CN111751931A - Small wavelength division multiplexer - Google Patents
Small wavelength division multiplexer Download PDFInfo
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- CN111751931A CN111751931A CN201910248472.1A CN201910248472A CN111751931A CN 111751931 A CN111751931 A CN 111751931A CN 201910248472 A CN201910248472 A CN 201910248472A CN 111751931 A CN111751931 A CN 111751931A
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- optical fiber
- block
- lens array
- array
- wavelength division
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- 239000013307 optical fiber Substances 0.000 claims abstract description 64
- 239000000758 substrate Substances 0.000 claims abstract description 28
- 239000011521 glass Substances 0.000 claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 description 10
- 239000000835 fiber Substances 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000003667 anti-reflective effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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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
Abstract
The invention discloses a small wavelength division multiplexer which comprises a Z-Block, a lens array and an optical fiber array, wherein the Z-Block, the lens array and the optical fiber array are sequentially arranged; the optical fiber array comprises a parallel substrate, a lens array, a right-angle prism, a Z-Block, a filter plate and a plurality of filter plates, wherein the parallel substrate is fixed on the end face of the parallel substrate far away from the lens array, when an incident beam enters the lens array from one optical fiber of the optical fiber array, the incident beam is collimated and enters the Z-Block, is refracted by an anti-reflection glass sheet on the Z-Block and enters the Z-Block, then is reflected to the filter plate on the Z-Block by the right-angle prism arranged on the other side, and the light beams with different wavelengths are sequentially output to the lens array by the plurality of filter plates and are coupled to the optical fiber array for output; the debugging is simpler, and the debugging efficiency is higher.
Description
Technical Field
The invention relates to the field of optical communication devices, in particular to a small wavelength division multiplexer.
Background
Wavelength division multiplexers are important passive optical devices in the field of optical communications. With the continuous increase of transmission capacity in the field of optical communication, the wavelength division multiplexing technology fully utilizes the advantage that the wavelength division multiplexing technology outputs different wavelengths of light in one optical fiber, so that the transmission capacity in one optical fiber is increased by several times or dozens of times, and the cost is greatly reduced. With the development of the technology in the whole communication industry, people pay more and more attention to the balance of performance price, so that telecom operators have higher and higher requirements on the size of the whole device, and thus more modules can be placed in a certain space.
Wavelength division multiplexers based on dielectric diaphragm technology have the advantage of stable performance and are therefore widely used in modern optical networks. By cascading the multi-channel and multi-port wavelength division multiplexing device of the three-port device, the optical fibers are coiled due to the fact that the incident port and the emergent port are welded for multiple times and a large space is needed. And the optical signal reflection of free space saves the optical fiber welding and reduces the loss at the same time. The incident and emergent light beams are both realized by the optical fiber collimator to realize the light beam collimation and the coupling scheme, and the optical fiber collimator is widely applied to the miniaturized wavelength division multiplexer, but is limited by the size of the optical fiber collimator, so that the size cannot be further optimized.
Since the demand of data centers for small wavelength division multiplexing devices is far beyond the imagination, it becomes important to reduce the size of the devices and to increase the transmission data per unit time.
Disclosure of Invention
Aiming at the situation of the prior art, the invention aims to provide a small wavelength division multiplexer which is compact in structure, convenient to expand and debug and high in efficiency.
In order to achieve the technical purpose, the invention adopts the technical scheme that:
a small wavelength division multiplexer comprises a Z-Block, a lens array and an optical fiber array which are sequentially arranged, wherein the Z-Block comprises a parallel substrate, a plurality of filter plates, a right-angle prism and an anti-reflection glass plate, and the filter plates and the anti-reflection glass plate are sequentially fixed on the end face, close to the lens array, of the parallel substrate in parallel; the rectangular prism is fixed on the end face of the parallel substrate far away from the lens array, wherein the filter plate is used for transmitting light beams with specific wavelengths and reflecting light beams with residual wavelengths, the lens array and the optical fiber array are bonded into a whole, when incident light beams enter the lens array from one optical fiber of the optical fiber array, the incident light beams are collimated and enter the Z-Block, are refracted by an anti-reflection glass sheet on the Z-Block and enter the Z-Block, then are reflected back to the filter plate on the Z-Block by the rectangular prism arranged on the other side, and output light beams with different wavelengths to the lens array in sequence through the plurality of filter plates and are coupled to the optical fiber array for output, wherein the incident light beams and the emergent light beams are input or output on the same side of the optical fiber array.
