CN108880674A - A kind of optical module for local loopback test - Google Patents
A kind of optical module for local loopback test Download PDFInfo
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- CN108880674A CN108880674A CN201810989499.1A CN201810989499A CN108880674A CN 108880674 A CN108880674 A CN 108880674A CN 201810989499 A CN201810989499 A CN 201810989499A CN 108880674 A CN108880674 A CN 108880674A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2589—Bidirectional transmission
- H04B10/25891—Transmission components
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Abstract
The invention discloses a kind of optical modules for local loopback test, the test application environment under the conditions of different power consumption can be simulated, real-time and accurately acquire feedback-related information, suitable for the network equipment under the conditions of a variety of different modulating types and rate and different link attenuations, the testing time is shortened while improving measuring accuracy and accuracy rate and reduces testing cost.The optical module includes：Multiple interfaces, attenuator circuit ATT, CDR module, micro-control unit MCU, multipath control switch and the multiple load resistances encapsulated according to preset protocol；Wherein, MCU is used to be arranged according to preset protocol the initialization modulating mode and level of power consumption of optical module, and control CDR module uses PAM-4 modulating mode or NRZ modulating mode, and switches the rate of each signaling interface according to modulating mode；And the corresponding load power consumption value of setting is controlled, and control the network mapping that CDR module is established between input/output signal interface.
Description
Technical field
The present invention relates to technical field of optical fiber communication, more particularly to one kind are (herein for local loopback Loopback
Loopback refers in particular to local loopback) test optical module.
Background technique
In recent years, with the rapid development of mobile communication technology, the 5th third-generation mobile communication technology " 5G " will progress into me
Life, as the carrier of 5G communication system, the network equipments such as high rate optical module and corresponding router, interchanger can be big
Amount uses.Conventional network equipment carries out signal transmission and interaction mostly uses nonreturn to zero code NRZ mode to be modulated greatly, that is, uses two
Signal level is planted to indicate 0,1 information of digital logic signal, each symbol period can transmit the logical message of 1 bit；And arteries and veins
Rushing amplitude modulation PAM signal then can be using more signal level, so that each symbol period can transmit more bit information.With
For PAM-4 signal, 4 different signal levels are used to carry out signal transmission, each symbol period can indicate 2
The logical message (0,1,2,3) of bit.Therefore, same signal transmission capabilities to be realized, the character rate of PAM-4 signal only needs
Reach the half of NRZ signal, therefore transmission channel is lost caused by it and will greatly reduce.
In the formulation process of high rate optical module interface standard, most basic demand is the data speed in each pair of high-speed line
Rate will be increased to 50Gbps or more, if still using NRZ modulation technique, each symbol period is only less than 20ps, for transmitting-receiving
Hold chip time margin and transmission link loss require it is harsher, so PAM-4 modulation technique use almost at
For inexorable trend.However, conventional high rate rate network communication equipment can hardly support PAM-4 modulating mode；Existing test side
Formula must also be using optical module, optical fiber, optical attenuation or amplifier and other test cable test system building (i.e. non-local rings
Return), not only testing cost is expensive, testing efficiency is low for which, and also takes up a large amount of test resource, it is difficult to carry out online
High/low temperature, system level testing etc..
Existing market does not support the Loopback of NRZ/PAM-4 modulating mode to test optical module simultaneously, has
QSFP28Loopback test optical module is that 4 road NRZ signals are carried out loopback, each channel highest loopback speed by ce circuit
Rate is only 28Gbps.Existing QSFP28Loopback test optical module does not support PAM-4 etc. using NRZ modulating mode
Debugging mode and its corresponding speed are expanded, and in addition every QSFP28Loopback test optical module only corresponds to a kind of level of power consumption,
As there is the testing requirement of different power consumption grade at the end Host, it is necessary to which the Loopback module for customizing a variety of different power consumptions is surveyed
Examination, not only increases testing cost, but also bring inconvenience to test job.
Different attitudes are held to the developing direction of the following high-speed module by major network carrier of the world at present, and some thinks
QSFP-DD series of high speed rate optical module will become main product, also it is believed that OSFP or CFP series of high speed rate optical module will be led
Lead market trend；For next-generation high rate optical module development trend, when not yet reaching an agreement all over the world,
QSFP-DD, OSFP, CFP series optical module will rise and develop simultaneously；The Loopback of existing single type tests optical module
It will be unable to cover the application of most of Host end switch.
Summary of the invention
An object of the present invention at least that, for how to overcome the above-mentioned problems of the prior art, provide one kind
For the optical module of local loopback test, the test application environment under the conditions of different power consumption can be simulated, is real-time and accurately acquired
Feedback-related information is being mentioned suitable for the network equipment under the conditions of a variety of different modulating types and rate and different link attenuations
The testing time is shortened while high measuring accuracy and accuracy rate and reduces testing cost.
To achieve the goals above, the technical solution adopted by the present invention includes following aspects.
