CN111835429A - Optical module, method for correcting transmitting optical power of optical module and controller - Google Patents
Optical module, method for correcting transmitting optical power of optical module and controller Download PDFInfo
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- CN111835429A CN111835429A CN202010772866.XA CN202010772866A CN111835429A CN 111835429 A CN111835429 A CN 111835429A CN 202010772866 A CN202010772866 A CN 202010772866A CN 111835429 A CN111835429 A CN 111835429A
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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
- H04B10/50—Transmitters
- H04B10/564—Power 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
- H04B10/07—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
Abstract
The application discloses an optical module, a method for correcting the transmitting optical power of the optical module and a controller, wherein the optical module receives the transmitting detection current of a light emitting component through a voltage regulating module, generates a plurality of voltages to be detected with different amplitudes according to the transmitting detection current, and then the controller determines the voltage to be detected which meets the range of an analog-to-digital conversion interface of the controller as the monitoring voltage among the voltages to be detected, so that when the transmitting detection current fluctuates due to different device consistencies of the light emitting component, the controller can determine a monitoring voltage which meets the range of the analog-to-digital conversion interface of the controller among the voltages to be detected, the condition that the amplitude of the monitoring voltage exceeds the range of the analog-to-digital conversion interface of the controller is avoided, and the monitoring accuracy of the transmitting optical power of the optical module is improved, the significance of monitoring and correcting the transmitted optical power is ensured.
Description
Technical Field
The present application relates to the field of optical communications technologies, and in particular, to an optical module, a method for correcting transmission optical power of the optical module, and a controller.
Background
An optical module (optical module) is composed of modules such as an optoelectronic device, a functional circuit and an optical interface, and is mainly used for converting an electrical signal into an optical signal and sending the optical signal through an optical fiber, receiving the optical signal returned by the optical fiber and converting the returned optical signal into the electrical signal, and the optical module is an important device in the field of optical communication.
In the using process of the optical module, various factors affecting the normal operation of the optical module, such as the working temperature, the bending condition of the optical fiber and the like, generally need to monitor the working condition of the optical module in real time, and the monitoring of the working condition of the optical module generally includes 5 parameter indexes for the optical module: monitoring power supply voltage, temperature, received optical power, emitted optical power and laser bias current, comparing the monitored value with a value range required under normal working conditions of the optical module, alarming if the monitored value is not within the value range, and displaying that the optical module is in a bad condition, the switch stops sending data until the optical module recovers to a normal working state again.
In the prior art, the transmitted light power of the optical module is mainly corrected by monitoring the backlight of the laser, the backlight is converted into a backlight current in the monitoring process, and the backlight current is in direct proportion to the light power of the backlight and the transmitted light power coupled into light, so that the transmitted light power can be monitored by detecting the backlight current. In an actual application process, a back current is usually converted into a back voltage, and then a controller of an optical module monitors and sends optical power according to the back voltage, but due to poor consistency of optical devices, the sizes of the back currents in different optical modules are often different, and a situation that the amplitude of the back voltage converted by the back current exceeds the receiving range of the controller may occur, which may cause inaccurate monitoring of the optical module on the sending optical power and loss of significance on the sending optical power monitoring.
Disclosure of Invention
In order to solve the above technical problems, the present application provides an optical module, a method for correcting transmission optical power of the optical module, and a controller, so as to avoid a situation that a value of a monitoring voltage received by the controller exceeds a range of an analog-to-digital conversion interface of the controller, and achieve an object of improving monitoring accuracy of the transmission optical power of the optical module.
In order to achieve the technical purpose, the embodiment of the application provides the following technical scheme:
a light module, comprising: the device comprises a light emitting component, a voltage regulating module and a controller; wherein the content of the first and second substances,
the voltage regulating module is used for receiving the sending detection current of the light emitting component and generating a plurality of voltages to be detected according to the sending detection current; the amplitudes of the voltages to be measured are different;
the controller is used for determining the voltage to be measured which meets the range of the analog-to-digital conversion interface of the controller in the plurality of voltages to be measured, performing analog-to-digital conversion on the voltage to be measured which meets the range of the analog-to-digital conversion interface of the controller to be used as monitoring voltage, and performing transmitting light power correction on the light emitting assembly according to the monitoring voltage.