Further, the plurality of diaphragms on the Z-Block are composed of 4 filters and fixed on parallel substrates, and are used for separating 4 light beams with specific wavelengths.
Preferably, one side of the Z-Block, which is far away from the lens array, is plated with a reflective film, and the reflective film is used for reflecting light beams with 4 wavelengths and respectively emitting the light beams to corresponding filter sheets, and the rest of the reflective film can reflect light from the Com end back through a right-angle prism attached to one side of the Z-Block plated with the reflective film.
Furthermore, a plurality of light correction wedge angle pieces which are in one-to-one correspondence with the filter pieces are arranged between the Z-Block and the lens array and used when the parallelism of the output light beams of the Z-Block does not meet the preset requirement.
Preferably, the light correction wedge angle piece is a cylindrical light correction wedge angle piece or a square light correction wedge angle piece.
Preferably, the lens array is a 1 × 5 array, which is in one-to-one correspondence with the filter plate and the anti-reflection glass plate, and is used for collimating the incident light beam and focusing and coupling the emergent light beam.
Preferably, the optical fiber array is a 1x5 optical fiber array, and comprises a lower substrate with a V-shaped groove, 5 optical fibers and an upper substrate.
Preferably, 1 channel of the optical fiber array is used for transmitting an incident light beam, and the remaining 4 channels are used for transmitting an emergent light beam; or 4 channels for the transmission of the incident beam and the remaining one for the transmission of the outgoing beam.
Furthermore, the Z-Block, the lens array and the optical fiber array are all integrally arranged on a substrate.
Furthermore, a wedge angle block and a gasket are arranged between the lens array and the optical fiber array, and the lens array, the wedge angle block, the gasket and the optical fiber array are sequentially and fixedly connected into a whole.
Preferably, the Z-Block, lens array and fiber array may be arranged simultaneously on both sides of the substrate.
By adopting the technical scheme, compared with the prior art, the invention has the beneficial effects that: according to the scheme, by utilizing the combination of the Z-Block, the lens array and the optical fiber array and the characteristic of small size of the array, the incident light beam and the emergent light beam are simultaneously integrated on the optical fiber array on the same side, and the structure is reduced by half compared with the size distributed on different sides. In addition, the use of the array can realize the advantages of short adjusting time and high efficiency compared with the scheme of the optical fiber collimator, and the array also has the advantages of simple structure, smaller size, flexibility and easiness in expanding to more channels; meanwhile, the debugging is simpler, and the debugging efficiency is higher.
Drawings
The invention will be further elucidated with reference to the drawings and the detailed description:
fig. 1 is a schematic top view of a structure of an embodiment 1 of the small wavelength division multiplexer according to the present invention;
FIG. 2 is a schematic side view of the structure of an embodiment 1 of the small wavelength division multiplexer according to the present invention;
FIG. 3 is a 3-dimensional schematic diagram of the structure of embodiment 1 of the small wavelength division multiplexer according to the present invention;
FIG. 4 is a schematic top view of the structure of an embodiment 2 of the small wavelength division multiplexer according to the present invention;
FIG. 5 is a schematic side view of the structure of the small wavelength division multiplexer of embodiment 2 of the present invention;
FIG. 6 is a 3-dimensional schematic diagram of the structure of an embodiment 2 of the small wavelength division multiplexer according to the present invention;
fig. 7 is a schematic side view of a circular wedge and a square wedge in embodiment 2 of the small wavelength division multiplexer according to the present invention.