A kind of optical module for local loopback test comprising：According to multiple interfaces of preset protocol encapsulation, decaying electricity
Road ATT, CDR module, micro-control unit MCU, multipath control switch and multiple load resistances；
Wherein, it is connected according to multiple interfaces of preset protocol encapsulation for interface corresponding with tested host equipment
It connects comprising multiple input signal interfaces for from host equipment received data packet, it is multiple for number to occur to host equipment
According to the output signal interface of packet, six power interfaces for powering to optical module, including data line SDA and clock cable
The I2C bus interface of SCL and the control of multiple states and instruction interface；Each input signal interface and output signal interface are equal
Interface can be switched in the rate for being set as single channel 25Gbps or 50Gbps；Input signal interface is connected to via attenuator circuit ATT
CDR module；
MCU is used to be arranged according to preset protocol the initialization modulating mode and level of power consumption of optical module；MCU passes through I2C
Bus interface connect to instruct and send diagnostic message to receive the loopback test from host equipment with host equipment and set to host
It is standby, it is connect by MDIO/MDC bus interface with CDR module, and connect by GPIO interface with multipath control switch；MCU is into one
Walk for according to loopback test instruct in information controlled by the register that MDIO/MDC bus interface is arranged in CDR module
CDR module carries out signal modulation using PAM-4 modulating mode or NRZ modulating mode, and each defeated according to modulating mode switching
Enter the rate of signaling interface and output signal interface；
MCU is further used for leading on-off via GPIO interface control multipath control switch according to identified modulating mode
One or more of multiple load resistances are opened corresponding load power consumption value is arranged to match corresponding power consumption of preset protocol etc.
Grade, and the network between input signal interface and output signal interface is established via MDIO/MDC bus interface control CDR module
Mapping.
Preferably, the attenuator circuit ATT includes 8 π type attenuator circuits, each of these is by 4 digital resistors
It constitutes, by the combination of different digital resistor, different grades of decaying is carried out to signal.
Preferably, the CDR module includes sequentially connected continuous time linear equalizer CTLE, ce circuit, Yi Jiqian
To error correction FEC repeat circuit；
Multiple AC coupled capacitors are connected between the input terminal and output end of CDR module to filter out the direct current in high-frequency signal
Component.
Preferably, the optical module further comprises the temperature sensor that MCU is connected to via GPIO interface, voltage acquisition
Circuit and multiple status indicator lamps.
Preferably, the MCU is used to obtain the real-time temperature of optical module periodically by temperature sensor, voltage collection circuit
Degree and supply voltage, and judge temperature and supply voltage whether within the scope of the job requirement of optical module；When operating temperature and work
Make voltage in the normal range when, optical module work normally, MCU state of a control indicator light display work normally information；Work as mould
When block operating temperature or supply voltage are more than job requirement range, MCU state of a control indicator light display alarm information, and pass through
Control switch inside MCU is cut off the power the power supply that interface is connected, to protect tested host equipment and optical module.
Preferably, the MCU is further used for judging whether to modulate mould using PAM-4 according to loopback test instruction first
Formula, if host equipment instruction using PAM-4 modulating mode and identical as initial modulation mode, not switch modulation mode；It goes forward side by side
One step judges whether to switch level of power consumption；If host equipment instruction raises or lowers level of power consumption, MCU passes through GPIO interface
Control multipath control switch be turned on or off one or more of multiple load resistances be arranged corresponding load power consumption value with
Match the instruction level of power consumption in loopback test instruction；Be not required to carry out level of power consumption switching or complete switching after, MCU via
MDIO/MDC bus interface control CDR module establishes the network mapping between input signal interface and output signal interface, and controls
CDR module processed sends data packet under the driving of PAM-4 modulating mode.
Preferably, if host equipment instruction uses NRZ modulating mode and, MCU not identical as initial modulation mode
Modulating mode is switched to NRZ modulating mode by corresponding register in MDIO/MDC bus interface selection CDR module；Into
One step, MCU judges whether to switch level of power consumption；If host equipment instruction raises or lowers level of power consumption, correspondence is opened
Multichannel loading switch in channel is to match the instruction level of power consumption in loopback test instruction；And establish input signal interface and output letter
Network mapping between number interface, control CDR module can send data packet under the driving of NRZ modulating mode.
Preferably, the rate for switching each input signal interface and output signal interface according to modulating mode includes：
The rate of each input signal interface and output signal interface is switched to 50Gbps when using PAM-4 modulating mode, is being adopted
The rate of each input signal interface and output signal interface is switched to 25Gbps with when NRZ modulating mode.
Preferably, the preset protocol is one of QSFP-DD, CFP, CFP2, CFP4, CFP8, OSFP MSA agreement.
Preferably, the optical module structure part includes pedestal, unlock piece drawstring, spring, PCB component, LED light tube, lid
Plate and screw；
Wherein, attenuator circuit ATT, CDR module, micro-control unit MCU, multipath control switch and multiple load resistances
It is arranged at PCB component, the golden finger that LED light tube and multiple interfaces are drawn is connected to PCB component；It is provided on pedestal
It is caught in the erecting bed of PCB component, and pedestal one end is provided in the circular trough for being caught in LED light tube to be fixed；Bottom
The seat screw hole opposite at least four positions are each provided on cover board by corresponding the two to be combined to screw to be fixed.
