CN102916739A - Real-time loop-back control system for optical module - Google Patents
Real-time loop-back control system for optical module Download PDFInfo
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- CN102916739A CN102916739A CN201210426922XA CN201210426922A CN102916739A CN 102916739 A CN102916739 A CN 102916739A CN 201210426922X A CN201210426922X A CN 201210426922XA CN 201210426922 A CN201210426922 A CN 201210426922A CN 102916739 A CN102916739 A CN 102916739A
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Abstract
The invention discloses a real-time loop-back control system for an optical module, belonging to the field of optical fiber communications. The system comprises a programmable switch array which can be used for connecting or disconnecting an optical module sending path and an optical module receiving path, wherein the programmable switch array is arranged between a laser driver and a sender in the optical module sending path and between a post amplifier and a receiver in the optical module receiving path; the programmable switch array is connected with a host machine by a communication interface; and the host machine controls the connection or disconnection of the programmable switch array in real time by the communication interface. According to the real-time loop-back control system for the optical module, during fault detection, the host machine can control the connection or disconnection of the switch array in real time by the communication interface, so that the loop-back real-time control is achieved; and a fault position can be real-timely located, so that the performances of the optical module during use is effectively guaranteed.
Description
Technical field
The present invention relates to fiber optic communication field, particularly the real-time loopback control system of a kind of optical module.
Background technology
Optical module is comprised of opto-electronic device, functional circuit and optical interface etc., and opto-electronic device comprises radiating portion and receiving unit.Radiating portion is: the signal of telecommunication of inputting a constant bit rate is launched the modulated light signal of respective rate through driving chip processing rear drive semiconductor laser (LD) or the light-emitting diode (LED) of inside.Receiving unit is: be converted to the signal of telecommunication by the optical detection diode behind the light signal input optical module of a constant bit rate, the signal of telecommunication of output phase code rate behind post amplifier.Optical module needs before dispatching from the factory through strict loopback test, meets the requirements to guarantee the optical module performance index; Also to pass through loopback test when optical module breaks down, check failure cause.
Optical module is carried out the principle of loopback test: in the RX path of optical module and transmit path, add corresponding switching device, optionally be communicated with or interruption RX path and transmit path, make the RX path of optical module be in different loopback test patterns with transmit path, be convenient to the position of breaking down is positioned.
In traditional optical module loopback test, before carrying out loopback test, need first by specific interface, the switching device programming of loopback is fixed to the test pattern of a certain appointment, then optical module is re-powered and make new configuration take-effective, then just can carry out follow-up test, namely can not realize real-time loopback control.
Summary of the invention
The object of the present invention is to provide the real-time loopback control system of a kind of optical module, this system can realize the real-time loopback control of optical module.
In order to realize the foregoing invention purpose, the invention provides following technical scheme:
The real-time loopback control system of a kind of optical module, comprise main frame, can be communicated with or disconnect the programmable switch array of optical module transmit path and RX path, described programmable switch array is arranged between the transmitter and laser driver in the optical module transmit path, and the optical module RX path in receiver and post amplifier between, described main frame is by in real time connection or the disconnection of the described programmable switch array of control of communication interface.
During loopback test, main frame is by connection or the disconnection of the real-time control switch array of communication interface, the loopback mode of elder generation's configuration switch device when loopback control system of the present invention has been avoided test, the link of testing after re-powering again, can realize the real-time control to switch arrays, locate rapidly the fault origination point.
According to the embodiment of the invention, described programmable switch array comprises the first single-pole double-throw switch (SPDT) device able to programme and the second single-pole double-throw switch (SPDT) device able to programme, the described first single-pole double-throw switch (SPDT) device able to programme is arranged between the transmitter and laser driver in the transmit path, the described second single-pole double-throw switch (SPDT) device able to programme is arranged between the receiver and post amplifier in the RX path, and the described first single-pole double-throw switch (SPDT) device able to programme and the second single-pole double-throw switch (SPDT) device able to programme can be communicated with or disconnect transmit path or RX path respectively.Use the single-pole double-throw switch (SPDT) device to realize being communicated with or disconnecting transmit path or RX path, avoid using more switching device and cause the optical module structure size to increase, also provide cost savings simultaneously, simplify the switching device control program.
