CN215575772U - Integrated wavelength division multiplexing device, laser guide module and laser communication system - Google Patents
Integrated wavelength division multiplexing device, laser guide module and laser communication system Download PDFInfo
- Publication number
- CN215575772U CN215575772U CN202120633975.3U CN202120633975U CN215575772U CN 215575772 U CN215575772 U CN 215575772U CN 202120633975 U CN202120633975 U CN 202120633975U CN 215575772 U CN215575772 U CN 215575772U
- Authority
- CN
- China
- Prior art keywords
- laser
- light splitting
- filter
- splitting device
- division multiplexing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004891 communication Methods 0.000 title claims abstract description 14
- 239000012528 membrane Substances 0.000 claims description 40
- 230000005540 biological transmission Effects 0.000 claims description 9
- 230000003287 optical effect Effects 0.000 claims description 9
- 230000003993 interaction Effects 0.000 claims description 3
- 230000010354 integration Effects 0.000 abstract description 7
- 239000013307 optical fiber Substances 0.000 abstract description 6
- 238000001914 filtration Methods 0.000 description 5
- 239000000835 fiber Substances 0.000 description 4
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000000253 optical time-domain reflectometry Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Landscapes
- Optical Couplings Of Light Guides (AREA)
Abstract
The utility model relates to the technical field of optical fiber communication, and discloses an integrated wavelength division multiplexing device, a laser guide module and a laser communication system. The utility model has the advantages that when the laser generating source emits laser to the primary light splitting device, the primary light splitting device is utilized to split the laser into a first light splitting beam and the rest light is incident to the primary output collimator, the first light splitting beam is transmitted to the other output collimator through the secondary light splitting device and split into a second light splitting beam to be sent to the tertiary light splitting device, and the primary light splitting device, the secondary light splitting device and the tertiary light splitting device are all arranged on the main body, so that the integration level of a plurality of light splitting devices can be improved.
Description
Technical Field
The utility model relates to the technical field of optical fiber communication, in particular to an integrated wavelength division multiplexing device, a laser guide module and a laser communication system.
Background
With the large-scale application and development of optical fiber communication technology, new services such as voice, video and internet three-in-one and video on demand are continuously increasing, and higher requirements are put forward on the transmission speed and the instant transmission capacity of an optical fiber system; wavelength Division Multiplexing (WDM) requires high integration and clean channels to support the development of FTTH networks under the advantages of ground equipment cost and low power consumption; laser layering refers to separating lasers in different wave bands according to rules; the common wavelength division multiplexing module adopts a double-fiber collimator, a single-fiber collimator and a unit formed by a Wavelength Division Multiplexing (WDM) diaphragm to be connected in series to form a Coarse Wavelength Division Multiplexing (CWDM) module and a Dense Wavelength Division Multiplexing (DWDM) module.
At present, a wavelength division multiplexing membrane in a wavelength division multiplexing module needs to be stacked by a plurality of single-fiber receiving collimators to realize multilayer wavelength division multiplexing, and the plurality of receiving collimators are separated by adopting a form of a light splitting device to realize the combined use of non-stacked receiving collimators.
In the prior art, for example, a single-fiber bidirectional optical transceiver integrated component for an OLT module with application number CN102811097A and an OLT optical component for an integrated OTDR with application number CN202453549U all use optical splitters to implement forwarding multiplexing of light, but the optical splitters are respectively connected with an external fixed structure and distributed; however, in the single optical fiber bidirectional transmission module with built-in OTDR function as CN203519885U, the method of placing the optical splitter in a fixed cavity is adopted, but the optical splitters are only distributed, which results in low space utilization and low integration.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an integrated wavelength division multiplexing device, a laser guide module and a laser communication system, and aims to solve the problem that the wavelength division multiplexing integration level is not high enough in the prior art.