In conclusion by adopting the above-described technical solution, the present invention at least has the advantages that：
By being integrated with while supporting the CDR module of PAM-4 and NRZ modulating mode, different modulating type can be suitable for
With the network equipment under the conditions of rate and different link attenuation, standard speed range cover Datacom, Infiniband,
All standard applications including Fiber Channel etc.；Accomplish using 1 test module, to be compatible with the purpose of a variety of applications, no
Only widened the application environment of Loopback test optical module, also for network device manufacturers save a large amount of testing cost and when
Between；
By being the interfaces such as QSFP-DD, CFP, CFP2, CFP4, CFP8, OSFP by the light module package of the embodiment of the present invention
Type provides complete factory performance test scheme for the end the Host network equipment of corresponding high-speed interface type, is manufacturer
Expensive testing expense is eliminated, reduces system testing difficulty, while also improving testing efficiency；
Circuit is monitored by the way that high-precision temperature detector and operating voltage are arranged in optical module, can real-time and accurately be adopted
Collect the internal temperature and module operating voltage and to Host host side feedback-related information of module；
By status indicator lamp, tester can intuitively see working condition locating for module, and combine Host host
The monitoring information at end accurately judges whether equipment under test is normal；
By being integrated with the controllable level of power consumption selection function of program, tester can be sent by host by I2C bus
Instruction selection different power consumption mode, simulates the test application environment under the conditions of different power consumption.
Detailed description of the invention
Fig. 1 shows the optical module according to an exemplary embodiment of the present invention for local loopback test.
Fig. 2 shows the optical module course of work signals according to an exemplary embodiment of the present invention for local loopback test
Figure.
The STRUCTURE DECOMPOSITION that Fig. 3 shows the optical module according to an exemplary embodiment of the present invention for local loopback test is shown
It is intended to.
Fig. 4 shows the optical module contour structures signal according to an exemplary embodiment of the present invention for local loopback test
Figure.
Specific embodiment
With reference to the accompanying drawings and embodiments, the present invention will be described in further detail, so that the purpose of the present invention, technology
Scheme and advantage are more clearly understood.It should be appreciated that described herein, specific examples are only used to explain the present invention, and does not have to
It is of the invention in limiting.
Fig. 1 shows the optical module according to an exemplary embodiment of the present invention for local loopback test.The embodiment
Optical module mainly includes：According to preset protocol encapsulation multiple interfaces, attenuator circuit ATT, CDR module, micro-control unit MCU,
Multipath control switch and multiple load resistances.Wherein, preset protocol can be dual density four-way small package it is hot-swappable
Module (QSFP-DD) multi-source agreement (MSA), (eight channels are small-sized by small package hot plug CFP, CFP2, CFP4, CFP8, OSFPMSA
Pluggable SFP) etc., hereafter with the high-speed of QSFP-DD MSA protocol encapsulation in the embodiment not illustrated
It is illustrated for Loopback optical module.
Wherein, it is used for and tested host equipment (Host, such as exchange according to multiple interfaces of preset protocol encapsulation
The network equipments such as machine, router) corresponding interface is connected；Specifically, including eight are used for from host equipment received data packet
Input signal interface (RX1+, RX1- ..., RX8+, RX8-), eight for the output signal of data packet to occur to host equipment
Interface (TX1+, TX1- ..., TX8+, TX8-), six (two being shown in figure, other are not shown) to optical module for powering
Power interface VCC, I2C bus interface including data line SDA and clock cable SCL and the control of multiple states
And instruction interface (including reset control interface Reset_L, malfunction instruction interface Int_L, model selection control interface
Modsel_L, low-power consumption mode control interface Lpmode_L, failure insert state indicate interface Modprs_L, wherein suffix " _ L "
Indicate that low level is effective)；Power interface VCC passes through slow start circuit and DC-DC conversion circuit to CDR module for power supply respectively, leads to
Slow start circuit is crossed to power to MCU and multipath control switch.Each input signal interface and output signal interface are disposed as list
Interface can be switched in the rate of channel 25Gbps or 50Gbps.
Input signal interface is connected to CDR module via attenuator circuit ATT, and CDR module includes sequentially connected consecutive hours
Between linear equalizer CTLE, ce circuit and forward error correction FEC repeat circuit；Wherein, attenuator circuit ATT may include 8 π
Type attenuator circuit, each of these is made of 4 digital resistors, by the combination of different digital resistor, to realize pair
High speed signal, which carries out different grades of decaying, (for example, for the optical module of QSFP-DD MSA agreement, will default high frequency attenuation value
Be set as 0, i.e., undamped)；Continuous time linear equalizer CTLE is for eliminating or weakening broadband connections time delay bring intersymbol
Crosstalk；Ce circuit when being reset, and restores data for extracting clock signal from data packet；Forward error correction
FEC repeat circuit is for correcting transmission error code；Be connected between the input terminal and output end of CDR module multiple AC coupled capacitors with
Filter out the DC component in high-frequency signal；It can guarantee that high-speed data is passing by being applied in combination for a variety of circuits in CDR module
Signal amplitude is undistorted, high-low frequency weight is unattenuated, transmission process does not generate or generates error code less during defeated etc., to protect
Card high speed packet can be correctly validated when being transferred to receiving end from transmitting terminal.
