CN102820930A - Light module transmit enable control method, control device and light module - Google Patents
Light module transmit enable control method, control device and light module Download PDFInfo
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- CN102820930A CN102820930A CN2012102586047A CN201210258604A CN102820930A CN 102820930 A CN102820930 A CN 102820930A CN 2012102586047 A CN2012102586047 A CN 2012102586047A CN 201210258604 A CN201210258604 A CN 201210258604A CN 102820930 A CN102820930 A CN 102820930A
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Abstract
The invention discloses a light module transmit enable control method, a control device and a light module. The process of the control method comprises the following steps: after electrifying, a transmit enable signal of a laser driver in the light module is set as invalid; then an external transmit enable control signal is detected in real time, the detected external transmit enable control signal is used as the transmit enable control signal of the light module and transferred to the laser driver when the laser driver of the light module is prepared to drive. By controlling the transmit enable control signal, the external transmit enable control signal can be received only when the laser driver is prepared to drive, and controls the normal lighting of the laser according to the signal state, so that the situation of mistakenly lighting of the laser generated when the laser driver is not prepared to drive is avoided, and the reliability and the stability of the light module are improved.
Description
Technical field
The present invention relates to the optical communication technique field, particularly, relate to the optical module in the optical communication network, more specifically, relate to the optical module emission and enable control method, control device and optical module.
Background technology
In recent years, along with the rapid expansion of optical communication industry, the integration of three networks of data communication, IP communication, voice communication is quickened, and the demand of optical module also grows with each passing day.
With SFP (Small Form-factor Pluggable, the hot-swappable optical module of miniaturization) optical module is example, and its laser driver has the emission Enable Pin, and externally the control of the enable signal of system board is made decision, and whether drive laser is luminous.Existing SFP optical module all is the implementations that adopt emission enable pin and the Enable Pin of laser driver on the system board directly to link to each other when using.Optical module for this connected mode; To enable the significant level signal is that low level is an example; If its laser driver inside does not have configurable register; When the original levels of the emission enable pin on system board is low level, draw, also can cause when optical module is unripe and make that laser driver drive laser mistake is luminous though laser driver inside has.Even the laser driver inside of part optical module is provided with configurable register; Also can there be following two kinds of situation and cause the laser mistake luminous: a kind of situation; If it is not to force to draw high that emission enables the initial condition that powers on of control register; But after powering on, just be high level; Emission enable pin initialization level on system board is that low level and this low level signal time of transferring to laser driver, emission enabled the level conversion time of control register early than laser driver, can cause laser driver externally under the control of enable signal the drive laser mistake luminous; Another kind of situation is in the layoutprocedure of register, if the emission enable signal is low level then also causes mistake luminous.The defective of bringing after mistake is luminous is: because laser does not also configure fully; The light signal luminous power that causes launching departs from normal range (NR); Eye pattern is undesired, and extinction ratio is unusual, and it is unusual correspondingly to cause bias current monitoring, emission optical power monitoring etc. to occur; Even also can cause receiving unit also to occur having influenced normal communication unusually.
Summary of the invention
The purpose of this invention is to provide a kind of optical module emission and enable control method and control device, the improper laser that causes misses luminous problem because of emission enables to control to solve optical module of the prior art.
For realizing the foregoing invention purpose, optical module emission provided by the invention enables control method and adopts following technical proposals to be achieved:
A kind of optical module emission enables control method; Power on the back earlier with the emission of laser driver in the optical module enable control signal be changed to invalid; Then; Detect in real time external emission and enable control signal, and perform to drive when preparing at the laser driver of optical module and the external emission that is detected is enabled control signal enable control signal as the emission of optical module and be forwarded to laser driver.
Aforesaid control method; For guaranteeing that emission enables the correct transmission of control signal; Detecting before external emission enables control signal, will to be used to detect the terminal arrangement that said external emission enables control signal earlier be input, will be used to transmit the terminal arrangement that external emission enables to control signal to said laser driver is output.
Further, consider that laser driver has different functions, for guaranteeing compatible design, preferably to be used to transmit the terminal arrangement that external emission enables to control signal to said laser driver be two-way I/O end with said.
It is that emission on the external system plate enables control end that aforesaid control method, said external emission enable control end.
