CN110445537A - Emit optical power monitoring circuit, method, apparatus and optical module - Google Patents
Emit optical power monitoring circuit, method, apparatus and optical module Download PDFInfo
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- CN110445537A CN110445537A CN201910839965.2A CN201910839965A CN110445537A CN 110445537 A CN110445537 A CN 110445537A CN 201910839965 A CN201910839965 A CN 201910839965A CN 110445537 A CN110445537 A CN 110445537A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 135
- 238000012544 monitoring process Methods 0.000 title claims abstract description 125
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 76
- 230000005540 biological transmission Effects 0.000 claims abstract description 35
- 230000005611 electricity Effects 0.000 claims description 10
- 238000012806 monitoring device Methods 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
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- 239000004744 fabric Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
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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
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07955—Monitoring or measuring power
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Abstract
The present invention provides a kind of transmitting optical power monitoring circuit, method, apparatus and optical module, the circuit includes: optical transmission circuit, light detection circuit, power monitoring unit, reference voltage circuit and anti-bias circuit；Wherein, the reference voltage circuit, for applying reference voltage；The anti-bias circuit, for applying reversed bias voltage；The optical transmission circuit is used for the light detection circuit output luminous energy；The light detection circuit for receiving the luminous energy of the optical transmission circuit output, and converts back facet current for the luminous energy；The power monitoring unit for monitoring the electric receiving end of the light detection circuit to obtain monitoring voltage, and obtains the current value of the back facet current according to the monitoring voltage, reversed bias voltage and reference voltage.The present invention also proposes a kind of transmitting optical power monitoring method, apparatus and optical module, and this invention simplifies existing transmitting optical power monitoring circuit, wiring is easy, and component is few, consumes energy low.
Description
Technical field
The present invention relates to optical power monitoring technical field more particularly to a kind of transmitting optical power monitoring circuits, method, apparatus
And optical module.
Background technique
Currently, the monitoring of the transmitting optical power of laser is general using the back to match with laser inside optical module
The photoelectric current that optical diode generates is monitored, and photoelectric current is bigger, indicate that the transmitting optical power of laser is bigger.Monitoring Design
Precision be generally determined by the hardware connection mode of backlight diode, generally there are several types of: 1. diode cathode pulls up VCC,
Anode is external；2. being grounded under diode anode, cathode is external；3. diode cathode is external with anode；4. under diode cathode
Ground connection.
In four kinds of above-mentioned connection types, for first three, backlight diode can be directly connected to laser drive
On the input port of dynamic chip, and the 4th kind cannot be directly connected to, and need to be indirectly connected with using some means.At present using to pipe
The method of mirror image, but be usually the size of 2*2 to the encapsulation of pipe, it is also necessary to additional resistance.Above-mentioned backlight diode cathode connects
The optical assembly on ground is commonly used in electrical modulation optical module, and the circuit of this module is complicated, and component is more, and fabric swatch is difficult, thus lacks
A kind of few component is few, occupies the few design scheme in plate face space.
Above content is only used to facilitate the understanding of the technical scheme, and is not represented and is recognized that above content is existing skill
Art.
Summary of the invention
The main purpose of the present invention is to provide one kind, it is intended to solve to connect under transmitting optical power monitoring circuit diode cathode
Technical problem more than ground mode circuit complexity component.
To achieve the above object, the present invention provides a kind of transmitting optical power monitoring circuit, the circuit includes: light emitting
Circuit, light detection circuit, power monitoring unit, reference voltage circuit and anti-bias circuit；The output end of the optical transmission circuit and
The optical receiving end of the light detection circuit couples, and the output end of the light detection circuit and the input terminal of the anti-bias circuit connect
It connects, the monitoring of the electric receiving end of the light detection circuit and the output end of the reference voltage circuit and the power monitoring unit
End connection, wherein
The reference voltage circuit, for applying reference voltage to the electric receiving end of the light detection circuit；
The anti-bias circuit, for applying reversed bias voltage to the output end of the light detection circuit；
The optical transmission circuit is used for the light detection circuit output luminous energy；
The light detection circuit for receiving the luminous energy of the optical transmission circuit output, and converts back for the luminous energy
Photoelectric current；
The power monitoring unit, for monitoring the electric receiving end of the light detection circuit to obtain monitoring voltage, and root
The current value of the back facet current is obtained according to the monitoring voltage, the reversed bias voltage and the reference voltage.