Optionally, the voltage regulation module includes a plurality of first resistors;
the plurality of first resistors are numbered from 1 to N in sequence and are connected in series in sequence, a connection node of every two first resistors is used as a voltage output end, one end, not connected with other first resistors, of the first resistor numbered as 1 is used as a voltage output end, and is used as an input end of the voltage regulation module, one end, not connected with other first resistors, of the first resistor numbered as N is grounded, and N is a positive integer greater than or equal to 2;
the input end of the voltage regulating module is used for receiving the sending detection current, the sending detection current is divided by the first resistors to form a plurality of voltages to be detected, and each voltage output end is used for outputting one voltage to be detected;
the controller comprises a plurality of first input ends, and the first input ends are respectively connected with the voltage output ends in a one-to-one correspondence mode.
Optionally, the resistance values of the plurality of first resistors included in the voltage regulation module are the same.
Optionally, the controller determines, among the multiple voltages to be measured, a voltage to be measured that meets the range of the analog-to-digital conversion interface of the controller as a monitoring voltage, and specifically, compares the received multiple voltages to be measured with the upper limit value of the range of the analog-to-digital conversion interface of the controller in sequence, and uses a voltage to be measured, of which a first voltage value is smaller than the upper limit value of the range of the analog-to-digital conversion interface of the controller, as the monitoring voltage.
Optionally, the controller determines, among the multiple voltages to be measured, a voltage to be measured that meets the range of the analog-to-digital conversion interface of the controller as a monitoring voltage, and specifically, determines, among the multiple voltages to be measured, a voltage to be measured that is closest to a middle value of the range of the analog-to-digital conversion interface of the controller as the monitoring voltage.
Optionally, the controller corrects the transmission optical power of the light emitting component according to the monitoring voltage, and is configured to:
calculating the monitoring transmitting light power of the light module according to a preset voltage-light power rule;
and calculating a power difference value according to the monitored transmitting optical power and the actual optical power of the optical module detected by the optical power meter, and adjusting a voltage-optical power rule by using the calculated power difference value.
Optionally, the method further includes: the device comprises a driving module and a multi-path selection module;
the multi-path selection module comprises a control end, a feedback signal output end and a plurality of second input ends, the control end is connected with the controller, the feedback signal output end is connected with the driving module, and the plurality of second input ends are respectively connected with the plurality of voltage input ends of the voltage regulation module in a one-to-one correspondence manner;
the control end is used for receiving a second control signal, and the feedback signal output end is used for outputting sampling voltage to the driving module so that the driving module controls the light emitting component to adjust the transmitted light power according to the sampling voltage;
the controller is further configured to determine, among the plurality of voltages to be measured, a voltage to be measured that meets the range of the analog-to-digital conversion interface of the driving module as the sampling voltage, and transmit a control instruction including information of the sampling voltage to the multiplexing module;
and the multi-path selection module is used for determining the sampling voltage in the plurality of voltages to be detected after receiving the control command and transmitting the sampling voltage to the driving module.
Optionally, the controller determines, among the voltages to be measured, a voltage to be measured that meets the range of the analog-to-digital conversion interface of the driving module as the sampling voltage, and specifically, compares the received voltages to be measured with the upper limit value of the range of the analog-to-digital conversion interface of the driving module in sequence, and uses, as the sampling voltage, a voltage to be measured whose first voltage value is smaller than the upper limit value of the range of the analog-to-digital conversion interface of the driving module.
Optionally, the controller determines, among the multiple voltages to be measured, a voltage to be measured that meets the range of the analog-to-digital conversion interface of the driving module as the sampling voltage, and specifically uses, among the multiple voltages to be measured, a voltage to be measured that is closest to a middle value of the range of the analog-to-digital conversion interface of the driving module as the monitoring voltage.
A controller for controlling the light emitting assembly and the voltage regulating module in any one of the light modules to work cooperatively; the controller is configured to perform the steps of:
according to a preset rule, determining the voltage to be measured which meets the range of an analog-to-digital conversion interface of the controller in the plurality of voltages to be measured which are generated by the voltage regulating module, and performing analog-to-digital conversion on the voltage to be measured which meets the range of the analog-to-digital conversion interface of the controller to be used as a monitoring voltage;
and correcting the transmitting light power of the light emitting component according to the monitoring voltage.
