CN106375021A - Method for adjusting extinction ratio of optical module and optical module - Google Patents

Method for adjusting extinction ratio of optical module and optical module Download PDF

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Publication number
CN106375021A
CN106375021A CN201610703326.XA CN201610703326A CN106375021A CN 106375021 A CN106375021 A CN 106375021A CN 201610703326 A CN201610703326 A CN 201610703326A CN 106375021 A CN106375021 A CN 106375021A
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China
Prior art keywords
modulation
optical module
speed
current
look
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CN201610703326.XA
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CN106375021B (en
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王乐
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Hisense Broadband Multimedia Technology Co Ltd
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Hisense Broadband Multimedia Technology Co Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50Transmitters
    • H04B10/564Power control
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00Semiconductor lasers
    • H01S5/06Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/068Stabilisation of laser output parameters
    • H01S5/06808Stabilisation of laser output parameters by monitoring the electrical laser parameters, e.g. voltage or current
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00Semiconductor lasers
    • H01S5/06Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/068Stabilisation of laser output parameters
    • H01S5/0683Stabilisation of laser output parameters by monitoring the optical output parameters

Abstract

The invention discloses a method for adjusting the extinction ratio of an optical module. The method comprises the following steps: setting a modulation current lookup table corresponding to the working speed of the optical module in the optical module in advance, first acquiring the current working speed of the optical module according to the state of a designated interface of the optical module, and further determining a modulation current DAC value corresponding to the current working temperature of the optical module according to the modulation current lookup table after acquiring the modulation current lookup table corresponding to the working speed. Since the modulation current lookup table contains the corresponding relation between the working temperature and the modulation current DAC value, the optical module can meet the precision requirement while being switched between different working speeds after the DAC value is configured to a register corresponding to the laser driver in the optical module; therefore, an equipment manufacturer can use the optical module to perform network planning, business reengineering, and upgrading maintenance more flexibly and conveniently.

Description

A kind of method of adjustment optical module extinction ratio and optical module
Technical field
The present invention relates to technical field of photo communication, particularly to a kind of method of adjustment optical module extinction ratio, also relate to simultaneously And a kind of optical module.
Background technology
Optical module (optical module) is made up of opto-electronic device, functional circuit and optical interface etc., as switch, The carrier of transmission between the communication equipments such as router, optical module is used for executing photoelectric converting function, and with respect to transceiver more Tool efficiency, safety.Be provided with optical module transmitting terminal convert electrical signals into optical signal and transmitted by optical fiber after, setting The receiving terminal of optical module is converted into the signal of telecommunication optical signal again.
For the optical module belonging to polarizer, extinction ratio is to affect an important parameter of its precision, extinction ratio For laser instrument light power in logical one the ratio with mean power during logical zero.Because polarizer is not necessarily all preferable , therefore extinction ratio is to weigh the important parameter of polariser quality, and extinction ratio is bigger, and this polariser quality is higher.
In the prior art, the mode of operation of optical module is with rate representation, in order to adapt to different network environments and technology Index, can make it as far as possible being capable of compatible multiple operating rates, the such as optical mode of 1g/10g specification while manufacturer's design optical module Block represents this optical module and can switch between two kinds of speed of 1g and 10g.
During realizing the present invention, the representative value of the general extinction ratio of 10g optical module is 5db to inventor, Due to the excessive rear light eye pattern meeting serious deterioration of extinction ratio under two-forty, the therefore extinction ratio under 10g speed is difficult to more than 7db.But Meanwhile, the protocol requirement according to Ethernet 1000base-lx, if the operating rate of optical module is 1.25g, then its delustring Ratio requires as more than 9db.The application that therefore current 10g optical module is difficult to compatible 1000base-lx simultaneously in extinction ratio will Ask.
As can be seen here, how according to the current operating rate of optical module, the extinction ratio of this optical module to be adjusted, from And make optical mode adapt to different network environments requirement on the premise of ensureing optical module precision, become those skilled in the art urgently The technical problem solving.
