CN115021811A - Optical power reporting method and device of optical module - Google Patents
Optical power reporting method and device of optical module Download PDFInfo
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- H—ELECTRICITY
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- 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
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Abstract
The invention provides an optical power reporting method and device of an optical module, under the condition that lasers in the optical module are opened more and grouped so as to increase the intensity of optical signals, each laser is opened singly before working, the current and the optical power of the laser are recorded, when each laser is opened singly, crosstalk values of other lasers are set up, a relation curve among the crosstalk values is established, when the optical module works normally, the crosstalk values received by each laser are obtained according to the relation curve, and then optical crosstalk is eliminated accurately, so that more accurate optical power is obtained and reported.
Description
Technical Field
The present invention relates to the field of optical communications technologies, and in particular, to a method and an apparatus for reporting optical power of an optical module.
Background
An Optical module (Optical transceiver) is used as an important active Optical device, electric-Optical conversion and Optical-electric conversion of signals are respectively realized at a sending end and a receiving end, because transmission of communication signals mainly uses Optical fibers as media, and electric signals are processed by a generating end, a transmitting end, a processing end and the receiving end, the Optical module has a wide and continuously-increased market space, the upstream of the Optical module mainly comprises an Optical chip and a passive Optical device, and downstream customers mainly comprise telecom main equipment providers, operators and internet cloud computing enterprises.
The Optical module follows the packaging sequence of Chip-assembly-module, the laser Chip and the detector Chip form TOSA (Transmitter Optical Subassembly) and ROSA (Receiver Optical Subassembly) through traditional TO packaging, meanwhile, the matched electric Chip is pasted On PCB (Printed Circuit Board), and then the Optical channel and the Optical fiber are connected through precise coupling, finally, the Optical module is packaged into a complete Optical module.
In recent years, large data centers have been rapidly developed, and the interconnection rate has been rapidly increased from 100G to 400G. The demand of the optical module is increased in geometric progression, the trend is to improve the service performance and the transmission distance of the optical module, and the effective elimination of the optical crosstalk influence is very important in the situation of multiple lasers.
Therefore, on the basis of ensuring that the received power of the optical module is within the allowable range, it is necessary to improve the performance and the transmission distance of the optical module, which is a problem to be solved in the art.
Disclosure of Invention
The technical problem to be solved by the invention is that under the condition that the optical module is provided with a plurality of open lasers, the optical crosstalk cannot be accurately eliminated, so that the optical power of the optical module cannot be accurately reported.
The embodiment of the invention adopts the following technical scheme:
in a first aspect, a method for reporting optical power of an optical module, where a processor of the optical module controls a first preset number of lasers to transmit optical signals to a second optical module on an opposite node, and reports the optical power, specifically:
the processor sets one or more lasers into a group and works under the same wavelength, before working, a current analog-to-digital conversion value ADIbias and optical power P of each laser in the same group under the condition of single-opening are recorded to obtain an optical power reporting curve C of each single-opening laser, and crosstalk values ADbias suffered by each other un-opened laser in the same group are recorded, so that a relation curve D of the current Ibias of each single-opening laser and the crosstalk values ADbias suffered by each un-opened laser in the same group is obtained; when the optical power reporting curve C works, all the lasers are fully opened, each laser obtains each crosstalk value from other lasers in the same group according to the relation curve D, and the current analog-to-digital conversion value ADIbias of each laser minus each corresponding crosstalk value is input into the optical power reporting curve C to obtain the optical power without optical crosstalk and report the optical power;
the processor acquires the intensity of the optical signal of the second detector at the corresponding wavelength acquired by the second optical module on the opposite end node, so as to determine the number of lasers belonging to the same laser group and working at the same wavelength to be established in the using process.
Preferably, the recording of the current analog-to-digital conversion value ADIbias and the optical power P of each laser in the same group under the single-on condition obtains an optical power reporting curve C of each single-on laser, and specifically includes:
selecting a first calibration point and a second calibration point of the optical module, and recording a current analog-to-digital conversion value ADIbias corresponding to the first calibration point of the mth laser in any group by the processor under the condition of single-on 1m Corresponding optical power P 1m And converting the current analog-to-digital conversion value ADIbias 1m And optical power P 1m Establishing a first relational expression; the processor records the current analog-to-digital conversion value ADIbias corresponding to the second calibration point of the mth laser under the condition of single-on 2m Corresponding optical power P 2m And converting the current analog-to-digital conversion value ADIbias 2m And optical power P 2 Establishing a second relational expression; forming a first equation set by the first relational expression and the second relational expression, and obtaining the optical power reporting curve C of the mth laser according to the first equation set;
the first program group is as follows:
the optical power reporting curve C of the mth laser is:
P＝K m *ADIbias+offset m ；
wherein K is a coefficient, offset is an offset, K m Reporting coefficient of curve C for optical power of the mth laser, the offset m And reporting the offset of a curve C to the optical power of the mth laser, wherein the mth laser is the mth laser from top to bottom in any group of lasers in the optical module, and m is less than or equal to a first preset number and is greater than 0.