MCU is used to be arranged according to preset protocol the initialization modulating mode and level of power consumption of optical module；MCU passes through I2C
Bus interface is connect to receive the loopback test from host equipment and instruct and send diagnostic message (for example, light with host equipment
The information such as temperature, the operating voltage of module, and protocol format as defined in being encapsulated as SFF-8472MSA etc.) to host equipment, pass through
MDIO/MDC bus interface is connect with CDR module, and by GPIO (General Purpose Input Output, it is general defeated
Entering/export) interface connect with multipath control switch；MCU be further used for being instructed according to loopback test in information pass through MDIO/
Register in MDC bus interface setting CDR module uses PAM-4 modulating mode or NRZ modulating mode to control CDR module
Signal modulation is carried out, and cuts the rate of each input signal interface and output signal interface when using PAM-4 modulating mode
It is changed to 50Gbps, is switched to the rate of each input signal interface and output signal interface when using NRZ modulating mode
25Gbps；MCU is further used for leading on-off via GPIO interface control multipath control switch according to identified modulating mode
Open multiple load resistances (R1, R2 ... one or more of 8) Rn, such as n are corresponding load power consumption value to be arranged to match
The corresponding level of power consumption of preset protocol (for example, eight grades such as 3.5W, 7W, 8W, 9W, 10W, 12W, 14W and > 14W), and pass through
Network mapping between input signal interface and output signal interface is established by MDIO/MDC bus interface control CDR module.
Wherein, the register in setting CDR module includes：N byte length since the address chip register A can be used
In selection modulating mode, bandwidth and rate, when needing to be arranged PAM-4 modulating mode by corresponding address in A~address (A+N)
Position is configured selection PAM-4 according to register table, while masking NRZ mode；Conversely, when needing to be arranged NRZ modulating mode,
PAM-4 corresponding address register is masked, NRZ address register is selected.
In a preferred embodiment, the above-mentioned optical module for local loopback test can also include connecting via GPIO interface
Temperature sensor, voltage collection circuit and the multiple status indicator lamps connect.MCU passes through temperature sensor, voltage collection circuit
The real time temperature and supply voltage of optical module are obtained in real time, and judge whether temperature and supply voltage are wanted in the work of optical module
It asks in range；When operating temperature and operating voltage in the normal range when (for example, temperature is -40~+85 DEG C, voltage is
3.135~3.465V), optical module works normally, and the display of MCU state of a control indicator light works normally information；When module work temperature
When degree or supply voltage are more than job requirement range, MCU state of a control indicator light display alarm information, and by inside MCU
Control switch is cut off the power the power supply that interface is connected, to protect tested host equipment and optical module.
In a specific embodiment, above-mentioned multiple status indicator lamps include at least two different colors of state and refer to
Show lamp, for example including a red LED and a green LED, by different display combinations of states, intuitively by optical module
Working condition show that and it is aobvious that can the relevant informations such as the DDM (digital diagnostic monitoring) that Host host is shown be carried out with supplement
Show, working condition shown by status indicator lamp is as shown in table 1 below：
Table 1
In a preferred embodiment, the optical module for local loopback test further includes for storing in working condition
Portion's memory, MCU are further used for through I2C bus interface from host equipment reception state more new command, and more according to state
New command between low power consumption control interface and internal storage, reset between control interface and internal storage, model selection
Switch the work of optical module between control interface and internal storage and between malfunction instruction interface and internal storage
State.
Fig. 2 shows the optical module course of work signals according to an exemplary embodiment of the present invention for local loopback test
Figure.When multiple interfaces interface corresponding with tested host equipment in optical module according to preset protocol encapsulation establishes connection
Afterwards, the MCU in optical module opens power interface connection power supply (step 201) within the time that preset protocol requires, and is arranged just
Beginning modulating mode, level of power consumption (step 202).For example, the optical module initial modulation mode setting encapsulated according to QSFP-DD MSA
For PAM-4, level of power consumption 8W.
MCU receives loopback test from Host by I2C bus interface and instructs (step 203), and is instructed according to loopback test
To determine whether being modulated pattern switching and/or level of power consumption switching.Specifically, it is according to loopback test instruction judgement first
It is no use PAM-4 modulating mode (step 204), if host equipment instruction using PAM-4 modulating mode and with initial modulation mode
It is identical, then not switch modulation mode.