Optionally, the transmitting optical power correction of the optical transmission module according to the monitoring voltage includes:
calculating the monitoring transmitting optical power of the optical module according to a preset voltage-optical power rule by using the monitoring voltage;
and calculating a power difference value according to the monitored transmitting optical power and the actual optical power of the optical module detected by the optical power meter, and adjusting a voltage-optical power rule by using the calculated power difference value.
A transmission optical power correction method of an optical module, applied to any one of the above optical modules, the method comprising:
receiving a plurality of voltages to be measured, and determining the voltages to be measured which meet the measuring range of an analog-digital conversion interface of the controller in the plurality of voltages to be measured generated by the voltage regulating module according to a preset rule; the voltage to be detected is generated by the voltage regulation module receiving the sending detection current of the light emitting component; the amplitudes of the voltages to be measured are different;
and performing analog-to-digital conversion on the voltage to be detected to generate a monitoring voltage, and performing transmitting optical power correction on the light emitting component according to the monitoring voltage.
Optionally, the correcting the transmission optical power of the optical transmission component according to the monitoring voltage includes:
calculating the monitoring transmitting optical power of the optical module according to the monitoring voltage and a preset voltage-optical power rule;
and calculating a power difference value according to the monitored transmitting optical power and the actual optical power of the optical module detected by the optical power meter, and adjusting a voltage-optical power rule by using the calculated power difference value.
It can be seen from the above technical solutions that, an embodiment of the present application provides an optical module, a method for correcting transmission optical power of the optical module, and a controller, wherein the optical module receives a transmission detection current of an optical transmission assembly through a voltage adjustment module, and generates a plurality of voltages to be detected with different amplitudes according to the transmission detection current, and then the controller determines, as a monitoring voltage, a voltage to be detected that satisfies an analog-to-digital conversion interface range of the controller among the plurality of voltages to be detected, so that when the transmission detection current fluctuates due to different device consistency of the optical transmission assembly, the controller can determine a monitoring voltage that satisfies the analog-to-digital conversion interface range of the controller among the plurality of voltages to be detected, thereby avoiding a situation that the amplitude of the monitoring voltage exceeds the analog-to-digital conversion interface range of the controller, and improving monitoring accuracy of the transmission optical power of the optical module, the significance of monitoring and correcting the transmitted optical power is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an optical module according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of an optical module according to another embodiment of the present application;
fig. 3 is a schematic structural diagram of a light module according to another embodiment of the present application;
fig. 4 is a schematic structural diagram of an optical module according to still another embodiment of the present application;
fig. 5 is a flowchart illustrating a method for correcting transmission optical power of an optical module according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
An embodiment of the present application provides an optical module, as shown in fig. 1, including: the light emitting assembly 10, the voltage adjusting module 40 and the controller 30; wherein the content of the first and second substances,
the voltage regulating module 40 is configured to receive the sending detection current of the optical transceiver module 10, and generate a plurality of voltages to be detected according to the sending detection current; the amplitudes of the voltages to be measured are different;
the controller 30 is configured to determine, among the multiple voltages to be measured, a voltage to be measured that meets the range of the analog-to-digital conversion interface of the controller 30, perform analog-to-digital conversion on the voltage to be measured that meets the range of the analog-to-digital conversion interface of the controller 30, and then use the voltage as a monitoring voltage, and perform transmission optical power correction on the light emitting assembly 10 according to the monitoring voltage.
The light emitting module 10 (transmitting optical sub-assembly, TOSA) generally includes a laser LD as a light source and a backlight detector MPD for detecting backlight of the laser LD. In the process of sending optical signals, the controller 30 controls the laser LD to send optical signals, since the resonant cavity of the laser LD has two mirror surfaces, light transmitted by the front mirror surface is sent to an optical fiber as a sent optical signal through coupling with the optical fiber for transmission, light emitted by the rear mirror surface generally becomes back light, the back light is monitored by the backlight detector MPD, and is converted into back current (i.e. the sending detection current), the size of the back current is proportional to the optical power incident on the backlight detector MPD and also proportional to the sending optical power coupled into the optical fiber, but in general, in order to ensure that the overall size of the optical module is small, the controller 30 inside the optical module does not generally have a current monitoring function, the voltage adjusting module 40 is required to convert the sending detection current into voltage, so that the controller 30 can perform analog-to-digital conversion on the converted voltage, and finally obtaining a monitoring voltage representing the transmitted optical power.