Preferably, the recording of the crosstalk value ADbias suffered by each of the other unopened lasers in the same group so as to obtain a relation D between the current Ibias of each single-opened laser and the crosstalk value ADbias suffered by each unopened laser in the same group specifically includes:
the current Ibias of the nth single-open laser in any group at the first calibration point 1n The crosstalk value ADbias received by the m-th unopened laser in the same group 1nm Establishing a third relational expression; the current Ibias of the nth single-open laser at the second calibration point 2n The value of crosstalk ADbias experienced by the m-th unopened laser in the same group 2nm Establishing a fourth relational expression, establishing a second equation set by using the third relational expression and the fourth relational expression to obtain a relational curve D of the current Ibias of the nth single-open laser in the same group and a crosstalk value ADbias applied to the mth unopened laser, wherein the relational curve D corresponds to the mth unopened laser;
the second system of equations is:
the relation curve D of the current of the nth single-open laser and the current applied to the mth unopened laser is as follows:
Ibias＝K nm *ADbias+offset nm ；
wherein, K is nm For the nth single-open laser in the same groupCoefficient of the curve D of the current Ibias of the laser and the crosstalk value ADbias applied to the m-th unopened laser, said offset nm The offset of a relation curve D between the current Ibias of the nth single-opening laser in the same group and the crosstalk value ADbias applied to the mth un-opening laser is obtained, the nth laser is the nth laser from top to bottom in any group of lasers in the optical module, n is smaller than or equal to a first preset number and larger than 0, and n is not equal to m.
Preferably, when all the lasers are fully on, each laser obtains each crosstalk value from other lasers in the same group according to the relationship curve D, which specifically includes:
when all lasers in the same group are fully opened to normally work, substituting the current value Ibias of the optical module in normal work into all the relation curves D corresponding to the mth unopened lasers to obtain all crosstalk values of the mth unopened lasers corresponding to the relation curves D when other lasers are singly opened, adding all crosstalk values of the mth unopened lasers corresponding to the relation curves D to obtain the total crosstalk value ADbias of the mth unopened lasers corresponding to the relation curves D m 。
Preferably, the step of subtracting the corresponding crosstalk value from the current analog-to-digital conversion value ADIbias of each laser into the optical power reporting curve C to obtain the optical power without optical crosstalk and report the optical power includes:
when all lasers in the same group are fully opened to work normally, subtracting the total crosstalk value ADbias suffered by the mth unopened laser from the current analog-to-digital conversion value ADIbias of the mth unopened laser m Substituting the optical power into the optical power reporting curve C of the mth laser to obtain the corrected optical power P of the mth laser m ；
The optical power of the mth laser is substituted into the optical power reporting curve C:
P＝K m *(ADIbias-ADbias m )+offset m 。
preferably, after the optical module determines the laser groups and the master-slave relationship of the number of lasers in each group, the method further comprises the following steps;
the processor sends configuration content containing the laser groups and the laser master-slave relation in each laser group to a second optical module on an opposite end node;
after the second optical module on the opposite end node acquires the configuration content through the second detector, the wavelength of an optical signal emitted by each laser in a corresponding group of laser groups is based on the emission wavelength of the main laser in the group; then, among the corresponding first preset number of second detectors on the second optical module on the opposite end node, the second detectors on the optical path matched with the optical signal wavelength of the main laser in each laser group enter a working state, and the remaining second detectors are in a standby state or a silent state.
Preferably, each laser has a default optical signal wavelength of initial operation in an initial state of the first preset number of lasers, that is, before the configuration process is completed;
when the number of the lasers contained in the laser group is determined to be one through the configuration process, the processor sends respective independent data contents to be sent to the laser drivers of the first preset number corresponding to the lasers of the first preset number, and sends optical signals carrying the corresponding data contents to be sent modulated by the respective laser drivers in parallel through the lasers of the first preset number.
Preferably, the processor obtains the optical signal intensity of the second detector at the corresponding wavelength acquired by the second optical module on the peer node, so as to determine the number of lasers belonging to the same laser group and working at the same wavelength, which is to be established in the use process, specifically:
after acquiring one or more parameters of the length of an optical fiber link, the number of repeaters and the number of optical fiber fusion points between the optical fiber link and a second optical module on an opposite end node, the processor correspondingly selects a matched number of lasers in a first round of test according to historical experience, sets the lasers to be transmitted at the same optical signal wavelength, and gives the same electrical signal test data content to respective laser drivers so as to drive the corresponding lasers to synchronously send optical signals.
Preferably, the laser devices are grouped in a manner of being grouped in a top-to-bottom order; and the main laser in each corresponding laser group is the laser with the smallest number in the group; or, according to the preset stepping length, selecting the number of the corresponding laser to meet the requirement of the laser group formed by the matched number of lasers under the corresponding preset stepping length span; and the master laser in each respective laser group is the laser numbered centrally within the respective group.
In a second aspect, an optical power reporting apparatus for an optical module includes at least one processor, and a memory communicatively connected to the at least one processor; the memory stores instructions executable by the at least one processor, and the instructions are executed by the processor and used for executing the optical power reporting method of the optical module.
