CN201629746U - Self-loop optical module - Google Patents
Self-loop optical module Download PDFInfo
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- CN201629746U CN201629746U CN2010201805236U CN201020180523U CN201629746U CN 201629746 U CN201629746 U CN 201629746U CN 2010201805236 U CN2010201805236 U CN 2010201805236U CN 201020180523 U CN201020180523 U CN 201020180523U CN 201629746 U CN201629746 U CN 201629746U
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Abstract
The utility model discloses a self-loop optical module for being connected with an optical module interface of an optical communication system device when carrying out test on the optical communication system device. An interface of the self-loop optical module comprises a signal transmitting pin and a signal receiving pin. The signal transmitting pin is connected with the signal receiving pin by an AC coupling capacitance connected in series with the signal transmitting pin inside the self-loop optical module. The self-loop optical module adopting the utility model replaces the conventional optical module to be plugged on the optical module interface of the optical communication system device to carry out test on the system device, not only can reduce cost and improve the reliability of the optical communication system device, but also does not need to use an optical fiber and an attenuator in the testing process so as to reduce operation difficulty and improve the test accuracy of the device.
Description
Technical field
The utility model belongs to the optical communication technique field, specifically, relates to a kind of optical communication system equipment employed optical module when testing.
Background technology
Optical communication system equipment in the market is when carrying out system testing, and the method that is adopted all is the conventional optical module of pegging graft on the light mouth of equipment.The light mouth here promptly refers to be used on the optical communication system equipment terminal that is connected with the electrical interface of optical module, also can be described as the optical module interface.Peg graft behind the above the conventional optical module, use optical patchcord that the optical signal transceiver terminal of conventional optical module is coupled together, referring to shown in Figure 1, also need further on optical patchcord, to install additional attenuator then, after this could begin to carry out the operation test of system equipment, cause relatively very complicated of operating process thus.
On the other hand, every suit optical communication system equipment all will be through strict test before dispatching from the factory, an indispensable important flow process is exactly high temperature scale mould in test process, require veneer in hot environment, to move one period considerable time, and the function and the performance index of testing single-board during this period.The Optical Fiber Interface Board of Devices to test is in high temperature scale mold process, and one of its basic demand will guarantee to occur miscellaneous service alarm and error code exactly, therefore requires the complete optical module of Optical Fiber Interface Board configuration to carry out high temperature scale mould test.But this method of testing can cause the overaging of optical module, causes its lost of life, and failure rate increases, thereby finally causes the reliability of optical communication system equipment to reduce.
The utility model content
The utility model need connect conventional optical module in order to solve existing optical communication system equipment when testing, cause complicated operation thus, cause the problem of optical module overaging easily, provide a kind of from encircling optical module, substitute conventional optical module to the optical communication system testing equipment with this, can reduce operation easier, improve the reliability of system.
In order to solve the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of from encircling optical module, be used for when the optical communication system testing equipment, connecting the optical module interface of optical communication system equipment, send pin and signal reception pin at the described signal that includes in the interface that encircles optical module, described signal transmission pin connects described signal by the ac coupling capacitor that encircles the inner series connection with it of optical module certainly and receives pin.
Further, described signal sends pin and signal reception pin is the differential signal transmission pin, and wherein, the differential signal of positive polarity sends pin and receives pin by the differential signal that one road ac coupling capacitor connects positive polarity; The differential signal of negative polarity sends pin and receives pin by the differential signal that other one road ac coupling capacitor connects negative polarity.
In order to realize the impedance matching of data-signal, preferably the differential signal in described positive and negative polarity sends cross-over connection build-out resistor between the pin.
Further again, also include a pair of reference clock differential signal input pin described from encircling in the interface of optical module, cross-over connection therebetween has build-out resistor, is used to realize the impedance matching at the external clock source signal.
Further again, in the interface that encircles optical module, also include receiver dropout status-pin and transmitter output prohibited state pin described, two pins directly are communicated with by lead.
Further, also include not existence pin of the unripe status-pin of module and module, the equal ground connection of two pins described in the interface of optical module from encircling.
Further again, in the interface that encircles optical module, also include the interrupt signal pin described, connect described from the DC power supply of encircling optical module inside.
For satisfying the instructions for use of different user, also be provided with eeprom memory described in the optical module from encircling, pass through I
2The C bus connects from the SDA, the SCL pin that encircle in the optical module interface, is used for the information such as model with systems exchange customer information, optical module.
Wherein, the Enable Pin of described EEPROM connects from the module of encircling in the optical module interface selects the cancellation status-pin, to I
2The C bus data enables control.
