CN115021811B - 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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- CN115021811B CN115021811B CN202210748457.5A CN202210748457A CN115021811B CN 115021811 B CN115021811 B CN 115021811B CN 202210748457 A CN202210748457 A CN 202210748457A CN 115021811 B CN115021811 B CN 115021811B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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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
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07955—Monitoring or measuring power
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- 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
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Abstract
The invention provides a method and a device for reporting optical power of an optical module, under the condition that lasers in the optical module are turned on more and are grouped so as to increase the optical signal intensity, before the operation, the current and the optical power of each laser are recorded by turning on each laser, and when each laser is turned on, the crosstalk values of other lasers are recorded, and a relation curve between the lasers is established, and when the optical module works normally, the crosstalk values suffered by each laser are obtained according to the relation curve, so that the optical crosstalk is eliminated accurately, and more accurate optical power is obtained for reporting.
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
The optical module (Optical transceiver) is used as an important active optical device, and realizes the electric-optical conversion and the optical-electric conversion of signals at a transmitting end and a receiving end respectively, and because the transmission of communication signals mainly uses optical fibers as media, the generating end, the transmitting end, the processing end and the receiving end process electric signals, the optical module has wide and continuously growing market space, the upstream of the optical module mainly comprises an optical chip and a passive optical device, and the downstream clients mainly comprise telecom main equipment manufacturers, 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 a TOSA (Transmitter Optical Subassembly, light emission sub-module) and a ROSA (Receiver Optical Subassembly, light receiving sub-module) through the traditional TO packaging, meanwhile, the matched electric Chip is mounted On a PCB (Printed Circuit Board ), then the optical channel and the optical fiber are connected through precise coupling, and finally the integrated optical module is packaged, and the integrated optical module is mainly applied TO Chip On Board (Chip On board) with short-distance multimode, and the Chip is mounted On the PCB through a special bonding welding process by adopting a non-airtight packaging method.
In recent years, large data centers have rapidly evolved, and the rate of interconnection has rapidly advanced from 100G to 400G. The demand of the optical module is increased in geometric progression, and the improvement of the service performance and the transmission distance of the optical module is a trend, so that it is very important to effectively eliminate the influence of optical crosstalk under the situation of a multi-opening laser.
Therefore, on the basis of ensuring that the receiving power of the optical module is within the allowable range, the performance and the transmission distance of the optical module need to be improved, which is a problem to be solved in the technical field.
Disclosure of Invention
The invention aims to solve the technical problem that under the condition of a multi-opening laser of an optical module, 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, an optical power reporting method 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 a peer node, and performs reporting of optical power, specifically:
the processor sets one or more lasers as a group and works under the same wavelength, before working, records a current analog-to-digital conversion value ADIbias and optical power P of each laser in the same group under the single-on condition to obtain an optical power reporting curve C of each single-on laser, and records crosstalk values ADbias suffered by other non-on lasers in the same group to obtain a relation curve D of the current Ibias of each single-on laser and the crosstalk values ADbias suffered by the non-on lasers in the same group; when the system works, all lasers are fully opened, each laser obtains each crosstalk value from other lasers in the same group according to the relation curve D, the current analog-to-digital conversion value ADIbias of each laser subtracts each corresponding crosstalk value and then substitutes the current analog-to-digital conversion value ADIbias into the optical power reporting curve C, and the optical power with optical crosstalk removed is obtained and reported;
The processor acquires the optical signal intensity 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 which are required to be established to work at the same wavelength and are in the same laser grouping.
Preferably, the recording 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, to obtain an optical power reporting curve C of each single-on laser 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 mth laser in any group at the first calibration point under the single-on condition by the processor 1m And corresponding optical power P 1m And analog-to-digital converting the current to a value ADIbias 1m And optical power P 1m Establishing a first relation; the processor records the current analog-to-digital conversion value ADIbias corresponding to the mth laser at the second standard point under the single-on condition 2m And corresponding optical power P 2m And analog-to-digital converting the current to a value ADIbias 2m And optical power P 2 Establishing a second relation; forming a first equation set by the first relation and the second relation, and obtaining the optical power reporting curve C of the mth laser according to the first equation set;
The first system of equations is:
the optical power reporting curve C of the mth laser is:
P＝K m *ADIbias+offset m ；
wherein K is a coefficient, the offset is an offset, and K is m Reporting the coefficient of curve C for the optical power of the mth laser, the offset m And the offset of the optical power reporting curve C of the mth laser is the mth laser from top to bottom in any group of lasers in the optical module, and the m is smaller than or equal to a first preset number and larger than 0.