The invention provides an optical power reporting method and device of an optical module, under the condition that lasers in the optical module are opened more and grouped so as to increase the intensity of optical signals, each laser is opened singly before working, the current and the optical power of the laser are recorded, when each laser is opened singly, crosstalk values of other lasers are set up, a relation curve among the crosstalk values is established, when the optical module works normally, the crosstalk values received by each laser are obtained according to the relation curve, and then optical crosstalk is eliminated accurately, so that more accurate optical power is obtained and reported.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a flowchart of a method for reporting optical power of an optical module according to an embodiment of the present invention;
fig. 2 is a simple schematic diagram of an optical module in the optical power reporting method for the optical module according to the embodiment of the present invention;
fig. 3 is a flowchart of a method for reporting optical power of an optical module according to an embodiment of the present invention;
fig. 4 is a flowchart of a method for reporting optical power of an optical module according to an embodiment of the present invention;
fig. 5 is a schematic device diagram of an optical power reporting apparatus of an optical module according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, the terms "inner", "outer", "longitudinal", "lateral", "upper", "lower", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are for convenience only to describe the present invention without requiring the present invention to be necessarily constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1:
an embodiment 1 of the present invention provides an optical power reporting method for an optical module, where a processor of the optical module controls a first preset number of lasers to transmit optical signals to a second optical module on an opposite node, and reports optical power.
As shown in fig. 1, specifically:
in step 101, the processor sets one or more lasers as a group and operates at the same wavelength.
The processor sends an electric signal to laser drivers needing to work in a first preset number of laser drivers, the laser drivers receiving the electric signal drive corresponding lasers to be started, one or more lasers are taken as a group in all the started lasers, the laser drivers corresponding to the same group of lasers receive the same electric signal from the processor and further drive the same group of lasers to send optical signals with the same wavelength, the number of each group of lasers is the same, and the number is determined by the processor obtaining the optical signal intensity of a second detector under the corresponding wavelength collected by an optical module on a second optical module on an opposite end node.
In step 102, before working, a current analog-to-digital conversion value ADIbias and an optical power P of each laser in the same group under the single-open condition are recorded, and an optical power reporting curve C of each single-open laser is obtained.
After the processor groups all the lasers, before formal work, the crosstalk which each laser can receive needs to be measured, when any one laser in any one group is singly opened and detected, all other lasers in the optical module are in an off state, when any one laser is singly opened, all parameters are recorded, wherein Ibias is a current value when the module finishes adjusting and meeting the protocol requirement characteristics, the light power of the singly opened laser is recorded as P, and the current analog-to-digital conversion value is recorded as ADIbias.
In step 103, the crosstalk value ADbias received by each of the other unopened lasers in the same group is recorded, so as to obtain a relationship curve D between the current Ibias of each single-opened laser and the crosstalk value ADbias received by each unopened laser in the same group.
The lasers in the same group only need to consider crosstalk from other lasers in the same group, so that only the crosstalk from the single-open laser of other lasers in the same group is recorded each time, and a relation curve D is established between the crosstalk and the current Ibias of the single-open laser.
In step 104, when the laser driver works, all the lasers are fully turned on, and each laser obtains each crosstalk value from other lasers in the same group according to the relation curve D.
When the optical module normally works, all the lasers are fully opened, the current Ibias of the optical module in normal work is substituted into each relation curve D obtained in the step 103, so that crosstalk values of the same laser from other lasers in the same group can be obtained, and the crosstalk values of the same laser are added, namely, the total crosstalk value of the laser in normal work is obtained.
In step 105, the current analog-to-digital conversion value ADIbias of each laser minus each corresponding crosstalk value is entered into the optical power reporting curve C, and the optical power without optical crosstalk is obtained and reported.
And subtracting the total crosstalk value correspondingly received by the laser from the current Ibias when the optical module normally works, namely, independently removing the crosstalk brought by all other lasers in the same group one by the laser, so that the current value Ibias at the moment is most accurate and is substituted into the optical power reporting curve C corresponding to the laser in the step 102 to obtain relatively accurate optical power and report the optical power.
The processor acquires the intensity of the optical signal of the second detector at the corresponding wavelength acquired by the second optical module on the opposite end node, so as to determine the number of lasers belonging to the same laser group and working at the same wavelength to be established in the using process.
As shown in fig. 2, the optical module includes a first preset number of laser drivers, a first preset number of lasers, a multiplexer, a demultiplexer, and a first preset number of first detectors, and the laser drivers and the lasers are electrically connected; each laser and the wave combiner complete optical path coupling; the wave separator and the first detector complete optical path coupling, the optical module is divided into a sending end and a receiving end, a wave combiner on the sending end of the first optical module at one end is connected with a wave separator on the receiving end of the second optical module on the opposite-end node through optical fibers, and the wave separator on the receiving end of the first optical module is connected with a wave combiner on the sending end of the second optical module on the opposite-end node through optical fibers.
One or more lasers are used as a group in all started lasers, laser drivers corresponding to the same group of lasers receive the same electrical signal from a processor and further drive the same group of lasers to send optical signals with the same wavelength, the number of the lasers in each group is the same, and the number is determined by the processor acquiring the intensity of the optical signal of a second detector at the corresponding wavelength, which is acquired by an optical module on a second optical module on an opposite end node.
Grouping all lasers in the optical module, sending optical signals with the same wavelength by the same group of lasers, and receiving the optical signals with the same type of wavelength by the opposite-end optical module only once under the action of a combiner and a wave splitter when the optical signals are sent to the opposite-end optical module, so that the intensity of the optical signals sent by the optical module and the transmission distance of the optical module are improved; on the basis, when actual optical power is reported, crosstalk brought by lasers in the same group of lasers needs to be accurately eliminated, when each laser is singly opened for calibration recording, current and voltage parameters of each singly opened laser are recorded, crosstalk values of other lasers are recorded at the same time, a relation curve is established between the corresponding current and the crosstalk values of each laser, when a normally working laser is fully opened, all crosstalk values of each laser from other lasers are obtained according to current values, and optical power calculation is carried out after the crosstalk values are removed.
