CN108061945A - A kind of inhibition electromagnetic interference optical module - Google Patents
A kind of inhibition electromagnetic interference optical module Download PDFInfo
- Publication number
- CN108061945A CN108061945A CN201610981758.7A CN201610981758A CN108061945A CN 108061945 A CN108061945 A CN 108061945A CN 201610981758 A CN201610981758 A CN 201610981758A CN 108061945 A CN108061945 A CN 108061945A
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- diaphragm
- optical module
- electromagnetic interference
- groove
- membrane group
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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
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4274—Electrical aspects
- G02B6/4277—Protection against electromagnetic interference [EMI], e.g. shielding means
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- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The present invention relates to optical module electromagnetic interference technical fields, provide a kind of inhibition electromagnetic interference optical module.Including optical module shell and optical assembly, wherein, the optical module shell includes housing and cap, the optical assembly is fixed on the housing, and it completes to assemble after being covered by the cap, the interface side for stationary light component external connection on the housing is provided with the first membrane group, and the first membrane group is formed by least two diaphragm is arranged in parallel；The direction in tandem of each diaphragm is parallel with the signal transmission direction of electrical interface；After the optical assembly is fixed on the housing, above the first membrane group.The embodiment of the present invention proposes a kind of using when designing optical module housing, just a membrane group is designed in the interface side of its stationary light component external connection, and the barrier and attenuation of the electromagnetic interference signal for being generated in the optical module course of work are realized to the inhibitory action of assigned frequency electromagnetic interference signal using membrane group.
Description
【Technical field】
The present invention relates to optical module electromagnetic interference technical field, more particularly to a kind of inhibition electromagnetic interference optical module.
【Background technology】
The drastically development of data communication particularly data center in recent years, market need a large amount of high performance optical modules.It is high
Performance refers mainly to the high-speed of optical module, integration and miniaturization.Current visible single channel rate is from original number
100000000 bps (Bit Per Second) rise to 10Gbps, 25Gbps, even more high；Multichannel is from 40Gbps (4X
10G), 100Gbps (4X 25G), so that the 200Gbps in future, 400Gbps etc..So high rate and so more high frequencies lead to
Road concentrates in together and (usually has tens optical modules to exist simultaneously in interchanger), is bound to cause extremely complex electromagnetic environment,
Such case proposes very harsh requirement to the design and manufacture of high rate optical module.
It is only inadequate from the attention of circuit design stage, is particularly generating higher hamonic wave, and higher hamonic wave exists
When meeting transmission conditions on the shell of optical module, fundamental wave and higher hamonic wave can be propagated on optical module shell, can increase
The ability that optical module is added to generate electromagnetic interference.Therefore, it is necessary to solution method is found out to this.
【The content of the invention】
One of technical problems to be solved of the embodiment of the present invention be how to reduce it during high-speed optical module use can
The electromagnetic interference that can be generated.
The embodiment of the present invention adopts the following technical scheme that：
In a first aspect, an embodiment of the present invention provides a kind of inhibition electromagnetic interference optical module, including optical module shell and light
Component, wherein, the optical module shell includes housing and cap, and the optical assembly is fixed on the housing, and by the shell
Assembling is completed after lid capping,
The interface side for stationary light component external connection on the housing is provided with the first membrane group, and described first
Membrane group is formed by least two diaphragm is arranged in parallel；The direction in tandem of each diaphragm and the signal transmission side of electrical interface
To parallel；
After the optical assembly is fixed on the housing, above the first membrane group.
Optionally, the housing is located at the interface side of stationary light component external connection and is provided with the first groove, and described first
Membrane group is located in first groove, and the top of the diaphragm in first groove is less than the table of two side body of groove
Face.
Optionally, setting agent is filled in first groove.
Optionally, the interface side for stationary light component external connection of the cap is provided with the second membrane group, described
Second membrane group is formed by least two diaphragm is arranged in parallel；The direction in tandem of each diaphragm and the signal of electrical interface pass
Defeated direction is parallel.
Optionally, the cap is located at the interface side of optical assembly external connection and is provided with the second groove, second membrane
Group structure is located in second groove, and the top of the diaphragm in second groove is interior less than groove both sides cap
Surface.
Optionally, setting agent is filled in second groove.