Preferably, the recording the crosstalk value ADbias of each other non-open laser in the same group, so as to obtain a relation curve D between the current Ibias of each single-open laser and the crosstalk value ADbias of each non-open laser in the same group specifically includes:
the current Ibias of the nth single-open laser in any group at the first standard point 1n With the crosstalk value ADbias suffered by the mth unopened laser in the same group 1nm Establishing a third relation; the current Ibias of the nth single-open laser at the second standard point 2n Cross-talk value ADbias experienced by the mth unopened laser in the same group 2nm Establishing a fourth relation, and establishing a second equation set by the third relation and the fourth relation to obtain a relation curve D of the current Ibias of the nth single-open laser in the same group and the crosstalk value ADbias applied to the mth non-open laser, wherein the relation curve D corresponds to the mth non-open laser;
The second system of equations is:
the relation D between the current of the nth single-open laser and the current applied to the mth non-open laser is:
Ibias＝K nm *ADbias+offset nm ；
wherein the K is nm Is the coefficient of the relation curve D between the current Ibias of the nth single-open laser and the crosstalk value ADbias applied to the mth non-open laser in the same group, the offset nm The offset is the offset of a relation curve D of the current Ibias of the nth single-open laser in the same group and the crosstalk value ADbias applied to the mth non-open laser, wherein the nth laser is the nth laser from top to bottom in any group of lasers in the optical module, the 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 lasers are fully on, each laser derives respective crosstalk values from other lasers in the same group according to the relation curve D, and specifically includes:
when all lasers in the same group are fully opened to perform normal operation, substituting the current value Ibias of the optical module in normal operation into all the relation curves D corresponding to the mth unopened laser to obtain the relation curve D corresponding toAll crosstalk values of the mth non-open laser which are subjected to when other lasers are singly opened are added, and the total crosstalk value ADbias of the mth non-open laser which is corresponding to the relation curve D is obtained m 。
Preferably, the subtracting the corresponding crosstalk value from the current analog-to-digital conversion value ADIbias of each laser is substituted into the optical power reporting curve C to obtain the optical power from which the optical crosstalk is removed and report the optical power, which specifically includes:
when all lasers in the same group are fully on to normally work, subtracting the total crosstalk value ADbias suffered by the mth non-on laser from the current analog-to-digital conversion value ADIbias of the mth non-on laser m Substituting the corrected optical power P of the mth laser 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 reporting curve C substituted into the mth laser is as follows:
P＝K m *(ADIbias-ADbias m )+offset m 。
preferably, after the optical module determines the laser grouping and the master-slave relationship of the number of lasers in each grouping, the method further comprises the steps of;
the processor sends configuration content containing the laser groups and the master-slave relationship of the lasers in each laser group to a second optical module on the opposite end node;
after the second optical module on the opposite end node obtains the configuration content through the second detector, the wavelength of the optical signal emitted by each laser in the corresponding group of laser groups is based on the emission wavelength of the main laser in the group; and correspondingly, in the first preset number of second detectors on the second optical module on the opposite end node, the second detectors on the optical paths matched with the optical signal wavelengths of the main lasers in each laser group enter a working state, and the rest second detectors are in a standby state or a silence state.
Preferably, the first preset number of lasers have respective default optical signal wavelengths for initial operation in an initial state, that is, before the configuration process is completed;
when the number of lasers contained in the laser grouping is confirmed to be one through a configuration process, the processor sends independent data contents to be sent to a first preset number of laser drivers corresponding to the first preset number of lasers, and optical signals carrying the corresponding data contents to be sent are modulated by the laser drivers in parallel through the first preset number of lasers.
Preferably, the processor acquires the optical signal intensity of the second detector at the corresponding wavelength collected by the second optical module on the opposite end node, so as to determine the number of lasers to be built in the use process and working at the same wavelength, wherein the number of lasers is in the same laser group, specifically:
after the processor acquires one or more parameters of the length of the optical fiber link between the processor and the second optical module on the opposite terminal node, the number of the repeaters and the number of the optical fiber fusion points, the processor correspondingly selects the matched number of lasers in the first round of test according to historical experience, sets the lasers to transmit with the same optical signal wavelength, and gives the respective laser drivers the same electrical signal test data content so as to drive the corresponding lasers to synchronously transmit the optical signals.
Preferably, the grouping mode of the lasers is that the lasers are grouped in a mode of being sequentially from top to bottom; and the primary laser in each corresponding laser group is the laser with the smallest number in the group; or selecting the number of the corresponding lasers to meet the span of the corresponding preset stepping length according to the preset stepping length, and forming laser grouping by the matched number of lasers; while the main laser in each respective laser group is the centrally numbered laser within the respective group.
In a second aspect, an optical power reporting device of an optical module, the device comprising at least one processor, and a memory communicatively coupled 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 are used for executing the optical power reporting method of the optical module.
