CN110366058A - ONU port test circuit, device, system and method - Google Patents
ONU port test circuit, device, system and method Download PDFInfo
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- CN110366058A CN110366058A CN201910566082.9A CN201910566082A CN110366058A CN 110366058 A CN110366058 A CN 110366058A CN 201910566082 A CN201910566082 A CN 201910566082A CN 110366058 A CN110366058 A CN 110366058A
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- optical
- signal
- onu
- optical signal
- end mouth
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
- H04Q2011/0083—Testing; Monitoring
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses an ONU port test circuit, a device, a system and a method, which comprises a first optical interface, a wavelength division multiplexer, a photoelectric conversion module, a signal amplification module, a laser driver, a laser generator and an optical attenuator, wherein the first optical interface is connected with the wavelength division multiplexer, and the wavelength division multiplexer is connected with the photoelectric conversion module, the signal amplification module, the laser driver, the laser generator and the optical attenuator in a loop. The ONU port test circuit, the ONU port test device, the ONU port test system and the ONU port test method can simultaneously complete the transmission and reception performance test of the ONU port, have simple structure and greatly save optical fiber resources.
Description
Technical field
The present invention relates to the communications fields more particularly to a kind of ONU end mouth to test circuit, device, system and method.
Background technique
Nowadays, communication service high speed development, the requirement to broadband are continuously improved.PON (passive optical network) is as communication
If the light technology of weight lifting in network, broadband, efficient access features become major operator and carry out full-service operation
One of important means has obtained most attention.In PON network, the transmitting and reception of the ONU equipment port in client are believed
Number performance it is particularly important, nowadays for the performance test of ONU equipment port be broadly divided into emitting performance test and acceptance
It can test, when carrying out emitting performance test to port, need to connect attenuator and oscillograph, be sent out by the cpu module of ONU equipment
The test optical signal equipped with PRBS code sequence is penetrated, by attenuator to oscillograph, clock recovery is completed and data is restored, thus
Reach the emitting performance test to port；When carrying out receptivity test to port, need to connect Error Detector and attenuator, by
Error Detector sends the test optical signal equipped with PRBS code sequence to the port of ONU equipment, and the cpu module by ONU equipment is certainly
After inspection, the test to port receptivity is completed；I.e. nowadays the transmitting for ONU equipment port and receptivity test need
It connects different circuits and is completed using different instruments.
Since the light path design of ONU equipment is the design of single fiber bi-directional, transmitting and reception are believed using the light of different wavelength
Number (be such as emitted as the optical signal of 1310nm, and be received as the optical signal of 1490nm), in same root optical fiber, can not to port into
Row loopback test can not be completed at the same time the transmitting to ONU equipment port and the quick test of receptivity；And at present for
The transmitting of ONU equipment port and the test of receptivity need respectively using optical Oscilloscope and Error Detector, and test equipment is various, survey
Examination topology is complex, is not appropriate for research staff, tester and quickly, easily judges ONU equipment end in the actual environment
The transmitting and received performance of mouth.
Summary of the invention
In view of the above-mentioned problems, the purpose of the present invention is to provide one kind can measure the transmitting of ONU end mouth and acceptance simultaneously
Can and the relatively simple test circuit of test topology, device, system and method.
To achieve the goals above, one embodiment of the invention provides a kind of ONU end mouth test circuit comprising the first light
Interface, wavelength division multiplexer, photoelectric conversion module, signal amplification module, laser driver, laser generator and optical attenuator.
First optical interface, optic communication end are connect with the optic communication end of the wavelength division multiplexer, and for that will receive
To the ONU equipment of outside to send over be that the first optical signal of preset first wave length is sent to the wavelength division multiplexer.
The wavelength division multiplexer, optical signal transmitting terminal are connect with the receiving end of the photoelectric conversion module, and being used for will
First optical signal received is sent to the photoelectric conversion module.
The photoelectric conversion module, transmitting terminal amplifies with the signal and the receiving end of power detection module is connect, and
For first optical signal received to be converted to electric signal.
The signal amplification module, transmitting terminal are connect with the receiving end of the laser driver, and are used for the electricity
Signal amplifies and is sent to the laser driver.
The laser driver, transmitting terminal are connect with the receiving end of the laser generator, and being used for will be amplified
The electric signal is converted to driving signal and is sent to the laser generator.
The laser generator, transmitting terminal are connect with the receiving end of the optical attenuator, and for according to the driving
Signal generates the second optical signal of preset second wave length and occurs to the optical attenuator.
The optical attenuator, transmitting terminal is connect with the optical signal receiving end of the wavelength division multiplexer, and is used for institute
It states the second attenuated optical signal and is sent to the wavelength division multiplexer to predetermined extent and by second optical signal after decaying.
The wavelength division multiplexer is also used to second optical signal after decaying issuing first optical interface.
First optical interface, second optical signal after the decaying for being also used to receive are sent to the ONU and set
It is standby, so that the ONU equipment detects following according to second optical signal after first optical signal of sending and decaying
At least one of parameter: the optical receiver sensitivity of the ONU equipment, light emitting received signal quality.
As an improvement of the above scheme, the ONU end mouth test circuit further includes analog-to-digital conversion module, test side and institute
The transmitting terminal connection of photoelectric conversion module is stated, and for measuring according to the electric signal that the photoelectric conversion module sends over
The transmission power of the self-test optical signal of the external ONU equipment.
As an improvement of the above scheme, the photoelectric conversion module includes for turning first optical signal received
Be changed to the photodiode of electric signal, the photodiode be connected to the optical signal transmitting terminal of the wavelength division multiplexer with it is described
Between the receiving end of signal amplification module.