Optionally, the spacing of each diaphragm and the area of diaphragm are associated with equivalent capacity, each diaphragm
Thickness it is associated with equivalent inductance；The setting value of the spacing of the diaphragm, area and thickness so that by equivalent capacity and wait
The inhibition frequency that effect inductance calculates inhibits in target in frequency range.
Optionally, it is QSFP in the smooth film block, when working frequency is 10.3125GHz, then the diaphragm depth is
2.7mm, diaphragm width are 0.6mm, diaphragm centre distance is 1.8mm, diaphragm quantity is 11.
Optionally, the optical module includes：
Small pluggable emission and reception module SFP, Miniature optical fiber interface unit SFF, SFP+, four-way SFP interfaces QSFP,
Gigabit interface converter GBIC or 10G plug-in optical transceiving integrated module XFP.
Compared with prior art, one of advantageous effect of the embodiment of the present invention is：The embodiment of the present invention proposes one kind
Using when designing optical module housing, just design a membrane group in the interface side of its stationary light component external connection, and using every
Film group is realized and believed for the electromagnetic interference generated in the optical module course of work to the inhibitory action of assigned frequency electromagnetic interference signal
Number barrier and attenuation.
【Description of the drawings】
Fig. 1 is a kind of partial exploded view for inhibiting electromagnetic interference optical module provided in an embodiment of the present invention；
Fig. 2 is a kind of shell structure schematic diagram for inhibiting electromagnetic interference optical module provided in an embodiment of the present invention；
Fig. 3 is a kind of shell cover structure schematic diagram for inhibiting electromagnetic interference optical module provided in an embodiment of the present invention；
Fig. 4 is that a kind of inhibition electromagnetic interference optical module provided in an embodiment of the present invention is completed structure diagram；
Fig. 5 is a kind of housing side sectional view for inhibiting electromagnetic interference optical module provided in an embodiment of the present invention；
Fig. 6 is the top view on the inside of a kind of cap for inhibiting electromagnetic interference optical module provided in an embodiment of the present invention；
Fig. 7 is the top view on the inside of a kind of cap for inhibiting electromagnetic interference optical module provided in an embodiment of the present invention；
Fig. 8 is a kind of diaphragm schematic shapes provided in an embodiment of the present invention；
Fig. 9 is that a kind of test result for inhibiting electromagnetic interference optical module provided in an embodiment of the present invention compares figure；
Figure 10 is that a kind of test result for inhibiting electromagnetic interference optical module provided in an embodiment of the present invention compares figure.
【Specific embodiment】
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
In the description of the present invention, the fingers such as term " interior ", " outer ", " longitudinal direction ", " transverse direction ", " on ", " under ", " top ", " bottom "
The orientation or position relationship shown be based on orientation shown in the drawings or position relationship, be for only for ease of the description present invention rather than
It is required that the present invention must be with specific azimuth configuration and operation, therefore it is not construed as limitation of the present invention.
In addition, as long as technical characteristic involved in the various embodiments of the present invention described below is each other not
Conflict is formed to can be combined with each other.
Inventor has found that, in the high-speed frequency range of more than 10G, the metal shell of optical module can regard rectangular waveguide as,
Then its cutoff frequency can be analyzed with following microwave waveguide theoretical formula.
Wherein, f is the cutoff frequency of waveguide, and C is the light velocity, and a is the long side of rectangular waveguide.Such as small pluggable is received and dispatched
(Small Form-factor Pluggable, are abbreviated as optical module：SFP) optical module shell sectional dimension is about 13.8mm
X 8.7mm are 10.87GHz according to its cutoff frequency is calculated.Equally, four-way SFP interfaces (Quad Small Form-
Factor Pluggable, are abbreviated as：QSFP) sectional dimension of optical module shell is about 14.45mm x 8.7mm, cut-off
Frequency is 10.38GHz.According to this analysis, the high-frequency signal (higher hamonic wave including fundamental frequency etc.) of more than 10G can be in optical mode
The shell of block is propagated, and can be radiated in the both ends of module (optical port and power port), it is most likely that causes unnecessary electricity
Magnetic disturbance.
The electromagnetic interference source of transceiver optical module generally has laser driving chip, and laser is (particularly direct in itself
Modulation system laser) and trans-impedance amplifier, limiting amplifier etc..Except device in itself, HW High Way is particularly in impedance
Discontinuous position is also due to radiation generates electromagnetic interference.Therefore, the electromagnetic interference how improved between optical module is current
The technical issues of being badly in need of solving.