The invention provides a method and a device for reporting optical power of an optical module, under the condition that lasers in the optical module are turned on more and are grouped so as to increase the optical signal intensity, before the operation, the current and the optical power of each laser are recorded by turning on each laser, and when each laser is turned on, the crosstalk values of other lasers are recorded, and a relation curve between the lasers is established, and when the optical module works normally, the crosstalk values suffered by each laser are obtained according to the relation curve, so that the optical crosstalk is eliminated accurately, and more accurate optical power is obtained for reporting.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings that are required to be used in the embodiments of the present invention will be briefly described below. It is evident that the drawings described below are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
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 simplified schematic diagram of an optical module in an optical power reporting method of the optical module according to an 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 diagram of an apparatus for reporting optical power of an optical module according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In the description of the present invention, the terms "inner", "outer", "longitudinal", "transverse", "upper", "lower", "top", "bottom", etc. refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Example 1:
the embodiment 1 of the invention provides a method for reporting optical power of an optical module, wherein a processor of the optical module controls a first preset number of lasers to transmit optical signals to a second optical module on a peer node, and reports the optical power.
As shown in fig. 1, in particular:
in step 101, the processor sets one or more lasers into a group and operates at the same wavelength.
The processor sends an electric signal to the laser drivers which need to work in the first preset number of laser drivers, the laser drivers which receive the electric signal drive the corresponding lasers to be started, one or more lasers are used 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, the same group of lasers are driven 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 acquiring the optical signal intensity of a second detector under the corresponding wavelength acquired by a second optical module on an opposite-end node.
In step 102, before working, current analog-to-digital conversion values ADIbias and optical power P of each laser in the same group under the single-on condition are recorded to obtain an optical power reporting curve C of each single-on laser.
After the processor groups all the lasers, before formal work, crosstalk which each laser receives is required to be measured, when any one of the lasers in any group is singly opened and detected, all other lasers in the optical module are in a closed state, when any one of the lasers is singly opened, all parameters are recorded, wherein Ibias is a current value when the module is adjusted to meet the protocol requirement characteristic, the optical power of the singly opened laser is recorded as P, and the current analog-digital conversion value is recorded as ADIbias.
In step 103, the crosstalk value ADbias of each other non-open laser in the same group is recorded, so as to obtain a relationship curve D between the current Ibias of each single-open laser and the crosstalk value ADbias of each non-open laser in the same group.
The lasers of the same group only need to consider the crosstalk from the other lasers of the same group, so that only the crosstalk from the single-on laser received by the other lasers of the same group is recorded at a time, and the crosstalk is related to the current Ibias of the single-on laser by a curve D.
In step 104, all lasers are fully on, and each laser derives a respective crosstalk value from the other lasers in the same group according to the relationship D.
When the optical module works normally, all lasers are fully opened, and the current Ibias obtained when the optical module works normally is substituted into each relation curve D obtained in the step 103, so that the crosstalk value of the same laser received by other lasers from the same group can be obtained, and the crosstalk values received by the same laser are added, namely the total crosstalk value received by the lasers when the lasers work normally.
In step 105, the current analog-to-digital conversion value ADIbias of each laser is subtracted by each corresponding crosstalk value and then substituted into the optical power reporting curve C, so as to obtain the optical power from which the optical crosstalk is removed and report the optical power.
And subtracting the total crosstalk value corresponding to the lasers from the current Ibias when the optical module normally works, namely, removing crosstalk caused by all other lasers in the same group for the lasers individually, so that the current value Ibias is the most accurate at the moment, and substituting the current value Ibias into an optical power reporting curve C corresponding to the lasers in the step 102, thereby obtaining and reporting relatively accurate optical power.
The processor acquires the optical signal intensity 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 which are required to be established to work at the same wavelength and are in the same laser grouping.
As shown in fig. 2, the optical module includes a first preset number of laser drivers, a first preset number of lasers, a combiner, a demultiplexer and a first preset number of first detectors, where the laser drivers and the lasers are electrically connected; each laser and the combiner are coupled in an optical path; the optical path coupling is accomplished to the wave separator with first detector, the optical module divide into transmitting end and receiving end, and the wave combiner on the transmitting end of the first optical module of one end links to each other through optic fibre with the wave separator of the receiving end of the second optical module on the opposite terminal node, the wave separator on the receiving end on the first optical module links to each other through optic fibre with the wave combiner of the transmitting end of the second optical module on the opposite terminal node.
And one or more lasers are used as a group in all the started lasers, the laser drivers corresponding to the same group of lasers receive the same electric signals from the processor, so that the same group of lasers are driven to transmit optical signals with the same wavelength, the number of each group of 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.
