CN110121254B - Optical port electromagnetic shielding structure of optical module, optical module and manufacturing method of optical module - Google Patents

Optical port electromagnetic shielding structure of optical module, optical module and manufacturing method of optical module Download PDF

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Publication number
CN110121254B
CN110121254B CN201910462649.8A CN201910462649A CN110121254B CN 110121254 B CN110121254 B CN 110121254B CN 201910462649 A CN201910462649 A CN 201910462649A CN 110121254 B CN110121254 B CN 110121254B
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China
Prior art keywords
optical module
pressing block
base
optical
electromagnetic shielding
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CN110121254A (en
Inventor
杨亚强
樊志刚
汤彪
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Wuhan Huagong Genuine Optics Tech Co Ltd
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Wuhan Huagong Genuine Optics Tech Co Ltd
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/42Coupling light guides with opto-electronic elements
    • G02B6/4201Packages, e.g. shape, construction, internal or external details
    • G02B6/4219Mechanical fixtures for holding or positioning the elements relative to each other in the couplings; Alignment methods for the elements, e.g. measuring or observing methods especially used therefor
    • G02B6/4236Fixing or mounting methods of the aligned elements
    • G02B6/4237Welding
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/42Coupling light guides with opto-electronic elements
    • G02B6/4201Packages, e.g. shape, construction, internal or external details
    • G02B6/4274Electrical aspects
    • G02B6/4277Protection against electromagnetic interference [EMI], e.g. shielding means
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00Screening of apparatus or components against electric or magnetic fields
    • H05K9/0007Casings
    • H05K9/0058Casings specially adapted for optoelectronic applications

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electromagnetism (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

The invention relates to the technical field of photoelectricity, and provides an optical port electromagnetic shielding structure of an optical module, which comprises a pressing block capable of being arranged on a base of the optical module, and further comprises a spring piece assembly capable of being arranged on the inner side wall of a sheet metal cover of the optical module to eliminate an elongated gap between the sheet metal cover and the pressing block, wherein the spring piece assembly is positioned above the pressing block, and the pressing block is provided with a first installation part and a second installation part for being respectively provided with a TOSA and a ROSA. The optical module comprises the optical port electromagnetic shielding structure. The manufacturing method of the optical module comprises the following steps S1-S3. Through covering at the panel beating and establish the shell fragment subassembly, after covering down, can eliminate the long and thin gap between panel beating lid and the briquetting, can cover good contact with the panel beating, effectively promote the electromagnetic shield performance of optical module light mouth.

Description

Optical port electromagnetic shielding structure of optical module, optical module and manufacturing method of optical module
Technical Field
The invention relates to the technical field of photoelectricity, in particular to an optical port electromagnetic shielding structure of an optical module, the optical module and a manufacturing method of the optical module.
Background
The traditional sheet metal cover type optical module is characterized in that the TOSA and the ROSA are fixed through the sheet metal cover, the base and the pressing block, the fixing mode is simple, but an elongated gap exists between the common pressing block and the sheet metal cover, abnormal sound exists in the module, and meanwhile electromagnetic waves of an optical port of the optical module cannot be effectively shielded. In general, when the performance of the light port cannot meet the requirement in such a fixing mode, conductive soft materials such as conductive cloth or conductive rubber strips are stuck between a common pressing block and a metal plate cover to overcome the defect, and although the EMI performance of the light module can be enhanced, the assembly is complex, and the material cost is greatly increased.
Disclosure of Invention
The invention aims to provide an optical port electromagnetic shielding structure of an optical module, the optical module and a manufacturing method of the optical module, wherein an elastic sheet assembly is arranged on a metal plate cover, and after the elastic sheet assembly is covered, a slender gap between the metal plate cover and a pressing block can be eliminated, the electromagnetic shielding structure can be well contacted with the metal plate cover, and the electromagnetic shielding performance of the optical port of the optical module is effectively improved.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions: the utility model provides an optical port electromagnetic shield structure of optical module, includes the briquetting of installing on the base of optical module, still includes the elastic sheet subassembly that can install on the inside wall of the panel beating lid of optical module in order to eliminate the panel beating lid with long and thin gap between the briquetting, the elastic sheet subassembly is located the top of briquetting, the briquetting has first installation department and the second installation department that supply TOSA and ROSA to install respectively.
