CN108736977A - A kind of optical module - Google Patents
A kind of optical module Download PDFInfo
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- CN108736977A CN108736977A CN201810631480.XA CN201810631480A CN108736977A CN 108736977 A CN108736977 A CN 108736977A CN 201810631480 A CN201810631480 A CN 201810631480A CN 108736977 A CN108736977 A CN 108736977A
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- voltage
- partial pressure
- optical module
- multiplexed
- control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/40—Transceivers
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Abstract
The present patent application provides a kind of optical module,Including comparing unit and partial pressure unit,The first input end of comparing unit receives the first control voltage exported through multiplexing pins by host computer,First multiplexed voltage of the first reference voltage control output configured through comparing unit for enabling the first multiplexer mode,The input terminal of partial pressure unit receives the second control level,When second electrical level is the first level,The voltage high exported by multiplexing pins is exported the second multiplexed voltage of enabled second multiplexer mode by partial pressure unit,That the second multiplexed voltage of output is drawn high by partial pressure unit is more than the second reference voltage for being configured at host computer,Pass through set first,Two reference voltages are simultaneously located at by the transmitted voltage of multiplexing pins in different voltages section by comparing unit and partial pressure unit adjustment,To realize the control voltage for enabling different working modes respectively through multiplexing pins output,The control level that pin is transmitted on multiplexing golden finger is to meet the needs of optical module is under different working modes.
Description
Technical field
The present invention relates to technical field of photo communication more particularly to a kind of optical modules.
Background technology
As optical module rate is higher and higher, transmission channel increases therewith, therefore, for realizing optical module and host computer it
Between signal transmission golden finger quantity also corresponding requirements increase.In order to enter more optical modules in standard machine frame interpolation, it is limited
In the requirement of the size of standard machine frame and host computer, the size of optical module can not be excessive, and then limits golden finger on optical module
Pin lays quantity, also accordingly limits the quantity of the different control level transmitted on golden finger so that the work of optical module
Pattern and use function are limited, and difference can not be exported because golden finger pin number is limited by therefore, in existing optical module existing
Control voltage with drive optical module enable different working modes the technical issues of.
Invention content
The present invention provides a kind of optical modules, to solve to have nothing due to golden finger pin number is limited in existing optical module
The technical issues of method exports different control voltage to drive optical module to enable different working modes.
A kind of optical module of the present patent application offer, including comparing unit and partial pressure unit, the first of the comparing unit are defeated
Enter end to connect with multiplexing pins, the first input end receives the first control electricity exported through the multiplexing pins by host computer
Second input terminal of pressure, the comparing unit configures the first reference voltage, the output end control output first of the comparing unit
Multiplexed voltage, first multiplexed voltage is for enabling the first multiplexer mode；The input terminal of the partial pressure unit receives the second control
Voltage processed, the output end of the partial pressure unit are connected with the multiplexing pins；When the second control voltage is the first level,
The output end of the partial pressure unit exports the second multiplexed voltage；When the second control voltage is second electrical level, the partial pressure
The output end output disabling voltage of unit；Second multiplexed voltage is more than the second reference voltage for being configured at the host computer,
Second multiplexed voltage is for enabling the second multiplexer mode, and the disabling voltage is less than second reference voltage, and described the
Two reference voltages are more than first reference voltage.
The present patent application also provides a kind of optical module, including comparing unit and partial pressure unit, and the first of the comparing unit
Input terminal is connect with multiplexing pins, and the first input end receives the first control exported through the multiplexing pins by host computer
Voltage, it is described first control voltage described in comparing unit output end export the first multiplexed voltage, the second of the comparing unit
Input terminal configures the first reference voltage, and the first control voltage is less than first reference voltage, first multiplexed voltage
For enabling the first multiplexer mode；The input terminal of the partial pressure unit receives the second control voltage, the output of the partial pressure unit
End is connected with the multiplexing pins to export the second multiplexed voltage, when the partial pressure unit receives the second control voltage
When, by voltage high that the multiplexing pins are exported to export second multiplexed voltage, second multiplexed voltage is more than
It is configured at the second reference voltage of the host computer, second reference voltage is more than first reference voltage, and described second
Multiplexed voltage is for enabling the second multiplexer mode.