Grouping all lasers in the optical module, and when the lasers in the same group send optical signals with the same wavelength to the opposite-end optical module, the opposite-end optical module only receives the optical signals with the same type of wavelength once under the action of the combiner and the splitter, 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 of the above, when the actual optical power is reported, crosstalk brought by each laser in the same group of lasers needs to be accurately eliminated, when each laser is calibrated and recorded in a single-cut mode, current and voltage parameters of each single-cut laser are recorded, crosstalk values suffered by other lasers are recorded, a relation curve is established between corresponding current and the crosstalk values suffered by each laser, when the lasers are fully opened in normal operation, all the crosstalk values suffered by each laser from other lasers are received according to the current values, optical power calculation is performed after the crosstalk values are removed, and therefore, compared with the fact that the same crosstalk values are uniformly subtracted by all the lasers, the accuracy of the finally reported optical power is improved.
Recording 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 to obtain an optical power reporting curve C of each single-on laser, wherein the method specifically comprises the following steps of:
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 mth laser in any group at the first calibration point under the single-on condition by the processor 1m And corresponding optical power P 1m And analog-to-digital converting the current to a value ADIbias 1m And optical power P 1m Establishing a first relation; the processor records the current analog-to-digital conversion value ADIbias corresponding to the mth laser at the second standard point under the single-on condition 2m And corresponding optical power P 2m And analog-to-digital converting the current to a value ADIbias 2m And optical power P 2 Establishing a second relation; forming a first equation set by the first relation and the second relation, and obtaining the optical power reporting curve C of the mth laser according to the first equation set;
the first system of equations is:
the optical power reporting curve C of the mth laser is:
P＝K m *ADIbias+offset m ；
wherein K is a coefficient, the offset is an offset, and K is m Reporting the curvature for the optical power of the mth laserCoefficients of line C, the offset m And the offset of the optical power reporting curve C of the mth laser is the mth laser from top to bottom in any group of lasers in the optical module, and the m is smaller than or equal to a first preset number and larger than 0.
The mth laser represents any one laser in any group of lasers in the optical module, and all lasers in the optical module are applicable; the single-opening-finger laser module of the laser only starts one laser, all other lasers are closed, and all parameters of the single-opening laser are recorded; when the first calibration point and the second calibration point are selected, as the threshold value of the optical device is increased and the inclined efficiency is reduced in the long-term use process according to the characteristics of the laser, the possibility of increasing the transmitted light power is less and generally gradually reduced in the normal application process, so that the selection of the first calibration point and the second calibration point should be selected by referring to the current value which is actually adjusted in order to ensure that the light power of the optical device is accurately reported in the long-term operation process, and the selection of all calibration points meeting the actual situation needs should be within the protection scope of the patent by a person skilled in the art according to the actual situation; and establishing an equation set through the selected two calibration point records to obtain an optical power reporting curve C under the condition that crosstalk does not exist in the single laser.
While the lasers are on singly, the crosstalk caused by the single-on lasers to other lasers in the same group needs to be recorded, and a relation between the crosstalk and the current on each non-on laser is established.
The recording of the crosstalk value ADbias suffered by each other non-open laser in the same group, so as to obtain a relation curve D between the current Ibias of each single-open laser and the crosstalk value ADbias suffered by each non-open laser in the same group, specifically includes:
the current Ibias of the nth single-open laser in any group at the first standard point 1n With the crosstalk value ADbias suffered by the mth unopened laser in the same group 1nm Establishing a third relation; placing the nth single-turn laser at a second calibration pointIs of the current Ibias of (a) 2n Cross-talk value ADbias experienced by the mth unopened laser in the same group 2nm Establishing a fourth relation, and establishing a second equation set by the third relation and the fourth relation to obtain a relation curve D of the current Ibias of the nth single-open laser in the same group and the crosstalk value ADbias applied to the mth non-open laser, wherein the relation curve D corresponds to the mth non-open laser;
the second system of equations is:
the relation D between the current of the nth single-open laser and the current applied to the mth non-open laser is:
Ibias＝K nm *ADbias+offset nm ；
Wherein the K is nm Is the coefficient of the relation curve D between the current Ibias of the nth single-open laser and the crosstalk value ADbias applied to the mth non-open laser in the same group, the offset nm The offset is the offset of a relation curve D of the current Ibias of the nth single-open laser in the same group and the crosstalk value ADbias applied to the mth non-open laser, wherein the nth laser is the nth laser from top to bottom in any group of lasers in the optical module, the n is smaller than or equal to a first preset number and larger 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 lasers in the optical module are applicable; and recording crosstalk values corresponding to current values of all the non-opened lasers on the first calibration point and the second calibration point in the same group of the single-opened lasers, performing single-opening and recording on each laser, and after establishing a relation curve D of the current values and the crosstalk values of all the non-opened lasers, setting up a relation curve D of the number of other lasers in the group of the single-opened lasers, wherein the relation curve D is used for representing crosstalk brought to the other lasers in the same group by one laser.
In actual operation, the lasers of the optical module are fully turned on, and at this time, all crosstalk values from other lasers in the same group are received by one laser according to the relation curve D.