Content of the invention
The invention discloses a kind of method of adjustment optical module extinction ratio, optical module can be made to protect under multiple operating rates The card demand to extinction ratio for the optical module, optical module meets required precision while can switching between different operating speed, should Method is applied in the optical module support multiple operating rates, and described optical module also comprises multiple modulation current look-up table, each institute State modulation ammeter corresponding with described operating rate, the method comprises the following steps:
The state of the specified interface according to described optical module obtains the current operating rate of described optical module;
Obtain modulation current look-up table corresponding with described operating rate;
The operating temperature corresponding modulation electric current dac current with described optical module is determined according to described modulation current look-up table Value, described modulation current look-up table comprises the corresponding relation of described operating temperature and described modulation electric current dac value;
Drive the laser instrument of described optical module using described modulation electric current dac value.
Accordingly, the invention allows for a kind of optical module, this optical module multiple operating rates of support, described optical module is also Comprise multiple modulation current look-up table, each described modulation ammeter is corresponding with described operating rate, and this optical module includes:
First acquisition module, the state of the specified interface according to described optical module obtains the current work speed of described optical module Rate;
Second acquisition module, obtains modulation current look-up table corresponding with described operating rate;
Determining module, determines the operating temperature corresponding tune current with described optical module according to described modulation current look-up table Electric current dac value processed, described modulation current look-up table comprises the corresponding relation of described operating temperature and described modulation electric current dac value;
Drive module, drives the laser instrument of described optical module using described modulation electric current dac value.
By applying the above technical scheme of the application, in optical module, setting is corresponding with the operating rate of optical module in advance Modulation current look-up table, the first state of the specified interface according to optical module obtain the current operating rate of optical module, and are obtaining Determined current with optical module after taking modulation current look-up table corresponding with operating rate further according to modulation current look-up table Operating temperature corresponding modulation electric current dac value, because modulation current look-up table comprises operating temperature and modulates the right of electric current dac value Should be related to, therefore after depositor corresponding with laser driver in by the configuration of dac value to optical module, optical module can be in difference Between operating rate switch while meet required precision, make equipment vendor using optical module carry out the network planning, business reorganization, More flexible and convenient during upgrade maintenance.
Brief description
A kind of schematic flow sheet of the method for adjustment optical module extinction ratio that Fig. 1 proposes for the application;
Fig. 2 is the schematic flow sheet of a kind of method of adjustment optical module extinction ratio proposing in the application specific embodiment;
Fig. 3 is the schematic flow sheet of a kind of method of adjustment optical module extinction ratio proposing in the application specific embodiment;
Fig. 4 is a kind of structural representation of the optical module proposing in the application specific embodiment;
Fig. 5 is a kind of structural representation of the optical module proposing in the embodiment of the present application.
Specific embodiment
As described in the background art, in the optical module supporting different operating speed, the delustring of optical module under different rates The difference of the difference of ratio and temperature all can impact to the service behaviour of optical module, on the one hand, when optical module is different Under operating rate, to the demand gap of the extinction ratio of optical module, also ratio is larger, is operated in it is impossible to meet simultaneously in the prior art The demand of the extinction ratio of the optical module under different rates, on the other hand, optical module operationally can produce the change of optical mode deblocking temperature Change, operationally temperature also can be variant for the optical module under different rates, the difference of temperature can lead to circuit element parameter to change, When optical module mode of operation changes, need according to temperature, optical module to be adjusted.Therefore, cut in optical module in prior art During throw-over rate, the temperature change of optical module affects the change of extinction ratio, and is operated in the optical module extinction ratio under different bandwidth Difference is larger.
In order to solve the above problems, the application proposes a kind of method of adjustment optical module extinction ratio, is implementing the method Before flow process, need the operating rate corresponding modulating current look-up table of setting and optical module in optical module in advance, this modulation electricity Stream look-up table comprises the corresponding relation of operating temperature and modulation electric current dac value, to ensure the extinction ratio of optical module with temperature change Change and in change, electric current configuration is modulated accordingly to the laser depositor of optical module, modulation current look-up table is optical module Current temperature and the mapping table modulating electric current dac value, and on the other hand in the optical module supporting different operating speed, Because the extinction ratio of optical module demand at the high velocities is relatively low, and the optical module under low rate needs higher extinction ratio, work Make the optical module delustring optical module that when luminous power etc. is compared under two-forty at low velocity, there is larger difference, therefore, Work optical module at the high velocities compares work optical module at low velocity needs the modulation current look-up table of different accuracy, The storage center in optical module is needed to set up operating rates multiple with optical module corresponding modulation current look-up table respectively, thus full Sufficient optical module demand to extinction ratio under different operating speed.
