CN102868439A - Control system for realizing multiplexing of pin of OLT (optical line terminal) optical module - Google Patents
Control system for realizing multiplexing of pin of OLT (optical line terminal) optical module Download PDFInfo
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- CN102868439A CN102868439A CN2012103623217A CN201210362321A CN102868439A CN 102868439 A CN102868439 A CN 102868439A CN 2012103623217 A CN2012103623217 A CN 2012103623217A CN 201210362321 A CN201210362321 A CN 201210362321A CN 102868439 A CN102868439 A CN 102868439A
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Abstract
The invention discloses a control system for achieving multiplexing of a pin of an OLT (optical line terminal) optical module. The control system comprises the OLT optical module and a system main board control unit, wherein the OLT optical module comprises a micro-controller; the system main board control unit and the micro-controller in the OLT optical module are in communication connection, and the multiplexing of an off (TX-Disable) signal of any pin of the OLT optical module and a strength trigger (RSSI-Trigger) signal of received light signal is achieved by changing high and low level states of a state indicating bit in the micro-controller. According to the system, the multiplexing of the off (TX-Disable) signal of any pin of the existing OLT optical module and the strength trigger (RSSI-Trigger) signal of received light signal is flexibly achieved, and flexible use of the optical module is enhanced.
Description
Technical field
The present invention relates to the optical communication technique field, be specifically related to a kind of control system of the OLT of realization optical module pin multiplexing.
Background technology
Ethernet passive optical network EPON is as a kind of mainstream technology of fixing access, this technology maturation, stable performance, progressively enters commercial application field on a large scale.The SFP optical module is the low profile thermal plug optical module that meets the MSA agreement, and the function of bidirectional data transfers is provided in optical communication system, and it has the characteristics such as transmission rate height, volume are little.The electric function of the pin of existing SFP optical module all defines, and can not change, and this has limited the flexible use of existing optical module.
Summary of the invention
The object of the invention is to overcome existing above-mentioned deficiency in the prior art, a kind of control system that changes the realization OLT optical module pin multiplexing of the electric function that has the optical module pin now is provided.
In order to realize the foregoing invention purpose, the invention provides following technical scheme:
A kind of control system that realizes OLT optical module pin multiplexing, comprise OLT optical module and system board control unit, described OLT optical module comprises microcontroller, micro-controller communications in described system board control unit and the OLT optical module is connected, realizes the multiplexing of laser shutdown (TX_Disable) signal of OLT optical module pin and receiving optical signals intensity triggering (RSSI_Trigger) signal by the high-low level state that changes the state indicating bit in the described microcontroller.
It is to utilize the system board control unit that the state indicating bit of register in the described microcontroller is controlled, switched and identifies to realize that described laser shutdown (TX_Disable) signal and receiving optical signals intensity trigger the multiplexing of (RSSI_Trigger) signal; Microcontroller in system board control unit and the optical module communicates.If this state indicating bit is set to low level by the system board control unit, i.e. it is the RSSI_Trigger signal that the signal of this pin is sent in expression now; If this state indicating bit is set to high level by the system board control unit, what namely this pin was sent in expression now is the TX_Disable signal.The present invention utilizes the system board control unit to realize that flexibly the laser shutdown of the arbitrary pin of OLT optical module (TX_Disable) signal and receiving optical signals intensity trigger the multiplexing of (RSSI_Trigger) signal, change the electric function of existing optical module pin, strengthened the flexible use of optical module.
Wherein, described OLT optical module also comprises 20 pin golden finger connectors, drive circuit for laser, light transmitting-receiving subassembly, LC interface and limiting amplifier; Described smooth transmitting-receiving subassembly comprises laser, avalanche photodide+burst mode trans-impedance amplifier assembly; Wherein, described drive circuit for laser, laser, LC interface, avalanche photodide+burst mode trans-impedance amplifier assembly, limiting amplifier connect successively; Described microcontroller, limiting amplifier are connected with described 20 pin golden finger connectors respectively; Described drive circuit for laser, limiting amplifier are connected with described microcontroller respectively.
