CN110927883A - Small-sized wavelength division multiplexer - Google Patents
Small-sized wavelength division multiplexer Download PDFInfo
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- CN110927883A CN110927883A CN201811118577.7A CN201811118577A CN110927883A CN 110927883 A CN110927883 A CN 110927883A CN 201811118577 A CN201811118577 A CN 201811118577A CN 110927883 A CN110927883 A CN 110927883A
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- optical fiber
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- wavelength division
- lens array
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- 239000013307 optical fiber Substances 0.000 claims abstract description 50
- 239000000758 substrate Substances 0.000 claims abstract description 34
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 239000012528 membrane Substances 0.000 abstract description 17
- 239000000835 fiber Substances 0.000 description 26
- 230000003287 optical effect Effects 0.000 description 10
- 239000011295 pitch Substances 0.000 description 9
- 238000004891 communication Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000004568 cement Substances 0.000 description 1
- 230000010354 integration 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
-
- 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
- G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention discloses a small wavelength division multiplexer which comprises a single optical fiber collimator, a Z-Block, a lens array and an optical fiber array, wherein the Z-Block comprises a parallel substrate and a plurality of membranes fixed on the parallel substrate, the membranes transmit specific wavelengths and reflect light with residual wavelengths to the next membrane, the lens array is arranged between the Z-Block and the optical fiber array, light beams emitted from the Z-Block are coupled to the optical fiber array through the lens array, and the single optical fiber collimator, the Z-Block, the lens array and the optical fiber array are arranged on the same substrate. Compared with the prior art, the invention has the advantages of simple structure, smaller size, flexibility and easy expansion to more channels. Meanwhile, 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 can be 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 realize a small-size wavelength division multiplexing device by using a small-size array by combining a single optical fiber collimator, a Z-Block, a lens array and an optical fiber array. In addition, the use of the array can realize the advantages of shorter adjustment time and higher efficiency than the optical fiber collimator scheme.
In order to achieve the technical purpose, the invention adopts the technical scheme that:
a small wavelength division multiplexer comprises a single optical fiber collimator, a Z-Block, a lens array and an optical fiber array, wherein the Z-Block comprises a parallel substrate and a plurality of membranes fixed on the parallel substrate, the membranes can transmit specific wavelengths and reflect light with residual wavelengths to the next membrane, the lens array is installed between the Z-Block and the optical fiber array, light beams emitted from the Z-Block are coupled to the optical fiber array through the lens array, and the single optical fiber collimator, the Z-Block, the lens array and the optical fiber array are on the same substrate.
Further, the plurality of diaphragms are composed of 4 filters, and can output 4 wavelengths λ 1, λ 2, λ 3, λ 4.
Furthermore, an antireflection film is plated on the incident light side of the Z-Block at the incident light inlet, and a high reflection film is plated on the other positions of the incident light side for the wavelength of the light reflected by the diaphragm. Therefore, the incident light beams firstly pass through the anti-reflection window, and then the light beams with 4 wavelengths are sequentially output from the diaphragm.
Furthermore, the parallelism of the 4 membranes adhered to the Z-Block is high, so that the parallelism of the output 4 beams of light is correspondingly high, and a lens array is directly added between the membranes and the optical fiber array for coupling.
And further, when the parallelism of the 4 membranes adhered to the Z-Block does not meet the preset requirement, adding a light correction wedge angle sheet between the Z-Block and the lens array to correct the spatial angle of the output light beam.
Furthermore, the light correction wedge angle piece is a cylindrical or square wedge angle piece.
Further, the lens array is a 1 × 4 array with pitches consistent with the 4 patch pitches on Z-Block.
Further, the fiber array is a 1x4 array with pitch in line with the lens array.
Further, the optical fiber array comprises a lower substrate with a V-shaped groove, 4 optical fibers and an upper substrate.
Further, the lens array and the optical fiber array can be bonded together by optical cement, that is, the optical path is glued.
Further, the lens array and the optical fiber array are indirectly bonded together through the substrate, namely, the optical path is in a glue-free mode.
Further, the lens array is separated from the optical fiber array, that is, the lens array and the optical fiber array are adhered to the substrate together, and air is filled in the middle.
Furthermore, the single optical fiber collimator, the Z-Block, the lens array and the optical fiber array are simultaneously arranged on two sides of the substrate.
Compared with the prior art, the structure 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 schematic top view of the structure of an embodiment 2 of the small wavelength division multiplexer according to the present invention;
FIG. 4 is a schematic side 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 an embodiment 3 of the small wavelength division multiplexer according to the present invention;
fig. 6 is a schematic structural side view of a small wavelength division multiplexer according to embodiment 4 of the present invention.
Detailed Description
Example 1
As shown in fig. 1 and 2, the present embodiment includes a single fiber collimator 13, a Z-Block10, a lens array 11 and a fiber array 12, the Z-Block10 includes a parallel substrate 101 and a plurality of membranes 102, 103, 104, 105 fixed on the parallel substrate 101, the membranes 102, 103, 104, 105 are fixed on the same side of the parallel substrate 101 and can transmit light with specific wavelength and reflect light with the rest wavelength to the next membrane, the lens array 11 is installed between the Z-Block10 and the fiber array 12, the light beam emitted from the Z-Block10 is coupled to the fiber array 12 through the lens array 11, and the single fiber collimator 13, the Z-Block10, the lens array 11 and the fiber array 12 are on the same substrate 14.