The technical solution that the embodiment of the present invention provides can include the following benefits：
The present invention provides a kind of optical module, including comparing unit and partial pressure unit, and the first input end of comparing unit receives
The the first control voltage exported through multiplexing pins by host computer, the first reference voltage control output configured through comparing unit
The input terminal of the first multiplexed voltage for enabling the first multiplexer mode, partial pressure unit receives the second control level, when the second electricity
Put down for the first level when, partial pressure unit by the voltage high exported by multiplexing pins to export the second multiplexed voltage, by second
Multiplexed voltage enables the second multiplexer mode, otherwise control output disabling voltage, and the second multiplexing electricity of output is drawn high by partial pressure unit
Pressure is more than the second reference voltage for being configured at host computer, and then realizes the control to multiplexing pins institute output voltage, passes through institute
First and second reference voltage is set and different voltages are located at by the transmitted voltage of multiplexing pins by comparing unit and partial pressure unit adjustment
In section, to realize the control voltage for enabling different working modes respectively through multiplexing pins output, draw without increasing golden finger
Under the premise of foot quantity, the control level that pin is transmitted on multiplexing golden finger is to meet optical module under different working modes
Demand enriches the functional mode of optical module, improves optical module overall performance.
It should be understood that above general description and following detailed description is only exemplary and explanatory, not
It can the limitation present invention.
Description of the drawings
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other drawings may also be obtained based on these drawings.
Fig. 1 is optical module structure figure provided in an embodiment of the present invention；
Fig. 2 is circuit diagram provided in an embodiment of the present invention；
Fig. 3 is the level schematic diagram of circuit provided in an embodiment of the present invention.
Specific implementation mode
Here will explanation be executed to exemplary embodiment in detail, the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent and the consistent all embodiments of the present invention.On the contrary, they be only with it is such as appended
The example of the consistent device and method of some aspects being described in detail in claims, of the invention.
Optical module needs to be inserted into equipment machine (host computer) when in use, optical module by golden finger on circuit board with it is upper
Position machine establishes electrical connection, to be powered, the electricity interaction such as data transfer.From the point of view of the industry division of labor, optical module is by optical module manufacturer
It manufactures, host computer is manufactured by host computer manufacturer, is needed according to unification in the part that optical module is connected with host computer
Standard manufactures, and specifically, quantity and the definition that pin is connected on optical module golden finger are consistent with host computer interface.This mark
Although standard is electrically connected convenient for optical module with host computer foundation, the quantity and function of golden finger pin are limited, and then limit
Research and development of the optical module manufacturer to optical module function.
The embodiment of the present invention in order to extend the function and operating mode of optical module, need to increase the quantity of golden finger pin with
The more control level of transmission are constrained to require with the standard of host computer to enable different working modes, can not be from physics
It is upper to increase the quantity of golden finger pin, therefore propose that a kind of pin on golden finger realizes multiplexing functions in the present patent application
Technical solution.
Fig. 1 is optical module structure figure provided in an embodiment of the present invention, as shown in Figure 1, optical mode provided in an embodiment of the present invention
Block includes upper shell 11, lower housing 12 and circuit board 10, and the surface of circuit board 10 is provided with the electricity such as resistance, comparator, power supply
Device, one end of circuit board 10 are provided with optical secondary modules, the other ends such as light emitting secondary module 13, light-receiving secondary module 14 and set
It is equipped with golden finger 15, golden finger 15 is made of multiple pins.For the communications for realizing between optical module and host computer, by light
The golden finger of module is inserted into host computer, the pin of pin and host computer in golden finger realizes electrical contact, wherein optical module
One multiplexing pins 16 are set in the pin of golden finger, and multiplexing pins 16 realize at least two signals/function and drawn by the multiplexing
Foot 16 is transmitted, and correspondingly, host computer equally has multiplexing pins setting corresponding with the multiplexing pins 16 of optical module,
To realize that the multiplexing pins in multiplexing pins and host computer in optical module carry out communications.
