface 20d is α, where α is greater than 0 ° and less than 90 °. Thus, the two wavelength division components 10 are located substantially on the same side of the reflecting member 20.
It should be noted that the first light incident surface 20a and the first light exiting surface 20b may be the same end surface of the reflector 20. Of course, the first light incident surface 20a and the first light exiting surface 20b may also be different end surfaces of the reflector 20.
In another embodiment, referring to fig. 1 to 3, the reflection element 20 includes a third reflection surface 20e, and the second light beam C is reflected to the second wavelength division element 10F by the third reflection surface 20 e. Thus, the reflecting member 20 has a simple structure, and the path of the second light beam C reflected by the reflecting member 20 is simple, thereby facilitating the control of the assembly among the wave sub-assembly 10, the reflecting member 20, and the light splitting member 30.
In one embodiment, referring to fig. 2 and 3, the wavelength multiplexing and demultiplexing device includes a deflection prism 40. The deflection prism 40 is located on the second end face 11b of the second wavelength division member 10F. The deflection prism 40 can deflect the second light beam C by a predetermined angle and guide the deflected light beam C to the second wavelength division element 10F. The second light beam C is deflected by a predetermined angle by the deflection prism 40, so that the position of the second wavelength division component 10F can be adjusted more flexibly as required. For example, since the second light beam C can be deflected by a predetermined angle by the deflection prism 40, the third end surface 11C of the first wavelength division component 10E and the third end surface 11C of the second wavelength division component 10F may be bonded, or the first wavelength division component 10E and the second wavelength division component 10F may be selected to be separated. In addition, the second optical filter 13 can be positioned by using the deflection prism 40, after the deflection prism 40 is arranged, the second optical filters 13 are only required to be pasted one by one according to the set position, active coupling assembly is not required, active coupling steps can be less performed in the assembly process, the process complexity is reduced, and the cost is effectively reduced.
In an embodiment, referring to fig. 2 and 3, the second light beam C is reflected to the second wavelength division component 10F by the third reflection surface 20e of the reflection member 20, and the optical path of the second light beam C can be changed by the deflection prism 40, so as to further facilitate the adjustment of the position of the wavelength division component 10.
In one embodiment, referring to fig. 6, the wavelength multiplexing and demultiplexing device includes a reflective structure 50. The reflection structure 50 includes a second light incident surface, a second light emitting surface, a fourth reflection surface 50a and a fifth reflection surface 50 b. The second light incident surface is parallel to the second light emergent surface, the fourth reflecting surface 50a is parallel to the fifth reflecting surface 50b, the second light incident surface is adjacent to the fourth reflecting surface 50a, and the second light emergent surface is adjacent to the fifth reflecting surface 50 b. The first light beam B enters the reflection structure 50 through the second light incident surface, is reflected to the fifth reflection surface 50B through the fourth reflection surface 50a, and is emitted to the corresponding wavelength division component 10 from the second light emitting surface after being reflected by the fifth reflection surface 50B. The optical path of the first light beam B is changed by the reflective structure 50, thereby facilitating flexible positioning of the wavelength division member 10 corresponding to the first light beam B.
In an embodiment, referring to fig. 6, the reflection portion 12 of the first wavelength division component 10E is located on the first end surface 11a of the first wavelength division component 10E, and the second optical filter 13 of the first wavelength division component 10E is located on the second end surface 11b of the first wavelength division component 10E. The reflection portion 12 of the second wavelength division element 10F is located on the first end face 11a of the second wavelength division element 10F, and the second filter 13 of the second wavelength division element 10F is located on the second end face 11b of the second wavelength division element 10F. The light splitter 30 is a first filter, a part of the multi-wavelength light beam a is reflected by the first filter to form a second light beam C, and another part of the multi-wavelength light beam a is transmitted by the first filter to form a first light beam B. The second light beam C is reflected by the reflector 20 to the second wavelength division component 10F, enters the reflection structure 50 through the second light incident surface, is reflected to the fifth reflection surface 50b through the fourth reflection surface 50a, and is emitted from the second light emitting surface to the first wavelength division component 10E after being reflected by the fifth reflection surface 50 b. With this design, the reflection structure 50, the light splitting element 30 and the reflection element 20 can be prevented from interfering with the emission of the multi-path sub-wavelength light D.
Specifically, the reflective member 20 and the reflective structure 50 are substantially located at two opposite sides of the first filter.
In one embodiment, referring to fig. 6, the first light beam B emitted from the reflective structure 50 is parallel to the second light beam C emitted from the reflective element 20. In this manner, rapid positioning and assembly of the wavelength division module 10 is facilitated.
In one embodiment, referring to fig. 6, the reflective structure 50 is a rhombic prism. The opposite parallel end faces of the rhombic prisms are coated to form a fourth reflection surface 50a and a fifth reflection surface 50 b. That is, the second reflective films are provided on the opposite parallel end faces of the rhombic prism.
In one embodiment, referring to FIG. 6, the distance between the two wavelength division components 10 can be adjusted by adjusting the size of the rhombic prism. Thereby adjusting the position of the wavelength division member 10.