As described in the background, due to the poor uniformity of the optical devices in the optical module, there is also some difference in the amount of the back light generated by the laser LD of the light emitting assembly 10, which may result in the situation where the voltage value received by the controller 30 exceeds the range of its analog-to-digital conversion interface. To avoid this problem, the voltage regulating module 40 in this embodiment generates a plurality of voltage values to be measured proportional to the magnitude of the transmitting optical power according to the transmitting detection current, so that the controller 30 can determine, as a monitoring voltage, a voltage to be measured that meets the range of the analog-to-digital conversion interface of the controller 30 among the plurality of voltage values to be measured, and perform analog-to-digital conversion on the monitoring voltage to obtain a monitoring voltage representing the transmitting optical power of the optical transmitting assembly 10.
Optionally, in an embodiment of the present application, the controller, performing the transmission optical power correction on the optical transmitting assembly 10 according to the monitoring voltage, is configured to:
calculating the monitoring transmitting optical power of the optical module according to a preset voltage-optical power rule;
and calculating a power difference value according to the monitored transmitting optical power and the actual optical power of the optical module detected by the optical power meter, and adjusting a voltage-optical power rule by using the calculated power difference value.
Still referring to fig. 1, in one embodiment of the present application, the light module further includes: the driving module 20, and the controller 30 is further configured to control the driving module 20 to drive the light emitting assembly 10 to transmit an optical signal, and perform automatic optical power control on the driving module 20 according to the sampling voltage.
The driving module 20 typically includes an automatic power adjustment circuit APC that receives the feedback signal output from the voltage adjustment module 40 and automatically adjusts the transmitted light power of the laser LD in the light emitting module 10 according to the feedback signal.
In addition, fig. 1 also shows a limiting amplification module 60 and an optical receiving component 50 (called ROSA for short), where the limiting amplification module 60 and the optical receiving component 50 together form a receiving path of an optical module; wherein the content of the first and second substances,
the light receiving component 50 is configured to receive a return light signal and convert the return light signal into a return electrical signal;
the amplitude limiting and amplifying module 60 is configured to amplify the return electrical signal and transmit the amplified return electrical signal to the controller 30;
the controller 30 is further configured to determine the received optical power of the optical module according to the amplified return electrical signal.
On the basis of the above-mentioned embodiments, in an embodiment of the present application, as shown in fig. 2, the voltage regulation module 40 includes: a plurality of first resistors;
the plurality of first resistors are numbered from 1 to N in sequence and are connected in series in sequence, a connection node of every two first resistors is used as a voltage output end, one end, which is not connected with other first resistors, of the first resistor numbered as 1 is used as a voltage output end, and is used as an input end of the voltage regulating module 40, one end, which is not connected with other first resistors, of the first resistor numbered as N is grounded, and N is a positive integer greater than or equal to 2;
the input end of the voltage regulating module 40 is configured to receive the sending detection current, the sending detection current is divided by the first resistors to form a plurality of voltages to be detected, and each voltage output end is configured to output one voltage to be detected;
the controller 30 includes a plurality of first input terminals, and the plurality of first input terminals are respectively connected to the plurality of voltage output terminals in a one-to-one correspondence.
In fig. 2, R1, R2 … … RN both represent the first resistance.
In this embodiment, still referring to fig. 2, the N first resistors constitute N voltage output terminals, which are named as M1, M2, and M3 … … MN, respectively, and in fig. 2, assuming that the value of the transmission detection current is Ipd, and the resistance values of the first resistors numbered 1, 2, and 3 … … N are R1, R2, and R3 … … RN, respectively, the voltage value of M1 is V1 — Ipd × (R1+ R2+ R3+ … … RN);
the voltage value of M2 is V2 ═ Ipd × (R2+ R3+ … … RN);
the voltage value of M3 is V3 ═ Ipd × (R3+ … … RN);
……
the voltage value of MN is VN ═ Ipd × RN;
the voltage values of M1 to MN form a plurality of voltages to be measured, and the amplitudes of the voltages to be measured depend on the magnitude of the sending detection current and the position of the voltage output end.