When all lasers are fully on, each laser obtains each crosstalk value from other lasers in the same group according to the relation curve D, and the method specifically comprises the following steps:
when all lasers in the same group are fully opened to perform normal operation, substituting the current value Ibias of the optical module in normal operation into all relation curves D corresponding to the mth non-opened laser to obtain all crosstalk values received by the mth non-opened laser corresponding to the relation curve D when other lasers are singly opened, and adding all crosstalk values received by the mth non-opened laser corresponding to the relation curve D to obtain the total crosstalk value ADbias received by the mth non-opened laser corresponding to the relation curve D m 。
The current on the same group of lasers is the same in normal operation, the current values in operation are substituted into all relation curves D of the lasers one by one, the crosstalk values from other lasers which the lasers can receive are correspondingly calculated one by one, the crosstalk values are all added, namely the total crosstalk value which the lasers can receive in normal operation, when the mth lasers are in the group, the total crosstalk value ADbias is that m The preparation process comprises the following steps:
ADbias m ＝ADbias 1m +ADbias 2m +…+ADbias (m-1)m +ADbias (m+1)m +…+ADbias (h-1)m +ADbias hm
the ADbias 1m For the crosstalk value to the mth laser when the 1 st laser in the same group is turned on singly, the ADbias 2m For the crosstalk value to the mth laser when the 2 nd laser in the same group is singly switched on, the ADbias (m-1)m For the crosstalk value to the mth laser when the mth-1 lasers in the same group are turned on singly, the ADbias (m+1)m For the crosstalk value to the mth laser when the (m+1) th laser in the same group is singly switched on, the ADbias (h-1)m For the h-1 th laser in the same groupCross-talk value to the mth laser at single turn-on, the ADbias hm And for the crosstalk value brought to the mth laser when the mth laser in the same group is turned on singly, the ellipses in the middle of the formula sequentially increase the crosstalk value applied to the mth laser for each single-on laser serial number.
And subtracting the total crosstalk value from the current value, and substituting the subtracted total crosstalk value into an optical power reporting curve C of the corresponding laser to obtain the power of the corresponding laser.
The method comprises the steps of subtracting each corresponding crosstalk value from a current analog-digital conversion value ADIbias of each laser, substituting the subtracted value into the optical power reporting curve C to obtain the optical power with the optical crosstalk removed, and reporting the optical power, and specifically comprises the following steps:
When all lasers in the same group are fully on to normally work, subtracting the total crosstalk value ADbias suffered by the mth non-on laser from the current analog-to-digital conversion value ADIbias of the mth non-on laser m Substituting the corrected optical power P of the mth laser 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 reporting curve C substituted into the mth laser is as follows:
P＝K m *(ADIbias-ADbias m )+offset m 。
the total crosstalk value suffered by each laser in the optical module is subtracted by the current in normal operation, namely the current value after the crosstalk is eliminated for each laser, and the current value can be regarded as the current value under the single-on condition of each laser and is substituted into the laser optical power reporting curve C to obtain the optical power after the crosstalk is eliminated.
After the lasers are grouped, the wavelengths of the optical signals sent by the lasers in the same group are all determined by the main lasers in the same group, so that one main laser is used for determining the wavelengths of the optical signals sent by each group of lasers, and the other lasers are slave lasers, and the wavelengths of the optical signals sent by the slave lasers are consistent with those of the main lasers.
In order to increase the transmission distance of the optical module and the intensity of the optical signal, the lasers in the optical module need to be grouped.
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 collected by the second optical module on the opposite node is obtained.
The second optical module is arranged on the opposite end node of the first optical module and is connected with the opposite end node through optical fibers to receive, analyze and feed back optical signals, and the corresponding wavelength is the wavelength of the optical signals emitted by the main adjustable lasers in the group after grouping.
In step 202, the number of tunable lasers within the same tunable laser group to be set up during use, which operate at the same wavelength and for which the corresponding laser driver obtains the same transmit data content, is determined.
The laser drivers corresponding to the same group of adjustable lasers receive the same electric signals from the processor, so that the same group of adjustable lasers are driven 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, 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 of each group is ensured to be consistent.
After the optical module determines the laser grouping and the master-slave relationship of the number of lasers in each grouping, the method further comprises the following steps;
the processor sends configuration content containing the laser groups and the master-slave relationship of the lasers in each laser group to a second optical module on the opposite end node;
after the second optical module on the opposite end node obtains the configuration content through the second detector, the wavelength of the optical signal emitted by each laser in the corresponding group of laser groups is based on the emission wavelength of the main laser in the group; and correspondingly, in the first preset number of second detectors on the second optical module on the opposite end node, the second detectors on the optical paths matched with the optical signal wavelengths of the main lasers in each laser group enter a working state, and the rest second detectors are in a standby state or a silence state.
The second detectors for receiving the detection signals in the configuration process may be set as second detectors numbered 1 among the first preset number of second detectors in the second optical module by default.