Aforesaid control method is prepared if said laser driver performs to drive, and then stores detected said external emission and enables control signal, so that when laser driver performs the driving preparation, in time carry out the transmission that enables control signal.
Aforesaid control method, said laser driver perform to drive prepares to be meant that the internal register completion initial configuration or the laser driver of laser driver recover the initialization state.
For realizing aforementioned purpose of the present invention, optical module emission provided by the invention enables control device and adopts following technical proposals to be achieved:
A kind of optical module emission enables control device, comprising:
External emission enables the control signal processing unit, and it enables signal input end and enables control end with external emission and be connected, and it enables in control signal transmitted in both directions end and the optical module emission of laser driver and enables control end and be connected;
Laser driver condition judgement unit enables the control signal processing unit with external emission respectively and laser driver is connected, and is used to judge whether laser driver performs drive to prepare, and result of determination is transferred to external emission enables the control signal processing unit; And
Memory cell is used to store external emission and enables control signal.
It is that emission on the external system plate enables control end that aforesaid control device, said external emission enable control end.
Aforesaid control device, said external emission enable control signal processing unit, laser driver condition judgement unit and memory cell and can adopt the main control unit in the optical module to realize.
The present invention also provides a kind of optical module, and this optical module also includes above-mentioned described emission and enables control device except including laser driver.
Compared with prior art; Advantage of the present invention and good effect are: the present invention controls through emission is enabled control signal; It is invalid under initial condition, to force the emission of laser driver to enable control signal; Forbid that laser is luminous, only perform and could receive external emission when drive preparing and enable control signal and normally luminous according to signal condition control laser at laser driver, avoided laser driver not perform driving preparation and cause laser by mistake luminous caused emission reach the reception abnormal problem unusually; The mistake that efficiently solves in the optical module warm swap process is luminous, has improved the reliability and stability of optical module.
After advantages embodiment of the present invention, other characteristics of the present invention and advantage will become clearer.
Description of drawings
Fig. 1 is the flow chart that optical module emission of the present invention enables an embodiment of control method;
Fig. 2 is the structured flowchart that optical module emission of the present invention enables an embodiment of control device.
Embodiment
Below in conjunction with accompanying drawing and embodiment technical scheme of the present invention is done further detailed explanation.
At first, brief description mentality of designing of the present invention: during the optical module of prior art is used, all are the implementations that adopt emission enable pin and the Enable Pin of laser driver on the system board directly to link to each other.If the outside enable signal on the system board for enable useful signal, like low level signal; Will cause the Enable Pin of optical module laser driver in warm swap is low level, causes laser driver luminous with regard to the drive laser mistake before accomplishing configuration.For addressing this problem, the present invention proposes the scheme that the emission enable pin that changes on the system board and the Enable Pin of laser driver directly link to each other, and adopt both to connect, carry out the implementation of signal forwarding indirectly through the third party by means of the third party.Concrete implementation method and implement device can be respectively with reference to figure 1 and Fig. 2 and following descriptions to this two accompanying drawing.Please refer to Fig. 1, this Fig. 1 shows the flow chart that optical module emission of the present invention enables an embodiment of control method.
As shown in Figure 1, the present invention is following for the flow process that the luminous emission of adopting of solution optical module mistake enables control method:
Step 101: flow process begins.
Step 102: optical module powers on.
When after optical module powers on use or charged pulling up for the first time, inserting once more, power supply is the optical module power supply through filter circuit, and the optical module realization powers on and delays startup.
Step 103: in optical module powers on slow start-up course, will be used at first to detect that the detection terminal that said external emission enables control signal is configured to input, will be used to transmit the terminal arrangement that external emission enables to control signal to said laser driver is output.
Here, external emission enables control end and is generally a terminal on the system board, and this layoutprocedure can realize through the interlock circuit unit.Usually, for the optical module that adopts integrated chip, be to realize through its main control unit.The purpose of carrying out this step is that external emission is enabled the input signal of control signal as third party's (like main control unit) on the one hand, makes the third party only can receive the level state that external emission enables control signal; On the other hand, be with laser driver as third-party output receiving side signal, make the third party can the external emission that receive be enabled control signal and successfully be forwarded to laser driver.