Embodiment 1:
The embodiment of the present invention 1 provides a kind of inhibition electromagnetic interference optical module, and the optical module includes：Small pluggable is received
(Small Form Factor, are abbreviated as light emitting module SFP, Miniature optical fiber interface unit：SFF), SFP+, four-way SFP connect
Mouth QSFP, gigabit interface converter GBIC or 10G plug-in optical transceiving integrated module (10Gigabit Small Form
Factor Pluggable, are abbreviated as：XFP).As shown in Figure 1, including optical module shell 1 and optical assembly 2, wherein, such as Fig. 2 and 3
Shown, the optical module shell includes housing 11 and cap 12, and the optical assembly is fixed on the housing 11, and by the shell
Lid 12 completes assembling (as shown in Figure 4) after covering.
As shown in figure 5, the interface side for stationary light component external connection on the housing 11 be provided with first every
Film group 21, the first membrane group are formed by least two diaphragm 211 is arranged in parallel；The direction in tandem of each diaphragm with
The signal transmission direction of electrical interface is parallel；
After the optical assembly is fixed on the housing 11, above the first membrane group.
The embodiment of the present invention proposes a kind of utilization when designing optical module housing, just in its stationary light component external connection
Interface side design a membrane group, and using membrane group to the inhibitory action of assigned frequency electromagnetic interference signal, realize for light
The barrier and attenuation of the electromagnetic interference signal generated in module routine.
In order to ensure that the diaphragm is unlikely in installation process because of physical damnification and modification, of the invention real
It applies during example realizes, there are a kind of optional realization method, as shown in figure 5, to be located at stationary light component external for the housing 11
The interface side of connection is provided with the first groove (since the first groove accommodates the space structure of the membrane group 21, in Fig. 5
In marked membrane group 21 in the case of, do not carry out the additional mark of groove), the first membrane group is located at described first
In groove, the top of the diaphragm in first groove is less than the surface of two side body 11 of groove.Existing optical module
The base plate thickness of housing is typically not capable of the requirement for height of the diaphragm, therefore, is designing and producing the optical module housing
During mold, can it is described setting the first membrane group position design to form a table top first, then, designed in the table top to
Few 2 diaphragms.Specifically, at least 2 diaphragms making formation can be by be cut by laser complete or
By being formed simultaneously during die casting housing.
Although above-mentioned optional implementation is by designing a kind of groove structure so that diaphragm can be by the outer wall of groove
It protects, still, just can not protect diaphragm well just with above-mentioned groove structure when situations below occurs.Specifically
's：The inhibition electromagnetic interference signal demand, when membrane group needs are made of 5, even 10 diaphragms, because by every
Diaphragm quantity and its diaphragm centre distance constitute membrane group total length, and the membrane group total length can be with diaphragm quantity
Increase and increase, when reaching described 5 or 10 diaphragms, the diaphragm of intermediate region still can be easily in installation light
External force is subject to act on and deform upon during component.Therefore, the embodiment of the present invention additionally provides a kind of optional mode, the optional side
Formula can combine realization with the optional mode of above-mentioned design groove, specifically：Setting agent is filled in first groove.
Silica gel usually may be employed in the setting agent, low using the fusing point of silica gel, and is filled in each diaphragm under room temperature for solid-state properties
Between gap, and cover the diaphragm top；On the other hand, silica gel has non-conductive and without magnetic induction characteristic, can ensure
Membrane group will not be had an impact the functional characteristic of itself.
Housing 11 and cap 12 are included due to composition optical module, in order to reach more comprehensive electromagnetic interference
Shielding, the embodiment of the present invention additionally provide a kind of alternative, and the alternative can be with the above-mentioned embodiment 1 proposed
And its two kinds of optional modes are combined realization.As shown in fig. 6, in this alternative, the cap 12 is used to fix light
The interface side of component external connection is provided with the second membrane group 22, and the second membrane group is arranged in parallel by least two diaphragm
Composition；The direction in tandem of each diaphragm is parallel with the signal transmission direction of electrical interface.