Preferably, encircle on the internal circuit board of optical module certainly described, the right differential impedance of the differential signal line in its PCB cabling is 100 Ω ± 10%, and the single-ended impedance of single-ended signal line is 50 Ω ± 10%.
Compared with prior art, advantage of the present utility model and good effect are: adopt of the present utility model from encircling the optical module that optical module replaces routine, be plugged on the optical module interface of optical communication system equipment, carry out the test of system equipment, not only can reduce cost, improve the reliability of optical communication system equipment, and in test process, do not need to use optical fiber and attenuator, therefore reduce operation easier, improved the accuracy of testing of equipment.
After reading the detailed description of the utility model execution mode in conjunction with the accompanying drawings, other characteristics of the present utility model and advantage will become clearer.
Description of drawings
Fig. 1 is the system architecture diagram when adopting conventional optical module to carry out the optical communication system testing of equipment;
Fig. 2 is the circuit theory diagrams of a kind of embodiment that encircles optical module certainly that proposes of the utility model;
Fig. 3 adopts the system architecture diagram when encircling optical module and carry out the optical communication system testing of equipment shown in Figure 2.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is done explanation in further detail.
The utility model is in order to realize the operation test of optical communication system equipment under the prerequisite of not using conventional optical module, proposed a kind ofly to be used for the normal actual light module of alternative functions from encircling optical module, realizes that communication data is encircling the automatic loopback of optical module inside certainly.It is installed on the Optical Fiber Interface Board of Devices to test, can in the test of equipment and ageing process, be extensive use of.After testing of equipment and burin-in process, will encircle optical module certainly and take off, change actual conventional optical module, can form complete optical communication system equipment, carry out the transmitting-receiving of light signal and handle.
Elaborate described from particular circuit configurations and the operation principle thereof of encircling optical module below by a specific embodiment.
Embodiment one, referring to shown in Figure 2, present embodiment encircle optical module certainly in order to peg graft be used to the to peg graft self check light mouth coupling for the treatment of of conventional optical module on the optical communication system equipment, copy the pin definitions of electrical interface on the conventional optical module that each pin that encircles certainly in the optical module interface is carried out matching Design and definition, comprise that the signal that is in series by ac coupling capacitor sends pin TD and signal receives pin RD, be used to receive the signal input tube pin REFCLK of pulse reference clock and various status signal transmission pin or the like.Because present optical communication system equipment all is the form transport communication data with differential signal, therefore, in the Interface design of encircling optical module certainly of present embodiment, signal is sent pin and signal receive signal transmission pin, i.e. TD+ among Fig. 2, TD-and RD+, the RD-that pin is designed to difference form.Wherein, the differential signal of positive polarity sends pin TD+ connects positive polarity by the ac coupling capacitor C1 of series connection differential signal reception pin RD+; The differential signal of negative polarity sends pin TD-and receives on the pin RD-by the differential signal that the ac coupling capacitor C2 that connects is connected to negative polarity.When the optical communication system testing equipment, send the communication data that pin TD+/TD-receives electrical signal form from the ring optical module by its differential signal, through behind the loopback, receive pin RD+/RD-from its differential signal and return to optical communication system equipment, whether system equipment can detect system by connected communication service tester and move normal.
In the present embodiment, can to adopt the appearance value be that the chip ceramic capacitor of 0.1 μ F carries out circuit design for described ac coupling capacitor C1, C2.
In order to realize the impedance matching of above-mentioned Differencing communication datagram number, present embodiment is at the differential signal of the positive and negative polarity build-out resistor R1 that sent between pin TD+, the TD-cross-over connection, as shown in Figure 2, and to guarantee the accuracy of signal transmission.Described build-out resistor R1 can adopt precision 5%, resistance is that the resistance of 100 Ω is realized, present embodiment be not limited in above for example.
Certainly the ring optical module of present embodiment, reference clock signal pin REFCLK in its interface also should be designed to difference form according to the optical module interface definition of optical communication system equipment, be reference clock differential signal input pin REFCLK+, the REFCLK-among Fig. 2, be used for the reference clock that receiving system equipment sends.Cross-over connection has a build-out resistor R2 between described REFCLK+, REFCLK-pin, is used to realize the impedance matching at the external clock source signal.In the present embodiment, described build-out resistor R2 can adopt the resistance device of 100 Ω ± 5% to carry out circuit design.