The recording of the current analog-to-digital conversion value ADIbias and the optical power P of each laser in the same group under the single-on condition obtains an optical power reporting curve C of each single-on laser, and specifically includes:
selecting a first calibration point and a second calibration point of the optical module, and recording a current analog-to-digital conversion value ADIbias corresponding to the first calibration point of the mth laser in any group by the processor under the condition of single-on 1m Corresponding optical power P 1m And converting the current analog-to-digital conversion value ADIbias 1m And optical power P 1m Establishing a first relational expression; the processor records the current analog-to-digital conversion value ADIbias corresponding to the second calibration point of the mth laser under the condition of single-on 2m Corresponding optical power P 2m And will beThe current analog-to-digital conversion value ADIbias 2m And optical power P 2 Establishing a second relational expression; forming a first equation set by the first relational expression and the second relational expression, and obtaining the optical power reporting curve C of the mth laser according to the first equation set;
the first program group is as follows:
the optical power reporting curve C of the mth laser is:
P＝K m *ADIbias+offset m ；
wherein K is a coefficient, offset is an offset, K m Reporting coefficient of curve C for optical power of the mth laser, the offset m And reporting the offset of a curve C to the optical power of the mth laser, wherein the mth laser is the mth laser from top to bottom in any group of lasers in the optical module, and m is less than or equal to a first preset number and is greater than 0.
The mth laser represents any one of any group of lasers in the optical module, and all the lasers in the optical module are applicable; the laser single-open mode means that the optical module only opens one laser, all the other lasers are closed, and all parameters of the single-open laser are recorded; when the first calibration point and the second calibration point are selected, because the threshold value of the optical device is increased and the skew efficiency is reduced in the long-term use process according to the characteristics of the laser, the possibility of the transmission optical power being increased rarely occurs in the normal application process, and the transmission optical power is generally reduced step by step, so that in order to ensure that the optical power report of the optical device is accurate in the long-term operation, the selection of the first calibration point and the second calibration point is performed by referring to the current value which is actually adjusted, the selection of technicians in the field is performed according to the actual situation, and all the calibration point selections which meet the actual situation requirements are all within the protection range of the patent; and an equation set is established through the two selected calibration point records to obtain an optical power reporting curve C under the condition that the single-open laser is free from crosstalk.
When the laser is singly opened, the crosstalk of the single-opened laser to other lasers in the same group needs to be recorded, and a relational expression between the crosstalk and the current on each unopened laser needs to be established.
Recording the crosstalk value ADbias suffered by each other unopened laser in the same group, thereby obtaining a relation curve D between the current Ibias of each single-opened laser and the crosstalk value ADbias suffered by each unopened laser in the same group, which specifically comprises the following steps:
the current Ibias of the nth single-open laser in any group at the first calibration point 1n The crosstalk value ADbias received by the m-th unopened laser in the same group 1nm Establishing a third relational expression; the current Ibias of the nth single-open laser at the second calibration point 2n The value of crosstalk ADbias experienced by the m-th unopened laser in the same group 2nm Establishing a fourth relational expression, establishing a second equation set by using the third relational expression and the fourth relational expression to obtain a relational curve D of the current Ibias of the nth single-open laser in the same group and a crosstalk value ADbias applied to the mth unopened laser, wherein the relational curve D corresponds to the mth unopened laser;
the second equation set is:
the relation curve D of the current of the nth single-open laser and the current applied to the mth unopened laser is as follows:
Ibias＝K nm *ADbias+offset nm ；
wherein, K is nm The offset is a coefficient of a curve D of the current Ibias of the nth single-opening laser in the same group and the crosstalk value ADbias applied to the mth single-opening laser nm The current Ibias of the nth single-open laser in the same group is related to the crosstalk value ADbias applied to the mth single-open laserAnd D, the nth laser is the nth laser from top to bottom in any group of lasers in the optical module, n is less than or equal to a first preset number and is greater than 0, and n is not equal to m.
The nth laser represents any one laser except the mth laser in any group of lasers in the optical module, and all the lasers in the optical module are applicable; and recording crosstalk values which are correspondingly received by current values of all unopened lasers in the same group of the single-opening lasers at the first calibration point and the second calibration point, performing single-opening recording on each laser, and establishing a relation curve D between the current value and the crosstalk value of each unopened laser, wherein the relation curve D of the quantity of other lasers in the group where one laser is located is used for representing crosstalk brought to the laser by other lasers in the same group.
In actual operation, the lasers of the optical module are fully opened, and at the moment, all crosstalk values of one laser from other lasers in the same group can be calculated according to the relation curve D.