Preferably, the optical transmission circuit includes laser drive unit, laser and optical module；Wherein,
The control terminal of the laser drive unit is connected with the controlled end of the laser, the output end of the laser
It is connected with the input terminal of the optical module, the output end of the optical module and light detection circuit coupling.
Preferably, the light detection circuit includes backlight diode and second resistance；Wherein,
The output end coupling of the optical receiving end and the optical transmission circuit of the backlight diode, the backlight diode
The anode of minus earth, the backlight diode is connected with the input terminal of the anti-bias circuit；The first end of the second resistance
It is connected with the anode of the backlight diode, the output end and institute of the second end of the second resistance and the reference voltage circuit
State the monitoring side connection of power monitoring unit.
Preferably, the reference voltage circuit includes reference voltage unit and 3rd resistor；Wherein,
The first end of the 3rd resistor is connected with the output end of the reference voltage unit, and the second of the 3rd resistor
End is connected with the second end of the second resistance, monitoring side of the second end of the 3rd resistor also with the power monitoring unit
Connection.
Preferably, the anti-bias circuit includes charge pump and first resistor；Wherein,
The first end of the first resistor is connected with the first end of the anode of the backlight diode and the second resistance,
The second end of the first resistor is connected with the output end of the charge pump.
In addition, to achieve the above object, the present invention also proposes a kind of transmitting optical power monitoring method, which comprises
Reference voltage circuit applies reference voltage to the electric receiving end of light detection circuit；
Anti-bias circuit applies reversed bias voltage to the output end of the light detection circuit；
Optical transmission circuit is to the light detection circuit output luminous energy；
The light detection circuit receives the luminous energy of the optical transmission circuit output, and converts backlight electricity for the luminous energy
Stream；
The power monitoring unit monitors the electric receiving end of the light detection circuit to obtain monitoring voltage, and according to described
Monitoring voltage, the reversed bias voltage and the reference voltage obtain the current value of the back facet current.
Preferably, the power monitoring unit monitors the electric receiving end of the light detection circuit to obtain monitoring voltage, and
After the step of obtaining the current value of the back facet current according to the monitoring voltage, reversed bias voltage and reference voltage, the side
Method further include:
The power monitoring unit obtains the transmitting optical power of the optical module according to the current value.
In addition, to achieve the above object, the present invention also proposes a kind of transmitting optical power monitoring device, described device includes such as
Transmitting optical power monitoring method described in the upper transmitting optical power monitoring circuit or described device application as described above.
In addition, to achieve the above object, the present invention also proposes that a kind of optical module, the optical module include hair as described above
Optical power monitoring circuit is penetrated, perhaps transmitting optical power monitoring device or optical module application are as described above as described above
Transmitting optical power monitoring method.
It include: light the present invention provides a kind of transmitting optical power monitoring circuit, method, apparatus and optical module, the circuit
Transmit circuit, light detection circuit, power monitoring unit, reference voltage circuit and anti-bias circuit；Wherein, the reference voltage electricity
Road, for applying reference voltage to the electric receiving end of the light detection circuit；The anti-bias circuit, for electric to the light detection
The output end on road applies reversed bias voltage；The optical transmission circuit is used for the light detection circuit output luminous energy；The light detection
Circuit for receiving the luminous energy of the optical transmission circuit output, and converts back facet current for the luminous energy；The power monitoring
Unit, for monitoring the electric receiving end of the light detection circuit to obtain monitoring voltage, and according to the monitoring voltage, described anti-
Bias-voltage and the reference voltage obtain the current value of the back facet current.The present invention is by being arranged circuit reduction as described above
The circuit of the prior art, component number is few, increases fabric swatch convenience, has expanded back facet current dynamic monitoring range.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the functional block diagram of present invention transmitting optical power monitoring circuit；
Fig. 2 is the circuit diagram of present invention transmitting optical power monitoring circuit；
Fig. 3 is the flow diagram of present invention transmitting optical power monitoring method first embodiment；
| Label | Title | Label | Title |
| 100 | Optical transmission circuit | LDD | Laser drive unit |
| 200 | Light detection circuit | 101 | Laser |
| 300 | Power monitoring unit | 102 | Optical module |
| 400 | Reference voltage circuit | 401 | Reference voltage unit |
| 500 | Anti-bias circuit | 501 | Charge pump |
| GND | Ground terminal | D1 | Backlight diode |
| R1~R3 | First to 3rd resistor |
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention
In explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if should
When particular pose changes, then directionality instruction also correspondingly changes correspondingly.