The present invention is achieved in such a way that,
an integrated wavelength division multiplexing device comprises a main body, a laser generating source, a multi-stage output collimator, a first-stage light splitting device, a second-stage light splitting device and a third-stage light splitting device, wherein the first-stage light splitting device, the second-stage light splitting device and the third-stage light splitting device are arranged on the main body, and the light splitting surface of the first-stage light splitting device and the light splitting surface of the second-stage light splitting device are relatively vertical or nearly vertical; wherein,
laser signal that the laser generating source takes place passes through in proper order one-level beam splitting device incides to one-level output collimator, and is split into first beam splitting light beam and passes through second beam splitting device incides second grade output collimator, and second beam splitting device will first beam splitting light beam split becomes second beam splitting light beam, incides tertiary beam splitting device.
The laser device also comprises a first incidence filter membrane and a second incidence filter membrane, wherein the first incidence filter membrane is connected with the light splitting surface of the primary light splitting device at an angle of 45 degrees or nearly 45 degrees, and the first incidence filter membrane is perpendicular to the laser; the second incident filter membrane is connected with the light splitting surface of the secondary light splitting device at an angle of 45 degrees or an angle close to 45 degrees, and the first incident filter membrane and the second incident filter membrane are installed on the main body to filter laser.
Preferably, the optical splitter further comprises a first emergence filter membrane and a second emergence filter membrane, the first emergence filter membrane and the second emergence filter membrane are mounted on the main body, the first emergence filter membrane and the first incidence filter membrane are arranged vertically relatively, the second emergence filter membrane and the second emergence filter membrane are arranged vertically relatively, and the first emergence filter membrane and the second emergence filter membrane are connected with the beam splitter of the beam splitter at an angle of 45 degrees or an angle close to 45 degrees.
Preferably, the main body comprises a first frame body and a second frame body, the first frame body and the second frame body are arranged in a cross manner, and the first frame body is fixedly connected with the second frame body; the two ends of the first-stage light splitting device and the two ends of the second-stage light splitting device are respectively connected with one end of the first frame body and one end of the second frame body.
Preferably, the first frame body and the second frame body are arranged in a hollow frame shape, the first incident filter membrane is arranged at the edge of the first frame body, and the second incident filter membrane is arranged at the edge of the second frame body.
Preferably, the second-order light splitter is a total reflection mirror, and the first split light beam split by the first-order light splitter is reflected by the first incidence filter membrane and then enters the output collimator.
Preferably, the optical fiber module further comprises a light filtering device, and a light filtering surface of the light filtering device is perpendicular to a light splitting surface of the secondary light splitting device.
In a second aspect, the present invention provides a laser guiding module, which includes the above-mentioned integrated wavelength division multiplexing device, a laser generating source, and at least one output collimator, wherein after the laser emitted from the laser generating source is split by the primary light splitter, the split laser is guided to the output collimator by the integrated wavelength division multiplexing device, so as to improve the purity of the laser band.
In a third aspect, the present invention provides a laser communication system, including the above-mentioned laser transmission module, laser generation module and laser reception module, where the laser generation module, the laser transmission module and the laser reception module are connected in sequence to implement laser interaction.
Compared with the prior art, the integrated wavelength division multiplexing device, the laser conduction module and the laser communication system provided by the utility model have the advantages that by arranging the primary light splitting device and the secondary light splitting device, when the laser generating source emits laser to the primary light splitting device, the primary light splitting device is used for splitting the laser into the first light splitting beam and the rest of the laser to be incident to the primary output collimator, the first light splitting beam is transmitted to the other output collimator through the secondary light splitting device and splitting the second light splitting beam to be sent to the tertiary light splitting device, the primary light splitting device and the secondary light splitting device are used for hierarchically emitting the laser to the corresponding receiving collimator, and the integration level of a plurality of light splitting devices can be improved as the primary light splitting device, the secondary light splitting device and the tertiary light splitting device are all arranged on the main body.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic top view of an integrated wavelength division multiplexing device according to an embodiment of the present invention;
fig. 2 is a schematic top view of an integrated wavelength division multiplexing device according to an embodiment of the present invention;
fig. 3 is a schematic top view of an integrated wavelength division multiplexing device according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Fig. 1 shows a preferred embodiment of an integrated wavelength division multiplexing device according to the present invention.