According to the embodiment of the invention, in the real-time loopback control system of above-mentioned optical module, main frame reads by communication interface and judges current loopback settings, and according to different loopback settings in real time control the described first and second single-pole double-throw switch (SPDT) devices able to programme be communicated with respectively or disconnect optical module transmit path or RX path.
According to the embodiment of the invention, if the loopback settings are the first numerical value, then host computer control the first single-pole double-throw switch (SPDT) device able to programme is communicated with transmit path, and the second single-pole double-throw switch (SPDT) device able to programme is communicated with RX path.
If the loopback settings are second value, then host computer control the first single-pole double-throw switch (SPDT) device able to programme is communicated with RX path, and the second single-pole double-throw switch (SPDT) device able to programme is communicated with RX path.
If the loopback settings are third value, then host computer control the first single-pole double-throw switch (SPDT) device able to programme is communicated with transmit path, and the second single-pole double-throw switch (SPDT) device able to programme is communicated with transmit path.
If the loopback settings are the 4th numerical value, then host computer control the first single-pole double-throw switch (SPDT) device able to programme is communicated with RX path, and the second single-pole double-throw switch (SPDT) device able to programme is communicated with transmit path.
Described main frame is host computer or router or switch.
Compared with prior art, beneficial effect of the present invention: the real-time loopback control system of optical module of the present invention, be respectively arranged with single-pole double-throw switch (SPDT) device able to programme between transmitter in the optical module transmit path and the laser driver and between the receiver in the RX path and the post amplifier, can be communicated with or disconnect transmit path or RX path respectively, make optical module be in different loopback test patterns.During fault detect, main frame can be controlled connection or the disconnection of described two groups of single-pole double-throw switch (SPDT) devices able to programme in real time by communication interface, the realization loopback is controlled in real time, and in real time location is realized in the position of breaking down, and has effectively ensured optical module performance in use.
Description of drawings:
Fig. 1 is the real-time loopback control system of the present invention block diagram.
Fig. 2 is the FB(flow block) that system of the present invention realizes loopback control.
Fig. 3 is a kind of layout schematic diagram of switch arrays in the system of the present invention.
Fig. 4 is that the another kind of switch arrays in the system of the present invention is arranged schematic diagram.
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.
With reference to figure 1, the real-time loopback control system of optical module of the present invention comprises laser driver 20 and the transmitter 21 in the optical module transmit path, post amplifier 22 in the optical module RX path and receiver 23, between the laser driver 20 and transmitter 21 in the optical module transmit path, be provided with programmable switch array 24 between post amplifier 22 in the optical module RX path and the receiver 23, described programmable switch array 24 is connected with main frame 25 by communication interface, and described main frame 25 is controlled in real time programmable switch array 24 by described communication interface and is communicated with or disconnection optical module transmit path or optical module RX path.Described communication interface can be I
2C, SPI, UART, MDIO etc.Described main frame is host computer or router or switch.
With reference to figure 3, Fig. 4, the arrangement relation of having showed switch arrays among embodiment 1 and the embodiment 2, among the figure, S1 represents the first single-pole double-throw switch (SPDT) device able to programme, S2 represents the second single-pole double-throw switch (SPDT) device able to programme, " 0 " expression low level, " 1 " expression high level, be communicated with transmit path when S1 is " 0 " (being low level) and disconnect RX path, be communicated with RX path when S1 is " 1 " (being high level) and disconnect transmit path.Be communicated with RX path when S2 is " 0 " (being low level) and disconnect transmit path, be communicated with transmit path when S2 is " 1 " (being high level) and disconnect RX path.
The real-time loopback control system of optical module of the present invention, when carrying out fault detect, main frame reads the loopback settings immediately, and according to the different loopback settings that read, control immediately single-pole double-throw switch (SPDT) device S1 able to programme and S2 by communication interface, make S1 be in respectively different connections or off-state with S2, the control optical module is in different loopback test patterns, realizes in real time control.With traditional loopback test, first the switching device programming of loopback is fixed to the pattern of a certain appointment before the test, then optical module is re-powered and make new configuration take-effective, then just test, compare, system of the present invention can realize that loopback controls in real time, locates rapidly the fault origination point.