It (is needed under PAM-4 modulating mode since the corresponding level of power consumption of PAM-4 with NRZ modulating mode is different under same rate
CDR module/chip interior DSP function is opened, and NRZ modulating mode does not need to open), level of power consumption need to be calculated by MCU
It compensates afterwards and by the selection of program-controlled multipath control switch.Therefore it needs to further determine whether switching level of power consumption (step
205)；If host equipment instruction raises or lowers level of power consumption, MCU controls multipath control switch by GPIO interface and is connected
Or one or more of multiple load resistances are disconnected come corresponding load power consumption is arranged to match in loopback test instruction finger
Show level of power consumption (step 206)；After being not required to carry out level of power consumption switching or complete switching, MCU is via MDIO/MDC bus
Interface Controller CDR module establishes the network mapping (step 207) between input signal interface and output signal interface.Later, it controls
CDR module processed can send data packet under the driving of PAM-4 modulating mode.
After above-mentioned steps 204, if host equipment instruction using NRZ modulating mode and not identical as initial modulation mode,
Then modulating mode is switched to NRZ by corresponding register in MDIO/MDC bus interface selection CDR module and modulates mould by MCU
Formula (step 208)；
Further, MCU judges whether to switch level of power consumption (step 205)；If host equipment instruction raises or lowers
Level of power consumption opens corresponding channel multichannel loading switch then to match the instruction level of power consumption (step in loopback test instruction
206)；And establish the network mapping (step 207) between input signal interface and output signal interface.Later, CDR module is controlled
PRBS31 (default) pattern can be used to send data packet under the driving of NRZ modulating mode.
The optical module for local loopback test of the various embodiments described above can be 8 according to QSFP-DD MSA protocol encapsulation
Channel, 200/400Gbps rate, hot-swappable, 76 pins transceiver configuration, single channel rate be 25Gbps or
50Gbps, initial modulation mode is NRZ, initial modulation mode when single channel rate is 50Gbps when single channel rate is 25Gbps
For PAM-4, target power consumption < 8W.
The optical module for local loopback test of the various embodiments described above can also be 4 logical according to CFP MSA protocol encapsulation
Road, 100Gbps rate, hot-swappable, 148 pins transceiver configuration, single channel rate 25Gbps, and single channel rate
Initial modulation mode is NRZ, target power consumption < 32W when for 25Gbps.
The optical module for local loopback test of the various embodiments described above can also be 4 logical according to CFP2MSA protocol encapsulation
Road, 100/200Gbps rate, hot-swappable, 96 pins transceiver configuration, single channel rate are 25Gbps or 50Gbps,
And single channel rate when being 25Gbps initial modulation mode be NRZ；Initial modulation mode is when single channel rate is 50Gbps
PAM-4, target power consumption < 12W.
The optical module for local loopback test of the various embodiments described above can also be 4 logical according to CFP4MSA protocol encapsulation
Road, 100/200Gbps rate, hot-swappable, 56 pins transceiver configuration, single channel rate are 25Gbps or 50Gbps,
And single channel rate when being 25Gbps initial modulation mode be NRZ；Initial modulation mode is when single channel rate is 50Gbps
PAM-4, target power consumption < 6W.
The optical module for local loopback test of the various embodiments described above can also be 8 logical according to CFP8MSA protocol encapsulation
Road, 400Gbps rate, hot-swappable, 124 pins transceiver configuration, single channel rate 50Gbps, and single channel rate
For 50Gbps, initial modulation mode is PAM-4, target power consumption < 18W.
The optical module for local loopback test of the various embodiments described above can also be 8 logical according to OSFP MSA protocol encapsulation
Road, 400Gbps rate, hot-swappable, 60 pins transceiver configuration, single channel rate 50Gbps, and single channel rate
For 50Gbps, initial modulation mode is PAM-4, target power consumption < 13W.
The STRUCTURE DECOMPOSITION that Fig. 3 shows the optical module according to an exemplary embodiment of the present invention for local loopback test is shown
It is intended to.Fig. 4 shows the optical module outline structural diagram according to an exemplary embodiment of the present invention for local loopback test.
The optical module of exemplary embodiment shown in Fig. 3 and Fig. 4 be according to QSFP-DD MSA protocol encapsulation, according to such as CFP, CFP2,
The optical module structure difference of the protocol encapsulations such as CFP4, CFP8, OSFP MSA is that package dimension, golden finger (interface, pin) are fixed
The difference of adopted and target power consumption etc..As shown in figure 3, the structural member of the optical module include pedestal 1, unlock piece drawstring 2, spring 3,
PCB component 4, LED light tube 5, protection plug 6, cover board 7 and screw 8.