An integrated wavelength division multiplexing device comprises a main body 50, a laser generating source 40, a multi-stage output collimator 30, a first-stage light splitting device 10, a second-stage light splitting device 20 and a third-stage light splitting device, wherein the first-stage light splitting device 10 is arranged on the main body 50, and a light splitting surface 70 of the first-stage light splitting device 10 is relatively vertical or approximately vertical to a light splitting surface 70 of the second-stage light splitting device 20; wherein, the laser signal L1 generated by the laser generating source 40 sequentially passes through the first-stage light splitting device 10 to enter the first-stage output collimator 30, and is split into the first split beam L11 to enter the second-stage output collimator 30 through the second-stage light splitting device 20, and the second-stage light splitting device 20 splits the first split beam L11 into the second split beam to enter the third-stage light splitting device 30; by arranging the primary light splitting device 10 and the secondary light splitting device 20, when the laser generating source 40 emits the laser L1 to the primary light splitting device 10, the primary light splitting device 10 is used for splitting the laser L1 into the first light splitting beam L11 and the rest of the light enters the primary output collimator 30, the first light splitting beam L11 is transmitted to the other output collimator 30 and the second light splitting beam is transmitted to the tertiary light splitting device through the secondary light splitting device 20, the primary light splitting device 10 and the secondary light splitting device 20 are used for hierarchically emitting the laser to the corresponding receiving collimator, and the integration of a plurality of light splitting devices can be improved because the primary light splitting device 10, the secondary light splitting device 20 and the tertiary light splitting device are all arranged on the main body 50.
In this embodiment, the integrated wavelength division multiplexing device further includes a first incident filter and a second incident filter, the first incident filter is connected to the splitting plane 70 of the first-stage optical splitter 10 at an angle of 45 degrees or close to 45 degrees, and the first incident filter is perpendicular to the laser L1; the second incident filter membrane is connected with the splitting surface 70 of the secondary light splitter 20 at an angle of 45 degrees or an angle close to 45 degrees, and the first incident filter membrane and the second incident filter membrane are mounted on the main body 50 to filter the laser light, so that the laser light L1 emitted by the first filtered laser generating source 40 is incident on the splitting surface 70 of the primary light splitter 10 at an angle of 45 degrees, the primary light splitter 10 splits the laser light L1 into a first splitting light beam L11 and an incident light beam L12, the incident light beam L12 is transmitted to the output collimator 30, and the first splitting light beam L11 passes through the second incident filter membrane and then reaches the secondary light splitter 20 to be split and then reaches another output collimator 30; by arranging the primary light splitting device 10 and the secondary light splitting device 20, when the laser generating source 40 emits laser to the primary light splitting device 10, the first incident filter membrane is utilized to filter the laser L1 once to improve the laser purity, the primary light splitting device 10 is utilized to split the laser into a first light splitting beam L11 and an incident beam L12, the incident beam L12 is transmitted to the output collimator 30, the first light splitting beam L11 is transmitted to another output collimator 30 through the secondary light splitting device 20, the primary light splitting device 10 and the secondary light splitting device 20 are utilized to sequentially filter and layer the laser L1 according to wave bands in the primary light splitting device 10 and the secondary light splitting device 20, stray light in the laser is filtered and coupled and output to the plurality of output collimators 30 step by step, and the laser purity when the laser is grouped is ensured.
In this embodiment, the laser generating source 40 and the output collimator 30 perform beam modulation in a direct dual manner, which is convenient for arrangement in a collimator array manner; specifically, the first incident filter and the first-stage beam splitter 10 and the second incident filter and the second-stage beam splitter 20 are arranged in 45-degree connection with the splitting surface 70, and the incident angle of the laser beam emitted by the laser generation source 40 or the incident angle of the second split beam L11 and the incident filter is 90-degree, so that the problem of beam dispersion caused by the oblique incident filter can be reduced.