For with above-mentioned housing side to the protection thinking in the industry processes of the first membrane group 21, in the cap side
When second membrane group 22 is set, the scheme of being similarly modified is equally existed.Specifically：The cap 12 is located at optical assembly external connection
Interface side be provided with the second groove, the second membrane group structure is located in second groove, in second groove
The top of diaphragm is less than the inner surface of groove both sides cap 12.Optionally, setting agent is filled in second groove.
Silica gel usually may be employed in the setting agent, low using the fusing point of silica gel, and is filled in each diaphragm under room temperature for solid-state properties
Between gap, and cover the diaphragm top；On the other hand, silica gel has non-conductive and without magnetic induction characteristic, can ensure
Membrane group will not be had an impact the functional characteristic of itself.
Embodiment 2:
The embodiment of the present invention is on the basis of embodiment 1, further to the membrane of the attached drawing case provided in embodiment 1
The design of chip architecture and groove structure is improved, in order to which the improved scheme realized based on embodiment 1 can obtain more
Good electromagnetic interference inhibition.It is now just illustrated by taking cap 12 as an example, those skilled in the art can be disclosed scheme
On the basis of, its realization method is realized in housing 11, specifically：
As shown in fig. 7, two of bottom and the cap of the region including the cap 12 of the membrane group covering
Side so that the membrane chip architecture of the rectangle as shown in Fig. 5 or 6 is rendered as in this realization method just like shape shown in Fig. 8
Shape.Its advantage is that, realize cap side radial direction electromagnetic interference signal can transmission channel all standing.It compares such as Fig. 6
The mode of shown local complexity can obtain better electromagnetic interference inhibitory action.Similar, similarly may be used in 11 side of housing
To realize diaphragm as shown in Figure 6, and can play electromagnetic interference signal can transmission channel all standing.
Embodiment 3：
How the embodiment of the present invention completes relevant parameter setting in the first membrane group and/or the second membrane group if giving
Implementation method, the method can apply to above-mentioned each optional implementation.In the present embodiment, inventor passes through research
It was found that the spacing of each diaphragm and the area of diaphragm are associated with equivalent capacity, the thickness of each diaphragm with it is equivalent
Inductance is associated.And it can solve to obtain corresponding equivalent electricity by the setting value of the spacing of the diaphragm, area and thickness
Appearance and equivalent inductance so that inhibited by the inhibition frequency that equivalent capacity and equivalent inductance calculate in target in frequency range.
In specific manufacturing process, simulation can be done by the correspondence between above-mentioned parameter and equivalent capacity and equivalent inductance and is surveyed
Examination, to obtain ideal pre-set parameter.
Further, one group of parameter value is given, specific to being QSFP in the smooth film block, working frequency is
During 10.3125GHz, then the diaphragm depth is 2.7mm, diaphragm width is 0.6mm, diaphragm centre distance be 1.8mm,
Diaphragm quantity is 11.
Fig. 9 and Figure 10 be embodiment in operating rate 10.3125GHz, according to as defined in FCC Part 15Class B
The measured result of test method.It is observed that compared with traditional optical module shell, there is the light of the present invention of electromagnetic bandgap structure
Module is in V and H directions, the average improvement for having 3dB, it was demonstrated that effectiveness of the invention.
What deserves to be explained is in information exchange, implementation procedure between module, unit in above device and system etc.
Hold, due to being based on same design with the processing method embodiment of the present invention, particular content can be found in the method for the present invention embodiment
Narration, details are not described herein again.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of embodiment is can to lead to
Program is crossed relevant hardware to be instructed to complete, which can be stored in a computer readable storage medium, storage medium
It can include：Read-only memory (ROM, Read Only Memory), random access memory (RAM, Random Access
Memory), disk or CD etc..
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of inhibition electromagnetic interference optical module, which is characterized in that including optical module shell and optical assembly, wherein, the optical mode
Block shell includes housing and cap, and the optical assembly is fixed on the housing, and completes to assemble after being covered by the cap,
The interface side for stationary light component external connection on the housing is provided with the first membrane group, first membrane
Group is formed by least two diaphragm is arranged in parallel；The direction in tandem of each diaphragm and the signal transmission direction of electrical interface are put down
Row；
After the optical assembly is fixed on the housing, above the first membrane group.