According to embodiments of the invention, described microcontroller is connected with avalanche photodide by booster circuit, current mirror circuit successively, described current mirror circuit is successively by current amplification circuit, current sample-and-hold circuit be connected grade follow circuit and be connected with microcontroller, and described microcontroller is connected with current sample-and-hold circuit.
According to embodiments of the invention, described microcontroller provides the triggering signal input of avalanche photodide receiving optical signals intensity.
According to embodiments of the invention, described microcontroller provides the state control inputs of laser shutdown.
According to embodiments of the invention, described microcontroller provides optical module receiving end light signal strength indication output.
According to embodiments of the invention, described laser is Distributed Feedback Laser.
According to embodiments of the invention, the microcontroller in described system board control unit and the OLT optical module is connected by the IIC interface communication.
Compared with prior art, beneficial effect of the present invention:
The present invention realizes that the control system of OLT optical module pin multiplexing utilizes the system board control unit that the state indicating bit of register in the microcontroller in the OLT optical mode is controlled, switched and identifies, if this state indicating bit is set to low level by system board, i.e. it is the RSSI_Trigger signal that the signal of this complexing pin is sent in expression now; If this state indicating bit is set to high level by system board, what namely this complexing pin was sent in expression now is the TX_Disable signal, realize flexibly that by system's control arbitrary pin laser shutdown (TX_Disable) signal of optical module and receiving optical signals intensity trigger the multiplexing of (RSSI_Trigger) signal, change the electric function of existing optical module pin, strengthened the flexible use of optical module.
Description of drawings:
Fig. 1 is the control system block diagram that the present invention realizes OLT optical module pin multiplexing.
Fig. 2 is the circuit block diagram of monitoring the precision of receiving optical signals intensity among Fig. 1 in the OLT optical module.
Embodiment
The present invention is described in further detail below in conjunction with test example and embodiment.But this should be interpreted as that the scope of the above-mentioned theme of the present invention only limits to following embodiment, all technology that realizes based on content of the present invention all belong to scope of the present invention.
As depicted in figs. 1 and 2, the control system of realization OLT optical module pin multiplexing of the present invention, comprise OLT optical module and system board control unit, described OLT optical module comprises microcontroller, microcontroller in described system board control unit and the OLT optical module is connected by the IIC interface communication, realizes the multiplexing of laser shutdown (TX_Disable) signal of the arbitrary pin of OLT optical module and receiving optical signals intensity triggering (RSSI_Trigger) signal by the high-low level state that changes the state indicating bit in the described microcontroller.
It is to utilize the system board control unit that the state indicating bit of register in the described microcontroller is controlled, switched and identifies to realize that described laser shutdown (TX_Disable) signal and receiving optical signals intensity trigger the multiplexing of (RSSI_Trigger) signal; Microcontroller in system board control unit and the optical module communicates.If this state indicating bit is set to low level by the system board control unit, i.e. it is the RSSI_Trigger signal that the signal of this pin is sent in expression now; If this state indicating bit is set to high level by the system board control unit, what namely this pin was sent in expression now is the TX_Disable signal.Be the TX_Disable signal if send into the signal type of microcontroller, then the level state of this signal will be latched the device locking and keep, and also can latch this level state even the type of input signal has switched to the RSSI_Trigger signal.The level state that only has the type of input signal to switch to again the input of TX_Disable signal and input signal changes and just understands the level output state of tumble lock storage.If the output state of latch is high level, drive circuit for laser is exported to shutoff bias current and modulated current and the power supply of corresponding laser so.The present invention utilizes the system board control unit to realize that flexibly the laser shutdown of OLT optical module pin (TX_Disable) signal and receiving optical signals intensity trigger the multiplexing of (RSSI_Trigger) signal, change the electric function of existing optical module pin, strengthened the flexible use of optical module.