Certainly encircle optical module after being plugged on the light mouth of optical communication system equipment for what make present embodiment, system equipment can normally move, the transmitting-receiving communication data, to carry out the test of system, need the potential state that encircle each the line state pin in the optical module interface certainly specifically be provided with, promptly be set to fixing effective or disarmed state, present embodiment has adopted following pin configuration mode:
(1) the receiver dropout status-pin RX_LOS and the transmitter output prohibited state pin TX_DIS that will encircle certainly in the optical module interface directly is communicated with by lead, and inside modules is supreme draws.Because it is effective that receiver dropout status-pin RX_LOS and transmitter output prohibited state pin TX_DIS are high level, when forbidding transmitter output light signal, what transmitter output prohibited state pin TX_DIS received is high flat signal, this high level signal directly transfers to receiver dropout status-pin RX_LOS, put this pin and also be high level, at this moment, system equipment is promptly thought and is met test logic by the receiver dropout; Vice versa.
(2) will encircle not existence pin MOD_ABS ground connection GND of unripe status-pin MOD_NR of module in the optical module interface and module certainly, promptly be changed to low level, and make it be in disarmed state, thereby can not have influence on the normal operation of system.
(3) the interrupt signal pin INTERRUPT that will encircle certainly in the optical module interface is connected with the DC power supply VCC of optical module inside, makes it be changed to the high level disarmed state, in order to avoid board software is judged by accident, influences the operate as normal of veneer.
In addition, in the optical module of ring certainly of present embodiment, also designed an eeprom memory, as shown in Figure 2, stored data such as configuration information relevant and customer information, and pass through I with optical module
2The C bus connects from the I that encircles in the optical module interface
2C bus pin SDA, SCL, after encircling optical module certainly and being plugged on the optical communication system equipment, the relevant information of system equipment by storing among the universal serial bus visit EEPROM, and then can realize functions such as client identity checking or optical module information inquiry, to satisfy user's instructions for use.Meanwhile, the Enable Pin of eeprom memory can also be connected from the module of encircling in the optical module interface and select cancellation status-pin MOD_DESEL, to realize that system equipment is to I
2The C bus data enable control.
In order further to improve, the PCB cabling of transceive data differential lines has been carried out specific (special) requirements from the global design that encircles the inner PCB of optical module: on PCB, walk differential lines to the time, requiring differential impedance therebetween is 100 Ω ± 10%; When walking the single-ended signal line, requiring single-ended impedance is 50 Ω ± 10%.
For the optical module of ring certainly that makes present embodiment meets XFP MSA standard, except its profile and structure should meet the requirement of XFP MSA, the pin of its inner power supply and ground connection is connected the requirement that also should meet XFP MSA, and other details of not making specified otherwise also will meet the requirement of XFP MSA.
Its interface of the optical module of ring certainly of present embodiment can be designed to the golden finger interface form, and its pin is arranged and PCB designs the requirement that will meet XFP MSA.
To the optical communication system testing equipment time, be plugged on the light mouth that needs on the system equipment to test from encircling optical module above-mentioned, test getting final product then according to the system testing program of routine, its system architecture diagram is referring to shown in Figure 3.
Adopt the optical module of ring certainly of present embodiment, after the system equipment test is finished,, then can be used as light mouth plug and be plugged on this light mouth encircling optical module certainly if corresponding light mouth does not temporarily need work.
Adopt and of the present utility modelly the data that system equipment sends are carried out loopback detection from encircling optical module, overcome of the dependence of traditional test mode conventional optical module.Owing to when system equipment is tested, no longer need the conventional optical module of pegging graft, therefore optical fiber also need not to be connected with attenuator, thereby simplified operating process greatly, reduced cost, and the overaging problem of having avoided conventional optical module to cause in high temperature scale mold process has improved the reliability of system equipment.
Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also should belong to protection range of the present utility model.
Claims (10)
1. one kind is encircled optical module certainly, it is characterized in that: the optical module interface that is used for when the optical communication system testing equipment, connecting optical communication system equipment, send pin and signal reception pin at the described signal that includes in the interface that encircles optical module, described signal transmission pin connects described signal by the ac coupling capacitor that encircles the inner series connection with it of optical module certainly and receives pin.
2. according to claim 1 from encircling optical module, it is characterized in that: described signal sends pin and signal reception pin is the differential signal transmission pin, wherein, the differential signal of positive polarity sends pin and receives pin by the differential signal that one road ac coupling capacitor connects positive polarity; The differential signal of negative polarity sends pin and receives pin by the differential signal that other one road ac coupling capacitor connects negative polarity.
3. according to claim 2 from encircling optical module, it is characterized in that: cross-over connection has resistance between the differential signal transmission pin of described positive and negative polarity.