In addition, that considers that laser driver has has a light leak measuring ability, and what have does not have this function, for the laser driver that does not have this function, needs the third party to assist to accomplish this function.For this reason, as preferred embodiment, be compatible different laser driver, will be used to transmit the terminal arrangement that external emission enables to control signal to said laser driver is two-way I/O end, realizes laser driver and third-party two-way communication.
Step 104: with the emission of laser driver enable control signal be changed to invalid.
Luminous for fear of laser mistake, at first the emission of laser driver is enabled control signal and be changed to invalidly, for example,, then be changed to high level if significant level is a low level, luminous to forbid the laser driver drive laser, avoid its drive laser mistake luminous.
Step 105: the initialization laser driver, detect external emission simultaneously and enable control signal.
Laser driver is carried out initialization, mainly is that the internal register to laser driver carries out initial configuration, perhaps makes it restore to the initialization state.This process generally is to be carried out after accomplishing self initialization by the master control unit of optical module again.In this process, also constantly detect external emission simultaneously and enable control signal.
Step 106: judge whether laser driver performs driving and prepare.If, execution in step 107; If not, go to step 105, continue laser driver is carried out initialization.
Here, laser driver performs to drive and prepares to be meant that the internal register completion initial configuration or the laser driver of laser driver recover the initialization state.
If laser driver does not perform to drive and prepares, can earlier detected external emission be enabled control signal and store.Do not change if external emission enables the level state of control signal, need not change signal stored, have only when externally signal changes and upgrade again.The benefit of doing like this is can perform at laser driver in time to carry out the transmission that enables control signal when drive preparing, so as signal in the valid period fast execution enable control accordingly.
Step 107: after laser driver performs the driving preparation, external emission is enabled control signal be forwarded to laser driver.
When the laser driver internal register is accomplished initial configuration or is recovered the initialization state; Show that laser driver performs driving and prepares; At this moment, the third party just can enable control signal to external emission and enables control signal and be forwarded to laser driver as the emission of optical module.If control signal is for enabling useful signal at this moment, then laser driver will produce drive current, and drive laser is normally luminous; If control signal is for enabling invalid signals at this moment, laser is not luminous.
Through above-mentioned control method; Can solve optical module does not get ready and the luminous problem of mistake at laser driver; Especially it is luminous to solve the mistake that optical module causes in the warm swap process on system board; Prevent the unusual of supervision and reportings such as bias current, emission luminous power, also can avoid the unusual of receiving unit simultaneously, made system board stable more and reliable.
Please refer to Fig. 2, this structured flowchart that enables an embodiment of control device for optical module emission of the present invention shown in Figure 2.
As shown in Figure 2, the control device of this embodiment includes external emission and enables control signal processing unit 231 and be attached thereto laser driver condition judgement unit 232 and the memory cell 233 that connects.
Wherein, External emission enables control signal processing unit 231 and has the signal input end of enabling b and signal transmitted in both directions end c; Its input b enables control end a with the external emission of the external system plate 22 that can provide external emission to enable control signal and is connected, and the emission of laser driver 21 enables control end d and is connected in its transmitted in both directions end c and the optical module.The part that provides external emission to enable control signal is not limited to external system plate 22, also can be that other can provide and can be by the structure that optical module received.
Laser driver condition judgement unit 232 is connected with laser driver 21 on the one hand; Be used to read the relevant state information of laser driver 21, also judge according to the information that reads whether laser driver 21 performs driving and prepare; Enable control signal processing unit 231 with external emission on the other hand and be connected, be used for that result of determination is transferred to external emission and enable control signal processing unit 231.
The external emission that external emission enables 22 outputs of control signal processing unit 231 detection external system plates enables control signal; And external emission is enabled control signal enable control signal and be forwarded to laser driver 21 through its transmitted in both directions end c as the emission of optical module knowing that laser driver 21 performs when drive preparing, make that laser driver 21 drive laser are luminous.External emission enables control signal processing unit 231 and also is connected with memory cell 233; If laser driver 21 is not got ready, external emission enables 231 of control signal processing units and the outside of being read is enabled control signal writes to storage in the memory cell 233.When laser driver 21 is got ready, can directly from this memory cell 233, read and enable control signal and be forwarded in the laser driver 21.