As shown in Figure 1, be the application propose a kind of method of adjustment optical module extinction ratio schematic flow sheet, the party Method specifically comprises the following steps that
Step 101, the state according to optical module specified interface obtains the current operating rate of optical module.
User, according to the demand of itself, has different requirements to the operating rate of optical module, by ambient systems (for example Pc machine, software and other hardware etc.) to select the operating rate of the optical module of needs to sending instructions under optical module, optical module connects Receive the instruction that outer bound pair optical module issues, in this instruction, include the configuration signal to speed switching interface.
In specific application scenarios, the configuration signal to speed switching interface that optical module reception system issues, mainly There are following two steps:
A) the hardware speed switching interface signal of system transmission in optical module, is obtained by the golden finger in optical module, According to the curent change of the hardware pins in golden finger, carry out the configuration signal of direct access systems transmission;
B) optical module obtains the configuration of systems versus software speed switching interface by data/address bus i2c, to judge that system will Seek the rate mode of optical module work, when the emission port in its medium-rate switching interface is to put 1, optical module is operated in high bandwidth Pattern, when the emission port in its medium-rate switching interface is to set to 0, optical module is operated in low bandwidth model.
In specific application scenarios, when optical module starts, optical module is set by the microcontroller mcu of optical module automatically Work under flank speed, it is to avoid when optical module starts, the fault such as the too small network blockage causing of speed and Network Packet Loss is produced Raw, automatically work under flank speed when optical module is set as and starting, then according to user need be adjusted again.
Mcu obtains the hardware speed switching interface signal of system transmission by the golden finger in optical module, is connect according to i2c The configuration of the systems versus software speed switching interface receiving, to judge the speed of optical module work.
In specific application scenarios, when the receiving port of speed switching interface puts 1, optical module receiving terminal is operated in height Rate mode, when the receiving port of speed switching interface sets to 0, optical module receiving terminal is operated under low rate mode.Work as speed When the emission port of switching interface puts 1, optical module transmitting terminal is operated in high-rate mode, when the emission port of speed switching interface When setting to 0, optical module transmitting terminal is operated under low rate mode.
Step 102, obtains modulation current look-up table corresponding with optical module operating rate;
In the preferred embodiment of the application, for optical module different operating speed set up respectively corresponding with operating rate Modulation current look-up table, and multiple independent modulation current look-up table to take the larger storage of optical module microcontroller empty Between, in the preferred embodiment of the application, the modulation electric current employing different accuracy in the optical module supporting different rates is looked into Look for table, and at low velocity using modulation current compensation method, save the memory space of optical module microcontroller mcu.
Specifically, according to optical module the extinction ratio under different operating speed difference, and optical module memory space Size, specifically have following two set up modulation current look-up table modes:
1) formulate the modulation current look-up table of at least two different accuracies in the memory space of microcontroller mcu, respectively For the first modulation current look-up table and the second modulation current look-up table, the first corresponding modulation under optical module high-rate mode Current look-up table, the second corresponding modulation current look-up table under optical module low rate mode.
2) formulate the modulation current look-up table of at least two different accuracies in the memory space of microcontroller mcu, respectively Modulate current look-up table and modulation electric current low-speed compensation value temperature lookup table for first, corresponding under optical module high-rate mode The first modulation current look-up table, modulation electric current low-speed compensation value temperature lookup table corresponding under optical module low rate mode, Wherein, the precision of the first modulation current look-up table is higher than modulation electric current low-speed compensation value temperature lookup table;It is in low in optical module When under rate conditions, need simultaneously using lookup first modulation current look-up table and lookup modulation electric current low-speed compensation value temperature The mode of look-up table to be configured in the laser instrument of optical module to obtain corresponding modulation electric current dac value.
It should be noted that the optical module in the application supports multiple operating rates, accordingly, there is also multiple different essences The modulation current look-up table of degree, but the different rates categorical measure that wherein optical module is supported can be with modulation ammeter quantity pair , in the case that those skilled in the art do not make inventive improvements optical module should supported not it is also possible to not correspond to The quantity of the modulation ammeter of same rate categorical measure and different accuracy make improved, will not be to the protection domain of the application Impact.