Wherein V1> V2> V3 … … VN, a plurality of analog-to-digital conversion pins of the controller 30 are respectively named ADC1, ADC2 and ADC3 … … ADCN, and correspondingly, a pin ADC1 reads a V1 value, a pin ADC2 reads a V2 value, a pin ADC3 reads a V3 value, and a pin … … ADCN reads the VN value.
In order to conveniently and clearly specify the voltage value of each voltage output terminal and directly obtain the relationship between each voltage output terminal, optionally, the resistance values of the plurality of first resistors included in the voltage regulating module 40 are the same.
Thus, V1 and V2 … … VN have a certain proportional relationship, and calculation is not performed by substituting specific resistance values, for example, V2 is (N-1) × V1/N.
In an embodiment of the present application, the controller 30 compares the received voltages to be measured with an upper limit of the range of the analog-to-digital conversion interface of the controller 30 in sequence, and uses the voltage to be measured whose first voltage value is smaller than the upper limit of the range of the analog-to-digital conversion interface of the controller 30 as the monitoring voltage.
For example, if the upper limit value of the range of the analog-to-digital conversion interface of the controller 30 is Vm, the controller 30 first determines whether V1 is greater than Vm, if not, uses V1 as the monitoring voltage, if yes, determines whether V2 is greater than Vm, if not, uses V2 as the monitoring voltage, and if yes, sequentially determines V3 and V4 … … VN until the first voltage to be measured, which is less than or equal to the upper limit value of the range of the analog-to-digital conversion interface of the controller 30, is obtained. This may improve the efficiency of controller 30 in determining the monitored voltage among the plurality of voltages to be measured.
Optionally, in another embodiment of the present application, a specific feasible process of determining, by the controller 30, a voltage to be measured, which satisfies the range of the analog-to-digital conversion interface of the controller 30, as the monitoring voltage, among the multiple voltages to be measured, includes:
and taking the voltage to be measured which is closest to the middle value of the range of the analog-to-digital conversion interface of the controller 30 in the plurality of voltages to be measured as the monitoring voltage.
The intermediate value of the analog-to-digital conversion interface range is an average value of an upper limit value of the analog-to-digital conversion interface range and a lower limit value of the analog-to-digital conversion interface range, for example, if the analog-to-digital conversion interface range is 0V to 1.8V, the intermediate value of the analog-to-digital conversion interface range is (0V +1.8V)/2 ═ 0.9V.
Due to the design process of the analog-to-digital conversion interface of the controller 30, it can be found that the measurement linearity of the read value of the analog-to-digital conversion interface at the two ends of the measurement range is poor, and further the measurement error is large, so in this embodiment, taking the voltage to be measured closest to the middle value of the measurement range of the analog-to-digital conversion interface as the monitoring voltage is beneficial to improving the reading precision of the analog-to-digital conversion interface of the controller 30 for the monitoring voltage.
It should be noted that, when the two voltages to be measured are the same as the intermediate value of the range of the analog-to-digital conversion interface, one of the two voltages to be measured may be arbitrarily selected as the monitoring voltage. For example, if the middle value of the range of the analog-to-digital conversion interface is 0.9V, and two voltages to be measured are 0.8V and 1.0V, respectively, and the two voltages to be measured have the same proximity to the middle value, any one of the two voltages to be measured may be used as the monitoring voltage.
It should be noted that the first resistor may be a common resistor, may also be a Metal-Oxide-Semiconductor Field-Effect Transistor (MOS Transistor) with a short-circuited gate and source, and may also be a device with a voltage division function, such as a diode.
Referring to fig. 3, in order to reduce interference, the voltage regulation module 40 further includes a first capacitor C1, one end of the first capacitor C1 is connected to one end of the first resistor numbered 1, which is not connected to other first resistors, and the other end of the first capacitor C1 is connected to a connection node between the first resistor numbered N and the ground. The first capacitor C1 is used for filtering noise and interference in the signal.