In addition, the description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and should not be understood as referring to
Show or imply its relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " are defined as a result,
Two " feature can explicitly or implicitly include at least one of the features.In addition, the technical solution between each embodiment can
It to be combined with each other, but must be based on can be realized by those of ordinary skill in the art, when the combination of technical solution occurs
It is conflicting or when cannot achieve should people think that the combination of this technical solution is not present, also not the present invention claims protection
Within the scope of.
The present invention proposes a kind of transmitting optical power monitoring circuit.
It is the functional block diagram of present invention transmitting optical power monitoring circuit first embodiment referring to figs. 1 to Fig. 2, Fig. 1；Fig. 2
For the electrical block diagram of present invention transmitting optical power monitoring device first embodiment；
The circuit includes: optical transmission circuit 100, light detection circuit 200, power monitoring unit 300, reference voltage circuit
400 and anti-bias circuit 500；The coupling of the optical receiving end of the output end of the optical transmission circuit 100 and the light detection circuit 200,
The output end of the light detection circuit 200 is connected with the input terminal of the anti-bias circuit 500, the electricity of the light detection circuit 200
Receiving end is connected with the monitoring side of the output end of the reference voltage circuit and the power monitoring unit.
The optical transmission circuit 100 is used for 200 light energy output of light detection circuit.
The optical transmission circuit 100 include laser drive unit LDD (Laser Diode Driver), laser 101 and
Optical module 102；The control terminal of the laser drive unit LDD is connected with the controlled end of the laser 101, the laser
101 output end is connected with the input terminal of the optical module 102, the output end and the light detection of the optical module 102
Circuit 200 couples.
It should be noted that in the optical transmission circuit laser 101 type, not to this limitation in the present embodiment.In
In the present embodiment, the optical module 102 is optical filter, and the optical filter is 9:1, can give 10% laser reflection to the light
Observation circuit 200.
The light detection circuit 200, the luminous energy exported for receiving the optical transmission circuit 100, and the luminous energy is turned
Turn to back facet current；
The light detection circuit includes backlight diode D1 and second resistance R2；The optical receiving end of the backlight diode D1
It is coupled with the output end of the optical transmission circuit 100, the minus earth of the backlight diode D1, the backlight diode D1's
Anode is connected with the input terminal of the anti-bias circuit 500；The first end of the second resistance R2 and the backlight diode D1's
Anode connection, the second end of the second resistance R2 and the output end of the reference voltage circuit 400 and the power monitoring list
The monitoring side connection of member 300.
It should be noted that in the present invention, backlight diode D1 minus earth is needed two pole of backlight through external resistance
The photoelectric current of pipe D1 is converted to positive voltage and is monitored.To make the backlight diode D1 have back bias voltage work, need in sun
An extremely upper plus negative voltage, therefore the anti-bias circuit 500 is connected in the anode of the backlight diode D1.
The anti-bias circuit 500, for applying reversed bias voltage to the output end of the light detection circuit 200.
The anti-bias circuit 500 includes charge pump 501 and first resistor R1；The first end of the first resistor R1 and described
The connection of the first end of the anode of backlight diode D1 and the second resistance R2, the second end of the first resistor R1 and the electricity
The output end connection of lotus pump 501.
It should be noted that reversed bias voltage described in the present embodiment is -3.3V, the charge pump 501 generates negative pressure, makes institute
It is reverse-biased to state backlight diode D1 progress.The output end of the light detection circuit 200 connects the anti-bias circuit 400, back facet current
Flow to the anti-bias circuit 400.
The reference voltage circuit 400, for applying reference voltage to the electric receiving end of the light detection circuit 200.
The reference voltage circuit 400 includes reference voltage unit 401 and 3rd resistor R3；The of the 3rd resistor R3
One end is connected with the output end of the reference voltage unit 401, the second end of the 3rd resistor R3 and the second resistance R2
Second end connection, the second end of the 3rd resistor R3 also connects with the monitoring side of the power monitoring unit 300.