Not shown in the drawings, an integrated wavelength division multiplexing device further includes a first exit filter and a second exit filter, the exit filter is vertically connected to the incident filter, the first exit filter and the second exit filter are mounted on the main body 50, the first exit filter and the first incident filter are vertically arranged, the second exit filter and the second exit filter are vertically arranged, and are connected to the splitting surface 70 of the light splitting device at an angle of 45 degrees or close to 45 degrees, when the laser is transmitted among the first-stage light splitting device 10, the second-stage light splitting device 20, and even the third-stage light splitting device, the laser passes through the first incident filter, the first exit filter, the second incident filter and the second exit filter in sequence, so as to further filter the stray light in the laser, and thus the purity of the laser when the laser is transmitted in the integrated wavelength division multiplexing device can be improved, the laser is not required to be purified by external elements, so that the high integration level of the integrated wavelength division multiplexing device is ensured, and the production is convenient.
In this embodiment, the integrated wavelength division multiplexing device further includes a main body 50, the main body 50 includes a first frame body 51 and a second frame body 52, the first frame body 51 and the second frame body 52 are arranged in a cross manner, and the first frame body 51 and the second frame body 52 are fixedly connected; one-level beam splitter 10, the both ends of second grade beam splitter 20 are connected with the one end of first support body 51 and second support body 52 respectively, furtherly, the one end of one-level beam splitter 10 is connected with the one end of first support body 51, the other end of one-level beam splitter 10, and the one end of second grade beam splitter 20 all is connected with the one end of second support body 52, and the other end of second grade beam splitter 20 is connected with the other end of first support body 51, can realize like this that one-level beam splitter 10 and second grade beam splitter 20 are fixed.
In this embodiment, the first frame body 51 and the second frame body 52 are arranged in a hollow frame shape, the first incident filter membrane is arranged to be connected with the first frame body 51, and the second incident filter membrane is arranged to be connected with the second frame body 52; specifically, the first exit filter membrane is arranged in a manner of being connected with the second frame body 52, and the second exit filter membrane is arranged in a manner of being connected with the first frame body 51; specifically, the first frame body 51 and the second frame body 52 are made of alumina ceramic plates with small thermal expansion coefficients by an injection molding process; wherein the first frame body 51 and the second frame body 52 are integrally positioned and fixed by adopting a groove splicing and UV glue fixing mode.
Specifically, the first incident filter membrane and the second exit filter membrane are embedded in the first frame body 51, and the second incident filter membrane and the first exit filter membrane are embedded in the second frame body 52; further, windows are formed on the first frame body 51 and the second frame body 52, the incident filter membrane is embedded in the window of the first frame body 51, and the emergent filter membrane is embedded in the window of the second frame body 52.
Fig. 2 shows a preferred embodiment of an integrated wavelength division multiplexing device according to the present invention.
The integrated wavelength division multiplexing device further comprises a filter element 60, a filter surface of the filter element 60 is perpendicular to a splitting surface 70 of the secondary light splitter 20, the filter element 60 is mounted on the main body 50, and by arranging the special filter element 60, after laser sequentially passes through the primary light splitter 10 and the secondary light splitter 20, the laser can be finally filtered through the filter element 60, so that purer coupled laser is obtained, and the device is very convenient.
Fig. 3 shows a preferred embodiment of an integrated wavelength division multiplexing device according to the present invention.
The second-stage light splitting device 20 is a total reflection mirror, and the first light splitting beam L11 split by the first-stage light splitting device 10 is reflected by the incident filter membrane and then enters the output collimator 30, so that the first-stage light splitting device 10 and the second-stage light splitting device 20 are combined together to perform secondary light splitting and filtering on laser only, and the requirement of only secondary light splitting or two-layer light splitting and filtering is met.