When being communicated with host computer, host computer sends out indication signal and enters Reset moulds to control optical module optical module
Formula so that optical module is resetted under Reset patterns, specifically, controlled in host computer the controlling switch of Reset patterns with
The controlled pin of the golden finger of optical module is connected, and the voltage of the controlled pin of optical module golden finger can be changed in host computer, when upper
When the position effective Reset of machine input high level controls level, the controlled pin on optical module golden finger receives the high level
Reset controls level, and optical module is in turn into Reset patterns to be resetted.
Optical module with host computer when being communicated, if detecting exception inside optical module, do not shine as laser is abnormal,
The abnormal light of hair, often shine can not turn off, other abnormal chips of MCU do not work extremely etc., and abnormalities, optical module will export
Fault controls level to host computer, and respective handling mode is determined to solve the exception by host computer, wherein processing mode is such as disconnected
The power supply of light modules exports Disable signals and is handled etc. to optical module or by IIC access optical modules.
In the embodiment of the present invention, the Reset functions of optical module and Fault functions are realized using the same physical pin,
Physical pin, that is, the multiplexing pins, in multiplexing pins, different signals is passed by the way of the time-division by multiplexing pins
It is defeated.
The embodiment of the present invention provides a kind of optical module comprising comparing unit 10 and partial pressure unit 20.Comparing unit 10 wraps
First input end, the second input terminal and output end are included, the first input end of comparing unit 10 is connect with multiplexing pins 16, and first is defeated
Enter end and receives the first control voltage exported through multiplexing pins 16 by host computer, the second input terminal configuration the of comparing unit 10
One reference voltage, output end control the first multiplexed voltage of output of comparing unit 10, the first multiplexed voltage are multiple for enabling first
With pattern, wherein the first multiplexer mode is Reset patterns, and the second multiplexer mode is Fault patterns.Second is configured with reference to electricity
Pressure is more than the first reference voltage, and the operating voltage of multiplexing pins in optical module is divided into three voltage ranges, each voltage range
The switching control to optical module difference multiplexer mode is inside realized respectively, wherein the voltage range divided specifically refers to Fig. 3 institutes
Show, the operating mode and handoff procedure under each voltage range will become clear from the description below.
Specifically, the first input end of comparing unit 10 is connected with multiplexing pins 16, receive by host computer through multiplexing pins
16 the first control voltages exported, comparing unit 10 are controlled according to the magnitude relationship of the first control voltage and the first reference voltage
First multiplexed voltage of output.The anode of comparing unit 10 is first input end, and negative terminal is the second input terminal, received
When first control voltage is less than the first reference voltage, the output end of comparing unit 10 exports the first multiplexed voltage, wherein is exported
The first multiplexed voltage be low level, by the first multiplexed voltage enable the first multiplexer mode, that is, realize the Reset moulds of optical module
Formula.
Specifically, shown in please referring to Fig.2, optical module (Module) includes comparing unit 10 and partial pressure unit 20, relatively list
Member 10 is comparator IC-1, the first input end (i.e. anode) of comparator IC-1 by multiplexing pins 16 on optical module with it is upper
Machine (Host) is connected, and the second input terminal (i.e. negative terminal) of comparator IC-1 configures the first reference voltage 1.25V.