When all the lasers are fully opened, each laser obtains each crosstalk value from other lasers in the same group according to the relation curve D, and the method specifically includes:
when all lasers in the same group are fully opened to normally work, substituting the current value Ibias of the optical module in normal work into all relation curves D corresponding to the mth unopened laser to obtain all crosstalk values of the mth unopened laser corresponding to the relation curves D when other lasers are singly opened, adding all crosstalk values of the mth unopened laser corresponding to the relation curves D to obtain a total crosstalk value ADbias of the mth unopened laser corresponding to the relation curves D m 。
When the laser works normally, the currents of the same group of lasers are the same, the current values during working are substituted into all relation curves D of the lasers one by one, the crosstalk values of the lasers from other lasers which can be received by the lasers are correspondingly calculated one by one, all the crosstalk values are added, namely the total crosstalk value of the lasers which can be received by the lasers during normal working, and when the mth laser is in the group, the total number of h lasers is hThen, the total crosstalk value ADbias m The process is as follows:
ADbias m ＝ADbias 1m +ADbias 2m +…+ADbias (m-1)m +ADbias (m+1)m +…+ADbias (h-1)m +ADbias hm
the ADbias 1m The ADbias is the crosstalk value brought to the mth laser when the 1 st laser in the same group is singly switched on 2m The ADbias is the crosstalk value brought to the m laser when the 2 nd laser in the same group is singly switched on (m-1)m The ADbias is the crosstalk value brought to the m laser when the m-1 laser in the same group is singly switched on (m+1)m The ADbias is a crosstalk value brought to the m +1 th laser in the same group when the m +1 th laser is singly switched on (h-1)m The ADbias is a crosstalk value brought to the mth laser when the h-1 th laser in the same group is singly switched on hm For the crosstalk value brought to the mth laser when the h laser in the same group is singly opened, the ellipses in the middle of the formula sequentially increase the crosstalk value applied to the mth laser for the serial number of each singly opened laser.
And subtracting the total crosstalk value from the current value, and substituting the subtracted value into the optical power reporting curve C of the corresponding laser to obtain the power of the corresponding laser.
The step of subtracting the corresponding crosstalk value from the current analog-to-digital conversion value ADIbias of each laser device is input into the optical power reporting curve C to obtain the optical power without optical crosstalk and report the optical power, which specifically includes:
when all lasers in the same group are fully opened to work normally, subtracting the total crosstalk value ADbias suffered by the mth unopened laser from the current analog-to-digital conversion value ADIbias of the mth unopened laser m Substituting the optical power into the optical power reporting curve C of the mth laser to obtain the corrected optical power P of the mth laser m ；
The optical power of the mth laser is substituted into the optical power reporting curve C:
P＝K m *(ADIbias-ADbias m )+offset m 。
the total crosstalk value of each laser in the optical module is subtracted by the current in normal operation, that is, the current value of each laser after crosstalk is eliminated, which can be regarded as the current value of each laser under the single-open condition, and the current value is substituted into the laser optical power reporting curve C to obtain the optical power after the crosstalk value is eliminated.
After the lasers are grouped, the wavelengths of the optical signals transmitted by the lasers in the same group are all determined by the master laser in the lasers in the same group, so that one master laser exists in each group of lasers for determining the wavelength of the transmitted optical signals, the other lasers are slave lasers, and the wavelengths of the optical signals transmitted by the slave lasers are consistent with that of the master laser.
In order to increase the transmission distance of the optical module and the intensity of the optical signal, it is necessary to group the lasers in the optical module.
As shown in fig. 3, the steps are as follows:
in step 201, the optical signal intensity of the second detector at the corresponding wavelength, which is collected by the second optical module on the correspondent node, is obtained.
The second optical module is arranged on an opposite end node of the first optical module, is connected through an optical fiber, and receives, analyzes and feeds back optical signals, and the corresponding wavelength is the wavelength of the optical signals emitted by the main tunable lasers in the group after grouping.
In step 202, the number of tunable lasers belonging to the same group of tunable lasers that are to be established during use and operate at the same wavelength and whose corresponding laser drivers acquire the same transmitted data content is determined.
The laser drivers corresponding to the same group of adjustable lasers receive the same electrical signal from the processor and further drive the same group of adjustable lasers to send optical signals with the same wavelength, the number of each group of adjustable lasers is the same, and the number is determined by the processor acquiring the optical signal intensity of the second detector under the corresponding wavelength, acquired by the optical module on the second optical module on the opposite end node.
On the basis of using more lasers, the optical signals with different wavelengths need to be analyzed and received, and in order to further increase the amplitude of the optical signals, all the lasers need to be grouped, and the wavelength of the optical signals output by the lasers in each group is ensured to be consistent.
After the optical module determines laser groups and the master-slave relationship of the number of lasers in each group, the method also comprises the following steps;
the processor sends configuration content containing the laser groups and the laser master-slave relation in each laser group to a second optical module on an opposite end node;
after the second optical module on the opposite end node acquires the configuration content through the second detector, the wavelength of an optical signal emitted by each laser in a corresponding group of laser groups is based on the emission wavelength of the main laser in the group; then, among the corresponding first preset number of second detectors on the second optical module on the opposite end node, the second detectors on the optical path matched with the optical signal wavelength of the main laser in each laser group enter a working state, and the remaining second detectors are in a standby state or a silent state.
The second detector for receiving the detection signal in the configuration process may be set as a second detector with the number 1 in the second optical module and located in the first preset number of second detectors by default.