Wherein, the number of each group of lasers is greater than or equal to 1, when the number of the same group of lasers is greater than 1, the lasers of the same group comprise a master-slave relationship, wherein the number of the main lasers in each group of lasers is 1, the rest lasers in the same group are slave lasers, the slave lasers are based on the optical signals emitted by the main lasers, the wavelengths of the optical signals emitted by the slave lasers are consistent with the wavelengths emitted by the main lasers, only the second detectors on the second optical modules on the opposite end nodes corresponding to the main lasers are started, and the rest second detectors are in a standby state or a silent state and are used for receiving the optical signals emitted by the main lasers, so that the second detectors on the second optical modules on the opposite end nodes only correspondingly receive one optical signal of each different wavelength.
The standby state of the detector can provide weak driving signals, namely, the state that the corresponding detection sensitivity is more is used for saving power consumption; the silence 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 may be PINs or APDs, or other detectors capable of achieving the same effect are within the scope of the present patent,
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 lasers contained in the laser grouping is confirmed to be one through a configuration process, the processor sends independent data contents to be sent to a first preset number of laser drivers corresponding to the first preset number of lasers, and optical signals carrying the corresponding data contents to be sent are modulated by the laser drivers in parallel through the first preset number of lasers.
When each laser is a group, the master lasers and the slave lasers do not need to be selected, the first preset number of lasers are all master lasers, the master lasers all transmit optical signals with different wavelengths, and the optical signals are transmitted to the corresponding second detectors after being demultiplexed by the demultiplexer of the second optical module of the opposite-end node.
The processor is configured to set a mode that one or more lasers work at the same wavelength in a configuration process, and obtain the optical signal intensity of the second detector at the corresponding wavelength collected by the second optical module on the opposite end node, specifically:
after the processor acquires one or more parameters of the length of the optical fiber link between the processor and the second optical module on the opposite terminal node, the number of the repeaters and the number of the optical fiber fusion points, the processor correspondingly selects the matched number of lasers in the first round of test according to historical experience, sets the lasers to transmit with the same optical signal wavelength, and gives the respective laser drivers the same electrical signal test data content so as to drive the corresponding lasers to synchronously transmit the optical signals.
When the first preset number of laser drivers are grouped, a processor is required to acquire various parameters including the length of an optical fiber link, the number of relays and the number of optical fiber fusion points of a second optical module on an opposite end node for reference, so that the number of each group of laser drivers is determined, the number of started lasers is further determined, the number of each group of laser drivers is more than or equal to 1 and less than the first preset number, judgment and setting are carried out by a person skilled in the art according to the parameters collected by the processor and the actual situation, and the final received power is required to be more than or equal to the minimum allowed power and less than or equal to the maximum allowed power, and all the number settings meeting the requirements are in the protection range of the patent.
The grouping mode of the lasers is that grouping is carried out according to a mode from top to bottom; and the primary laser in each corresponding laser group is the laser with the smallest number in the group; or selecting the number of the corresponding lasers to meet the span of the corresponding preset stepping length according to the preset stepping length, and forming laser grouping by the matched number of lasers; while the main laser in each respective laser group is the centrally numbered laser within the respective group.
In a first method of selecting a master laser: and numbering all the lasers, wherein the numbers of the lasers from top to bottom are sequentially increased, and when the lasers are grouped from top to bottom, the laser with the highest top, namely the laser with the smallest number, in each group is selected as a main laser.
In the second method for selecting the main laser, the preset step length is set by a person skilled in the art according to the actual situation, and all step lengths conforming to the situation are within the protection scope of the present patent, and the main laser selects the lasers with central numbers in each group in order to make the modulation variation amplitude of each laser approximately the same, so as to improve the stability and reliability of the laser operation.
The packaging forms of the optical module comprise SFP or XFP, or other packaging forms capable of achieving the same effect are all within the protection scope of the patent.
Example 2:
compared with embodiment 1, the embodiment of the invention provides an optical power reporting method of an optical module, which is shown in a more specific situation.
In this embodiment, the optical module has 20 lasers in total, where each 4 lasers is a group, the first laser in each 4 lasers is a main laser, and the optical signal sent by each group of lasers uses the first laser in each group as a reference, and this embodiment shows the corrected 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 a first calibration point is located 2dB below the optical power and a second calibration point is located 1dB above the optical power.
In step 302, the 20 lasers are turned on individually, 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 2 nd laser is on, where the optical power reporting curve C of the 2 nd laser when the 2 nd laser is on is as follows:
P＝K 2 *ADIbias+offset 2 ；
In step 304, the crosstalk value brought to the 2 nd laser by the other lasers in the group of the 2 nd laser under the current at the first calibration point and the second calibration point is recorded simultaneously when the other lasers are on singly.