Wherein, unlock piece drawstring 2 is connected with the solution locked groove on pedestal 1, and two springs 3 are respectively arranged in 1 two sides of pedestal
Solution locked groove and unlock piece drawstring 2 formed space in；Attenuator circuit ATT, CDR module, micro-control unit MCU, multi-channel control are opened
It closes and multiple load resistances is arranged on PCB component 4；The golden finger connection that LED light tube 5 and multiple interfaces are drawn
In PCB component 4；
The erecting bed for being caught in PCB component 4 is provided on pedestal 1, and 1 one end of pedestal is provided with for being caught in LED light tube 5
Circular trough to be fixed；Be each provided on pedestal 1 and cover board 7 the opposite screw hole at least four positions with by for
By screw 8 by the two combine fix；It can also include protection plug 6 for the device when being not used in protection optical module,
With combined with pedestal 1 and cover board 7 it is fixed after the matched structure in one end.It is as shown in Figure 4 to be installed an exemplary light module.
Optical module in above-described embodiment for local loopback test has been internally integrated while having supported PAM-4 and NRZ etc. to adjust
The CDR module of molding formula and corresponding balanced and forward error correction function, can either support PAM-4, NRZ modulating mode and corresponding expansion
Rate, and the high speed signal data and clock of decaying can be restored and compensated, to improve measuring accuracy；Ce circuit
Can support the standard application of 50Gbps and 25Gbps and following rate section, speed range cover Datacom,
Application standard including Infiniband, Fiber Channel etc..Simultaneously by the working condition of control CDR, can make
Loopback test module works under different modulating type and rate conditions, has widened the application environment of module；Also, it can lead to
Stored program control system selection different power consumption grade is crossed, the test environment under a variety of loading conditions can be simulated, mentioned for network equipment host
More tests have been supplied to select.
The above, the only detailed description of the specific embodiment of the invention, rather than limitation of the present invention.The relevant technologies
The technical staff in field is not in the case where departing from principle and range of the invention, various replacements, modification and the improvement made
It should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of optical module for local loopback test, which is characterized in that the optical module includes：It is encapsulated according to preset protocol
Multiple interfaces, attenuator circuit ATT, CDR module, micro-control unit MCU, multipath control switch and multiple load resistances；
Wherein, it is connected according to multiple interfaces of preset protocol encapsulation for interface corresponding with tested host equipment,
It is multiple for data packet to occur to host equipment including multiple input signal interfaces for from host equipment received data packet
Output signal interface, six power interfaces for powering to optical module, the I2C including data line SDA and clock cable SCL
Bus interface and the control of multiple states and instruction interface；Each input signal interface and output signal interface are disposed as list
Interface can be switched in the rate of channel 25Gbps or 50Gbps；Input signal interface is connected to CDR module via attenuator circuit ATT；
MCU is used to be arranged according to preset protocol the initialization modulating mode and level of power consumption of optical module；MCU passes through I2C bus
Interface is connect to receive the loopback test from host equipment and instruct and send diagnostic message to host equipment with host equipment, is led to
It crosses MDIO/MDC bus interface to connect with CDR module, and is connect by GPIO interface with multipath control switch；MCU is further used
The register in CDR module is arranged by MDIO/MDC bus interface to control CDR in information in being instructed according to loopback test
Module carries out signal modulation using PAM-4 modulating mode or NRZ modulating mode, and switches each input according to modulating mode and believe
The rate of number interface and output signal interface；
MCU is further used for being turned on or off according to identified modulating mode via GPIO interface control multipath control switch more
Corresponding load power consumption value is arranged to match the corresponding level of power consumption of preset protocol in one or more of a load resistance, and
The network mapping between input signal interface and output signal interface is established via MDIO/MDC bus interface control CDR module.
2. optical module according to claim 1, which is characterized in that the attenuator circuit ATT includes 8 π type attenuator circuits,
Each of these is made of 4 digital resistors, by the combination of different digital resistor, carries out different brackets to signal
Decaying.
3. optical module according to claim 1, which is characterized in that the CDR module includes sequentially connected continuous time
Linear equalizer CTLE, ce circuit and forward error correction FEC repeat circuit；
Multiple AC coupled capacitors are connected between the input terminal and output end of CDR module to filter out the direct current in high-frequency signal point
Amount.
4. optical module according to claim 1, which is characterized in that the optical module further comprises connecting via GPIO interface
It is connected to the temperature sensor, voltage collection circuit and multiple status indicator lamps of MCU.
5. optical module according to claim 4, which is characterized in that the MCU is used to pass through temperature sensor, voltage acquisition
Obtain to circuit period the real time temperature and supply voltage of optical module, and judge temperature and supply voltage whether optical module work
It is required in range；When operating temperature and operating voltage in the normal range when, optical module work normally, MCU state of a control
Indicator light display works normally information；When module operating temperature or supply voltage are more than job requirement range, MCU state of a control
Indicator light display alarm information, and cut off the power the power supply that interface connected by the control switch inside MCU, it is tested to protect
Host equipment and optical module.
6. optical module according to claim 1, which is characterized in that the MCU is further used for first according to loopback test
Instruction judges whether using PAM-4 modulating mode, if host equipment instruction using PAM-4 modulating mode and with initial modulation mode
It is identical, then not switch modulation mode；And further determine whether switching level of power consumption；If host equipment instruction raises or lowers
Level of power consumption, then MCU controls be turned on or off in multiple load resistances one or more of multipath control switch by GPIO interface
A instruction level of power consumption corresponding load power consumption value is arranged to match in loopback test instruction；It is being not required to carry out level of power consumption
Switching is completed after switching, and MCU establishes input signal interface via MDIO/MDC bus interface control CDR module and output is believed
Network mapping between number interface, and control CDR module and send data packet under the driving of PAM-4 modulating mode.