Host computer (Host) include the second buffer (buffer IC-4), comparator IC-3 and 3rd resistor (resistance R3,
In, resistance R3 resistance values are 68K), when host computer (Host) control optical module (Module) enters Reset patterns, by host computer
Buffered device IC-4 and the output of multiplexing pins 16 are low level first control voltage, and the first input end of comparator IC-1 is through multiple
The first control voltage is received with pin, the first control voltage is less than the first configured datum, by the defeated of comparator IC-1
First multiplexed voltage of outlet control output, wherein the first multiplexed voltage is low level, is answered by the first multiplexed voltage enabled first
With pattern, that is, realize the Reset patterns of optical module.When host computer (Host) enters Reset without controlling optical module (Module)
It is the first control voltage of high level by the buffered device IC-4 of host computer and the output of multiplexing pins 16, through multiplexing pins when pattern
16 are transmitted to the first input end of comparator IC-1, at this time first control voltage be more than the first configured datum, by than
First multiplexed voltage of the output end control output compared with device IC-1, wherein the first multiplexed voltage is high level, multiple with disabling first
Use pattern.Optical module receives the first control level exported by host computer through multiplexing pins as a result, and the comparison in optical module is single
Member is according to the first control level and the first datum magnitude relationship to control output first for enabling the first multiplexer mode
Multiplexed voltage, to control the enabled or disabled state of the first multiplexer mode.
The input terminal of partial pressure unit 20 is for receiving the second control voltage, output end and the multiplexing pins 16 of partial pressure unit 20
It is connected, when the second control voltage is the first level, the output end of partial pressure unit 20 exports the second multiplexed voltage, when the second control
When voltage is second electrical level, partial pressure is single, 20 output end output disabling voltage, wherein the second multiplexed voltage, which is more than, to be configured at
Second reference voltage of position machine, the second multiplexed voltage are less than the second reference voltage for enabling the second multiplexer mode, disabling voltage,
Second reference voltage is more than the first reference voltage.
Shown in please referring to Fig.2, partial pressure unit 20 include the first buffer (buffer IC-2), second resistance (resistance R2) and
First resistor (resistance R1).The input terminal of first buffer (buffer IC-2) receives the second control voltage, the second control voltage
The control signal to report an error to host computer is needed when Fault occurs for optical module, when Fault occurs for optical module, the second control electricity
Pressure is high level, and when Fault does not occur for optical module, the second control voltage is low level.First buffer (buffer IC-2)
The first output end be connected with second resistance (resistance R2), the second output terminal of the first buffer (buffer IC-2) ground connection, the
Two resistance (resistance R2) resistance values are 8K, and first resistor (resistance R1) resistance value is 5K.One end of second resistance (resistance R2) and first
First output end of buffer (buffer IC-2) is connected, and the other end is connected with multiplexing pins 16.First resistor (resistance R1)
One end and power supply VCC (power supply VCC is 3.3V) be connected, the other end is connected with multiplexing pins 16.
Specifically, when operation irregularity does not occur for optical module, the first buffer (buffer IC-2) receives the second control electricity
It presses and the second control voltage is second electrical level, exemplary, second electrical level is low level, by through partial pressure unit 20 and by multiplexing pins
16 voltages exported are through first resistor (resistance R1) and second resistance (resistance R2) and 3rd resistor (resistance R3) electricity in parallel
Partial pressure value after resistance (resistance value in parallel with R3 R2 be 68K*8K/ (68K+8K)=7.16K Ω), i.e., it is the to control voltage second
It is 7.16K*3.3V/ (7.16K+5k)=1.94V, disabling electricity by the disabling voltage that multiplexing pins 16 are exported when two level
Pressure, which is less than, is configured at the second reference voltage of comparator IC-3 anodes in host computer, wherein the second reference voltage is 2.5V, by than
High level is exported compared with device IC-3 output ends, light is determined according to the high level exported in comparator IC-3 output ends with this host computer
Module generation without exception, i.e., do not enter Fault patterns.