Also not shown in the drawings is a preferred embodiment of a laser guide module:
a laser guide module comprises the integrated wavelength division multiplexing device, a laser generating source 40 and at least one output collimator 30, wherein laser emitted by the laser generating source is split by a first-stage light splitting device 10, and then the split laser is transmitted to the output collimator 30 by the integrated wavelength division multiplexing device, so that the purity of a laser waveband is improved; the laser is layered and filtered by an integrated wavelength division multiplexing device and then is respectively output to the output collimator 30, which is very convenient.
Also a preferred embodiment of a laser communication system is not shown in the drawings.
A laser communication system comprises the laser transmission module, the laser generation module and the laser receiving module, wherein the laser generation module, the laser transmission module and the laser receiving module are connected in sequence to realize laser interaction; through setting up laser generation module, laser receiving module, laser conduction module transmits the laser that laser generation module took place to laser receiving module through laser conduction module conduction, has guaranteed laser communication's efficiency, and is very convenient.
In addition, the first, second, etc. sequence terms noted in the above are not used to define the sequence between the objects, and are used only as identifying terms, and the specific object arrangement position and spatial relationship are defined by the orientation in the text.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. An integrated wavelength division multiplexing device is characterized by comprising a main body, a laser generating source, a multi-stage output collimator, a primary light splitting device, a secondary light splitting device and a tertiary light splitting device, wherein the primary light splitting device, the secondary light splitting device and the tertiary light splitting device are arranged on the main body, and the light splitting surface of the primary light splitting device and the light splitting surface of the secondary light splitting device are relatively vertical or nearly vertical; wherein,
laser signal that the laser generating source takes place passes through in proper order one-level beam splitting device incides to one-level output collimator, and is split into first beam splitting light beam and passes through second beam splitting device incides second grade output collimator, and second beam splitting device will first beam splitting light beam split becomes second beam splitting light beam, incides tertiary beam splitting device.
2. The integrated wavelength division multiplexing device as claimed in claim 1, further comprising a first incident filter and a second incident filter, wherein the first incident filter is disposed at an angle of 45 degrees or close to 45 degrees with respect to the splitting plane of the primary light splitting device, and the first incident filter is disposed perpendicular to the laser; the second incident filter membrane is connected with the light splitting surface of the secondary light splitting device at an angle of 45 degrees or an angle close to 45 degrees, and the first incident filter membrane and the second incident filter membrane are installed on the main body to filter laser.
3. The integrated wavelength division multiplexing device according to claim 2, further comprising a first exit filter and a second exit filter, wherein the first exit filter and the second exit filter are mounted on the main body, the first exit filter and the first entrance filter are disposed vertically, the second exit filter and the second exit filter are disposed vertically, and the first exit filter and the second exit filter are disposed at an angle of 45 degrees or close to 45 degrees with respect to the splitting plane of the light splitting device.
4. The integrated wavelength division multiplexing device according to claim 3, wherein the main body comprises a first frame and a second frame, the first frame and the second frame are disposed in a crisscross manner, and the first frame and the second frame are fixedly connected; the two ends of the first-stage light splitting device and the two ends of the second-stage light splitting device are respectively connected with one end of the first frame body and one end of the second frame body.
5. The integrated wavelength division multiplexing device as claimed in claim 4, wherein the first frame and the second frame are hollow, the first incident filter is disposed adjacent to the first frame, and the second incident filter is disposed adjacent to the second frame.
6. The integrated wavelength division multiplexing device according to claim 2, wherein the second-order light splitting device is a total reflection mirror, and the first split light beam split by the first-order light splitting device is reflected by the first incidence filter and then enters the output collimator.
7. The integrated wavelength division multiplexing device according to claim 1 or 2, further comprising a filter device, wherein a filter surface of the filter device is perpendicular to a splitting surface of the secondary light splitting device.