The number of the lasers in each group is greater than or equal to 1, wherein when the number of the lasers in the same group is greater than 1, the lasers in the same group include a master-slave relationship, wherein the number of the master lasers in each group is 1, the remaining lasers in the same group are slave lasers, the slave lasers use optical signals emitted by the master lasers as a reference, the wavelengths of the optical signals emitted by the slave lasers are all consistent with the wavelength emitted by the master laser, only the second detector on the second optical module on the opposite end node corresponding to the master laser is turned on, and the remaining second detectors are in a standby state or a silent state and used for receiving the optical signals emitted by the master laser, so that the second detector on the second optical module on the opposite end node only correspondingly receives one optical signal with each different wavelength.
The detector is in a standby state capable of providing weak driving signals, namely, the detector is in a state with more corresponding detection sensitivities and is used for saving power consumption; the silent state of the detector is that no corresponding driving signal is provided, namely no static working voltage is input, and the corresponding detector is in a state without special power supply.
The detectors can be PIN or APD, or other detectors capable of achieving the same effect are within the protection scope of the patent,
when the first preset number of lasers are in an initial state, namely before the configuration process is completed, each laser has a default optical signal wavelength of initial work;
when the number of the lasers contained in the laser group is determined to be one through the configuration process, the processor sends respective independent data contents to be sent to the laser drivers of the first preset number corresponding to the lasers of the first preset number, and sends optical signals carrying the corresponding data contents to be sent modulated by the respective laser drivers in parallel through the lasers of the first preset number.
When one laser is used as a group, a master laser and a slave laser do not need to be selected, the lasers with the first preset number are all master lasers, the master lasers all send optical signals with different wavelengths, and the optical signals are sent to corresponding second detectors after being subjected to wave splitting by a wave splitter of a second optical module of the opposite end node.
The processor is configured to set a mode in which one or more lasers operate at the same wavelength in a configuration process, and acquire optical signal intensity of a second detector at a corresponding wavelength, acquired by a second optical module on an opposite end node, specifically:
after acquiring one or more parameters of the length of an optical fiber link, the number of repeaters and the number of optical fiber fusion points between the optical fiber link and a second optical module on an opposite end node, the processor correspondingly selects a matched number of lasers in a first round of test according to historical experience, sets the lasers to be transmitted at the same optical signal wavelength, and gives the same electrical signal test data content to respective laser drivers so as to drive the corresponding lasers to synchronously send optical signals.
When grouping the first preset number of laser drivers, the processor is required to obtain various parameters including the length of an optical fiber link, the number of repeaters and the number of optical fiber fusion points of the second optical module on the end node for reference, so as to determine the number of each group of laser drivers, and further determine the number of the lasers which are turned on, wherein the number of the laser drivers of each group is greater than or equal to 1 and is smaller than the first preset number, the judgment and setting are performed by technical personnel in the field according to the parameters collected by the processor and actual conditions, and the final received power is required to be greater than or equal to the minimum allowed power and is smaller than or equal to the maximum allowed power, and all the number settings which meet the requirements are all within the protection range of the patent.
The laser grouping mode is that grouping is performed in a mode from top to bottom; and the main laser in each corresponding laser group is the laser with the smallest number in the group; or, according to the preset stepping length, selecting the number of the corresponding laser to meet the requirement of the laser group formed by the matched number of lasers under the corresponding preset stepping length span; and the master laser in each respective laser group is the laser numbered centrally within the respective group.
In a first method of selecting a master laser: all the lasers are numbered, the numbers of the lasers from top to bottom are increased in sequence, and after the lasers are grouped from top to bottom, the laser with the lowest number, which is the topmost laser in each group, is selected as the main laser.
In the second method for selecting the master laser, the preset step length is set by a person skilled in the art according to actual situations, all step lengths meeting the situations are within the protection range of the patent, and the master laser selects the laser with the central serial number in each group so as to enable the modulation change amplitude of each laser to be approximately the same, thereby improving the working stability and reliability of the laser.
The packaging form of the optical module including SFP or XFP, or other packaging forms capable of achieving the same effect, shall be within the scope of protection of the present patent.
Example 2:
In this embodiment, the optical module includes 20 lasers, where each 4 lasers are a group, a first laser in each 4 lasers is a master laser, and an optical signal sent by each group of lasers is based on the first laser in each group, and this embodiment shows the modified optical power report of the 2 nd laser in the 20 lasers.
As shown in fig. 4, the steps are as follows:
in step 301, two calibration points are selected, wherein the first calibration point is located at a position 2dB lower than the optical power, and the second calibration point is located at a position 1dB higher than the optical power.
In step 302, the 20 lasers are individually turned on, and the current analog-to-digital conversion value ADIbias and the optical power P of the 2 nd laser at the first calibration point and the second calibration point are recorded.
In step 303, an equation set is established using the first calibration point and the second calibration point to obtain an optical power reporting curve C of the 2 nd laser when the laser is in single on, where the optical power reporting curve C of the 2 nd laser when the laser is in single on is as follows:
P＝K 2 *ADIbias+offset 2 ；
in step 304, when the other lasers in the group of the 2 nd laser are on singly, the crosstalk value brought to the 2 nd laser under the current at the first calibration point and the current at the second calibration point is recorded at the same time.