Further, the shell fragment subassembly is including laminating the connecting piece of panel beating lid inside wall installation and install a plurality of shell fragments on the connecting piece, every the shell fragment all includes can contact the contact end of panel beating lid inside wall.
Further, each elastic piece comprises a first section connected with the edge of the connecting piece and a second section connected with the tail end of the first section, each second section extends towards the direction away from the pressing block, and the tail end of each second section is the contact end.
Further, each elastic piece is distributed at intervals along the length direction of the connecting piece.
Further, the connecting piece is provided with a plurality of welding points which can be welded on the metal plate cover.
Further, the left side and the right side of the pressing block are both protruded with first protrusions which can be attached to the base to eliminate the elongated gaps.
Further, a cylinder which can be inserted into the circular hole of the base to eliminate the elongated gap is arranged between the first mounting part and the second mounting part of the pressing block.
The embodiment of the invention provides another technical scheme that: the utility model provides an optical module, includes base, TOSA, ROSA and can cover panel beating lid on the base still includes foretell light mouth electromagnetic shield structure, the base has the confession the recess that the briquetting card was gone into, the panel beating lid closes after on the base, the shell fragment subassembly with the briquetting laminating.
Further, a second protrusion which can be attached to the pressing block to eliminate the elongated gap is protruded on the inner side wall of the groove.
The embodiment of the invention provides another technical scheme that: the manufacturing method of the optical module comprises the following steps:
S1, preparing a base, a TOSA, a ROSA, a pressing block and a sheet metal cover in advance;
s2, mounting the TOSA and the ROSA on the base, pressing the TOSA and the ROSA on the base by adopting the pressing block, and simultaneously mounting a spring piece assembly on the inner side wall of the sheet metal cover;
S3, covering a metal plate cover provided with an elastic sheet assembly on the base, and pressing the elastic sheet assembly on the pressing block;
in the step S3, the elastic piece assembly can eliminate an elongated gap between the metal plate cover and the pressing block.
Compared with the prior art, the invention has the beneficial effects that: through covering at the panel beating and establish the shell fragment subassembly, after covering down, can eliminate the long and thin gap between panel beating lid and the briquetting, can cover good contact with the panel beating, effectively promote the electromagnetic shield performance of optical module light mouth.
Drawings
Fig. 1 is a schematic structural diagram of a spring assembly of an optical port electromagnetic shielding structure of an optical module according to a first embodiment of the present invention;
Fig. 2 is a schematic structural diagram of a compact of an optical port electromagnetic shielding structure of an optical module according to a first embodiment of the present invention;
Fig. 3 is an exploded schematic diagram of an optical module according to a second embodiment of the present invention;
Fig. 4 is a schematic structural diagram of a sheet metal cover mounting spring assembly of an optical module according to a second embodiment of the present invention;
Fig. 5 is a schematic structural diagram of a base of an optical module according to a second embodiment of the present invention;
in the reference numerals: 1-briquetting; 10-a first mounting portion; 11-a second mounting portion; 12-a first bump; 13-cylinder; 14-notch groove; 2-a spring plate assembly; 20-connecting piece; 200-welding points; 21-shrapnel; 210-a first section; 211-a second section; 212-contact ends; 3-a base; 30-a base round hole; 31-a second bump; 32-optical port; 4-TOSA;5-ROSA; 6-a sheet metal cover; 60-inside wall of panel beating lid.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
