CN105700081B - A kind of free space high port dense wave division multiplexer - Google Patents
A kind of free space high port dense wave division multiplexer Download PDFInfo
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- CN105700081B CN105700081B CN201610208575.1A CN201610208575A CN105700081B CN 105700081 B CN105700081 B CN 105700081B CN 201610208575 A CN201610208575 A CN 201610208575A CN 105700081 B CN105700081 B CN 105700081B
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- Prior art keywords
- convex lens
- lens
- free space
- dwdm
- division multiplexer
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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
- G02B6/29346—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
-
- 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
- G02B6/29364—Cascading by a light guide path between filters or filtering operations, e.g. fibre interconnected single filter modules
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The present invention discloses a kind of free space high port dense wave division multiplexer, including filter plate, collimator and relay lens；Multiple filter plates and corresponding collimator form a DWDM functional unit, incident signal beam is after multiple filter plate multiple reflections by the first DWDM functional unit, it is received through the signal light of each filter plate by corresponding to collimator, complete the wavelength-division function of multiple channels, remaining all signal beams continue to be incident on relay lens, and next DWDM functional unit is incident on after relayed lens shaping.The present invention utilizes relay lens, and multiple low port DWDM are cascaded into the DWDM device an of high port, avoids free space to the multiple coupling of optical fiber, realizes filter with low insertion loss；Without Optical Fiber Winding, compact structure is realized.
Description
Technical field
The present invention relates to technical field of optical fiber communication, refer in particular to a kind of free space high port dense wave division multiplexer.
Background technique
Wavelength-division multiplex can effectively increase bandwidth capacity in optical-fiber network, and light waveguide raster (AWG) technology is based on optical waveguide
The wavelength-division multiplex of high port may be implemented in technology.But it haves the shortcomings that some intrinsic, such as narrow bandwidth, and Insertion Loss is big and temperature
Spend stability difference etc..Insertion Loss in the case that then there is wavelength division multiplex device based on medium diaphragm technology performance to stablize with ground port
The features such as small.The wavelength division multiplex device of multichannel multiport, but the grade may be implemented after the three port devices cascade being individually encapsulated
Connection causes big loss, in view of the coiling of optical fiber, cannot achieve compact wavelength division multiplex device.Wide-angle filter plate is realized
The direct cascade of multiple-stage filtering piece avoids the multiple coupling of free space to optical fiber, forms compact wavelength division multiplex device.
As shown in Figure 1, multipass filter plate 20 will be different after wavelength division multiplexer collimates signal light by collimator 10
The Signal separator of frequency.The signal separated needs to receive by compact arranged collimator 10.Discrete collimator 10 is single
It solely adjusts arrangement or lens array adds fiber array to realize the function.But the arrangement of receiving device needs certain space.Letter
It number turns back between filter plate, the distance dependent of the lateral displacement of generation and angle and the signal transmission being incident on filter plate.
For the filter plate of coarse wavelength division multiplexing, design angle can be 13.5 °, 10 ° or 8 °.Angle is bigger, the volume of corresponding device
With regard to smaller.
For dense wave division multiplexer (200/100/50GHz), filter plate incident angle will be designed to wide-angle in theory
On be possible, but cost is very high.It is usually arranged as the small filter plate of incident angle, and the filter plate of low-angle, separate two
Light path required for adjacency channel is very long, and signal gradually dissipates after turning back repeatedly, and Insertion Loss becomes larger.The technology is utilized to limit
Realize the dense wavelength division multiplexing device of high port.It is already mentioned above to be cascaded using three port WDM devices, high port may be implemented
WDM device, but the disadvantage is that volume is big, Insertion Loss is high.
Based on the WDM of free space technology, when channel spacing is less than 200GHz, because of the design incident angle of filter plate
Small, the operating distance of the collimator as input and output is limited, and the port number that may be implemented is generally less than 4.If realized
Multiple base units (for example DWDM of 1x4) can be passed through traditional optical fiber by the dense wavelength division multiplexing of 1x8,1x16
Coupled modes are cascaded to together, as shown in Fig. 2, connected together between two DWDM base units (30,40) by optical fiber 50,
The optical fiber 50 will be sent to next DWDM base unit after signal optical coupling that upper 30 collimator 10 of DWDM base unit is emitted
40 collimator 10, but the cascade system is not avoided that the space problem required for fibre, and Insertion Loss has also been introduced in fiber coupling
Increase.
Summary of the invention
The purpose of the present invention is to provide a kind of free space high port dense wave division multiplexers will using relay lens
Multiple low port DWDM are cascaded into the DWDM device an of high port, avoid free space to the multiple coupling of optical fiber, realize low
Insertion Loss；Without Optical Fiber Winding, compact structure is realized.