Detailed Description
Example 1
As shown in one of fig. 1 to 3, the structure of this embodiment includes a Z-Block10, a lens array 11, and an optical fiber array 14, which are sequentially arranged, where the Z-Block10 includes a parallel substrate 101, a plurality of filters 102, 103, 104, 105, a rectangular prism 107, and an anti-reflection glass sheet 106, and the plurality of filters 102, 103, 104, 105 and the anti-reflection glass sheet 106 are sequentially fixed side by side on an end surface of the parallel substrate 101 close to the lens array 11; the right-angle prism 107 is fixed on the end face of the parallel substrate 101 far away from the lens array 11, wherein the filters 102, 103, 104 and 105 are used for transmitting light beams with specific wavelengths and reflecting light beams with residual wavelengths, an angle wedge block 12 and a gasket 13 are further arranged between the lens array 11 and the optical fiber array 14, the lens array 11, the angle wedge block 12, the gasket 13 and the optical fiber array 14 are sequentially adhered together, and the gasket 13 is used for realizing that no glue exists in an optical path at a coupling position. When an incident light beam enters the lens array 11 from one optical fiber 145 of the optical fiber array 14, the incident light beam is collimated and enters the Z-Block10, and is reflected to the filters 102, 103, 104, 105 by the right-angle prism 107 on the other side after passing through the anti-reflection glass sheet 106 on the Z-Block10, the filters 102, 103, 104, 105 sequentially output light beams with different wavelengths to the lens array 11, and are coupled to the optical fibers 141, 142, 143, 144 of the optical fiber array 14 for output, and the Z-Block10, the lens array 11 and the optical fiber array 14 are all integrated on the same substrate 15, wherein the incident light beam and the emergent light beam are input or output on the same side of the optical fiber array 14.
An anti-reflection glass sheet 106 is adhered to the Z-Block10 of this embodiment, and pitch correction is performed on the parallel incident light beam so that the incident light beam is the same as the emergent light beam pitch. The Z-Block10 side was coated with a highly reflective film to reflect 4 wavelengths of light.
The output beam parallelism of the Z-Block10 of the embodiment is high, and 4 beams of light which can directly emit the output beam are coupled to the optical fiber array 14 through the lens array 11 and output. The lens array 11 shown in the present embodiment is a 1 × 5 array, and the implementation includes collimation of the incident light beam and focusing coupling of the emergent light beam.
The fiber array 14 of this embodiment is a 1x5 array, and includes a lower substrate 147 with V-grooves, 5 fibers 141, 142, 143, 144, 145, and an upper substrate 146. Where fiber 145 is used to transmit the incoming beam and fibers 141, 142, 143, 144 are used to transmit the outgoing fibers. It should be noted that the small wavelength division multiplexer according to the present invention can be used as a wavelength division Demultiplexer (DEMUX) or a wavelength division Multiplexer (MUX).
Example 2
As shown in one of fig. 4 to 7, the structure of this embodiment includes a Z-Block10, a lens array 11, and an optical fiber array 14, which are sequentially arranged, where the Z-Block10 includes a parallel substrate 101, a plurality of filters 102, 103, 104, 105, a rectangular prism 107, and an anti-reflection glass sheet 106, and the plurality of filters 102, 103, 104, 105 and the anti-reflection glass sheet 106 are sequentially fixed side by side on an end surface of the parallel substrate 101 close to the lens array 11; the right-angle prism 107 is fixed on the end face of the parallel substrate 101 far away from the lens array 11, wherein the filters 102, 103, 104 and 105 are used for transmitting light beams with specific wavelengths and reflecting light beams with residual wavelengths, an angle wedge block 12 and a gasket 13 are further arranged between the lens array 11 and the optical fiber array 14, the lens array 11, the angle wedge block 12, the gasket 13 and the optical fiber array 14 are sequentially bonded together, and the gasket 13 is used for realizing that no glue exists in an optical path at a coupling position; when an incident light beam enters the lens array 11 from one optical fiber 145 of the optical fiber array 14, the incident light beam is collimated and enters the Z-Block10, passes through the transmission glass sheet 106 on the Z-Block10 and is reflected to the filters 102, 103, 104 and 105 by the reflection right-angle prism 107 on the other side, the filters 102, 103, 104 and 105 sequentially output light beams with different wavelengths to the lens array 11 and are coupled to the optical fibers 141, 142, 143 and 144 of the optical fiber array 14 for output, and the Z-Block10, the lens array 11 and the optical fiber array 14 are all integrated on the same substrate 15, wherein the incident light beam and the emergent light beam are input or output on the same side of the optical fiber array 14.