The diaphragms 102, 103, 104, 105 are composed of 4 filters, and can output 4 wavelengths λ 1, λ 2, λ 3, λ 4. The incident light side of the Z-Block10 is coated with an antireflection film at the incident light inlet, and the rest positions of the incident light side are coated with a high reflection film for the wavelength of the light reflected by the diaphragm. This allows the incident beam to pass through the anti-reflection window and then output the 4 wavelengths of light sequentially from the diaphragms 102, 103, 104, 105. The incident light inlet of the Z-Block10 is provided with a single fiber collimator 13, and the incident light beam is coupled in through the optical fiber of the single fiber collimator 13 and is output to the anti-reflection window of the Z-Block10 from the single fiber collimator 13. The parallelism of 4 diaphragms 102, 103, 104 and 105 adhered on the same side of the parallel substrate 101 is high, so that the parallelism of the output 4 beams of light is correspondingly high, and the lens array 11 is directly added between the diaphragms 102, 103, 104 and 105 and the optical fiber array 12 for coupling. The lens array 11 is a 1x4 array with pitches consistent with the 4 patch pitches of Z-Block 10. The fiber array 12 is a 1x4 array with its pitch in line with the lens array 11. The optical fiber array 12 includes a lower substrate 122 with V-grooves, 4 optical fibers 123, and an upper substrate 121. 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 fig. 3 and 4, the present embodiment includes a single fiber collimator 13, a Z-Block10, a lens array 11 and a fiber array 12, a Z-Block10 includes a parallel substrate 101 and a plurality of membranes 102, 103, 104, 105 fixed on the parallel substrate 101, the membranes 102, 103, 104, 105 are fixed on the same side of the parallel substrate 101 and can transmit light with specific wavelength and reflect light with the rest wavelength to the next membrane, and also includes a lens array 11 and a fiber array 12, the lens array 11 is installed between the Z-Block10 and the fiber array 12, the light beam emitted from the Z-Block10 is coupled to the fiber array 12 through the lens array 11, and the single fiber collimator 13, the Z-Block10, the lens array 11 and the fiber array 12 are on the same substrate 14.
The diaphragms 102, 103, 104, 105 are composed of 4 filters, and can output 4 wavelengths λ 1, λ 2, λ 3, λ 4. The incident light side of the Z-Block10 is coated with an antireflection film at the incident light inlet, and the rest positions of the incident light side are coated with a high reflection film for the wavelength of the light reflected by the diaphragm. This allows the incident beam to pass through the anti-reflection window and then output the 4 wavelengths of light sequentially from the diaphragms 102, 103, 104, 105. The incident light inlet of the Z-Block10 is provided with a single fiber collimator 13, and the incident light beam is coupled in through the optical fiber of the single fiber collimator 13 and is output to the anti-reflection window of the Z-Block10 from the single fiber collimator 13. When the parallelism of 4 output 4 beams of light is not high due to the fact that parallelism of 4 membranes 102, 103, 104 and 105 adhered to the same side of a parallel substrate 101 is not high or the parallelism of the output 4 beams of light cannot meet the requirement due to other reasons, optical correction wedge angle pieces 15, 16, 17 and 18 are added between the membranes 102, 103, 104 and 105 and a lens array 11 to correct the spatial angle of the output beam of Z-Block10, so that the output beam is coupled to an optical fiber array 12 after passing through the lens array 11. The light correction wedge pieces 15, 16, 17 and 18 are placed on the wedge piece cushion block 19, and the light correction wedge pieces 15, 16, 17 and 18 can be cylindrical or square. The lens array 11 is a 1x4 array with pitches consistent with the 4 patch pitches of Z-Block 10. The fiber array 12 is a 1x4 array with its pitch in line with the lens array 11. The optical fiber array 12 includes a lower substrate 122 with V-grooves, 4 optical fibers 123, and an upper substrate 121.
Example 3
As shown in fig. 5, this embodiment is based on embodiment 1, and the only difference from embodiment 1 is that this embodiment adds a MUX module on the other side of the substrate 14, i.e. the incident beam is coupled from the incident fiber array 22 to the COM-side fiber collimator 23 via the lens array 21, Z-Block 20. That is, the integration of the DEMUX and MUX modules can be realized on one substrate.
Example 4
As shown in fig. 6, this embodiment is based on embodiment 2, and the only difference from embodiment 2 is that this embodiment adds a MUX module on the other side of the substrate 14, i.e. the incident beam passes through the lens array 21 from the incident fiber array 22, and since the parallelism of the 4 beams exiting through Z-Block20 is not very good, a light-correcting wedge is added between Z-Block20 and the lens array 21, so that the light beams are coupled to the COM-end fiber collimator 23 after passing through Z-Block 20.