To reach above-mentioned purpose, solution of the invention are as follows:
A kind of free space high port dense wave division multiplexer, including filter plate, collimator and relay lens；Multiple filtering
Piece and corresponding collimator form a DWDM functional unit, and incident signal beam is by the first DWDM functional unit
After multiple filter plate multiple reflections, is received through the signal light of each filter plate by corresponding to collimator, complete the wavelength-division of multiple channels
Function, remaining all signal beams continue to be incident on relay lens, and next DWDM function is incident on after relayed lens shaping
It can unit.
Further, the signal beams after relayed lens shaping are incident on next DWDM function list after reflecting mirror reflects
Member.
Further, the relay lens includes pipe laying, the first convex lens and the second convex lens；First convex lens and
Two convex lenses are mounted in pipe laying, and the first convex lens and the confocal setting of the second convex lens, the public focus are located at installing pipe
In road.
Further, pipe laying is glass tube or metal tube.
Further, first convex lens and the second convex lens are set as spherical lens (C-Lens).
Further, first convex lens and the second convex lens are set as ball-type lens.
Further, first convex lens and the second convex lens are set as biconvex lens.
Further, the pipe laying is mounted on mounting base by pedestal, and pedestal is arranged on mounting base, and pacifies
It installs on the base in tubulature road.
Further, the pedestal is oppositely arranged corner block by two and forms, and V-groove, pipe laying are formed between two corner blocks
It is mounted in the V-groove.
After adopting the above scheme, incident signal beam of the present invention is more by multiple filter plates of the first DWDM functional unit
After secondary reflection, is received through the signal light of each filter plate by corresponding to collimator, complete the wavelength-division function of multiple channels, remaining institute
There are signal beams to continue to be incident on relay lens, next DWDM functional unit is incident on after relayed lens shaping, can incite somebody to action
Its operating distance doubles, and separates conducive to by signal beams；Using relay lens, multiple low port DWDM can be cascaded into one
The DWDM device of high port avoids free space to the multiple coupling of optical fiber, realizes filter with low insertion loss；Without Optical Fiber Winding, realize tight
Gather type structure.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of prior art dense wavelength division multiplexing device；
Fig. 2 is the structural schematic diagram of prior art high port dense wavelength division multiplexing device；
Fig. 3 a is that two collimator of the prior art is worked normally apart from schematic diagram；
Fig. 3 b is that two collimator working distance of the prior art limits the schematic diagram for causing luminous energy to be lost；
Fig. 3 c is present invention installation relay lens back work distance from the schematic diagram doubled；
Fig. 4 is Application Example structural schematic diagram of the present invention；
Fig. 5 is relay lens first structure diagram of the present invention；
Fig. 6 a is the second structural schematic diagram of relay lens of the present invention；
Fig. 6 b is the second structure sectional view of relay lens of the present invention；
Fig. 7 is relay lens third structural schematic diagram of the present invention；
Fig. 8 is relay lens mounting structure schematic diagram of the present invention.
Label declaration
10 filter plate 20 of collimator
DWDM base unit (30,40) optical fiber 50
1 collimator 2 of filter plate
3 pipe laying 31 of relay lens
First convex lens, 32 second convex lens 33
4 pedestal 5 of reflecting mirror
The oneth DWDM functional unit 61 of corner block 51
Next 62 mounting base 7 of DWDM functional unit.
Specific embodiment
Below in conjunction with drawings and the specific embodiments, the present invention will be described in detail.
Refering to shown in Fig. 3 c to Fig. 8, a kind of free space high port dense wave division multiplexer that the present invention discloses, including filter
Wave plate 1, collimator 2 and relay lens 3.
As shown in figure 4, multiple filter plates 1 and corresponding collimator 2 form a DWDM functional unit, incoming signal
Light beam after 1 multiple reflections of multiple filter plates by the first DWDM functional unit 61, through each filter plate 1 signal light by right
It answers collimator 2 to receive, completes the wavelength-division function of multiple channels, remaining all signal beams continue to be incident on relay lens 3,
Next DWDM functional unit 62 is incident on after relayed 3 shaping of lens.
In the present embodiment, the signal beams after relayed 3 shaping of lens are incident on next DWDM function after the reflection of reflecting mirror 4
It can unit 62.