For the difference of the modulation current look-up table of the optical module under different operating speed in above description, specially following Two kinds of situations:
1) when optical module is under high-rate mode, search first modulation current look-up table corresponding with two-forty;
2) when optical module is under low rate mode, obtain second modulation current look-up table corresponding with low rate;Or, Search modulation electric current low-speed compensation value temperature lookup table corresponding with optical module low rate mode.
Step 103, determines the operating temperature corresponding modulation electric current dac current with optical module according to modulation current look-up table Value;
When optical module is under high-rate mode, the work current with optical module is determined according to the first modulation current look-up table Make temperature corresponding dac value;
When optical module is under low-speed mode, according to corresponding two kinds different modulation current look-up table under low rate, It is specifically divided into following two situations:
1) if described current look-up table is the second modulation current look-up table, determined and light according to the second modulation current look-up table The current operating temperature of module corresponding dac value;
2) if described current look-up table is modulation electric current low-speed compensation value temperature lookup table, according to the first modulation current lookup Table determines the operating temperature corresponding initial modulation electric current dac value current with optical module, in modulation electric current vulgar offset temperature Obtain in look-up table corresponding with the current operating temperature of optical module is adjusted to current offset values, by initial modulation electric current dac value and Modulation current offset values sum is as described modulation electric current dac value.
Step 104, drives the laser instrument of optical module using dac value;
In specific application scenarios, the modulation getting electric current dac value is configured to optical module laser instrument by this step In corresponding registers, so that the extinction ratio of optical module reaches the requirement to extinction ratio for the optical module under work at present speed.
Method by applying a kind of adjustment optical module extinction ratio disclosed by the invention, setting and light in optical module in advance It is current that the state of the operating rate corresponding modulating current look-up table of module, the first specified interface according to optical module obtains optical module Operating rate, and obtain corresponding with operating rate modulation current look-up table after further according to modulate current look-up table true The fixed operating temperature current with optical module corresponding modulation electric current dac value, due to modulate current look-up table comprise operating temperature and The corresponding relation of modulation electric current dac value, depositor corresponding with laser driver therefore in by the configuration of dac value to optical module Afterwards, optical module meets required precision while can switching between different operating speed, so that equipment vendor is being entered using optical module More flexible and convenient when the row network planning, business reorganization, upgrade maintenance.
In order to the technological thought of the present invention is expanded on further, in conjunction with specific application scenarios, the technical side to the present invention Case illustrates.
It should be noted that in the specific embodiment of the invention, to support the light of the function of two kinds of speed switchings of 1g/10g Module illustrates, and the wavelength of this optical module is 1310nm, and those skilled in the art should learn, wherein optical module is operated in Be equivalent to the application during 10g speed to be operated under high-rate mode, optical module is operated in and is equivalent in the embodiment of the present application during 1g Optical module is operated under low rate mode, the specific embodiment of the present invention, includes but is not limited to this specific embodiment, including The speed of optical module support and wavelength etc., broadly fall within the protection domain of the application.
In practical application scene, taking optical module of the prior art as a example, general 10g optical module, its extinction ratio Representative value is 5db, due under two-forty the excessive rear light eye pattern of extinction ratio can serious deterioration, the therefore delustring under 10g speed Ratio is difficult to more than 7db, and the protocol requirement according to Ethernet 1000base-lx, the extinction ratio of 1.25g speed require for 9db with On.The function of two kinds of speed switchings of the 1g/10g of this optical module is rs0/rs1 two according to specified in optical module standard agreement Interface is realizing.Comprise hardware pins and software interface.When rs0 puts 1, optical module receiving terminal is operated in 10g pattern, when When rs0 sets to 0, optical module receiving terminal is operated under 1.25g speed.When rs1 puts 1, optical module transmitting terminal is operated in 10g pattern, When rs1 sets to 0, optical module transmitting terminal is operated under 1.25g speed.
The flow chart of the technical scheme of this specific embodiment is as shown in figure 3, specifically include following steps:
Step 201, formulates the modulation current look-up table of different accuracy according to optical module different bandwidth speed.