In step 305, an equation set is established by using the first calibration point and the second calibration point, so as to obtain a relation curve D between the current value of the other laser under single-open and the crosstalk value brought to the 2 nd laser, as follows:
when the 1 st laser in the same group is singly switched on, the cross talk value relation curve D between the 1 st laser and the 2 nd laser is as follows:
Ibias＝K 12 *ADbias+offset 12 ；
when the 3 rd laser in the same group is singly opened, the cross-talk value relation curve D between the 3 nd laser and the 2 nd laser is as follows:
Ibias＝K 32 *ADbias+offset 32 ；
when the 4 th laser in the same group is singly switched on, the cross talk value relation curve D between the 4 th laser and the 2 nd laser is as follows:
Ibias＝K 42 *ADbias+offset 42 ；
in step 306, when the optical module is working normally, all the lasers are fully turned on, and the current value Ibias is substituted into the three relation curves D, so as to respectively obtain the crosstalk value ADbias of the 2 nd laser from the 1 st laser 12 The crosstalk value of the 2 nd laser from the 3 rd laser is ADbias 32 The 2 nd laser receives the crosstalk value ADbias from the 4 th laser 42 The total crosstalk value ADbias suffered by the 2 nd laser 2 The following:
ADbias 2 ＝ADbias 12 +ADbias 32 +ADbias 42 ；
in step 307, the current analog-to-digital conversion value ADIbias when the optical module normally works is subtracted by the total crosstalk value ADbias2 suffered by the 2 nd laser, and the current analog-to-digital conversion value ADIbias is substituted into the optical power reporting curve C when the 2 nd laser is singly switched on, and the corrected optical power reporting curve of the 2 nd laser is as follows:
P＝K 2 *(ADIbias-ADbias 2 )+offset 2 ；
when the optical module normally works, the optical power is reported according to the modified optical power reporting curve of the 2 nd laser, so that errors caused by crosstalk values are avoided more accurately, and the optical power is reported more accurately.
Example 3:
fig. 5 is a schematic device diagram of an optical power reporting apparatus of an optical module according to an embodiment of the present invention. The optical power reporting apparatus of the optical module of this embodiment includes one or more processors 51 and a memory 52. In fig. 5, one processor 51 is taken as an example.
The processor 51 and the memory 52 may be connected by a bus or other means, such as the bus connection in fig. 5.
The memory 52 is a non-volatile computer-readable storage medium, and can be used to store a non-volatile software program and a non-volatile computer-executable program, such as the optical power reporting method of the optical module in embodiment 1. The processor 51 executes the optical power reporting method of the optical module by running the nonvolatile software program and instructions stored in the memory 52.
The memory 52 may include high speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, the memory 52 may optionally include memory located remotely from the processor 51, and these remote memories may be connected to the processor 51 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The program instructions/modules are stored in the memory 52, and when executed by the one or more processors 51, perform the optical power reporting method of the optical module in the above embodiments 1 and 2, for example, perform the steps shown in fig. 1, fig. 3, and fig. 4 described above.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A method for reporting optical power of an optical module is characterized in that a processor of the optical module controls a first preset number of lasers to transmit optical signals to a second optical module on an opposite end node, and reports the optical power, specifically:
the processor sets one or more lasers into a group and works under the same wavelength, before working, a current analog-to-digital conversion value ADIbias and optical power P of each laser in the same group under the condition of single-open are recorded to obtain an optical power reporting curve C of each single-open laser, and crosstalk values ADbias suffered by each other unopened laser in the same group are recorded, so that a relation curve D between the current Ibias of each single-open laser and the crosstalk values ADbias suffered by each unopened laser in the same group is obtained; when the optical power reporting curve C works, all the lasers are fully opened, each laser obtains each crosstalk value from other lasers in the same group according to the relation curve D, and the current analog-to-digital conversion value ADIbias of each laser minus each corresponding crosstalk value is input into the optical power reporting curve C to obtain the optical power without optical crosstalk and report the optical power;
the processor acquires the intensity of the optical signal of the second detector at the corresponding wavelength acquired by the second optical module on the opposite end node, so as to determine the number of lasers belonging to the same laser group and working at the same wavelength to be established in the using process.
2. The method for reporting optical power of an optical module according to claim 1, wherein the recording a current analog-to-digital conversion value ADIbias and an optical power P of each laser in the same group under a single-open condition to obtain an optical power reporting curve C of each single-open laser includes:
selecting a first calibration point and a second calibration point of the optical module, and recording a current analog-to-digital conversion value ADIbias corresponding to the first calibration point of the mth laser in any group by the processor under the condition of single-on 1m Corresponding optical power P 1m And converting the current analog-to-digital conversion value ADIbias 1m And optical power P 1m Establishing a first relational expression; the processor records the current analog-to-digital conversion value ADIbias corresponding to the second calibration point of the mth laser under the condition of single-on 2m Corresponding optical power P 2m And converting the current analog-to-digital conversion value ADIbias 2m And optical power P 2 Establishing a second relational expression; forming a first equation set by the first relational expression and the second relational expression, and obtaining the mth laser according to the first equation setReporting a curve C to the optical power;
the first program group is as follows:
the optical power reporting curve C of the mth laser is:
P＝K m *ADIbias+offset m ；
wherein K is a coefficient, offset is an offset, K m Reporting coefficient of curve C for optical power of the mth laser, the offset m And reporting the offset of a curve C to the optical power of the mth laser, wherein the mth laser is the mth laser from top to bottom in any group of lasers in the optical module, and m is less than or equal to a first preset number and is greater than 0.