8. A laser guide module comprising an integrated wavelength division multiplexing device as claimed in any one of claims 1 to 7, a laser generating source and at least one output collimator, wherein the laser generating source is configured to split laser light by the primary optical splitter and then guide the split laser light to the output collimator by the integrated wavelength division multiplexing device, so as to improve the purity of the laser band.
9. A laser communication system, comprising the laser transmission module, the laser generation module and the laser receiving module according to claim 8, wherein the laser generation module, the laser transmission module and the laser receiving module are connected in sequence to realize laser interaction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120633975.3U CN215575772U (en) | 2021-03-29 | 2021-03-29 | Integrated wavelength division multiplexing device, laser guide module and laser communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120633975.3U CN215575772U (en) | 2021-03-29 | 2021-03-29 | Integrated wavelength division multiplexing device, laser guide module and laser communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215575772U true CN215575772U (en) | 2022-01-18 |
Family
ID=79854968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120633975.3U Active CN215575772U (en) | 2021-03-29 | 2021-03-29 | Integrated wavelength division multiplexing device, laser guide module and laser communication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215575772U (en) |
-
2021
- 2021-03-29 CN CN202120633975.3U patent/CN215575772U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8540437B2 (en) | Multi-wavelength optical transmitting and receiving modules | |
| CN203301489U (en) | Light emitting device possessing multipath wavelength channels, light receiving element possessing multipath wavelength channels and optical module | |
| CN107065083B (en) | Multichannel optical transceiving integrated module | |
| EP3088928B1 (en) | Optical transceiver and optical communications product | |
| WO2018170828A1 (en) | Bidirectional optical assembly, optical network unit, optical line terminal, and passive optical network system | |
| US7991290B2 (en) | Optical prism and optical transceiver module for optical communications | |
| EP2642671B1 (en) | Optical communication module | |
| EP3063574B1 (en) | Multiplexed optoelectronic engines | |
| US6769816B2 (en) | Multi-wavelength transceiver device with integration on transistor-outline cans | |
| US20080031625A1 (en) | WDM hybrid splitter module | |
| KR102011337B1 (en) | module for receiving multi channel optical signal | |
| KR20140079540A (en) | Optical receiver module using wavelength division multiplexing type | |
| KR20200059356A (en) | Multi-channel bidirectional optical communication module | |
| JP2005309370A (en) | Optical module, optical multiplexer/demultiplexer, and optical multiplexing/demultiplexing unit using it | |
| US20120213527A1 (en) | Optoelectronic device for bidirectionally transporting information through optical fibers and method of manufacturing such a device | |
| US20030215240A1 (en) | Optical WDM with single mode tolerance and low profile | |
| WO2022213810A1 (en) | Wavelength-division multiplexing device and communication device | |
| CN108551372B (en) | Multi-wavelength space dislocation divides and closes ripples module | |
| CN215575772U (en) | Integrated wavelength division multiplexing device, laser guide module and laser communication system | |
| US9804346B2 (en) | Receptacle-collimator assembly and multi-wavelength optical receiver module | |
| CN111624713A (en) | Wavelength division multiplexing module and wavelength division multiplexer | |
| CN216285821U (en) | Multichannel polarization-maintaining compact type wavelength division multiplexer module | |
| CN210666094U (en) | Multi-wavelength splitting receiving module | |
| CN116068700A (en) | Wavelength division multiplexing device | |
| CN109802745B (en) | 8-channel wavelength division multiplexing/demultiplexing device for 200G/400G optical transceiver module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 518000 No. 35, Cuijing Road, Pingshan New District, Shenzhen, Guangdong Patentee after: Ona Technology (Shenzhen) Group Co.,Ltd. Address before: No.35 Cuijing Road, Pingshan District, Shenzhen City, Guangdong Province Patentee before: O-NET COMMUNICATIONS (SHENZHEN) Ltd. |
|
| CP03 | Change of name, title or address |