In order to ensure the stationarity that extinction ratio varies with temperature, optical module under 10g pattern, it is 2 DEG C one using precision The high accuracy look-up table of individual dac value covers -40~126 DEG C of temperature range, and this temperature range is the operating temperature of this optical module, Such a table needs to take the memory space of 84bytes.Just if all by the way of independent lookup tables under two kinds of speed, It is accomplished by taking the memory space of 168bytes.If adopting high rate modulation electric current dac value to add the tune of low rate under low rate The mode of electric current dac offset processed, then the modulation current offset values lookup with setting up 8 DEG C of dac values for lower of the low rate Table just can meet requirement, and such a look-up table only needs to the memory space of 22bytes, thus, it is possible to know, according to optical mode The modulation current look-up table that the different rates of block set up different accuracy can save the memory space of optical module.
Therefore, the memory space of the microcontroller mcu of optical module is set up two modulation current look-up table, the first modulation electricity Stream searches the high accuracy that meter accuracy is 2 DEG C of dac values, and look-up table covers -40~126 DEG C of temperature range;Second modulation electricity Stream look-up table covers -40~126 DEG C of temperature range using the high accuracy look-up table that precision is 2 DEG C of dac values;Or in light Two modulation current look-up table are set up, the first modulation current lookup meter accuracy is 2 in the memory space of microcontroller mcu of module The high accuracy of a DEG C dac value, look-up table covers -40~126 DEG C of temperature range, and modulation current offset values look-up table is 8 DEG C The precision of one dac value, the first modulation current lookup meter accuracy is more than modulation current offset values look-up table.
Step 202, when optical module starts, speed is set under flank speed mode of operation.
Automatically rs1 can be put 1 during this optical module electrifying startup, make optical module be operated in high bandwidth mode, the connecing of optical module Receiving end and transmitting terminal are all operated in 10g pattern so that module acquiescence in upper electricity is operated in 10g pattern.
Step 203, optical module receives the extraneous configuration signal to speed port switching rs0/rs1;
Mcu (microcontroller) obtains, by the golden finger of optical module, the hardware rs0/rs1 signal that system gives, and passes through simultaneously I2c obtains the configuration of systems versus software rs0/rs1.To judge that system requirements module is operated at a high speed or low speed, rs0 carries out phase Set to 0 or put 1 with answering.
In the application specific embodiment, the rs0/rs1 signal that given according to ambient systems, specifically there are the following two kinds feelings Condition:
(1) when the receiving port rs0 of speed switching interface is to put 1;
(2) when the receiving port rs0 of speed switching interface is to set to 0.
The above-mentioned steps of the embodiment of both of these case are all the same, below according to different situations, corresponding embodiment entered Row explanation, the step that specific examples below is is the embodiment of the present application when putting 1 when the speed port switching of optical module:
Step 204, rs1 puts 1, obtains corresponding modulation electric current dac value according in modulation current temperature look-up table;
When rs0 puts 1, rs0 is put 1, mcu accordingly can be according to Current Temperatures in modulation the first current temperature look-up table In find corresponding modulation electric current dac value,.
Step 205, the dac value of the corresponding Current Temperatures obtaining is configured in the corresponding registers of laser driver to protect Demonstrate,prove its extinction ratio and be more than the extinction ratio threshold value corresponding to present rate.In the application specific embodiment, dac value is configured to phase Answer to ensure this optical module under 10g speed in depositor, its extinction ratio is more than 3.5db.
And in the another specific embodiment of the application, when the receiving port of speed switching interface sets to 0, this optical module work Make under low rate mode, simple lookup high-precision modulation electric current table search dac value, it is configured to posting of optical module laser instrument In storage, by less than the extinction ratio required by this speed, the application specific embodiment step is concrete with above-mentioned for the extinction ratio drawing The previous step of embodiment is all identical, repeats no more again, is only to put the application when 1 to implement to the speed port switching of optical module The step of example is introduced, and as shown in Figure 3, is a kind of optical module rate switching method that the application specific embodiment proposes Schematic flow sheet, specifically comprises the following steps that
Step 304, rs1 sets to 0, and obtains corresponding modulation electric current dac value according in modulation current temperature look-up table;
When rs1 sets to 0, rs0 is set to 0 accordingly, and mcu can look in the first modulation current temperature according to Current Temperatures first Look for and in table, find corresponding modulation electric current dac1 value, in the second modulation current look-up table, then determine corresponding modulation electricity Stream offset dac2 value, the modulation electric current dac2 offset that high rate modulation electric current dac1 value is added low rate determines modulation Electric current dac value.