Describe the workflow of the real-time loopback control system of optical module of the present invention in detail below by the switch arrays of two different arrangement forms.
With reference to figure 2, Fig. 3, during loopback test, main frame reads loopback settings (being Configuration Values) immediately, and according to the loopback settings that read, the control optical module is in different loopback test patterns.
If the loopback settings are 0x00, then system sends low level signal by communication interface to the first single-pole double-throw switch (SPDT) device S1 able to programme, and control S1 is communicated with transmit path, namely is communicated with transmitter and laser driver; Send low level signal to the second single-pole double-throw switch (SPDT) device S2 able to programme, control S2 is communicated with RX path, namely is communicated with receiver and post amplifier.Under this kind pattern, the transmit path of optical module and RX path are independently carried out respectively normal signal transmission, but pilot signal can be in optical module and optical fiber normal transmission.During the signal normal transmission, switch arrays are in this kind pattern.
If the loopback settings are 0x01, then system sends high level signal by communication interface to the first single-pole double-throw switch (SPDT) device S1 able to programme, and control S1 is communicated with RX path, namely is communicated with laser driver and post amplifier; Send low level signal to the second single-pole double-throw switch (SPDT) device S2 able to programme, control S2 is communicated with RX path, namely is communicated with receiver and post amplifier.Under this kind pattern, if the signal that receives is identical with the signal of transmission, then can judge all normally operations of laser driver and post amplifier.By the signal analysis that the far-end optical module (or system) that receives is sent, can judge whether receiver works, judge that can optical fiber the normal transmission light signal.
If the loopback settings are 0x02, then system sends low level signal by communication interface to the first single-pole double-throw switch (SPDT) device S1 able to programme, and control S1 is communicated with transmit path, namely is communicated with laser driver and transmitter; Send high level signal to the second single-pole double-throw switch (SPDT) device S2 able to programme, control S2 is communicated with transmit path, namely is communicated with receiver and transmitter.Under this kind pattern, the far-end optical module (or system) that is communicated with by optical fiber with local optical module, if the signal that the local optical module that receives sends is identical with the signal that far-end optical module (or system) sends self, can judge that then local optical module transmitter and receiver all work, optical fiber can the normal transmission light signal.By the signal that the local optical module of analyzing far-end optical module (or system) reception sends, can judge whether laser driver works.
If the loopback settings are 0x03, then system sends high level signal by communication interface to the first single-pole double-throw switch (SPDT) device S1 able to programme, and control S1 is communicated with RX path, namely is communicated with laser driver and post amplifier; Send high level signal to the second single-pole double-throw switch (SPDT) device S2 able to programme, control S2 is communicated with transmit path, namely is communicated with receiver and transmitter.Under this kind pattern, if the signal that local optical module receives is identical with the signal of transmission, then can judge all normally operations of local optical module laser driver and post amplifier.If the signal that receives with far-end optical module (or system) that local optical module is communicated with by optical fiber is identical with the signal of transmission, transmitter and the receiver that then can judge local optical module and far-end optical module (or system) all work, and optical fiber can the normal transmission light signal.
With reference to figure 2, Fig. 4, main frame reads the loopback settings, and according to the loopback settings that read, the control optical module is in different loopback test patterns.
If the loopback settings are 0x00, then system sends low level signal by communication interface to the first single-pole double-throw switch (SPDT) device S1 able to programme, and control S1 is communicated with transmit path, namely is communicated with transmitter and laser driver; Send low level signal to the second single-pole double-throw switch (SPDT) device S2 able to programme, control S2 is communicated with RX path, namely is communicated with receiver and post amplifier.
If the loopback settings are 0x01, then system sends high level signal by communication interface to the first single-pole double-throw switch (SPDT) device S1 able to programme, and control S1 is communicated with RX path, namely is communicated with transmitter and receiver; Send low level signal to the second single-pole double-throw switch (SPDT) device S2 able to programme, control S2 is communicated with RX path, namely is communicated with receiver and post amplifier.Under this kind pattern, the signal of telecommunication that laser driver sends is back to post amplifier, and whether the signal by the signal that detect to send and reception is identical judges whether laser driver and post amplifier work.The signal of transmitter output to far-end optical module (or system), can judge by the signal of analyzing far-end optical module (or system) reception whether generator and optical fiber work through optical fiber.