In step 305, an equation set is established using the first calibration point and the second calibration point, so as to obtain a relationship curve D between the current value of the other lasers under single-turn-on and the crosstalk value brought to the 2 nd laser, as follows:
when the 1 st laser is on in the same group, the crosstalk 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 is on in the same group, the crosstalk value relation curve D between the 3 rd laser and the 2 nd laser is:
Ibias＝K 32 *ADbias+offset 32 ；
when the 4 th laser in the same group is turned on singly, the crosstalk value relation curve D between the 4 nd laser and the 2 nd laser is:
Ibias＝K 42 *ADbias+offset 42 ；
in step 306, when the optical module is operating normally, all lasers are fully on, and the current value Ibias at that time is substituted into the three relationship curves D to obtain the crosstalk value ADbias of the 2 nd laser from the 1 st laser 12 The 2 nd laser receives a crosstalk value of ADbia from the 3 rd lasers 32 The 2 nd laser receives a crosstalk value of ADbias from the 4 th laser 42 The 2 nd laser receives the total crosstalk value ADbias 2 The following are provided:
ADbias 2 ＝ADbias 12 +ADbias 32 +ADbias 42 ；
in step 307, the total crosstalk value ADbias2 suffered by the 2 nd laser is subtracted from the current analog-to-digital conversion value ADIbias when the optical module works normally, and substituted into the optical power reporting curve C of the 2 nd laser when the 2 nd laser is 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 works normally, the optical power is reported according to the corrected optical power reporting curve of the No. 2 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 diagram of an optical power reporting device of an optical module according to an embodiment of the invention. The optical power reporting device of the optical module of this embodiment includes one or more processors 51 and a memory 52. In fig. 5, a processor 51 is taken as an example.
The processor 51 and the memory 52 may be connected by a bus or otherwise, for example in fig. 5.
The memory 52 is used as a non-volatile computer-readable storage medium for storing 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 a non-volatile software program and instructions stored in the memory 52.
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, memory 52 may optionally include memory located remotely from processor 51, which may be connected to 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, which when executed by the one or more processors 51, perform the optical power reporting methods of the optical modules in the above-described embodiment 1 and embodiment 2, for example, perform the respective steps shown in fig. 1, 3 and 4 described above.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. The method for reporting the optical power of the 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 a peer node, and reports the optical power, specifically:
The processor sets one or more lasers as a group and works under the same wavelength, before working, records a current analog-to-digital conversion value ADIbias and optical power P of each laser in the same group under the single-on condition to obtain an optical power reporting curve C of each single-on laser, and records crosstalk values ADbias suffered by other non-on lasers in the same group to obtain a relation curve D of the current Ibias of each single-on laser and the crosstalk values ADbias suffered by the non-on lasers in the same group; when the system works, all lasers are fully opened, each laser obtains each crosstalk value from other lasers in the same group according to the relation curve D, the current analog-to-digital conversion value ADIbias of each laser subtracts each corresponding crosstalk value and then substitutes the current analog-to-digital conversion value ADIbias into the optical power reporting curve C, and the optical power with optical crosstalk removed is obtained and reported;
selecting a first calibration point and a second calibration point of the optical module, wherein the processor records the corresponding position of the mth laser in any group at the first calibration point under the single-on conditionCurrent analog-to-digital conversion value ADIbias 1m And corresponding optical power P 1m And analog-to-digital converting the current to a value ADIbias 1m And optical power P 1m Establishing a first relation; the processor records the current analog-to-digital conversion value ADIbias corresponding to the mth laser at the second standard point under the single-on condition 2m And corresponding optical power P 2m And analog-to-digital converting the current to a value ADIbias 2m And optical power P 2m Establishing a second relation; forming a first equation set by the first relation and the second relation, and obtaining the optical power reporting curve C of the mth laser according to the first equation set;
the processor acquires the optical signal intensity 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 which are required to be established to work at the same wavelength and are in the same laser grouping.
2. The method for reporting optical power of an optical module according to claim 1, wherein the first equation set is:
the optical power reporting curve C of the mth laser is:
P＝K m *ADIbias+offset m ；
wherein K is a coefficient, the offset is an offset, and K is m Reporting the coefficient of curve C for the optical power of the mth laser, the offset m And the offset of the optical power reporting curve C of the mth laser is the mth laser from top to bottom in any group of lasers in the optical module, and the m is smaller than or equal to a first preset number and larger than 0.