Incident signal beam of the present invention is after 1 multiple reflections of multiple filter plates by the first DWDM functional unit 61, thoroughly
The signal light for crossing each filter plate 1 is received by corresponding to collimator 2, completes the wavelength-division function of multiple channels, remaining all signal lights
Shu Jixu is incident on relay lens 3, is incident on next DWDM functional unit 63 after relayed 3 shaping of lens, can be by its work
It doubles as distance, is separated conducive to by signal beams.
As shown in Figure 3c, relay lens 3 is installed between two collimators 2, its operating distance can be doubled, is conducive to believe
The separation of number light beam.Operating distance when relay lens 3, operating distance are fitted without between two collimators 2 as shown in Figure 3a
It is shorter, it is unfavorable for signal beams separation.As shown in Figure 3b, two collimators 2, which are placed in, doubles operating distance schematic diagram, signal beams point
It dissipates larger.
, can be by multiple low port DWDM(dense wavelength division multiplexing devices meanwhile using relay lens) it is cascaded into a height
The DWDM device of port avoids free space to the multiple coupling of optical fiber, realizes filter with low insertion loss；Without Optical Fiber Winding, realize compact
Type structure, it is small in size.
The relay lens 3 includes pipe laying 31, the first convex lens 32 and the second convex lens 33；First convex lens, 31 He
Second convex lens 32 is mounted in pipe laying 31, the first convex lens 31 and the confocal setting of the second convex lens 32, the public focus
In pipe laying 31.Pipe laying 31 is glass tube or metal tube.
As shown in figure 8, the pipe laying 31 is mounted on mounting base 7 by pedestal 5, the setting of pedestal 5 is at installation bottom
On plate 7, and pipe laying 31 is mounted on pedestal 5.The pedestal 5 is oppositely arranged corner block 51 by two and forms, two corner blocks 51
Between form V-groove, pipe laying 31 is mounted in the V-groove, convenient for adjust relay lens 3 installation site and angle.Peace
Tubulature road 31 can be set to U-typed, be easily installed the first convex lens 31 and the second convex lens 32.
As shown in figure 5, first convex lens 32 and the second convex lens 33 are set as spherical lens, the first convex lens 32 is set
It is set to cylindrical lens, which is arranged spherical lens, and the first of the cylindrical lens other side 8 degree of angles of setting inclination is flat
Face.Second convex lens 33 is set as cylindrical lens, which is arranged spherical lens, cylindrical lens other side setting
Second plane at 8 degree of angles is tilted, the first plane is arranged in parallel with the second plane, and the first convex lens 32 and the second convex lens 33 are confocal
Setting.So as to avoid retroreflection light from being redirected back into optical system.C- used in the radius of curvature and both ends collimator of convex lens
LENS(is used for a kind of spherical mirror of optical fiber collimator production, and the other side relative to spherical surface usually has 8 degree of mis-cut angle))
Radius of curvature just as light beam can be reverted to the state before relay lens.
As shown in Fig. 6 a and Fig. 6 b, first convex lens 32 and the second convex lens 33 are set as ball-type lens, a pair
Ball-type lens are fixed into confocal state, it is possible to reduce space occupied by relay lens.In view of production technology, can will install
31 glass tube of pipeline is cut into two semi-cylindricals, facilitates the relative distance for adjusting glass lens, fixed after reaching confocal.Ball-type
The radius of curvature of lens can accomplish very little.
As shown in fig. 7, first convex lens 32 and the second convex lens 33 are set as cylindrical biconvex lens, in cylinder
Convex lens is respectively set in lens both ends, is fixed in 31 glass tube of pipe laying, forms confocal system, length is shorter, and coupling
The loss of conjunction is also small.
As shown in figure 4, the DWDM of two 1x4 is cascaded into the DWDM of a 1x8 by a relay lens 3.Continue attached
Add one or two relay lens 3 that 1x12,1x16DWDM may be implemented.Avoid free space to the multiple coupling of optical fiber, it is real
Existing filter with low insertion loss；Without Optical Fiber Winding, compact structure is realized, it is small in size.
The above description is only a preferred embodiment of the present invention, and not to the limitation of this case design, all designs according to this case are closed
The equivalent variations that key is done each falls within the protection scope of this case.
Claims (7)
1. a kind of free space high port dense wave division multiplexer, it is characterised in that: saturating including filter plate, collimator and relaying
Mirror；Multiple filter plates and corresponding collimator form a DWDM functional unit, and incident signal beam is passing through first
After multiple filter plate multiple reflections of DWDM functional unit, is received, completed by corresponding to collimator through the signal light of each filter plate
The wavelength-division function of multiple channels, remaining all signal beams continue to be incident on relay lens, after relayed lens shaping
Signal beams are incident on next DWDM functional unit after reflecting mirror reflects；The relay lens includes pipe laying, first convex
Lens and the second convex lens；First convex lens and the second convex lens are mounted in pipe laying, the first convex lens and the second convex lens
The public focus of the confocal setting of mirror, the first convex lens and the second convex lens is located in pipe laying.