It should be noted that the reference voltage unit 401 is for issuing reference voltage VREF, the reference voltage unit
401 can be a part of CPU, be connected in circuit by port, and Xiang Suoshu light detection circuit 200 applies preset with reference to electricity
Press VREF.The numerical value being specifically arranged can be configured according to the actual situation, and the application limits not to this.The reference voltage
The reference voltage that voltage 401 exports remains unchanged in monitoring process, and electric current flows into the light detection through the 3rd resistor R3
Circuit 200.
The power monitoring unit 300, for monitoring the electric receiving end of the light detection circuit 200 to obtain monitoring voltage
VADC, and according to the monitoring voltage VADC, the reversed bias voltage and the reference voltage VREFObtain the electric current of the back facet current
Value.
It should be noted that the anode due to the backlight diode D1 connects negative voltage, so cannot directly monitor, need
It is realized by way of current distributing；Wherein, the output circuit of the backlight diode D1 is active current end, and outer circuits
Generation electric current be passive current terminal, passive current terminal is influenced by active current end, by the way that outer circuits are rationally arranged
Resistance value, the variation at the active current end of the response of large dynamic range may be implemented.
It should be noted that for the resistance in the transmitting optical power monitoring circuit, it can be according to each electrical modulation light
The range of the back facet current exported when component operation, and the resistance value of the resistance is set, to meet work requirements, the present invention is not right
This is limited.
It should be noted that the port of the power monitoring unit is the port ADC inside laser driving chip, or
The port ADC on CPU, the power monitoring unit can be the laser driving chip or a part of CPU, for obtaining
The monitoring voltage VADC, and pass through the monitoring voltage VADCGet the value of back facet current.It can be reflected by back facet current
The transmitting optical power of laser out is general to monitor back facet current to monitor the transmitting optical power of laser.
The present embodiment passes through setting optical transmission circuit 100, light detection circuit 200, power monitoring unit 300, reference voltage
Circuit 400 and anti-bias circuit 500；Wherein, the reference voltage circuit 400, for being received to the electricity of the light detection circuit 200
End applies reference voltage VREF；The anti-bias circuit 500, for applying reverse-biased electricity to the output end of the light detection circuit 200
Pressure；The optical transmission circuit 100 is used for 200 light energy output of light detection circuit；The light detection circuit 200, for connecing
The luminous energy that the optical transmission circuit 100 exports is received, and converts back facet current for the luminous energy；The power monitoring unit 300,
For monitoring the electric receiving end of the light detection circuit 200 to obtain monitoring voltage VADC, and according to the monitoring voltage VADC, institute
State reversed bias voltage and the reference voltage VREFObtain the current value of the back facet current.The present invention is as described above by setting
The existing optical power monitoring circuit of circuit reduction, component number is few, and fabric swatch is convenient, has expanded back facet current dynamic monitoring model
It encloses.
The present invention also proposes a kind of transmitting optical power monitoring method, is present invention transmitting optical power monitoring referring to Fig. 3, Fig. 3
The flow diagram of method first embodiment.
Based on above-mentioned transmitting optical power monitoring circuit, in transmitting optical power monitoring method first embodiment, the transmitting
Optical power monitoring method the following steps are included:
Step S10, reference voltage circuit 400 apply reference voltage V to the electric receiving end of light detection circuit 200REF。
It should be noted that the reference voltage unit 401 is for issuing reference voltage VREF, the reference voltage unit
401 can be a part of CPU, be connected in circuit by port, and Xiang Suoshu light detection circuit 200 applies preset with reference to electricity
Press VREF.The numerical value being specifically arranged can be configured according to the actual situation, and the application limits not to this.The reference voltage
The reference voltage that unit 401 exports remains unchanged in monitoring process, and electric current flows into the light detection through the 3rd resistor R3
Circuit 200.
Step S11, anti-bias circuit 500 apply reversed bias voltage to the output end of the light detection circuit 200.
It should be noted that reversed bias voltage described in the present embodiment is -3.3V, the charge pump 501 generates negative pressure, makes institute
It is reverse-biased to state backlight diode D1 progress.The output end of the light detection circuit 200 connects the anti-bias circuit 400, back facet current
Flow to the anti-bias circuit 400.