When operation irregularity occurs for optical module, need to be reported an error to host computer to inform that host computer works as the work of front optical module
Mistake occurs for state, and it is the first level that the first buffer (buffer IC-2), which receives the second control voltage and the second control voltage,
Exemplary, second electrical level is high level, the first buffer (buffer IC-2) in the second control voltage for receiving high level,
First buffer (buffer IC-2) is high-impedance state, and the first output end is vacant state, correspondingly, with the first buffer
One end of the connected second resistance (resistance R2) of first output end of (buffer IC-2) is also hanging, as a result, through multiplexing pins
16 voltages transmitted are the partial pressure of first resistor (resistance R1) and 3rd resistor (resistance R3), i.e., work do not occur with optical module
When abnormal, i.e., when the second control voltage is second electrical level (low level), is drawn high by partial pressure unit 20 and transmitted through multiplexing pins 16
The second multiplexed voltage be 68K*3.3V/ (68K+5K)=3.07V, be more than be configured at comparator IC-3 anodes in host computer
Second reference voltage 2.5V enables the second multiplexer mode (Fault patterns), by comparator IC-3 output ends by the second multiplexed voltage
Low level is exported, determines that optical module occurs extremely according to the low level exported in comparator IC-3 output ends with this host computer,
Enter Fault patterns.Meanwhile the second multiplexed voltage (3.07V) transmitted through multiplexing pins is more than the first datum, light
Module will not enter the first multiplexer mode.It is received as a result, positioned at varying level position in its receiving terminal by partial pressure unit 20
When the second control voltage, the voltage transmitted to host computer via multiplexing pins is controlled, when optical module generation work is different
Chang Shi, draws high voltage by partial pressure unit 20 and is larger than and be configured at the second reference voltage of upper computer end, to enable optical module
Second multiplexer mode, i.e. Fault patterns.
In conclusion a kind of optical module of present invention offer, including comparing unit and partial pressure unit, the first of comparing unit are defeated
Enter end and receives the first control voltage exported through multiplexing pins by host computer, the first reference voltage configured through comparing unit
The input terminal of first multiplexed voltage of the control output for enabling the first multiplexer mode, partial pressure unit receives the second control level,
When second electrical level is the first level, partial pressure unit is by the voltage high exported by multiplexing pins to export the second multiplexing electricity
Pressure enables the second multiplexer mode by the second multiplexed voltage, otherwise control output disabling voltage, and the of output is drawn high by partial pressure unit
Two multiplexed voltages are more than the second reference voltage for being configured at host computer, and then realize the control to multiplexing pins institute output voltage
System, by set first and second reference voltage and by comparing unit and partial pressure unit adjustment by the transmitted voltage position of multiplexing pins
In in different voltages section, the control voltage for enabling different working modes respectively is exported through multiplexing pins to realize, without increasing
Under the premise of adding golden finger pin number, the control level that pin is transmitted on multiplexing golden finger is to meet optical module in different works
Demand under operation mode enriches the functional mode of optical module, improves optical module overall performance.
Those skilled in the art will readily occur to its of the present invention after considering specification and putting into practice the disclosure invented here
Its embodiment.This application is intended to cover the present invention any variations, uses, or adaptations, these modifications, purposes or
Person's adaptive change follows the general principle of the present invention and includes undocumented common knowledge in the art of the invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be understood that the relational terms of such as " first " and " second " or the like be used merely to an entity or
Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any
This actual relationship or sequence.The invention is not limited in the precision architecture for being described above and being shown in the accompanying drawings,
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is only limited by the attached claims
System.
Claims (7)
1. a kind of optical module, which is characterized in that including comparing unit and partial pressure unit,
The first input end of the comparing unit is connect with multiplexing pins, and the first input end is received by host computer through described multiple
The the first control voltage exported with pin, the second input terminal of the comparing unit configure the first reference voltage, the comparison
Output end control the first multiplexed voltage of output of unit, first multiplexed voltage is for enabling the first multiplexer mode；
The input terminal of the partial pressure unit draws for receiving the second control voltage, the output end of the partial pressure unit with the multiplexing
Foot is connected；
When the second control voltage is the first level, the output end of the partial pressure unit exports the second multiplexed voltage；Work as institute
State the second control voltage be second electrical level when, the partial pressure unit output end output disabling voltage；
Second multiplexed voltage is more than the second reference voltage for being configured at the host computer, and second multiplexed voltage is for making
The second multiplexer mode of energy, the disabling voltage are less than second reference voltage, and second reference voltage is more than described first
Reference voltage.