Referring to fig. 1-5, an embodiment of the present invention provides an optical port electromagnetic shielding structure of an optical module, which includes a pressing block 1 capable of being mounted on a base 3 of the optical module, and in addition to the pressing block 1, a spring plate assembly 2 capable of being mounted on an inner sidewall 60 of a sheet metal cover of the optical module to eliminate an elongated gap between the sheet metal cover 6 and the pressing block 1, wherein the spring plate assembly 2 is located above the pressing block 1, and the pressing block 1 has a first mounting portion 10 and a second mounting portion 11 for mounting TOSA4 and ROSA5, respectively. In this embodiment, the structure generally includes two parts, one is the press block 1, and one is the shrapnel assembly 2, the press block 1 is installed on the base 3, specifically, the base 3 has a groove that can supply it to block into, and press TOSA (laser) 4 and ROSA (detector) 5 by its first installation department 10 and second installation department 11 respectively, and because after the panel beating lid 6 is covered on the base 3, the shrapnel assembly 2 on it can press the upper portion of the press block 1, because the shrapnel assembly 2 has elasticity, it produces elastic deformation after receiving the extrusion, with the elongated gap elimination between the panel beating lid 6 that will laminate with it, can realize good contact, overcome the problem that there is abnormal sound in press block 1 fixed TOSA4 and ROSA5 among the prior art, and because of having eliminated elongated gap, effectively promoted the electromagnetic shielding performance of optical module light mouth 32.
The following are specific examples:
as an optimization scheme of the embodiment of the present invention, referring to fig. 1 and 2, the first mounting portion 10 includes a first arc-shaped slot capable of matching the shape of the TOSA4, the second mounting portion 11 includes a second arc-shaped slot capable of matching the shape of the ROSA5, and the first arc-shaped slot and the second arc-shaped slot are respectively disposed at a lower portion of the body and are spaced apart. In this embodiment, the first arc-shaped groove and the second arc-shaped groove are provided, so that when the conductive rubber press block 1 is clamped into the groove of the base 3, the TOSA4 and the ROSA5 can be respectively and firmly pressed to ensure stability, and the installation of the TOSA and the ROSA5 is more stable. Of course, besides, two through holes can be formed on the body, and then the TOSA4 and the ROSA5 can be inserted into the two through holes respectively, so that the method is also a scheme capable of stabilizing the TOSA4 and the ROSA5, but the installation of the first arc-shaped groove and the second arc-shaped groove is not convenient when the conductive rubber press block 1 is assembled, because after all, the TOSA4 and the ROSA5 need to be inserted into the two through holes first, and then the conductive rubber press block 1 is clamped into the groove of the base 3, but if the first arc-shaped groove and the second arc-shaped groove exist, only the TOSA4 and the ROSA5 need to be aligned by being held by a hand.
Further optimizing the above, referring to fig. 1 and 2, the first arcuate slot has a first slot wall that is interference fit with the TOSA4, and the second arcuate slot has a second slot wall that is interference fit with the ROSA 5. In this embodiment, the first slot wall is in interference fit with the TOSA4, and the second slot wall is in interference fit with the ROSA5, so that the electromagnetic shielding capability can be further improved.
As an optimization scheme of the embodiment of the present invention, referring to fig. 1-4, the spring plate assembly 2 includes a connecting piece 20 that can be attached to the inner sidewall 60 of the sheet metal cover, and a plurality of spring plates 21 mounted on the connecting piece 20, where each spring plate 21 includes a contact end 212 that can contact the inner sidewall 60 of the sheet metal cover. In this embodiment, after the connecting piece 20 is mounted on the inner sidewall 60 of the sheet metal cover, the contact end 212 of each elastic piece 21 contacts with the sheet metal cover 6, so before the pressing by the pressing block 1 (i.e. in the initial state), the electromagnetic protection capability is already provided, and after the sheet metal cover 6 is covered, each elastic piece 21 contacts with the pressing block 1 and is pressed by the pressing block 1 (i.e. in the pressing state), so that the contact end 212 of each elastic piece 21 is more tightly abutted against the inner side of the sheet metal cover 6, and better protection effect is achieved.