Step 305, the dac value of the corresponding Current Temperatures obtaining is configured in the corresponding registers of laser driver to protect Demonstrate,prove its extinction ratio and be more than the extinction ratio threshold value corresponding to present rate.
In this specific embodiment, the dac obtaining value is configured in the corresponding registers of laser driver, obtains Under 1.25g speed, the extinction ratio of optical module is more than the extinction ratio of optical module under 10g speed it is ensured that optical module under 1.25g speed Extinction ratio is more than 9db.
Method by applying a kind of adjustment optical module extinction ratio of the application proposition, optical module can be in different operating speed Meet required precision while switching between rate, make equipment vendor carry out the network planning, business reorganization, upgrading dimension using optical module More flexible and convenient during shield, further, look into modulation electric current low-speed compensation value temperature is arranged at low velocity by optical module Look for table, because the precision of modulation electric current low-speed compensation value temperature lookup table is less than optical module speed corresponding modulation current lookup Table is it is possible to effectively save the space of optical module.
As a example optical module organigram shown in by Fig. 4, in the specific embodiment of the application, first against optical module The different extinction ratios of the different rates supported, are prefixed the modulation current look-up table of different accuracy.Arrive when optical module mcu receives During the configuration signal of the rs0/rs1 sending from ambient systems, it is right to be obtained according to current temperature lookup modulation current look-up table The modulation current value dac answering, dac value is configured in the corresponding registers of laser driver, to ensure that extinction ratio meets this speed Requirement threshold value under rate.Specifically, comprise the steps:
A) optical module on startup speed is set under flank speed mode of operation;
B) optical module receives the extraneous configuration signal to speed port switching rs0/rs1;
C) the band register configuration of limiting amplifier is corresponding bandwidth mode by mcu;
D) find corresponding modulation electric current dac value according to Current Temperatures in modulation current temperature look-up table;
E) corresponding dac value is configured in the corresponding registers of laser driver.
Above-mentioned scene is used in the optical module supporting various bandwidth speed, by a kind of adjustment light applying the application to propose The method of module extinction ratio, can be accurately to the optical module under different rates, according to the temperature value inquiry under current luminous power Modulation current look-up table obtains corresponding modulation current value, is configured in the corresponding registers of laser driver, to ensure delustring Good working state than the stationarity varying with temperature and optical module.
Accordingly, as shown in figure 5, the application also proposed a kind of optical module, this optical module supports multiple operating rates, institute State optical module and also comprise multiple modulation current look-up table, each described modulation ammeter is corresponding with described operating rate, this optical module Including:
First acquisition module 51, the state of the specified interface according to described optical module obtains the current work of described optical module Speed;
Second acquisition module 52, obtains modulation current look-up table corresponding with described operating rate;
According to described modulation current look-up table, determining module 53, determines that the operating temperature current with described optical module is corresponding Modulation electric current dac value, described modulation current look-up table comprises the corresponding pass of described operating temperature and described modulation electric current dac value System;
Drive module 54, drives the laser instrument of described optical module using described modulation electric current dac value.
In specific application scenarios, described operating rate comprises high speed operation speed and tick-over speed, described First acquisition module 51 specifically for:
If the current operating rate of described optical module be high speed operation speed, described modulation current look-up table in obtain with Described high speed operation speed corresponding first modulates current look-up table;
If the current operating rate of described optical module is tick-over speed, obtains in described modulation current look-up table and adjust Electric current low-speed compensation value temperature lookup table processed and first modulation current look-up table corresponding with described high speed operation speed;Or, Second modulation current look-up table corresponding with described tick-over speed is obtained in described modulation current look-up table.
In specific application scenarios, described determining module 53 specifically for:
If described modulation current look-up table is described first modulation current look-up table, modulate current look-up table described first Middle obtain corresponding with described operating temperature described modulate electric current dac value;
If described modulation current look-up table comprises described first modulation current look-up table and described modulation electric current low speed is mended Repay value temperature lookup table, in the described first modulation current look-up table, obtain initial modulation electric current corresponding with described operating temperature Dac value, obtains modulation electric current corresponding with described operating temperature in described modulation electric current low-speed compensation value temperature lookup table and mends Repay value, and described initial modulation electric current dac value is modulated electric current dac value with described modulation current offset values sum as described;
If described modulation current look-up table is described second modulation current look-up table, modulate current look-up table described second Middle obtain corresponding with described operating temperature described modulate electric current dac value.