3. The method for reporting optical power of an optical module according to claim 2, wherein the recording the crosstalk value ADbias suffered by each other non-open laser in the same group, so as to obtain a relationship curve D between the current Ibias of each single-open laser and the crosstalk value ADbias suffered by each non-open laser in the same group specifically includes:
the current Ibias of the nth single-open laser in any group at the first standard point 1n With the crosstalk value ADbias suffered by the mth unopened laser in the same group 1nm Establishing a third relation; the current Ibias of the nth single-open laser at the second standard point 2n Cross-talk value ADbias experienced by the mth unopened laser in the same group 2nm Establishing a fourth relation, and establishing a second equation set by the third relation and the fourth relation to obtain a relation curve D of the current Ibias of the nth single-open laser in the same group and the crosstalk value ADbias applied to the mth non-open laser, wherein the relation curve D corresponds to the mth non-open laser;
the second system of equations is:
the relation D between the current of the nth single-open laser and the current applied to the mth non-open laser is:
Ibias＝K nm *ADbias+offset nm ；
wherein the K is nm Is the coefficient of the relation curve D between the current Ibias of the nth single-open laser and the crosstalk value ADbias applied to the mth non-open laser in the same group, the offset nm The offset is the offset of a relation curve D of the current Ibias of the nth single-open laser in the same group and the crosstalk value ADbias applied to the mth non-open laser, wherein the nth laser is the nth laser from top to bottom in any group of lasers in the optical module, the 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 each laser obtains each crosstalk value from other lasers in the same group according to the relation curve D when all lasers are fully on, specifically including:
when all lasers in the same group are fully opened to perform normal operation, substituting the current value Ibias of the optical module in normal operation into all relation curves D corresponding to the mth non-opened laser to obtain all crosstalk values received by the mth non-opened laser corresponding to the relation curve D when other lasers are singly opened, and adding all crosstalk values received by the mth non-opened laser corresponding to the relation curve D to obtain the total crosstalk value ADbias received by the mth non-opened laser corresponding to the relation curve D m 。
5. The method for reporting optical power of an optical module according to claim 3, wherein the subtracting each corresponding crosstalk value from the current analog-to-digital conversion value ADIbias of each laser is substituted into the optical power reporting curve C to obtain the optical power from which the optical crosstalk is removed and report the optical power, and the method specifically comprises:
When all lasers in the same group are fully on to normally work, subtracting the total crosstalk value ADbias suffered by the mth non-on laser from the current analog-to-digital conversion value ADIbias of the mth non-on laser m Substituting the corrected optical power P of the mth laser 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 reporting curve C substituted into the mth laser is as follows:
P＝K m *(ADIbias-ADbias m )+offset m 。
6. the method for reporting optical power of an optical module according to claim 1, further comprising, after the optical module determines the laser groups and the master-slave relationship of the number of lasers in each group;
the processor sends configuration content containing the laser groups and the master-slave relationship of the lasers in each laser group to a second optical module on the opposite end node;
after the second optical module on the opposite end node obtains the configuration content through the second detector, the wavelength of the optical signal emitted by each laser in the corresponding group of laser groups is based on the emission wavelength of the main laser in the group; and correspondingly, in the first preset number of second detectors on the second optical module on the opposite end node, the second detectors on the optical paths matched with the optical signal wavelengths of the main lasers in each laser group enter a working state, and the rest second detectors are in a standby state or a silence state.
7. The method for reporting optical power of an optical module according to claim 6, wherein each of the first preset number of lasers has a respective default optical signal wavelength for initial operation in an initial state, i.e., before the configuration process is completed;
when the number of lasers contained in the laser grouping is confirmed to be one through a configuration process, the processor sends independent data contents to be sent to a first preset number of laser drivers corresponding to the first preset number of lasers, and optical signals carrying the corresponding data contents to be sent are modulated by the laser drivers in parallel through the first preset number of lasers.
8. The method for reporting optical power of an optical module according to claim 1, wherein the processor obtains an optical signal intensity of a second detector at a corresponding wavelength collected by a second optical module on a peer node, so as to determine a number of lasers to be established in a use process, which are operated at a same wavelength and are assigned to a same laser group, specifically:
after the processor acquires one or more parameters of the length of the optical fiber link between the processor and the second optical module on the opposite terminal node, the number of the repeaters and the number of the optical fiber fusion points, the processor correspondingly selects the matched number of lasers in the first round of test according to historical experience, sets the lasers to transmit with the same optical signal wavelength, and gives the respective laser drivers the same electrical signal test data content so as to drive the corresponding lasers to synchronously transmit the optical signals.
9. The method for reporting optical power of an optical module according to any one of claims 6 to 8, wherein the grouping of the lasers is performed in a manner of sequential from top to bottom; and the primary laser in each corresponding laser group is the laser with the smallest number in the group; or selecting the number of the corresponding lasers to meet the span of the corresponding preset stepping length according to the preset stepping length, and forming laser grouping by the matched number of lasers; while the main laser in each respective laser group is the centrally numbered laser within the respective group.
10. An optical power reporting device of an optical module, characterized in that the device comprises at least one processor and a memory communicatively connected with the at least one processor; wherein the memory stores instructions executable by the at least one processor for performing the optical power reporting method of the optical module of any one of claims 1-9.
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