Step S12, optical transmission circuit 100 is to 200 light energy output of light detection circuit.
It should be noted that in the optical transmission circuit laser 101 type, not to this limitation in the present embodiment.In
In the present embodiment, the optical module 102 is optical filter, and the optical filter is 9:1, can give 10% laser reflection to the light
Observation circuit 200.
Step S20, the light detection circuit 200 receive the luminous energy that the optical transmission circuit 100 exports, and by the luminous energy
It is converted into back facet current.
Step S30, the power monitoring unit 300 monitor the electric receiving end of the light detection circuit 200 to obtain monitoring
Voltage VADC, and according to the monitoring voltage VADC, the reversed bias voltage and the reference voltage VREFObtain the back facet current
Current value.
It should be noted that the anode due to the backlight diode D1 connects negative voltage, so cannot directly monitor, need
It is realized by way of current distributing；Wherein, the output circuit of the backlight diode D1 is active current end, and outer circuits
Generation electric current be passive current terminal, passive current terminal is influenced by active current end, by the way that outer circuits are rationally arranged
Resistance value, the variation at the active current end of the response of large dynamic range may be implemented.Back facet current and monitoring electricity
Press VADCIt is in a linear relationship.
Step S31, the power monitoring unit obtain the transmitting optical power of the optical module according to the current value.
It should be noted that the port of the power monitoring unit is the port ADC inside laser driving chip, or
The port ADC on CPU, the power monitoring unit can be the laser driving chip or a part of CPU, for obtaining
The monitoring voltage VADC, and pass through the monitoring voltage VADCGet the value of back facet current.It can be reflected by back facet current
The transmitting optical power of laser out is general to monitor back facet current to monitor the transmitting optical power of laser.
It can be readily appreciated that also needing the ratio according to 102 reflected light of optical module after getting the value of back facet current
Example obtains the occurrence of transmitting optical power, and the back facet current is only that the optical module 102 reflexes to the light detection circuit
The electric current that 200 luminous energy generates.
The present embodiment receives the luminous energy that the optical transmission circuit 100 exports by the light detection circuit 200, and will be described
Luminous energy is converted into back facet current；The power monitoring unit 300 monitors the electric receiving end of the light detection circuit 200 to obtain prison
Survey voltage VADC, and according to the monitoring voltage VADC, the reversed bias voltage and the reference voltage VREFObtain the back facet current
Current value.Transmitting optical power can be got according to the circuit values.This embodiment simplifies existing transmitting optical power monitorings
Method, step monitoring, device requirement is low, and back facet current dynamic monitoring range is big.
The present invention also proposes a kind of transmitting optical power monitoring device, since the present apparatus uses the complete of above-mentioned all embodiments
Portion's technical solution, therefore at least all beneficial effects brought by the technical solution with above-described embodiment, herein no longer one by one
It repeats.
The present invention also proposes a kind of optical module, since this optical module uses whole technical sides of above-mentioned all embodiments
Case, therefore at least all beneficial effects brought by the technical solution with above-described embodiment, this is no longer going to repeat them.
It should be understood that having the above is only for example, not constituting any restriction to technical solution of the present invention
In body application, those skilled in the art, which can according to need, to be configured, and the present invention is without limitation.
It should be noted that workflow described above is only schematical, not to protection model of the invention
Enclose composition limit, in practical applications, those skilled in the art can select according to the actual needs part therein or
It all achieves the purpose of the solution of this embodiment, herein with no restrictions.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (9)
1. a kind of transmitting optical power monitoring circuit, which is characterized in that the circuit includes: optical transmission circuit, light detection circuit, function
Rate monitoring unit, reference voltage circuit and anti-bias circuit；The light of the output end of the optical transmission circuit and the light detection circuit
Receiving end coupling, the output end of the light detection circuit are connected with the input terminal of the anti-bias circuit, the light detection circuit
Electric receiving end is connected with the monitoring side of the output end of the reference voltage circuit and the power monitoring unit, wherein
The reference voltage circuit, for applying reference voltage to the electric receiving end of the light detection circuit；
The anti-bias circuit, for applying reversed bias voltage to the output end of the light detection circuit；
The optical transmission circuit is used for the light detection circuit output luminous energy；
The light detection circuit is converted into backlight electricity for receiving the luminous energy of the optical transmission circuit output, and by the luminous energy
Stream；
The power monitoring unit, for monitoring the electric receiving end of the light detection circuit to obtain monitoring voltage, and according to institute
It states monitoring voltage, the reversed bias voltage and the reference voltage and obtains the current value of the back facet current.