7. optical module according to claim 6, which is characterized in that if host equipment instruction uses NRZ modulating mode
And it is not identical as initial modulation mode, then MCU by MDIO/MDC bus interface select in CDR module corresponding register by
Modulating mode is switched to NRZ modulating mode；Further, MCU judges whether to switch level of power consumption；If host equipment instruction improves
Or reduce level of power consumption, then corresponding channel multichannel loading switch is opened to match the instruction power consumption etc. in loopback test instruction
Grade；And the network mapping between input signal interface and output signal interface is established, control CDR module can modulate mould in NRZ
Data packet is sent under the driving of formula.
8. optical module according to claim 1, which is characterized in that described to be connect according to each input signal of modulating mode switching
Mouthful and the rate of output signal interface include：By each input signal interface and output signal when using PAM-4 modulating mode
The rate of interface is switched to 50Gbps, by each input signal interface and output signal interface when using NRZ modulating mode
Rate is switched to 25Gbps.
9. optical module according to any one of claim 1 to 8, which is characterized in that the preset protocol be QSFP-DD,
One of CFP, CFP2, CFP4, CFP8, OSFP MSA agreement.
10. optical module according to claim 9, which is characterized in that the optical module structure part includes pedestal, unlock piece drawing
Band, spring, PCB component, LED light tube, cover board and screw；
Wherein, attenuator circuit ATT, CDR module, micro-control unit MCU, multipath control switch and multiple load resistances are all provided with
It sets in PCB component, the golden finger that LED light tube and multiple interfaces are drawn is connected to PCB component；It is provided with and is caught on pedestal
The erecting bed of PCB component, and pedestal one end is provided in the circular trough for being caught in LED light tube to be fixed；Pedestal and
The opposite screw hole at least four positions is each provided on cover board to fix by corresponding the two to be combined to screw.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110401490A (en) * | 2019-08-02 | 2019-11-01 | 东莞铭普光磁股份有限公司 | Support the level shifting circuit and level conversion method of MDIO communication |
| CN110855353A (en) * | 2019-11-19 | 2020-02-28 | 中电科仪器仪表有限公司 | Error code tester and test system suitable for various types of optical modules |
| CN113055247A (en) * | 2021-03-11 | 2021-06-29 | 中国人民解放军国防科技大学 | Multi-channel high-speed transceiver loopback test method and device for FPGA |
| CN113746540A (en) * | 2021-09-08 | 2021-12-03 | 迈矽科技(上海)有限公司 | QSFP-based variable power consumption high-speed loop test module |
| CN113740719A (en) * | 2021-09-02 | 2021-12-03 | 上海壁仞智能科技有限公司 | Chip and chip testing method |
| CN113826361A (en) * | 2019-03-21 | 2021-12-21 | 伊顿智能动力有限公司 | Bus configuration and method for operating a bus configuration |
| CN114076889A (en) * | 2021-11-18 | 2022-02-22 | 长江存储科技有限责任公司 | Test system and test method |
| CN115733549A (en) * | 2023-01-10 | 2023-03-03 | 苏州浪潮智能科技有限公司 | PCIE network card and switching method of interface modes thereof, electronic equipment and storage medium |
| CN116232467A (en) * | 2023-05-05 | 2023-06-06 | 深圳市飞思卓科技有限公司 | 200G optical module circuit, control method and interface |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60200352A (en) * | 1984-03-23 | 1985-10-09 | Fujitsu Ltd | Memory diagnosis system |
| US20040228627A1 (en) * | 2003-05-15 | 2004-11-18 | International Business Machines Corporation | Highly available redundant optical modules using single network connection |
| CN201398198Y (en) * | 2009-04-13 | 2010-02-03 | 成都新易盛通信技术有限公司 | XFP interface loopback test module |
| WO2010139144A1 (en) * | 2009-06-05 | 2010-12-09 | 中兴通讯股份有限公司 | Optical module and control method thereof |
| CN102255656A (en) * | 2011-06-16 | 2011-11-23 | 成都新易盛通信技术有限公司 | Optical network unit for passive optical network and signal processing method thereof |
| CN203722640U (en) * | 2014-03-03 | 2014-07-16 | 青岛海信宽带多媒体技术有限公司 | Electric loopback light module |