With further optimization, referring to fig. 1 and 4, each spring 21 includes a first section 210 connected to an edge of the connecting piece 20 and a second section 211 connected to a tail end of the first section 210, each second section 211 extends away from the pressing block 1, and a tail end of each second section 211 is the contact end 212. In this embodiment, each spring plate 21 is optimized to have a two-stage structure, which is formed by a first section 210 and a second section 211, wherein the first section 210 is connected to the edge of the connecting piece 20, then the second section 211 is connected to the first section 210, as shown in fig. 1, the first section 210 and the second section 211 are combined to form a V shape, and the second section 211 is inclined towards the inner side wall 60 of the sheet metal cover, so that the contact end 212 of the spring plate 21 can already contact the inner side wall when the connecting piece 20 is mounted on the inner side wall.
As an optimization scheme of the embodiment of the present invention, referring to fig. 1 and 4, each of the elastic pieces 21 is arranged at intervals along the length direction of the connecting piece 20. In this embodiment, the elastic pieces 21 are spaced apart from each other, and need not be completely abutted against each other. Of course, the sparseness of the second section 211 of the elastic sheet 21 may be determined according to the actual situation, and when the second section 211 extends in the same direction, if the second section extends outside the connecting piece 20 as shown in fig. 1, the connecting piece 20 may be directly installed as shown in fig. 4, and if the second section 211 extends in the opposite direction, or the first section 211 and the second section 211 extend in opposite directions, a groove for entering the second section 211 needs to be formed on the connecting piece 20, otherwise interference may be formed. The above embodiments can all play a role of electromagnetic shielding.
As an optimization of the embodiment of the present invention, referring to fig. 1 and 4, the connecting piece 20 has several welding points 200 for welding on the sheet metal cover 6. In the present embodiment, the connecting member 20 is mounted on the sheet metal cover 6 by welding to ensure firmness. Of course, other installations are possible, and this embodiment is not limited thereto.
As an optimization scheme of the embodiment of the present invention, referring to fig. 2, the left and right sides of the pressing block 1 are protruded with a first protrusion 12 that can be attached to the base 3 to eliminate the elongated gap. In this embodiment, the two first protrusions 12 are provided, so that the pressing block 1 is clamped into the base 3, so that close contact can be ensured, and the elongated gap is eliminated, so that a better electromagnetic shielding effect is achieved.
As an optimization scheme of the embodiment of the present invention, referring to fig. 2 and 5, a cylinder 13 that can be inserted into the base circular hole 30 to eliminate the elongated gap is disposed between the first mounting portion 10 and the second mounting portion 11 of the pressing block 1. In this embodiment, the cylinder 13 is provided on the pressing block 1 and can be inserted into the base round hole 30 in a matching manner, so as to avoid an elongated gap at the base round hole 30.
As an optimization scheme of the embodiment of the present invention, referring to fig. 2 and 5, the pressing block 1 is provided with a notch groove 14 for smooth rotation and rebound of the unlocking fin, the notch groove 14 has two openings, one opening is formed on the upper surface of the pressing block 1, the other opening is formed on the side surface of the body, which is close to the light opening 32 of the base 3, and the two openings are communicated. In the present embodiment, the notch 14 is provided to facilitate smooth rotation and rebound of the unlocking fin, and the two openings are provided to prevent interference with the unlocking fin.
Further optimizing the scheme, the notch groove 14 is a cylindrical 13 groove, the cylindrical surface of the cylindrical 13 groove is provided with one opening, and the upper end face of the cylindrical 13 groove is provided with the other opening. In this embodiment, in order to match the unlocking fin and the locking head, the notch groove 14 is optimized as a cylindrical 13 groove.