4. according to each is described from encircling optical module in the claim 1 to 3, it is characterized in that: also include a pair of reference clock differential signal input pin described in the interface that encircles optical module, cross-over connection therebetween has build-out resistor.
5. according to claim 4 from encircling optical module, it is characterized in that: also include receiver dropout status-pin and transmitter output prohibited state pin described in the interface that encircles optical module, two pins directly are communicated with by lead.
6. according to claim 5 from encircling optical module, it is characterized in that: in the interface that encircles optical module, also include not existence pin of the unripe status-pin of module and module, the equal ground connection of two pins described.
7. according to claim 6 from encircling optical module, it is characterized in that: in the interface that encircles optical module, also include the interrupt signal pin described, connect described from the DC power supply of encircling optical module inside.
8. according to claim 7 from encircling optical module, it is characterized in that: also include eeprom memory described in the optical module from encircling, pass through I
2The C bus connects from the SDA, the SCL pin that encircle in the optical module interface.
9. according to claim 8 from encircling optical module, it is characterized in that: the Enable Pin of described EEPROM connects from the module of encircling in the optical module interface selects the cancellation status-pin.
10. according to claim 9 from encircling optical module, it is characterized in that: encircle on the internal circuit board of optical module certainly described, the right differential impedance of the differential signal line in its PCB cabling is 100 Ω ± 10%, and the single-ended impedance of single-ended signal line is 50 Ω ± 10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201805236U CN201629746U (en) | 2010-04-28 | 2010-04-28 | Self-loop optical module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201805236U CN201629746U (en) | 2010-04-28 | 2010-04-28 | Self-loop optical module |
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|---|---|
| CN201629746U true CN201629746U (en) | 2010-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010201805236U Expired - Lifetime CN201629746U (en) | 2010-04-28 | 2010-04-28 | Self-loop optical module |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102346222A (en) * | 2011-06-09 | 2012-02-08 | 迈普通信技术股份有限公司 | Device, system and method for testing output electrical signals of optical interfaces |
| CN102647229A (en) * | 2012-04-16 | 2012-08-22 | 中兴通讯股份有限公司 | XFP (10 Gigabit Small Form Factor Pluggable) interface optical module self-loop method and device |
| WO2021115445A1 (en) * | 2019-12-12 | 2021-06-17 | 中兴通讯股份有限公司 | Method, system and apparatus for testing degradation of optical module, and storage medium |
| CN113325528A (en) * | 2021-06-09 | 2021-08-31 | 武汉华工正源光子技术有限公司 | Optical module of detachable optical port and testing method of AOC optical module |
| WO2022041875A1 (en) * | 2020-08-26 | 2022-03-03 | 华为技术有限公司 | Optical transceiver and optical signal processing method |
-
2010
- 2010-04-28 CN CN2010201805236U patent/CN201629746U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102346222A (en) * | 2011-06-09 | 2012-02-08 | 迈普通信技术股份有限公司 | Device, system and method for testing output electrical signals of optical interfaces |
| CN102346222B (en) * | 2011-06-09 | 2013-09-18 | 迈普通信技术股份有限公司 | Device, system and method for testing output electrical signals of optical interfaces |
| CN102647229A (en) * | 2012-04-16 | 2012-08-22 | 中兴通讯股份有限公司 | XFP (10 Gigabit Small Form Factor Pluggable) interface optical module self-loop method and device |
| CN102647229B (en) * | 2012-04-16 | 2017-04-12 | 中兴通讯股份有限公司 | XFP (10 Gigabit Small Form Factor Pluggable) interface optical module self-loop method and device |
| WO2021115445A1 (en) * | 2019-12-12 | 2021-06-17 | 中兴通讯股份有限公司 | Method, system and apparatus for testing degradation of optical module, and storage medium |
| CN112994786A (en) * | 2019-12-12 | 2021-06-18 | 中兴通讯股份有限公司 | Optical module degradation testing method, system, equipment and storage medium |
| CN112994786B (en) * | 2019-12-12 | 2024-02-23 | 中兴通讯股份有限公司 | Optical module degradation testing method, system, equipment and storage medium |
| WO2022041875A1 (en) * | 2020-08-26 | 2022-03-03 | 华为技术有限公司 | Optical transceiver and optical signal processing method |
| CN113325528A (en) * | 2021-06-09 | 2021-08-31 | 武汉华工正源光子技术有限公司 | Optical module of detachable optical port and testing method of AOC optical module |
| WO2022257109A1 (en) * | 2021-06-09 | 2022-12-15 | 武汉华工正源光子技术有限公司 | Optical module with removable optical port, and testing method for aoc optical module |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101110 |
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| CX01 | Expiry of patent term |