If the loopback settings are 0x02, then system sends low level signal by communication interface to the first single-pole double-throw switch (SPDT) device S1 able to programme, and control S1 is communicated with transmit path, namely is communicated with laser driver and transmitter; Send high level signal to the second single-pole double-throw switch (SPDT) device S2 able to programme, control S2 is communicated with transmit path, namely is communicated with post amplifier and laser driver.Under this kind pattern, far-end optical module (or system) by analysis receive from the signal of local optical module and the signal that self sends, whether generator and the receiver that can judge local optical module and far-end optical module (or system) work, and whether optical fiber the normal transmission signal.Local optical module can judge also by analyzing the signal from far-end optical module (or system) that receives whether post amplifier works.
If the loopback settings are 0x03, then system sends high level signal by communication interface to the first single-pole double-throw switch (SPDT) device S1 able to programme, and control S1 is communicated with RX path, namely is communicated with laser driver and post amplifier; Send high level signal to the second single-pole double-throw switch (SPDT) device S2 able to programme, control S2 is communicated with transmit path, namely is communicated with receiver and transmitter.
Claims (8)
1. real-time loopback control system of optical module, it is characterized in that, this system comprises the programmable switch array that can be communicated with or disconnect optical module transmit path and optical module RX path, described programmable switch array is arranged between the transmitter and laser driver in the optical module transmit path, and the optical module RX path in receiver and post amplifier between, described programmable switch array is connected with main frame by communication interface;
Described main frame is by in real time connection or the disconnection of the described programmable switch array of control of communication interface.
2. the real-time loopback control system of optical module according to claim 1, it is characterized in that, described programmable switch array is the first single-pole double-throw switch (SPDT) device able to programme and the second single-pole double-throw switch (SPDT) device able to programme, the described first single-pole double-throw switch (SPDT) device able to programme is arranged between the transmitter and laser driver in the optical module transmit path, the described second single-pole double-throw switch (SPDT) device able to programme is arranged between the receiver and post amplifier in the optical module RX path, and the described first single-pole double-throw switch (SPDT) device able to programme and the second single-pole double-throw switch (SPDT) device able to programme can be communicated with or disconnect optical module transmit path or optical module RX path respectively.
3. the real-time loopback control system of optical module according to claim 2 is characterized in that,
Described main frame reads by communication interface and judges current loopback settings;
Control the described first single-pole double-throw switch (SPDT) device able to programme and the second single-pole double-throw switch (SPDT) device able to programme are communicated with respectively or disconnect optical module transmit path or optical module RX path in real time according to the loopback settings that read for described main frame.
4. the real-time loopback control system of optical module according to claim 3 is characterized in that,
If the current loopback settings that read are the first numerical value, host computer control the first single-pole double-throw switch (SPDT) device able to programme is communicated with the optical module transmit path, and the second single-pole double-throw switch (SPDT) device able to programme is communicated with the optical module RX path.
5. the real-time loopback control system of optical module according to claim 3 is characterized in that,
If the current loopback settings that read are second value, host computer control the first single-pole double-throw switch (SPDT) device able to programme is communicated with the optical module RX path, and the second single-pole double-throw switch (SPDT) device able to programme is communicated with the optical module RX path.
6. the real-time loopback control system of optical module according to claim 3 is characterized in that,
If the current loopback settings that read are third value, host computer control the first single-pole double-throw switch (SPDT) device able to programme is communicated with the optical module transmit path, and the second single-pole double-throw switch (SPDT) device able to programme is communicated with the optical module transmit path.
7. the real-time loopback control system of optical module according to claim 3 is characterized in that,
If the current loopback settings that read are the 4th numerical value, host computer control the first single-pole double-throw switch (SPDT) device able to programme is communicated with the optical module RX path, and the second single-pole double-throw switch (SPDT) device able to programme is communicated with the optical module transmit path.
8. one of according to claim 1-7 the real-time loopback control system of described optical module is characterized in that,
Described main frame is host computer or router or switch.
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| CN107171747A (en) * | 2017-07-17 | 2017-09-15 | 广东欧珀移动通信有限公司 | Receiving path diagnostic device, method and system, mobile terminal and storage medium |
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Application publication date: 20130206 |