| CN104202092A (en) * | 2014-09-18 | 2014-12-10 | 长芯盛（武汉）科技有限公司 | Receiving, transmitting and controlling three-in-one chip applicable to SFP (small form-factor pluggable) + high-speed photoelectric communication |
| CN106301549A (en) * | 2016-09-30 | 2017-01-04 | 成都新易盛通信技术股份有限公司 | A kind of 100G loopback module based on QSFP28 encapsulation |
| CN107231319A (en) * | 2017-07-17 | 2017-10-03 | 西安微电子技术研究所 | A kind of gigabit networking control circuit based on AMBA ahb bus |
| EP3247056A1 (en) * | 2016-05-18 | 2017-11-22 | Hisense Broadband Multimedia Technologies Co., Ltd. | Optical module and optical line terminal device |
| US9838134B1 (en) * | 2015-05-07 | 2017-12-05 | Inphi Corporation | Off quadrature Mach-Zehnder modulator biasing |
| CN208581235U (en) * | 2018-08-28 | 2019-03-05 | 成都新易盛通信技术股份有限公司 | A kind of optical module for local loopback test |
-
2018
- 2018-08-28 CN CN201810989499.1A patent/CN108880674B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60200352A (en) * | 1984-03-23 | 1985-10-09 | Fujitsu Ltd | Memory diagnosis system |
| US20040228627A1 (en) * | 2003-05-15 | 2004-11-18 | International Business Machines Corporation | Highly available redundant optical modules using single network connection |
| CN201398198Y (en) * | 2009-04-13 | 2010-02-03 | 成都新易盛通信技术有限公司 | XFP interface loopback test module |
| WO2010139144A1 (en) * | 2009-06-05 | 2010-12-09 | 中兴通讯股份有限公司 | Optical module and control method thereof |
| CN102255656A (en) * | 2011-06-16 | 2011-11-23 | 成都新易盛通信技术有限公司 | Optical network unit for passive optical network and signal processing method thereof |
| CN203722640U (en) * | 2014-03-03 | 2014-07-16 | 青岛海信宽带多媒体技术有限公司 | Electric loopback light module |
| CN104202092A (en) * | 2014-09-18 | 2014-12-10 | 长芯盛（武汉）科技有限公司 | Receiving, transmitting and controlling three-in-one chip applicable to SFP (small form-factor pluggable) + high-speed photoelectric communication |
| US9838134B1 (en) * | 2015-05-07 | 2017-12-05 | Inphi Corporation | Off quadrature Mach-Zehnder modulator biasing |
| EP3247056A1 (en) * | 2016-05-18 | 2017-11-22 | Hisense Broadband Multimedia Technologies Co., Ltd. | Optical module and optical line terminal device |
| CN106301549A (en) * | 2016-09-30 | 2017-01-04 | 成都新易盛通信技术股份有限公司 | A kind of 100G loopback module based on QSFP28 encapsulation |
| CN107231319A (en) * | 2017-07-17 | 2017-10-03 | 西安微电子技术研究所 | A kind of gigabit networking control circuit based on AMBA ahb bus |
| CN208581235U (en) * | 2018-08-28 | 2019-03-05 | 成都新易盛通信技术股份有限公司 | A kind of optical module for local loopback test |
Non-Patent Citations (1)
| Title |
|---|
| 许朝蓬;: "QSFP28光模块应用的标准分析与测试技术研究", 自动化仪表, no. 08 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113826361A (en) * | 2019-03-21 | 2021-12-21 | 伊顿智能动力有限公司 | Bus configuration and method for operating a bus configuration |
| CN113826361B (en) * | 2019-03-21 | 2023-02-17 | 伊顿智能动力有限公司 | Bus configuration and method for operating a bus configuration |
| CN110401490A (en) * | 2019-08-02 | 2019-11-01 | 东莞铭普光磁股份有限公司 | Support the level shifting circuit and level conversion method of MDIO communication |
| CN110855353A (en) * | 2019-11-19 | 2020-02-28 | 中电科仪器仪表有限公司 | Error code tester and test system suitable for various types of optical modules |
| CN113055247A (en) * | 2021-03-11 | 2021-06-29 | 中国人民解放军国防科技大学 | Multi-channel high-speed transceiver loopback test method and device for FPGA |
| CN113055247B (en) * | 2021-03-11 | 2022-05-13 | 中国人民解放军国防科技大学 | Loopback test method and device for multi-channel high-speed transceiver of FPGA |
| CN113740719A (en) * | 2021-09-02 | 2021-12-03 | 上海壁仞智能科技有限公司 | Chip and chip testing method |
| CN113740719B (en) * | 2021-09-02 | 2024-05-14 | 上海壁仞科技股份有限公司 | Chip and chip testing method |
| CN113746540A (en) * | 2021-09-08 | 2021-12-03 | 迈矽科技(上海)有限公司 | QSFP-based variable power consumption high-speed loop test module |
| CN114076889A (en) * | 2021-11-18 | 2022-02-22 | 长江存储科技有限责任公司 | Test system and test method |
| CN115733549A (en) * | 2023-01-10 | 2023-03-03 | 苏州浪潮智能科技有限公司 | PCIE network card and switching method of interface modes thereof, electronic equipment and storage medium |
| CN116232467A (en) * | 2023-05-05 | 2023-06-06 | 深圳市飞思卓科技有限公司 | 200G optical module circuit, control method and interface |
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