In specific application scenarios, described specified interface is specially rs1 interface, and described first acquisition module 51 is specifically used In:
Obtain hardware signal and the software configuration information being issued to described rs1 interface;
If determining that described rs1 interface puts 1 according to described hardware signal and described software configuration information, confirm described work Pattern is described high speed operation speed;
If determining that described rs1 interface sets to 0 according to described hardware signal and described software configuration information, confirm described work Pattern is described tick-over speed.
In specific application scenarios, the precision of described first modulation current look-up table is more than described modulation electric current low speed and mends Repay value temperature lookup table.
By applying a kind of optical module disclosed by the invention, the operating rate pair with optical module is set in advance in optical module Current look-up table should be modulated, the state of the specified interface according to optical module first obtains the current operating rate of optical module, and Determined current with optical module after obtaining modulation current look-up table corresponding with operating rate further according to modulation current look-up table Operating temperature corresponding modulation electric current dac value, because modulation current look-up table comprises operating temperature and modulates electric current dac value After corresponding relation, therefore depositor corresponding with laser driver in by the configuration of dac value to optical module, optical module can be not Meet required precision with while switching between operating rate, make equipment vendor carry out the network planning, business weight using optical module More flexible and convenient when group, upgrade maintenance.
Through the above description of the embodiments, those skilled in the art can be understood that the present invention can be led to Cross hardware to realize it is also possible to the mode by software plus necessary general hardware platform to be realized.Based on such understanding, this Bright technical scheme can be embodied in the form of software product, and this software product can be stored in non-volatile memories Medium (can be cd-rom, u disk, portable hard drive etc.) in, including some instructions with so that a computer equipment (can be Personal computer, server, or network equipment etc.) execution each implement scene of the present invention described in method.
It will be appreciated by those skilled in the art that accompanying drawing is a schematic diagram being preferable to carry out scene, the module in accompanying drawing or Flow process is not necessarily implemented necessary to the present invention.
It will be appreciated by those skilled in the art that module in device in implement scene can according to implement scene describe into Row is distributed in the device of implement scene it is also possible to carry out one or more dresses that respective change is disposed other than this implement scene In putting.The module of above-mentioned implement scene can merge into a module it is also possible to be further split into multiple submodule.
The invention described above sequence number is for illustration only, does not represent the quality of implement scene.
Only the several of the present invention disclosed above are embodied as scene, but, the present invention is not limited to this, Ren Heben What the technical staff in field can think change all should fall into protection scope of the present invention.

Claims (10)

1. a kind of adjustment optical module extinction ratio method, be applied in the optical module support multiple operating rates it is characterised in that Described optical module also comprises multiple modulation current look-up table, and each described modulation ammeter is corresponding with described operating rate, the method Including:
The state of the specified interface according to described optical module obtains the current operating rate of described optical module;
Obtain modulation current look-up table corresponding with described operating rate;
The operating temperature current with described optical module corresponding modulation electric current dac value is determined according to described modulation current look-up table, Described modulation current look-up table comprises the corresponding relation of described operating temperature and described modulation electric current dac value;
Drive the laser instrument of described optical module using described modulation electric current dac value.
2. the method for claim 1 is it is characterised in that described operating rate comprises high speed operation speed and low speed work Make speed, obtain modulation current look-up table corresponding with described operating rate, particularly as follows:
If the current operating rate of described optical module be high speed operation speed, described modulation current look-up table in obtain with described The corresponding first modulation current look-up table of high speed operation speed;
If the current operating rate of described optical module is tick-over speed, in described modulation current look-up table, obtain modulation electricity Stream low-speed compensation value temperature lookup table and first modulation current look-up table corresponding with described high speed operation speed;Or, institute State and in modulation current look-up table, obtain second modulation current look-up table corresponding with described tick-over speed.