2. a kind of optical module, which is characterized in that including comparing unit and partial pressure unit,
The first input end of the comparing unit is connect with multiplexing pins, and the first input end is received by host computer through described multiple
The the first control voltage exported with pin, the output end of the comparing unit export the first multiplexed voltage, the comparing unit
The second input terminal configure the first reference voltage, the first control voltage is less than first reference voltage, and described first is multiple
With voltage for enabling the first multiplexer mode；
The input terminal of the partial pressure unit receives the second control voltage, the output end of the partial pressure unit and the multiplexing pins phase
Even to export the second multiplexed voltage, when the partial pressure unit receives the second control voltage, by the multiplexing pins institute
For the voltage high of output to export second multiplexed voltage, second multiplexed voltage, which is more than, is configured at the of the host computer
Two reference voltages, second reference voltage are more than first reference voltage, and second multiplexed voltage is for enabling second
Multiplexer mode.
3. optical module according to claim 1, which is characterized in that the comparing unit according to it is described first control voltage and
The magnitude relationship control of first reference voltage exports first multiplexed voltage, and the first input end is anode, described
Second input terminal is negative terminal, when the first control voltage is less than first reference voltage, the output of the comparing unit
End exports first multiplexed voltage.
4. optical module according to claim 1 or 2, which is characterized in that the partial pressure unit includes second resistance and first
First output end of buffer, first buffer is connected with the second resistance, the second output of first buffer
End ground connection, the other end of the second resistance are connected with the reset pin, when the second control voltage is second electrical level,
First buffer is high-impedance state.
5. optical module according to claim 1, which is characterized in that first multiplexer mode is Reset patterns, described the
Two multiplexer modes are Fault patterns.
6. optical module according to claim 1, which is characterized in that further include first resistor, one end of the first resistor
It is connected with the reset pin, the other end is connected with power supply.
7. optical module according to claim 1, which is characterized in that the comparing unit is comparator.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2019/080464 WO2019185031A1 (en) | 2018-03-29 | 2019-03-29 | Optical module |
| EP19774767.8A EP3694119B1 (en) | 2018-03-29 | 2019-03-29 | Optical module |
| US16/503,274 US10637577B2 (en) | 2018-03-29 | 2019-07-03 | Optical module |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810268535 | 2018-03-29 | ||
| CN2018102685355 | 2018-03-29 |
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| Publication Number | Publication Date |
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| CN108736977A true CN108736977A (en) | 2018-11-02 |
| CN108736977B CN108736977B (en) | 2021-05-11 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810631480.XA Active CN108736977B (en) | 2018-03-29 | 2018-06-19 | Optical module |
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| WO2019185031A1 (en) * | 2018-03-29 | 2019-10-03 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN110412927A (en) * | 2019-08-23 | 2019-11-05 | 深圳市欧深特信息技术有限公司 | A kind of optical module is in position detecting method and optical module |
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| WO2022041917A1 (en) * | 2020-08-27 | 2022-03-03 | 青岛海信宽带多媒体技术有限公司 | Optical module |
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| US10637577B2 (en) | 2018-03-29 | 2020-04-28 | Hisense Broadband Multimedia Technologies Co., Ltd. | Optical module |
| CN111865423A (en) * | 2019-04-24 | 2020-10-30 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN111865423B (en) * | 2019-04-24 | 2021-06-04 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN110412927A (en) * | 2019-08-23 | 2019-11-05 | 深圳市欧深特信息技术有限公司 | A kind of optical module is in position detecting method and optical module |
| CN110412927B (en) * | 2019-08-23 | 2024-07-26 | 深圳市欧深特信息技术有限公司 | Optical module in-place detection method and optical module |
| WO2022041917A1 (en) * | 2020-08-27 | 2022-03-03 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN112039593A (en) * | 2020-09-07 | 2020-12-04 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN112039593B (en) * | 2020-09-07 | 2021-11-12 | 青岛海信宽带多媒体技术有限公司 | Optical module |
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| CN108736977B (en) | 2021-05-11 |
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