On the basis of the above embodiment, in another embodiment of the present application, as shown in fig. 4, the optical module further includes: a multiplexing module 70;
the multi-path selection module 70 includes a control end, a feedback signal output end and a plurality of second input ends, the control end is connected to the controller 30, the feedback signal output end is connected to the APC pin of the driving module 20, and the plurality of second input ends are respectively connected to the plurality of voltage input ends of the voltage adjustment module 40 in a one-to-one correspondence manner;
the control terminal is configured to receive a second control signal, and the feedback signal output terminal is configured to output a sampling voltage to the driving module 20, so that the driving module 20 controls the light emitting module 10 to adjust the transmitted light power according to the sampling voltage;
the controller 30 is further configured to determine, among the multiple voltages to be measured, a voltage to be measured that meets the range of the analog-to-digital conversion interface of the driving module 20 as the sampling voltage, and transmit a control instruction including information of the sampling voltage to the multiplexing module 70;
the multi-path selection module 70 is configured to determine the sampling voltage among the voltages to be detected after receiving the control instruction, and transmit the sampling voltage to the driving module 20.
In this embodiment, due to the existence of the multiplexing module 70, the sampling voltage received by the driving module 20 can also be selected from a plurality of voltages to be measured, so as to avoid that the APC loop of the driving module 20 controls the range of the bias current of the light emitting device 10 to be insufficient due to the existence of the voltage adjusting module 40, thereby resulting in an insufficient output range of the light emitting device 10.
Optionally, in an embodiment of the present application, the controller 30 determines, as the sampling voltage, a voltage to be measured that meets the range of the analog-to-digital conversion interface of the driving module 20 among the voltages to be measured, and compares the received voltages to be measured with the upper limit value of the range of the analog-to-digital conversion interface of the driving module 20 in sequence, and uses, as the sampling voltage, a voltage to be measured whose first voltage value is smaller than the upper limit value of the range of the analog-to-digital conversion interface of the driving module 20.
Optionally, in another embodiment of the present application, the controller 30 determines, as the sampling voltage, a voltage to be measured that meets the range of the analog-to-digital conversion interface of the driving module 20 among the voltages to be measured, and specifically uses, as the monitoring voltage, a voltage to be measured that is closest to a middle value of the range of the analog-to-digital conversion interface of the driving module 20 among the voltages to be measured.
The following describes a method for correcting transmission optical power of an optical module according to an embodiment of the present application, and the method for correcting transmission optical power of an optical module described below may be referred to in correspondence with the optical module described above.
Accordingly, an embodiment of the present application provides a method for correcting transmission optical power of an optical module, which is applied to the optical module described in any of the above embodiments, as shown in fig. 5, and the method for correcting transmission optical power of an optical module includes:
s101: receiving a plurality of voltages to be detected, and determining the voltages to be detected which meet the measuring range of an analog-digital conversion interface of the controller as monitoring voltages in the plurality of voltages to be detected generated by the voltage regulating module according to a preset rule; the voltage to be detected is generated by the voltage regulation module receiving the sending detection current of the light emitting component and according to the sending detection current; the amplitudes of the voltages to be measured are different;
s102: the controller calculates the monitored transmitting light power according to a preset voltage-light power rule by using the monitoring voltage;
s103, detecting the actual optical power value of the optical module by using an optical power meter;
and S104, calculating by the controller according to the actual optical power value of the optical module and the monitored transmitting optical power to obtain a power difference value, and adjusting the voltage-optical power rule according to the power difference value.
Specifically, the correcting the transmission optical power of the light emitting component according to the sampling voltage comprises:
s1031: calculating the monitoring transmitting optical power y of the optical module according to the monitoring voltage and a preset voltage-optical power rule;
for convenience of description, it is assumed in this embodiment that the preset voltage-optical power rule is: and y is kx + b, wherein k and b are empirical values, and x is a sampling voltage.