3. method as claimed in claim 2 is it is characterised in that determine and described optical module according to described modulation current look-up table Current operating temperature corresponding modulation electric current dac value, particularly as follows:
If described modulation current look-up table is described first modulation current look-up table, obtain in the described first modulation current look-up table Take described modulation electric current dac value corresponding with described operating temperature;
If described modulation current look-up table comprises described first modulation current look-up table and described modulation electric current low-speed compensation value Temperature lookup table, obtains initial modulation electric current dac corresponding with described operating temperature in the described first modulation current look-up table Value, obtains modulation current compensation corresponding with described operating temperature in described modulation electric current low-speed compensation value temperature lookup table Value, and described initial modulation electric current dac value is modulated electric current dac value with described modulation current offset values sum as described;
If described modulation current look-up table is described second modulation current look-up table, obtain in the described second modulation current look-up table Take described modulation electric current dac value corresponding with described operating temperature.
4. the method as described in any one of Claims 2 or 3 is it is characterised in that described specified interface is specially rs1 interface, root Obtain the current operating rate of described optical module according to the state of the specified interface of described optical module, particularly as follows:
Obtain hardware signal and the software configuration information being issued to described rs1 interface;
If determining that described rs1 interface puts 1 according to described hardware signal and described software configuration information, confirm described mode of operation For described high speed operation speed;
If determining that described rs1 interface sets to 0 according to described hardware signal and described software configuration information, confirm described mode of operation For described tick-over speed.
5. method as claimed in claim 4 it is characterised in that
The precision of described first modulation current look-up table is more than described modulation electric current low-speed compensation value temperature lookup table.
6. a kind of optical module, this optical module supports multiple operating rates it is characterised in that described optical module also comprises multiple modulation Current look-up table, each described modulation ammeter is corresponding with described operating rate, and this optical module includes:
First acquisition module, the state of the specified interface according to described optical module obtains the current operating rate of described optical module;
Second acquisition module, obtains modulation current look-up table corresponding with described operating rate;
Determining module, determines the operating temperature current with described optical module corresponding modulation electricity according to described modulation current look-up table Stream dac value, described modulation current look-up table comprises the corresponding relation of described operating temperature and described modulation electric current dac value;
Drive module, drives the laser instrument of described optical module using described modulation electric current dac value.
7. optical module as claimed in claim 6 is it is characterised in that described operating rate comprises high speed operation speed and low speed Operating rate, described first acquisition module specifically for:
If the current operating rate of described optical module be high speed operation speed, described modulation current look-up table in obtain with described The corresponding first modulation current look-up table of high speed operation speed;
If the current operating rate of described optical module is tick-over speed, in described modulation current look-up table, obtain modulation electricity Stream low-speed compensation value temperature lookup table and first modulation current look-up table corresponding with described high speed operation speed;Or, institute State and in modulation current look-up table, obtain second modulation current look-up table corresponding with described tick-over speed.
8. optical module as claimed in claim 7 it is characterised in that described determining module specifically for:
If described modulation current look-up table is described first modulation current look-up table, obtain in the described first modulation current look-up table Take described modulation electric current dac value corresponding with described operating temperature;
If described modulation current look-up table comprises described first modulation current look-up table and described modulation electric current low-speed compensation value Temperature lookup table, obtains initial modulation electric current dac corresponding with described operating temperature in the described first modulation current look-up table Value, obtains modulation current compensation corresponding with described operating temperature in described modulation electric current low-speed compensation value temperature lookup table Value, and described initial modulation electric current dac value is modulated electric current dac value with described modulation current offset values sum as described;
If described modulation current look-up table is described second modulation current look-up table, obtain in the described second modulation current look-up table Take described modulation electric current dac value corresponding with described operating temperature.
9. the optical module as described in claim 7 or 8 any one it is characterised in that described specified interface be specially rs1 interface, Described first acquisition module specifically for:
Obtain hardware signal and the software configuration information being issued to described rs1 interface;
If determining that described rs1 interface puts 1 according to described hardware signal and described software configuration information, confirm described mode of operation For described high speed operation speed;
If determining that described rs1 interface sets to 0 according to described hardware signal and described software configuration information, confirm described mode of operation For described tick-over speed.
10. optical module as claimed in claim 9 it is characterised in that
The precision of described first modulation current look-up table is more than described modulation electric current low-speed compensation value temperature lookup table.
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