The optical module emission of this embodiment enables control device and enables control signal processing unit 231 as the third party through external emission is set; It is only direct-connected with this third party that external emission enables control end; And no longer directly be connected with laser driver 21; External emission enables control signal and controllably is forwarded to laser driver 21 through this third party, thus the generation of the mistake luminescence phenomenon that can effectively avoid causing in the optical module warm swap process.This control device course of work more specifically please refer to above-mentioned description to Fig. 1 control method.
External emission enables control signal processing unit 231, laser driver condition judgement unit 232 and memory cell 233 and can adopt construction unit independently of one another, that be arranged in the optical module separately to realize; Also can adopt the main control unit 23 in the optical module to realize; For example, employing realizes as the MCU microcontroller of main control unit.If the main control unit that directly integrates 23 is realized; Because main control unit 23 itself needs to accomplish the relevant initial work such as register configuration of laser driver 21; Self just can know whether laser driver 21 performs driving and prepare; So, judge with regard to the correlation behavior information that does not need to read laser driver 21 again.
Above embodiment is only in order to explaining technical scheme of the present invention, but not limits it; Although the present invention has been carried out detailed explanation with reference to previous embodiment, for the person of ordinary skill of the art, still can make amendment to the technical scheme that previous embodiment is put down in writing, perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of relevant art scheme break away from the spirit and the scope of the present invention's technical scheme required for protection.
Claims (10)
1. an optical module emission enables control method; It is characterized in that; Power on the back earlier with the emission of laser driver in the optical module enable control signal be changed to invalid; Detect external emission then in real time and enable control signal, and perform to drive when preparing at the laser driver of optical module and the external emission that is detected is enabled control signal enable control signal as the emission of optical module and be forwarded to laser driver.
2. control method according to claim 1; It is characterized in that; Detecting before external emission enables control signal, will to be used to detect the terminal arrangement that said external emission enables control signal earlier be input, will be used to transmit the terminal arrangement that external emission enables to control signal to said laser driver is output.
3. control method according to claim 2 is characterized in that, to be used to transmit the terminal arrangement that external emission enables to control signal to said laser driver be two-way I/O end with said.
4. control method according to claim 2 is characterized in that, it is that emission on the external system plate enables control end that said external emission enables control end.
5. control method according to claim 1 is characterized in that, does not prepare if said laser driver performs to drive, and then stores detected said external emission and enables control signal.
6. according to each described control method in the claim 1 to 5, it is characterized in that said laser driver performs to drive prepares to be meant that the internal register completion initial configuration or the laser driver of laser driver recover the initialization state.
7. an optical module emission enables control device, it is characterized in that said device comprises:
External emission enables the control signal processing unit, and it enables signal input end and enables control end with external emission and be connected, and it enables in control signal transmission ends and the optical module emission of laser driver and enables control end and be connected;
Laser driver condition judgement unit enables the control signal processing unit with external emission respectively and laser driver is connected, and is used to judge whether laser driver performs drive to prepare, and result of determination is transferred to external emission enables the control signal processing unit; And
Memory cell is used to store external emission and enables control signal.
8. control device according to claim 7 is characterized in that, it is that emission on the external system plate enables control end that said external emission enables control end.
9. according to claim 7 or 8 described control device, it is characterized in that said external emission enables control signal processing unit, laser driver condition judgement unit and memory cell and adopts the main control unit in the optical module to realize.
10. an optical module comprises laser driver, it is characterized in that, includes also that each described emission enables control device in the aforesaid right requirement 7 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102586047A CN102820930A (en) | 2012-07-25 | 2012-07-25 | Light module transmit enable control method, control device and light module |
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| CN2012102586047A CN102820930A (en) | 2012-07-25 | 2012-07-25 | Light module transmit enable control method, control device and light module |
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| CN110233702A (en) * | 2019-05-27 | 2019-09-13 | 深圳市迅特通信技术有限公司 | A kind of signal transmission method and optical mode block system based on optical module |
| CN115189760A (en) * | 2022-06-07 | 2022-10-14 | 阿里巴巴（中国）有限公司 | Optical module monitoring method, system and device |
| CN115826163A (en) * | 2023-02-16 | 2023-03-21 | 绍兴中科通信设备有限公司 | Circuit structure for preventing light leakage of SFP-DD optical module and optical module |
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Application publication date: 20121212 |