S1032: monitoring the actual transmitting light power Y of the optical module by using a light power meter;
s1033: and calculating by using the actual optical power Y and the monitored transmitting optical power Y to obtain a power difference value, and adjusting a voltage-optical power rule by using the power difference value.
Specifically, calculating a power difference value by using the actual transmitting optical power Y and the monitored transmitting optical power Y, and adjusting the voltage-optical power rule by using the power difference value includes: and calculating the actual transmitting light power Y and the monitored transmitting light power Y to obtain a power difference value b 'as a correction factor, obtaining an adjusted voltage-light power rule of Y-kx + b + b', and rewriting the adjusted voltage-light power rule into the controller to realize light power calibration.
To sum up, the embodiment of the present application provides an optical module, a method for correcting transmission optical power of the optical module, and a controller, wherein the optical module receives a transmission detection current of an optical transmission assembly through a voltage adjustment module, and generates a plurality of voltages to be detected with different amplitudes according to the transmission detection current, and then the controller determines a voltage to be detected which satisfies an analog-to-digital conversion interface range of the controller among the plurality of voltages to be detected as a monitoring voltage, so that when the transmission detection current fluctuates due to different device consistencies of the optical transmission assembly, the controller can determine a monitoring voltage which satisfies the analog-to-digital conversion interface range of the controller among the plurality of voltages to be detected, thereby avoiding a situation that the amplitude of the monitoring voltage exceeds the analog-to-digital conversion interface range of the controller, and improving monitoring accuracy of the transmission optical power of the optical module, the significance of monitoring and correcting the transmitted optical power is ensured.
Features described in the embodiments in the present specification may be replaced with or combined with each other, each embodiment is described with a focus on differences from other embodiments, and the same and similar portions among the embodiments may be referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (13)
1. A light module, comprising: the device comprises a light emitting component, a voltage regulating module and a controller; wherein the content of the first and second substances,
the voltage regulating module is used for receiving the sending detection current of the light emitting component and generating a plurality of voltages to be detected according to the sending detection current; the amplitudes of the voltages to be measured are different;
the controller is used for determining the voltage to be measured which meets the range of the analog-to-digital conversion interface of the controller in the plurality of voltages to be measured, performing analog-to-digital conversion on the voltage to be measured which meets the range of the analog-to-digital conversion interface of the controller to be used as monitoring voltage, and performing transmitting light power correction on the light emitting assembly according to the monitoring voltage.
2. The light module of claim 1, wherein the voltage regulation module comprises a plurality of first resistors;
the plurality of first resistors are numbered from 1 to N in sequence and are connected in series in sequence, a connection node of every two first resistors is used as a voltage output end, one end, not connected with other first resistors, of the first resistor numbered as 1 is used as a voltage output end, and is used as an input end of the voltage regulation module, one end, not connected with other first resistors, of the first resistor numbered as N is grounded, and N is a positive integer greater than or equal to 2;
the input end of the voltage regulating module is used for receiving the sending detection current, the sending detection current is divided by the first resistors to form a plurality of voltages to be detected, and each voltage output end is used for outputting one voltage to be detected;
the controller comprises a plurality of first input ends, and the first input ends are respectively connected with the voltage output ends in a one-to-one correspondence mode.
3. The optical module according to claim 2, wherein the plurality of first resistors included in the voltage adjustment module have the same resistance.
4. The optical module according to claim 1, wherein the controller determines, as the monitoring voltage, a voltage to be measured that satisfies an analog-to-digital conversion interface range of the controller among the voltages to be measured, and specifically, compares the received voltages to be measured with an upper limit value of the analog-to-digital conversion interface range of the controller in sequence, and uses, as the monitoring voltage, a voltage to be measured whose first voltage value is smaller than the upper limit value of the analog-to-digital conversion interface range of the controller.
5. The optical module of claim 1, wherein the controller determines, as the monitoring voltage, a voltage to be measured that satisfies an analog-to-digital conversion interface range of the controller among the plurality of voltages to be measured, and is specifically configured to use, as the monitoring voltage, a voltage to be measured that is closest to a middle value of the analog-to-digital conversion interface range of the controller among the plurality of voltages to be measured.