Concrete, described OLT optical module also comprises 20 pin golden finger connectors, drive circuit for laser, light transmitting-receiving subassembly, LC interface and limiting amplifier; Described smooth transmitting-receiving subassembly comprises laser, avalanche photodide APD+ burst mode trans-impedance amplifier assembly TIA; Wherein, described drive circuit for laser, laser, LC interface, avalanche photodide APD+ burst mode trans-impedance amplifier assembly TIA, limiting amplifier connect successively; Described microcontroller, limiting amplifier are connected with described 20 pin golden finger connectors respectively; Described drive circuit for laser, limiting amplifier are connected with described microcontroller respectively.Wherein said laser adopts Distributed Feedback Laser.Give respectively each functional circuit unit power supply from the power supply of this optical module golden finger connector input.Optical module of the present invention adopts standard C SFP encapsulation, and its golden finger is observed the golden finger definition of CSFP multi-source agreement (CSFP MSA Rev.2.0) regulation, and the definition of the golden finger of compatibility standard SFP.This optical module is prior art, and its operation principle process no longer describes in detail.
Optical module of the present invention is applied in the optical line terminal of gigabit ethernet passive optical network, belongs to the transmitted in both directions pattern of point-to-multipoint, and its receiving end is operated in the high-speed burst receiving mode.The light signal that every secondary burst receives all has different amplitudes usually, different bags is grown and different parlor distances.For the receiving optical signals intensity that guarantees monitoring has enough precision, in the optical module of the present invention, described microcontroller is connected with avalanche photodide APD by booster circuit, current mirror circuit successively, described current mirror circuit is successively by current amplification circuit, current sample-and-hold circuit be connected grade follow circuit and be connected with microcontroller, and described microcontroller is connected with current sample-and-hold circuit.Utilize current mirror circuit, the current signal of avalanche photodide APD output is realized the mirror image reduction according to fixed proportion, and amplify through current amplification circuit, the RSSI_Trigger signal that current sample-and-hold circuit utilizes system to send, burst image current different in size and that amplitude is different is converted into effective sampled voltage, analog digital conversion (DAC) port of microcontroller is converted to digital quantity with this sampled voltage, and according to the look-up table that optical module formed in the calibration debug phase, adopt the method for interpolation comparison to calculate receiving end light signal strength indication (RSSI) value that satisfies the monitoring precision.At present, the precision of burst mode RSSI monitoring can be controlled at normal temperature+/-1dB in.
Described microcontroller provides the triggering RSSI_Trigger signal input of avalanche photodide receiving optical signals intensity.Described microcontroller provides the state control inputs of laser shutdown (TX_Disable).Described microcontroller provides optical module receiving end light signal strength indication (RSSI) output.
Optical module of the present invention is abideed by the requirement of SFF-8472 and CSFP MSA agreement, the Output optical power of the Power supply voltage of microcontroller Real Time Monitoring optical module, module housing temperature, laser, the bias current of laser and burst receiving optical signals intensity, and corresponding alarm is provided.These are prior art, no longer describe in detail.
Claims (8)
1. control system that realizes OLT optical module pin multiplexing, comprise OLT optical module and system board control unit, described OLT optical module comprises microcontroller, it is characterized in that, micro-controller communications in described system board control unit and the OLT optical module is connected, and realizes the multiplexing of the TX_Disable signal of the arbitrary pin of OLT optical module and RSSI_Trigger signal by the high-low level state that changes the state indicating bit in the described microcontroller.
2. the control system of realization OLT optical module pin multiplexing according to claim 1 is characterized in that described OLT optical module also comprises 20 pin golden finger connectors, drive circuit for laser, light transmitting-receiving subassembly, LC interface and limiting amplifier; Described smooth transmitting-receiving subassembly comprises laser, avalanche photodide+burst mode trans-impedance amplifier assembly; Wherein, described drive circuit for laser, laser, LC interface, avalanche photodide+burst mode trans-impedance amplifier assembly, limiting amplifier connect successively; Described microcontroller, limiting amplifier are connected with described 20 pin golden finger connectors respectively; Described drive circuit for laser, limiting amplifier are connected with described microcontroller respectively.
3. the control system of realization according to claim 2 OLT optical module pin multiplexing, it is characterized in that, described microcontroller is connected with avalanche photodide by booster circuit, current mirror circuit successively, described current mirror circuit is successively by current amplification circuit, current sample-and-hold circuit be connected grade follow circuit and be connected with microcontroller, and described microcontroller is connected with current sample-and-hold circuit.