In another embodiment, not shown, the reflective structure 50 may comprise two separate mirrors, one of which comprises the second entrance face and the fourth reflective face 50a, and the other of which comprises the third entrance face and the fifth reflective face 50 b. The optical path of the first light beam B is altered by the cooperation of two separate mirrors.
In another embodiment, the distance between the two wavelength division components 10 can be adjusted by adjusting the distance between the two mirrors. Thereby adjusting the position of the wavelength division member 10.
Illustratively, since the optical path of the light beam passing through the wavelength division module 10 can be determined after the wavelength division module 10 is assembled, if it is necessary to avoid other structures on the substrate when the wavelength division multiplexing device is packaged, the first wavelength division module 10E can be moved in parallel to a suitable position with reference to the well-positioned second wavelength division module 10F under the condition that the position of the second wavelength division module 10F is determined. In this case, the internal arrangement of the reflection structure 50, for example, the size of the rhombic prism or the distance between the two reflectors, can be adjusted according to a certain proportion, so that the wave combining and splitting device can be quickly assembled, active coupling can be performed less in the assembly process, the process complexity is reduced, and the cost is effectively reduced.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A wavelength multiplexing/demultiplexing device comprising:
two wavelength division components;
a reflector; and
a light splitting member that splits a multi-wavelength light beam into a first light beam and a second light beam, the first light beam being emitted to one of the wavelength division elements, the second light beam being emitted to the reflecting member, the reflecting member reflecting the second light beam to the other of the wavelength division elements, the wavelength division elements being capable of splitting the first light beam and the second light beam into a plurality of sub-wavelength lights.
2. The device according to claim 1, wherein the device comprises a substrate, and the two wavelength-splitting assemblies, the reflecting element and the light-splitting element are passively mounted on the substrate.
3. The wavelength multiplexing and demultiplexing device according to claim 1, wherein said optical splitter is a first filter;
and/or, two wavelength division components are arranged in an axisymmetric manner.
4. The wavelength multiplexing and demultiplexing device according to claim 1, wherein said wavelength demultiplexing module comprises a substrate, a reflecting portion and a plurality of second filters, said substrate having a first end surface and a second end surface opposite to each other, one of said reflecting portion and said second filters being located on said first end surface, the other of said reflecting portion and said second filters being located on said second end surface, said first light beam and said second light beam being reflected by said reflecting portion to enter said second filters, said second filters splitting said first light beam and said second light beam into a plurality of said sub-wavelength light beams.
5. The multiplexing and demultiplexing device according to claim 4, wherein said substrates have third end surfaces connecting said first end surface and said second end surface, and the third end surfaces of said two substrates are bonded.
6. The wavelength multiplexing and demultiplexing device according to claim 4, wherein one of said wavelength division elements is a first wavelength division element, and the other of said wavelength division elements is a second wavelength division element, said beam splitter being located at a second end surface of said first wavelength division element, said multi-wavelength light beam entering said beam splitter from a first end surface of said first wavelength division element, said first light beam entering said first wavelength division element, said reflector reflecting said second light beam to said second wavelength division element.
7. The wavelength multiplexing and demultiplexing device according to claim 6, wherein the reflector comprises a first light incident surface, a first light emergent surface, a first reflecting surface and a second reflecting surface, the first reflecting surface is adjacent to the first light incident surface, the second reflecting surface is adjacent to the first light emergent surface, the second light beam enters the reflector through the first light incident surface, is reflected to the second reflecting surface through the first reflecting surface, and is emitted from the first light emergent surface to the second wavelength division module after being reflected by the second reflecting surface;
and/or the reflecting piece comprises a third reflecting surface, and the second light beam is reflected to the second wavelength division component by the third reflecting surface.
8. The device according to claim 6, wherein the device comprises a deflection prism located on the second end surface of the second wavelength division component, and the deflection prism can deflect the second light beam by a predetermined angle and guide the second light beam to the second wavelength division component.
9. The wavelength multiplexing and demultiplexing device according to any one of claims 1 to 5, wherein said wavelength multiplexing and demultiplexing device comprises a reflection structure, said reflection structure comprises a second light incident surface, a second light emergent surface, a fourth reflection surface and a fifth reflection surface, said second light incident surface and said second light emergent surface are parallel, said fourth reflection surface and said fifth reflection surface are parallel, said second light incident surface and said fourth reflection surface are adjacent, and said second light emergent surface and said fifth reflection surface are adjacent;
the first light beam enters the reflection structure through the second light incident surface, is reflected to the fifth reflection surface through the fourth reflection surface, and is emitted to the corresponding wavelength division component from the second light emitting surface after being reflected by the fifth reflection surface.
10. The device according to claim 9, wherein the first light beam emitted from the reflecting structure is parallel to the second light beam emitted from the reflecting member;
and/or the reflecting structure is an oblique square prism, and two opposite parallel end faces of the oblique square prism are coated with films to form the fourth reflecting surface and the fifth reflecting surface.
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| CN202010714083.6A CN111812778A (en) | 2020-07-22 | 2020-07-22 | Wave combining and splitting device |
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| CN202010714083.6A CN111812778A (en) | 2020-07-22 | 2020-07-22 | Wave combining and splitting device |
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