6. The light module of claim 1, wherein the controller performs transmit light power correction on the light emitting assembly according to the monitored voltage for:
calculating the monitoring transmitting optical power of the optical module according to a preset voltage-optical power rule;
and calculating a power difference value according to the monitored transmitting optical power and the actual optical power of the optical module detected by the optical power meter, and adjusting a voltage-optical power rule by using the calculated power difference value.
7. The light module of claim 6, further comprising: the device comprises a driving module and a multi-path selection module;
the multi-path selection module comprises a control end, a feedback signal output end and a plurality of second input ends, the control end is connected with the controller, the feedback signal output end is connected with the driving module, and the plurality of second input ends are respectively connected with the plurality of voltage input ends of the voltage regulation module in a one-to-one correspondence manner;
the control end is used for receiving a second control signal, and the feedback signal output end is used for outputting sampling voltage to the driving module so that the driving module controls the light emitting component to adjust the transmitted light power according to the sampling voltage;
the controller is further configured to determine, among the plurality of voltages to be measured, a voltage to be measured that meets the range of the analog-to-digital conversion interface of the driving module as the sampling voltage, and transmit a control instruction including information of the sampling voltage to the multiplexing module;
and the multi-path selection module is used for determining the sampling voltage in the plurality of voltages to be detected after receiving the control command and transmitting the sampling voltage to the driving module.
8. The optical module according to claim 7, wherein the controller determines, as the sampling voltage, a voltage to be measured that satisfies an analog-to-digital conversion interface range of the driving module among the voltages to be measured, and specifically, compares the received voltages to be measured with an upper limit value of the analog-to-digital conversion interface range of the driving module in sequence, and uses, as the sampling voltage, a voltage to be measured whose first voltage value is smaller than the upper limit value of the analog-to-digital conversion interface range of the driving module.
9. The optical module of claim 7, wherein the controller determines, as the sampling voltage, a voltage to be measured that satisfies an analog-to-digital conversion interface range of the driving module among the plurality of voltages to be measured, and specifically, determines, as the sampling voltage, a voltage to be measured that is closest to a middle value of the analog-to-digital conversion interface range of the driving module among the plurality of voltages to be measured.
10. A controller for controlling the light emitting assembly and the voltage regulating module of the light module of any of claims 1-9 to cooperate; the controller is configured to perform the steps of:
according to a preset rule, determining the voltage to be measured which meets the range of an analog-to-digital conversion interface of the controller in the plurality of voltages to be measured which are generated by the voltage regulating module, and performing analog-to-digital conversion on the voltage to be measured which meets the range of the analog-to-digital conversion interface of the controller to be used as a monitoring voltage;
and correcting the transmitting light power of the light emitting component according to the monitoring voltage.
11. The controller of claim 10, wherein transmitting optical power correction to the optical transmit assembly based on the monitored voltage comprises:
calculating the monitoring transmitting optical power of the optical module according to a preset voltage-optical power rule by using the monitoring voltage;
and calculating a power difference value according to the monitored transmitting optical power and the actual optical power of the optical module detected by the optical power meter, and adjusting a voltage-optical power rule by using the calculated power difference value.
12. A transmission optical power correction method for an optical module, which is applied to the optical module according to any one of claims 1 to 9, the transmission optical power correction method for the optical module comprising:
receiving a plurality of voltages to be measured, and determining the voltages to be measured which meet the measuring range of an analog-digital conversion interface of the controller in the plurality of voltages to be measured generated by the voltage regulating module according to a preset rule; the voltage to be detected is generated by the voltage regulation module receiving the sending detection current of the light emitting component; the amplitudes of the voltages to be measured are different;
and performing analog-to-digital conversion on the voltage to be detected to generate a monitoring voltage, and performing transmitting optical power correction on the light emitting component according to the monitoring voltage.
13. The method of claim 12, wherein the transmitting optical power correction of the optical transmit assembly as a function of the monitored voltage comprises:
calculating the monitoring transmitting optical power of the optical module according to the monitoring voltage and a preset voltage-optical power rule;
and calculating a power difference value according to the monitored transmitting optical power and the actual optical power of the optical module detected by the optical power meter, and adjusting a voltage-optical power rule by using the calculated power difference value.
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| CN111835429B (en) | 2021-11-09 |
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