4. the control system of realization OLT optical module pin multiplexing according to claim 3 is characterized in that, described microcontroller provides the triggering signal input of avalanche photodide receiving optical signals intensity.
5. the control system of realization OLT optical module pin multiplexing according to claim 3 is characterized in that described microcontroller provides the state control inputs of laser shutdown.
6. the control system of realization OLT optical module pin multiplexing according to claim 3 is characterized in that, described microcontroller provides optical module receiving end light signal strength indication output.
7. according to claim 2 to the control system of 6 each described realization OLT optical module pin multiplexings, it is characterized in that described laser is Distributed Feedback Laser.
8. the control system of realization according to claim 1 OLT optical module pin multiplexing is characterized in that, the interior microcontroller of described system board control unit and OLT optical module is connected by the IIC interface communication.
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Cited By (9)
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| CN106407107A (en) * | 2016-08-31 | 2017-02-15 | 无锡市电子仪表工业有限公司 | Auxiliary software debugging method of universal type optical module |
| CN107171661A (en) * | 2017-05-18 | 2017-09-15 | 青岛海信宽带多媒体技术有限公司 | Pin multiplexing method and device, optical module and communication equipment |
| CN107332553A (en) * | 2017-07-24 | 2017-11-07 | 青岛海信宽带多媒体技术有限公司 | Method, device and the OLT optical modules of OLT optical module pin multiplexings |
| CN107465461A (en) * | 2017-08-03 | 2017-12-12 | 青岛海信宽带多媒体技术有限公司 | The control method of OLT optical modules and the control method and device of device and OLT |
| CN109067454A (en) * | 2018-06-29 | 2018-12-21 | 烽火通信科技股份有限公司 | A kind of method and system realized optical module and support pretection switch function |
| CN109120349A (en) * | 2018-10-31 | 2019-01-01 | 深圳市亚派光电器件有限公司 | Golden finger module reuse circuit and optical module |
| CN109116484A (en) * | 2018-10-31 | 2019-01-01 | 深圳市亚派光电器件有限公司 | Golden finger multiplex circuit and optical module |
| WO2019140740A1 (en) * | 2018-01-19 | 2019-07-25 | 厦门优迅高速芯片有限公司 | Circuit for multiplexing mon pin of optical receiver assembly for optical communication |
| CN112039582A (en) * | 2020-09-03 | 2020-12-04 | 南京捷澳德信息科技有限公司 | System and method for optical module expansion supporting optical communication link protection switching application |
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| CN106407107A (en) * | 2016-08-31 | 2017-02-15 | 无锡市电子仪表工业有限公司 | Auxiliary software debugging method of universal type optical module |
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| CN107332553A (en) * | 2017-07-24 | 2017-11-07 | 青岛海信宽带多媒体技术有限公司 | Method, device and the OLT optical modules of OLT optical module pin multiplexings |
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| WO2019140740A1 (en) * | 2018-01-19 | 2019-07-25 | 厦门优迅高速芯片有限公司 | Circuit for multiplexing mon pin of optical receiver assembly for optical communication |
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| CN109120349A (en) * | 2018-10-31 | 2019-01-01 | 深圳市亚派光电器件有限公司 | Golden finger module reuse circuit and optical module |
| CN109116484A (en) * | 2018-10-31 | 2019-01-01 | 深圳市亚派光电器件有限公司 | Golden finger multiplex circuit and optical module |
| CN109116484B (en) * | 2018-10-31 | 2024-04-19 | 深圳市亚派光电器件有限公司 | Golden finger multiplexing circuit and optical module |
| CN112039582A (en) * | 2020-09-03 | 2020-12-04 | 南京捷澳德信息科技有限公司 | System and method for optical module expansion supporting optical communication link protection switching application |
| CN112039582B (en) * | 2020-09-03 | 2022-04-01 | 南京捷澳德信息科技有限公司 | System and method for optical module expansion supporting optical communication link protection switching application |
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