The Z-Block10 bonded anti-reflective glass plate 106 of this example corrects the parallel incident beam for pitch so that the incident beam is the same as the emergent beam for pitch. The Z-Block10 side was coated with a highly reflective film to reflect 4 wavelengths of light.
When the parallelism of the output beams of the Z-Block10 of the embodiment is not high enough to meet the predetermined requirement, the 4 outgoing beams need to be added with the optical wedge correction pieces 17, 18, 19 and 110 to correct the spatial angles. Wherein the optical wedge 17, 18, 19, 110 is arranged between the Z-Block10 and the lens array, and the corrected light beam is coupled to the output of the optical fiber array 14 through the lens array 11. The lens array 11 and the optical fiber array 14 of this embodiment are the same as those of embodiment 1.
Referring to FIG. 6, the light correction wedge segments 17, 18, 19, 110 are shown as cylindrical 3-dimensional schematic views, cylindrical wedge segments, which can correct for any spatial angle. The side view of the round wedge angle piece and the square wedge angle piece is shown in figure 7, and the square wedge angle piece can correct 4 space angles.
It is noted that variations and modifications of the embodiments disclosed herein are possible, and that alternatives and equivalents of the various components of the embodiments are known to those of ordinary skill in the art. It will be clear to those skilled in the art that the present invention may be embodied in other forms, structures, arrangements, proportions, and with other characteristics, without departing from the spirit or essential characteristics thereof.
Claims (10)
1. A small wavelength division multiplexer, characterized in that: the optical fiber array comprises a Z-Block, a lens array and an optical fiber array which are sequentially arranged, wherein the Z-Block comprises a parallel substrate, a plurality of filter plates, a right-angle prism and an anti-reflection glass plate, and the filter plates and the anti-reflection glass plate are sequentially fixed on the end face, close to the lens array, of the parallel substrate in parallel; the rectangular prism is fixed on the end face of the parallel substrate far away from the lens array, the filter plate is used for transmitting light beams with specific wavelengths and reflecting light beams with residual wavelengths, the lens array is fixedly connected with the optical fiber array, when incident light beams enter the lens array from one optical fiber of the optical fiber array, the incident light beams are collimated and enter the Z-Block, the incident light beams enter the Z-Block through the anti-reflection glass sheet on the Z-Block, then the incident light beams are reflected back to the filter plate on the Z-Block by the rectangular prism arranged on the other side, the light beams with different wavelengths are sequentially output to the lens array through the plurality of filter plates and are coupled to the optical fiber array for output, and the incident light beams and the emergent light beams are input or output on the same side of the optical fiber array.
2. The miniature wavelength division multiplexer according to claim 1, wherein: the plurality of diaphragms on the Z-Block are composed of 4 filters and are fixed on parallel substrates, and the filters are used for separating 4 light beams with specific wavelengths.
3. The miniature wavelength division multiplexer according to claim 2, wherein: and one side of the Z-Block, which is far away from the lens array, is plated with a reflecting film.
4. The miniature wavelength division multiplexer according to claim 1, wherein: and a plurality of light correction wedge angle pieces which correspond to the filter pieces one by one are also arranged between the Z-Block and the lens array.
5. The miniature wavelength division multiplexer according to claim 4, wherein: the light correction wedge angle sheet is a cylindrical light correction wedge angle sheet or a square light correction wedge angle sheet.