2. a kind of free space high port dense wave division multiplexer as described in claim 1, it is characterised in that: pipe laying is
Glass tube or metal tube.
3. a kind of free space high port dense wave division multiplexer as described in claim 1, it is characterised in that: described first is convex
Lens and the second convex lens are set as spherical lens.
4. a kind of free space high port dense wave division multiplexer as described in claim 1, it is characterised in that: described first is convex
Lens and the second convex lens are set as ball-type lens.
5. a kind of free space high port dense wave division multiplexer as described in claim 1, it is characterised in that: described first is convex
Lens and the second convex lens are set as biconvex lens.
6. a kind of free space high port dense wave division multiplexer as described in claim 1, it is characterised in that: the installing pipe
Road is mounted on mounting base by pedestal, and pedestal is arranged on mounting base, and pipe laying installation is on the base.
7. a kind of free space high port dense wave division multiplexer as claimed in claim 6, it is characterised in that: the pedestal by
Two are oppositely arranged corner block composition, form V-groove between two corner blocks, pipe laying is mounted in the V-groove.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610208575.1A CN105700081B (en) | 2016-04-06 | 2016-04-06 | A kind of free space high port dense wave division multiplexer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610208575.1A CN105700081B (en) | 2016-04-06 | 2016-04-06 | A kind of free space high port dense wave division multiplexer |
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| CN105700081A CN105700081A (en) | 2016-06-22 |
| CN105700081B true CN105700081B (en) | 2019-03-05 |
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| CN201610208575.1A Active CN105700081B (en) | 2016-04-06 | 2016-04-06 | A kind of free space high port dense wave division multiplexer |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110515161A (en) * | 2019-08-12 | 2019-11-29 | 珠海市杰威光电科技有限公司 | A kind of multichannel wavelength division multiplexer |
| CN114791650B (en) * | 2022-03-24 | 2023-06-27 | 武汉光迅科技股份有限公司 | Optical multiplexing and demultiplexing structure and optical device using same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4715699A (en) * | 1985-01-28 | 1987-12-29 | Asahi Kogaku Kogyo Kabushiki Kaisha | Scanning optical system for laser beam printers |
| US5274385A (en) * | 1992-06-18 | 1993-12-28 | General Electric Company | Optical time delay units for phased array antennas |
| CN1219678A (en) * | 1997-06-26 | 1999-06-16 | 康宁股份有限公司 | Cascaded optical multiplexing devices |
| CN201820007U (en) * | 2010-05-11 | 2011-05-04 | 武汉奥新科技有限公司 | Low-loss multichannel wavelength division multiplexer |
| CN205787226U (en) * | 2016-04-06 | 2016-12-07 | 博立达（厦门）科技有限公司 | A kind of free space high port dense wave division multiplexer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030206688A1 (en) * | 2002-05-03 | 2003-11-06 | Hollars Dennis R. | Miniature optical multiplexer/de-multiplexer DWDM device |
-
2016
- 2016-04-06 CN CN201610208575.1A patent/CN105700081B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4715699A (en) * | 1985-01-28 | 1987-12-29 | Asahi Kogaku Kogyo Kabushiki Kaisha | Scanning optical system for laser beam printers |
| US5274385A (en) * | 1992-06-18 | 1993-12-28 | General Electric Company | Optical time delay units for phased array antennas |
| CN1219678A (en) * | 1997-06-26 | 1999-06-16 | 康宁股份有限公司 | Cascaded optical multiplexing devices |
| CN201820007U (en) * | 2010-05-11 | 2011-05-04 | 武汉奥新科技有限公司 | Low-loss multichannel wavelength division multiplexer |
| CN205787226U (en) * | 2016-04-06 | 2016-12-07 | 博立达（厦门）科技有限公司 | A kind of free space high port dense wave division multiplexer |
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Effective date of registration: 20190410 Address after: 215300 No. 168 Nanhe Road, Kunshan Development Zone, Kunshan, Suzhou, Jiangsu Patentee after: Xiang Guang optical communication equipment (Kunshan) Co., Ltd. Address before: 361009 S208A room, South Tower, Weiye building, Pioneer Park, torch high tech Zone, Xiamen, Fujian Patentee before: Bo Lida (Xiamen) Technology Co., Ltd. |
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