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 (8)
1. A miniature wavelength division multiplexer, characterized by: the optical fiber coupling device comprises a single optical fiber collimator, a Z-Block, a lens array and an optical fiber array, wherein the Z-Block comprises a parallel substrate and a plurality of diaphragms fixed on the parallel substrate, the diaphragms transmit specific wavelengths and reflect light with residual wavelengths to the next diaphragm, the lens array is installed between the Z-Block and the optical fiber array, light beams emitted from the Z-Block are coupled to the optical fiber array through the lens array, and the single optical fiber collimator, the Z-Block, the lens array and the optical fiber array are arranged on the same substrate.
2. The miniature wavelength division multiplexer according to claim 1, wherein: the polylith diaphragm comprises 4 filters.
3. The miniature wavelength division multiplexer according to claim 1, wherein: and the incident light side of the Z-Block is plated with an antireflection film at an incident light inlet, and the rest positions of the incident light side are plated with a high-reflection film for the wavelength of the light reflected by the diaphragm.
4. The miniature wavelength division multiplexer according to claim 1, wherein: and when the parallelism of the output light beams of the Z-Block does not meet the preset requirement, adding a light correction wedge angle sheet between the Z-Block and the lens array to correct the spatial angle of the output light beams.
5. The miniature wavelength division multiplexer according to claim 4, wherein: the light correction wedge angle piece is a cylindrical or square wedge angle piece.
6. The miniature wavelength division multiplexer according to claim 1, wherein: the lens array is a 1x4 array.
7. The miniature wavelength division multiplexer according to claim 1, wherein: the optical fiber array is a 1x4 array and comprises a lower substrate with V-shaped grooves, 4 optical fibers and an upper substrate.
8. The miniature wavelength division multiplexer according to claim 1, wherein: the single optical fiber collimator, the Z-Block, the lens array and the optical fiber array are arranged on two sides of the substrate at the same time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811118577.7A CN110927883A (en) | 2018-09-20 | 2018-09-20 | Small-sized wavelength division multiplexer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811118577.7A CN110927883A (en) | 2018-09-20 | 2018-09-20 | Small-sized wavelength division multiplexer |
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| Publication Number | Publication Date |
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| CN110927883A true CN110927883A (en) | 2020-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811118577.7A Pending CN110927883A (en) | 2018-09-20 | 2018-09-20 | Small-sized wavelength division multiplexer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111458803A (en) * | 2020-05-19 | 2020-07-28 | 腾景科技股份有限公司 | Stable and adjustable CWDM small module |
| CN112882159A (en) * | 2021-03-03 | 2021-06-01 | 南京华脉科技股份有限公司 | Integrated wavelength division multiplexer |
| 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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| CN201828684U (en) * | 2010-10-11 | 2011-05-11 | 福州高意通讯有限公司 | Arrayed collimator |
| CN202351467U (en) * | 2011-12-22 | 2012-07-25 | 福州高意通讯有限公司 | Multipath parallel optical coupler |
| 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 |
| CN203799052U (en) * | 2014-03-21 | 2014-08-27 | 杰讯光电(福建)有限公司 | Super miniaturized CWDM module |
| CN104166195A (en) * | 2014-08-25 | 2014-11-26 | 珠海保税区光联通讯技术有限公司 | Wavelength division multiplexing filtering optical receiver |
| CN205333911U (en) * | 2015-12-04 | 2016-06-22 | 北极光电(深圳)有限公司 | Wavelength devision multiplex subassembly structure is learned to shimmer |
| CN206270545U (en) * | 2016-12-20 | 2017-06-20 | 上海中科光纤通讯器件有限公司 | 1 x 4 wave division multiplexer |
-
2018
- 2018-09-20 CN CN201811118577.7A patent/CN110927883A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201828684U (en) * | 2010-10-11 | 2011-05-11 | 福州高意通讯有限公司 | Arrayed collimator |
| CN202351467U (en) * | 2011-12-22 | 2012-07-25 | 福州高意通讯有限公司 | Multipath parallel optical coupler |
| 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 |
| CN203799052U (en) * | 2014-03-21 | 2014-08-27 | 杰讯光电(福建)有限公司 | Super miniaturized CWDM module |
| CN104166195A (en) * | 2014-08-25 | 2014-11-26 | 珠海保税区光联通讯技术有限公司 | Wavelength division multiplexing filtering optical receiver |
| CN205333911U (en) * | 2015-12-04 | 2016-06-22 | 北极光电(深圳)有限公司 | Wavelength devision multiplex subassembly structure is learned to shimmer |
| CN206270545U (en) * | 2016-12-20 | 2017-06-20 | 上海中科光纤通讯器件有限公司 | 1 x 4 wave division multiplexer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111458803A (en) * | 2020-05-19 | 2020-07-28 | 腾景科技股份有限公司 | Stable and adjustable CWDM small 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 |
| CN112882159A (en) * | 2021-03-03 | 2021-06-01 | 南京华脉科技股份有限公司 | Integrated wavelength division multiplexer |
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