6. The miniature wavelength division multiplexer according to claim 2, wherein: the lens array is a 1x5 array, which is respectively corresponding to the filter plate and the anti-reflection glass plate one by one and is used for collimating the incident light beam and focusing and coupling the emergent light beam.
7. The miniature wavelength division multiplexer according to claim 2, wherein: the optical fiber array is a 1x5 optical fiber array and comprises a lower substrate with V-shaped grooves, 5 optical fibers and an upper substrate.
8. The miniature wavelength division multiplexer according to claim 7, wherein: 1 channel of the optical fiber array is used for transmitting an incident beam, and the rest 4 channels are used for transmitting an emergent beam; or 4 channels for the transmission of the incident beam and the remaining one for the transmission of the outgoing beam.
9. The miniature wavelength division multiplexer according to claim 1, wherein: the Z-Block, the lens array and the optical fiber array are all integrated on a substrate.
10. The miniature wavelength division multiplexer according to claim 1, wherein: and a wedge angle block and a gasket are arranged between the lens array and the optical fiber array, and the lens array, the wedge angle block, the gasket and the optical fiber array are sequentially and fixedly connected into a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910248472.1A CN111751931A (en) | 2019-03-29 | 2019-03-29 | Small wavelength division multiplexer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910248472.1A CN111751931A (en) | 2019-03-29 | 2019-03-29 | Small wavelength division multiplexer |
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| CN111751931A true CN111751931A (en) | 2020-10-09 |
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| CN201910248472.1A Pending CN111751931A (en) | 2019-03-29 | 2019-03-29 | Small wavelength division multiplexer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113507036A (en) * | 2021-07-20 | 2021-10-15 | 武汉昱升光电股份有限公司 | Semiconductor optical amplifier and optical module |
| WO2021232494A1 (en) * | 2020-05-19 | 2021-11-25 | 福州高意通讯有限公司 | Small free-space wavelength division multiplexer |
| CN113985509A (en) * | 2021-10-18 | 2022-01-28 | 深圳市比洋光通信科技股份有限公司 | High-precision Z block optical filter gluing process technology |
| CN116449495A (en) * | 2022-01-06 | 2023-07-18 | 波若威科技股份有限公司 | Optical device |
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| US20130330080A1 (en) * | 2012-06-06 | 2013-12-12 | Innolight Technology (Suzhou) Ltd. | Wavelength Division Multiplexing/De-Multiplexing Optical Assembly for High Speed Parallel Long Distance Transmission |
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| CN106019484A (en) * | 2015-12-30 | 2016-10-12 | 杭州埃戈光电科技有限公司 | Wavelength division multiplexer capable of being integrated in CFP and CFP2 standard high-speed transceivers |
| CN206020720U (en) * | 2016-07-29 | 2017-03-15 | 苏州伽蓝致远电子科技股份有限公司 | Tight type ripple demultiplexer/tight type wavelength division multiplexer |
| CN106526753A (en) * | 2017-01-12 | 2017-03-22 | 中国计量大学 | Low-loss-type multichannel wavelength division multiplexer |
| CN206818914U (en) * | 2017-03-31 | 2017-12-29 | 上海中科创欣通讯设备有限公司 | Reflection-type wavelength division multiplexer based on film filtering slice |
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2019
- 2019-03-29 CN CN201910248472.1A patent/CN111751931A/en active Pending
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| CN201828684U (en) * | 2010-10-11 | 2011-05-11 | 福州高意通讯有限公司 | Arrayed collimator |
| US20130330080A1 (en) * | 2012-06-06 | 2013-12-12 | Innolight Technology (Suzhou) Ltd. | Wavelength Division Multiplexing/De-Multiplexing Optical Assembly for High Speed Parallel Long Distance Transmission |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021232494A1 (en) * | 2020-05-19 | 2021-11-25 | 福州高意通讯有限公司 | Small free-space wavelength division multiplexer |
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Application publication date: 20201009 |