Embodiment two:
Referring to fig. 1-5, an embodiment of the present invention provides an optical module, which includes a base 3, TOSA4, ROSA5, and a metal plate cover 6 that can cover the base 3, and in addition to the above, the optical module further includes the optical port electromagnetic shielding structure, the base 3 has a groove into which the pressing block 1 is clamped, and after the metal plate cover 6 is covered on the base 3, the elastic piece assembly 2 is attached to the pressing block 1. In this embodiment, the pressing block 1 is mounted on the base 3, specifically, the base 3 has a groove into which the pressing block can be clamped, and the TOSA4 (laser) and ROSA5 (probe) are respectively pressed by the first mounting portion 10 and the second mounting portion 11, and since the metal plate cover 6 is covered on the base 3, the elastic sheet component 2 thereon can press against the upper portion of the pressing block 1, and since the elastic sheet component 2 has elasticity, it is elastically deformed after being pressed, so that the elongated gap between the metal plate cover 6 attached to the elastic sheet component is eliminated, good contact can be achieved, the problem that abnormal sound exists in the fixing TOSA4 and ROSA5 of the pressing block 1 in the prior art is overcome, and since the elongated gap is eliminated, the electromagnetic shielding performance of the optical port 32 of the optical module is effectively improved.
With further optimization of the above-mentioned scheme, referring to fig. 5, a second protrusion 31 that can be attached to the pressing block 1 to eliminate the elongated gap protrudes from the inner side wall of the groove. In this embodiment, the groove has a second projection 31 on its inner side wall which can cooperate with the first projection 12 described above to better eliminate the elongated slit.
Embodiment III:
The embodiment of the invention provides a manufacturing method of an optical module, which is characterized by comprising the following steps:
S1, preparing a base 3, a TOSA4, a ROSA5, a pressing block 1 and a sheet metal cover 6 in advance;
S2, mounting the TOSA4 and the ROSA5 on the base 3, pressing the TOSA4 and the ROSA5 on the base 3 by adopting the pressing block 1, and simultaneously installing a shrapnel assembly 2 on the inner side wall 60 of the sheet metal cover;
S3, covering a sheet metal cover 6 provided with the spring plate assembly 2 on the base 3, and pressing the spring plate assembly 2 on the pressing block 1;
In the step S3, the elastic sheet assembly 2 can eliminate the elongated gap between the sheet metal cover 6 and the pressing block 1.
In this embodiment, the pressing block 1 is mounted on the base 3, specifically, the base 3 has a groove into which the pressing block can be clamped, and the TOSA4 (laser) and ROSA5 (probe) are respectively pressed by the first mounting portion 10 and the second mounting portion 11, and since the metal plate cover 6 is covered on the base 3, the elastic sheet component 2 thereon can press against the upper portion of the pressing block 1, and since the elastic sheet component 2 has elasticity, it is elastically deformed after being pressed, so that the elongated gap between the metal plate cover 6 attached to the elastic sheet component is eliminated, good contact can be achieved, the problem that abnormal sound exists in the fixing TOSA4 and ROSA5 of the pressing block 1 in the prior art is overcome, and since the elongated gap is eliminated, the electromagnetic shielding performance of the optical port 32 of the optical module is effectively improved.
The method embodiment includes the features of the first embodiment and the second embodiment, so that other features are not described herein.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. The utility model provides an optical port electromagnetic shield structure of optical module, includes the briquetting that can install on optical module's base, its characterized in that: still including can install on the inside wall of the panel beating lid of optical module the panel beating lid with the shell fragment subassembly in order to eliminate long and thin gap between the briquetting, the shell fragment subassembly is located the top of briquetting, just the shell fragment subassembly supports the pressure the upper portion of briquetting, the briquetting has first installation department and the second installation department that supplies TOSA and ROSA to install respectively, the shell fragment subassembly is including can laminating the connecting piece of panel beating lid's inside wall installation and install a plurality of shell fragments on the connecting piece, each the shell fragment is all including can contact the contact end of the inside wall of panel beating lid.