2. inhibition electromagnetic interference optical module according to claim 1, which is characterized in that the housing is located at stationary light component
The interface side of external connection is provided with the first groove, and the first membrane group is located in first groove, first groove
The top of interior diaphragm is less than the surface of two side body of groove.
3. inhibition electromagnetic interference optical module according to claim 2, which is characterized in that filled with fixed in first groove
Shape agent.
4. inhibition electromagnetic interference optical module according to claim 1, which is characterized in that the cap for fixing light group
The interface side of part external connection is provided with the second membrane group, and the second membrane group is formed by least two diaphragm is arranged in parallel；
The direction in tandem of each diaphragm is parallel with the signal transmission direction of electrical interface.
5. inhibition electromagnetic interference optical module according to claim 4, which is characterized in that it is external that the cap is located at optical assembly
The interface side of connection is provided with the second groove, and the second membrane group structure is located in second groove, second groove
The top of interior diaphragm is less than the inner surface of groove both sides cap.
6. inhibition electromagnetic interference optical module according to claim 5, which is characterized in that filled with fixed in second groove
Shape agent.
7. according to any inhibition electromagnetic interference optical modules of claim 1-6, which is characterized in that between each diaphragm
Away from associated with equivalent capacity with the area of diaphragm, the thickness of each diaphragm is associated with equivalent inductance；The membrane
The setting value of the spacing of piece, area and thickness so that pressed down by the inhibition frequency that equivalent capacity and equivalent inductance calculate in target
In frequency range processed.
8. it is according to claim 7 inhibition electromagnetic interference optical module, which is characterized in that the smooth film block be QSFP, work
When working frequency is 10.3125GHz, then the diaphragm depth is 2.7mm, diaphragm width is 0.6mm, diaphragm centre distance
It it is 11 for 1.8mm, diaphragm quantity.
9. inhibition electromagnetic interference optical module according to claim 1, which is characterized in that the optical module includes：
Small pluggable emission and reception module SFP, Miniature optical fiber interface unit SFF, SFP+, four-way SFP interfaces QSFP, lucky ratio
Special interface convertor GBIC or 10G plug-in optical transceiving integrated modules XFP.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610981758.7A CN108061945B (en) | 2016-11-08 | 2016-11-08 | A kind of inhibition electromagnetic interference optical module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610981758.7A CN108061945B (en) | 2016-11-08 | 2016-11-08 | A kind of inhibition electromagnetic interference optical module |
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| Publication Number | Publication Date |
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| CN108061945A true CN108061945A (en) | 2018-05-22 |
| CN108061945B CN108061945B (en) | 2019-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610981758.7A Active CN108061945B (en) | 2016-11-08 | 2016-11-08 | A kind of inhibition electromagnetic interference optical module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113189721A (en) * | 2021-05-19 | 2021-07-30 | 深圳市爱得乐电子有限公司 | Photoelectric hybrid module |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030124903A1 (en) * | 2000-11-02 | 2003-07-03 | Shuichiro Inagaki | Optical active connector plug for lan and its connector port |
| US20090175582A1 (en) * | 2008-01-04 | 2009-07-09 | Finisar Corporation | Electromagnetic inteference containment structures |
| CN102763012A (en) * | 2010-12-20 | 2012-10-31 | 住友电气工业株式会社 | Optical transceiver having enhanced EMI tolerance |
| CN205157852U (en) * | 2015-12-04 | 2016-04-13 | 青岛海信宽带多媒体技术有限公司 | But plug optical module |
-
2016
- 2016-11-08 CN CN201610981758.7A patent/CN108061945B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030124903A1 (en) * | 2000-11-02 | 2003-07-03 | Shuichiro Inagaki | Optical active connector plug for lan and its connector port |
| US20090175582A1 (en) * | 2008-01-04 | 2009-07-09 | Finisar Corporation | Electromagnetic inteference containment structures |
| CN102763012A (en) * | 2010-12-20 | 2012-10-31 | 住友电气工业株式会社 | Optical transceiver having enhanced EMI tolerance |
| CN205157852U (en) * | 2015-12-04 | 2016-04-13 | 青岛海信宽带多媒体技术有限公司 | But plug optical module |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113189721A (en) * | 2021-05-19 | 2021-07-30 | 深圳市爱得乐电子有限公司 | Photoelectric hybrid module |
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| CN108061945B (en) | 2019-11-26 |
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