2. transmitting optical power monitoring circuit as described in claim 1, which is characterized in that the optical transmission circuit includes laser
Driving unit, laser and optical module；Wherein,
The control terminal of the laser drive unit is connected with the controlled end of the laser, the output end of the laser and institute
State the input terminal connection of optical module, the output end of the optical module and light detection circuit coupling.
3. transmitting optical power monitoring circuit as claimed in claim 2, which is characterized in that the light detection circuit includes backlight two
Pole pipe and second resistance；Wherein,
The output end coupling of the optical receiving end and the optical transmission circuit of the backlight diode, the cathode of the backlight diode
Ground connection, the anode of the backlight diode are connected with the input terminal of the anti-bias circuit；The first end of the second resistance and institute
State the anode connection of backlight diode, the output end and the function of the second end of the second resistance and the reference voltage circuit
The monitoring side of rate monitoring unit connects.
4. transmitting optical power monitoring circuit as claimed in claim 3, which is characterized in that the reference voltage circuit includes reference
Voltage cell and 3rd resistor；Wherein,
The first end of the 3rd resistor is connected with the output end of the reference voltage unit, the second end of the 3rd resistor and
The second end of the second resistance connects, and the second end of the 3rd resistor also connects with the monitoring side of the power monitoring unit
It connects.
5. as claimed in claim 4 transmitting optical power monitoring circuit, which is characterized in that the anti-bias circuit include charge pump and
First resistor；Wherein,
The first end of the first resistor is connected with the first end of the anode of the backlight diode and the second resistance, described
The second end of first resistor is connected with the output end of the charge pump.
6. a kind of transmitting optical power monitoring method, which is characterized in that the described method includes:
Reference voltage circuit applies reference voltage to the electric receiving end of light detection circuit；
Anti-bias circuit applies reversed bias voltage to the output end of the light detection circuit；
Optical transmission circuit is to the light detection circuit output luminous energy；
The light detection circuit receives the luminous energy of the optical transmission circuit output, and converts back facet current for the luminous energy；
The power monitoring unit monitors the electric receiving end of the light detection circuit to obtain monitoring voltage, and according to the monitoring
Voltage, the reversed bias voltage and the reference voltage obtain the current value of the back facet current.
7. transmitting optical power monitoring method as claimed in claim 6, which is characterized in that described in the power monitoring unit monitoring
The electric receiving end of light detection circuit is obtained with obtaining monitoring voltage according to the monitoring voltage, reversed bias voltage and reference voltage
After the step of current value of the back facet current, the method also includes:
The power monitoring unit obtains the transmitting optical power of the optical module according to the current value.
8. a kind of transmitting optical power monitoring device, which is characterized in that the transmitting optical power monitoring device includes such as claim 1
~5 described in any item transmitting optical power monitoring circuits or described device are applied as claim 6~7 is described in any item
Emit optical power monitoring method.
9. a kind of optical module, which is characterized in that the optical module includes transmitting light function as claimed in any one of claims 1 to 5
Rate observation circuit, perhaps transmitting optical power monitoring device or the optical module are applied as right is wanted as claimed in claim 8
Seek 6~7 described in any item transmitting optical power monitoring methods.
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| CN201910839965.2A CN110445537A (en) | 2019-09-05 | 2019-09-05 | Emit optical power monitoring circuit, method, apparatus and optical module |
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| CN201910839965.2A CN110445537A (en) | 2019-09-05 | 2019-09-05 | Emit optical power monitoring circuit, method, apparatus and optical module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111431611A (en) * | 2020-03-19 | 2020-07-17 | 青岛海信宽带多媒体技术有限公司 | Optical module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111431611A (en) * | 2020-03-19 | 2020-07-17 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN111431611B (en) * | 2020-03-19 | 2022-09-09 | 青岛海信宽带多媒体技术有限公司 | Optical module |
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