2. The optical port electromagnetic shielding structure of an optical module according to claim 1, wherein: each elastic piece comprises a first section connected with the edge of the connecting piece and a second section connected with the tail end of the first section, each second section extends towards the direction away from the pressing block, and the tail end of each second section is the contact end.
3. The optical port electromagnetic shielding structure of an optical module according to claim 1, wherein: each elastic piece is distributed at intervals along the length direction of the connecting piece.
4. The optical port electromagnetic shielding structure of an optical module according to claim 1, wherein: the connecting piece is provided with a plurality of welding points which can be welded on the metal plate cover.
5. The optical port electromagnetic shielding structure of an optical module according to claim 1, wherein: the left side and the right side of the pressing block are both protruded with first protrusions which can be attached to the base to eliminate the slender gaps.
6. The optical port electromagnetic shielding structure of an optical module according to claim 1, wherein: a cylinder which can be inserted into the round hole of the base to eliminate the slender gap is arranged between the first installation part and the second installation part of the pressing block.
7. An optical module, includes base, TOSA, ROSA and can cover panel beating lid on the base, its characterized in that: the light port electromagnetic shielding structure of any one of claims 1-6 is characterized in that the base is provided with a groove for the pressing block to be clamped in, and the elastic piece assembly is attached to the pressing block after the metal plate cover is covered on the base.
8. An optical module as recited in claim 7, wherein: and a second bulge which can be attached to the pressing block to eliminate the slender gap is protruded on the inner side wall of the groove.
9. A method for manufacturing an optical module according to any one of claims 7 or 8, comprising the steps of:
S1, preparing a base, a TOSA, a ROSA, a pressing block and a sheet metal cover in advance;
s2, mounting the TOSA and the ROSA on the base, pressing the TOSA and the ROSA on the base by adopting the pressing block, and simultaneously mounting a spring piece assembly on the inner side wall of the sheet metal cover;
S3, covering a metal plate cover provided with an elastic sheet assembly on the base, and pressing the elastic sheet assembly on the pressing block;
in the step S3, the elastic piece assembly can eliminate an elongated gap between the metal plate cover and the pressing block.
CN201910462649.8A 2019-05-30 2019-05-30 Optical port electromagnetic shielding structure of optical module, optical module and manufacturing method of optical module Active CN110121254B (en)

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Publication number Priority date Publication date Assignee Title
CN111897061A (en) * 2020-06-05 2020-11-06 武汉华工正源光子技术有限公司 AOC optical module

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CN106772833A (en) * 2016-12-07 2017-05-31 青岛海信宽带多媒体技术有限公司 A kind of optical module
CN206274709U (en) * 2016-12-02 2017-06-23 东莞铭普光磁股份有限公司 One kind electromagnetic shielding optical module
CN109254360A (en) * 2018-09-30 2019-01-22 武汉联特科技有限公司 Optical transceiver module shell and optical transceiver module
CN210572881U (en) * 2019-05-30 2020-05-19 武汉华工正源光子技术有限公司 Optical module and optical port electromagnetic shielding structure thereof

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CN103001690A (en) * 2012-10-31 2013-03-27 绍兴飞泰光电技术有限公司 Screwless SFP+ optical module
CN106772832A (en) * 2016-11-30 2017-05-31 武汉联特科技有限公司 A kind of integrated module of optical transceiver
CN206274709U (en) * 2016-12-02 2017-06-23 东莞铭普光磁股份有限公司 One kind electromagnetic shielding optical module
CN106772833A (en) * 2016-12-07 2017-05-31 青岛海信宽带多媒体技术有限公司 A kind of optical module
CN109254360A (en) * 2018-09-30 2019-01-22 武汉联特科技有限公司 Optical transceiver module shell and optical transceiver module
CN210572881U (en) * 2019-05-30 2020-05-19 武汉华工正源光子技术有限公司 Optical module and optical port electromagnetic shielding structure thereof

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