3. The method for reporting optical power of an optical module according to claim 2, wherein the recording of the crosstalk value ADbias received by each of the other unopened lasers in the same group so as to obtain a relationship curve D between the current Ibias of each single-opened laser and the crosstalk value ADbias received by each of the unopened lasers in the same group specifically includes:
the current Ibias of the nth single-open laser in any group at the first calibration point 1n The crosstalk value ADbias received by the m-th unopened laser in the same group 1nm Establishing a third relational expression; the current Ibias of the nth single-open laser at the second calibration point 2n The value of crosstalk ADbias experienced by the m-th unopened laser in the same group 2nm Establishing a fourth relational expression, establishing a second equation set by using the third relational expression and the fourth relational expression to obtain a relational curve D of the current Ibias of the nth single-open laser in the same group and a crosstalk value ADbias applied to the mth unopened laser, wherein the relational curve D corresponds to the mth unopened laser;
the second equation set is:
the relation curve D of the current of the nth single-open laser and the current applied to the mth unopened laser is as follows:
Ibias＝K nm *ADbias+offset nm ；
wherein, K is nm The offset is a coefficient of a curve D of the current Ibias of the nth single-opening laser in the same group and the crosstalk value ADbias applied to the mth single-opening laser nm The offset of a relation curve D between the current Ibias of the nth single-opening laser in the same group and the crosstalk value ADbias applied to the mth un-opening laser is obtained, the nth laser is the nth laser from top to bottom in any group of lasers in the optical module, n is smaller than or equal to a first preset number and larger than 0, and n is not equal to m.
4. The method for reporting optical power of an optical module according to claim 3, wherein when all the lasers are fully turned on, each laser obtains, according to the relationship curve D, each crosstalk value from another laser in the same group, and specifically includes:
when all lasers in the same group are fully opened to normally work, substituting the current value Ibias of the optical module in normal work into all the relation curves D corresponding to the mth unopened lasers to obtain all crosstalk values of the mth unopened lasers corresponding to the relation curves D when other lasers are singly opened, adding all crosstalk values of the mth unopened lasers corresponding to the relation curves D to obtain the total crosstalk value ADbias of the mth unopened lasers corresponding to the relation curves D m 。
5. The method for reporting optical power of an optical module according to claim 3, wherein the step of subtracting the corresponding crosstalk value from the current analog-to-digital conversion value ADIbias of each laser is performed on the optical power reporting curve C to obtain the optical power without optical crosstalk and report the optical power, specifically comprises:
when all lasers in the same group are fully opened to work normally, subtracting the total crosstalk value ADbias suffered by the mth unopened laser from the current analog-to-digital conversion value ADIbias of the mth unopened laser m Substituting the optical power into the optical power reporting curve C of the mth laser to obtain the corrected optical power P of the mth laser m ；
The optical power of the mth laser is substituted into the optical power reporting curve C:
P＝K m *(ADIbias-ADbias m )+offset m 。
6. the method for reporting optical power of an optical module according to claim 1, wherein after the optical module determines the laser groups and the master-slave relationship of the number of lasers in each group, the method further comprises;
the processor sends configuration content containing the laser groups and the laser master-slave relation in each laser group to a second optical module on an opposite end node;
after the second optical module on the opposite end node acquires the configuration content through the second detector, the wavelength of an optical signal emitted by each laser in a corresponding group of laser groups is based on the emission wavelength of the main laser in the group; then, among the corresponding first preset number of second detectors on the second optical module on the opposite end node, the second detectors on the optical path matched with the optical signal wavelength of the main laser in each laser group enter a working state, and the remaining second detectors are in a standby state or a silent state.
7. The method for reporting optical power of an optical module according to claim 1, wherein each of the lasers in the first preset number has a default optical signal wavelength for initial operation in an initial state, that is, before the configuration process is completed;
when the number of the lasers contained in the laser group is determined to be one through the configuration process, the processor sends respective independent data contents to be sent to the laser drivers of the first preset number corresponding to the lasers of the first preset number, and sends optical signals carrying the corresponding data contents to be sent modulated by the respective laser drivers in parallel through the lasers of the first preset number.
8. The optical power reporting method of the optical module according to claim 1, wherein the processor obtains an optical signal intensity of a second detector at a corresponding wavelength, which is acquired by a second optical module on the peer node, so as to determine the number of lasers belonging to the same laser group and operating at the same wavelength, which is to be established in a use process, specifically:
after acquiring one or more parameters of the length of an optical fiber link, the number of repeaters and the number of optical fiber fusion points between the optical fiber link and a second optical module on an opposite end node, the processor correspondingly selects a matched number of lasers in a first round of test according to historical experience, sets the lasers to be transmitted at the same optical signal wavelength, and gives the same electrical signal test data content to respective laser drivers so as to drive the corresponding lasers to synchronously send optical signals.
9. The method for reporting optical power of an optical module according to any one of claims 6 to 8, wherein the lasers are grouped in a manner that the grouping is performed sequentially from top to bottom; and the main laser in each corresponding laser group is the laser with the smallest number in the group; or, according to the preset stepping length, selecting the number of the corresponding laser to meet the requirement of the laser group formed by the matched number of lasers under the corresponding preset stepping length span; and the master laser in each respective laser group is the laser numbered centrally within the respective group.
10. The device for reporting the optical power of the optical module is characterized by comprising at least one processor and a memory which is in communication connection with the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executable by the processor to perform the method for reporting optical power of the optical module according to any one of claims 1 to 9.
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