As an improvement of the above scheme, the signal amplification module includes for sending over the photoelectric conversion module
Electric signal be enlarged into the limiting amplifier of differential voltage signal, the limiting amplifier be connected to the photoelectric conversion module with
Between the laser driver.
As an improvement of the above scheme, the first wave length is 1310nm, and the second wave length is 1490nm.
As an improvement of the above scheme, first optical signal that the ONU equipment sends over carries PRBS code sequence
Column, first optical signal are also taken by second optical signal that ONU end mouth test circuit is returned to the ONU equipment
With PRBS code sequence, so that the ONU equipment is according to the PRBS code sequence of first optical signal of sending and the institute of return
The PRBS code sequence for stating the second optical signal detects the light emitting received signal quality of ONU equipment.
Another embodiment of the present invention provides a kind of ONU end mouth test devices comprising ONU end mouth test as described above
Circuit.
Yet another embodiment of the invention provides a kind of ONU end mouth test macro comprising ONU equipment and as described above
ONU end mouth test device；The ONU equipment is connect with first optical interface by optical fiber；
The ONU equipment, for issuing the first optical signal to the ONU end mouth test device and receiving the ONU end mouth
The second optical signal after the decaying that test device returns, and for according to after first optical signal of sending and decaying
Second optical signal detects at least one of following parameter: the optical receiver sensitivity of the ONU equipment, light emitting are received
Signal quality.
As an improvement of the above scheme, the ONU equipment includes processor, optical module and the second optical interface；The processing
Device is connect by the optical module with second optical interface, and second optical interface is connected by optical fiber and first optical interface
It connects.
The processor, the first optical signal for being produced as preset first wave length for controlling the optical module.
The optical module, for first optical signal generated to be sent to second optical interface.
Second optical interface, for first optical signal to be sent to first optical interface, and being used for will be described
The second optical signal after the decaying that first optical interface sends over is sent to the optical module.
The optical module is also used to second optical signal after decaying being converted to corresponding electric signal to be tested concurrent
Give the processor.
The processor is also used to detect at least one of following parameter: described according to the electric signal to be tested
The optical receiver sensitivity of ONU equipment, light emitting received signal quality.
Further embodiment of this invention provides ONU end mouth test method comprising:
Receive outside ONU equipment send over be preset first wave length the first optical signal；
First optical signal is converted into electric signal.
The electric signal is amplified.
The amplified electric signal is converted into driving signal.
The second optical signal that laser generator generates preset second wave length is controlled according to the driving signal.
By second attenuated optical signal to predetermined extent and second optical signal after decaying is sent to ONU sets
It is standby, so that the ONU equipment detects following according to second optical signal after first optical signal of sending and decaying
At least one of parameter: the optical receiver sensitivity of the ONU equipment, light emitting received signal quality.
ONU end mouth provided by the invention tests circuit, device, system and method, by the way that wavelength division multiplexer is added, by two kinds
Different wave length, carrying check information optical carrier merges together, and is coupled in the same root optical fiber of optical link, leads to
The transmission structure for crossing winding is transmitted, and is finally verified for further processing by the processor of ONU equipment.Whole process utilizes certainly
Hair, conversion, from receiving, be rapidly completed to the transmitting of ONU end mouth and the self-checking of receptivity parameter, without optical Oscilloscope and
The test equipments such as Error Detector, test topology structure is simple, and testing cost is lower, greatly improves testing efficiency, has saved light
Fine resource.
Detailed description of the invention
In order to illustrate more clearly of technical solution of the present invention, attached drawing needed in embodiment will be made below
Simply introduce, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of ONU end mouth test circuit provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of ONU end mouth test macro provided in an embodiment of the present invention；
Fig. 3 is a kind of flow diagram of ONU end mouth test method provided in an embodiment of the present invention；
Attached drawing marks explanation；
1. the first optical interface；2. wavelength division multiplexer；3. photoelectric conversion module；4. signal amplification module；5. laser driver；
6. laser generator；7. optical attenuator；8. analog-to-digital conversion module；9. processor；10. optical module；11. the second optical interface.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In the description of the embodiment of the present invention, it should be noted that it can be practiced in a distributed computing environment,
In these distributed computing environment, by executing task by the connected remote processing devices of communication network.In addition, this hair
It is bright to can be used for including in numerous general or special purpose computing device environment or configurations.Such as: personal computer, server calculate
Machine, handheld device or portable device, laptop device, multi-processor device, the distribution including any of the above devices or devices
Formula calculates environment etc..
In the description of the embodiment of the present invention, it is to be understood that term " first ", " second " and " third " be only used for by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or order or imply opposite importance.
One embodiment of the invention provides a kind of ONU end mouth test circuit, referring to Figure 1, tests circuit for ONU end mouth
Structural schematic diagram, specifically comprising the first optical interface 1, wavelength division multiplexer 2, photoelectric conversion module 3, signal amplification module 4,
Laser driver 5, laser generator 6 and optical attenuator 7.
In embodiments of the present invention, the optic communication end of first optical interface 1 in ONU end mouth test circuit and the wave
The optic communication end of division multiplexer 2 connects, and is preset first wave for sending over the ONU equipment of the outside received
The first long optical signal is sent to the wavelength division multiplexer；It should be noted that first optical interface 1 and second light connect
Mouthfuls 11 all can be ST, SC or FC fibre-optical splice ring flange, determined by specific ONU equipment；The wavelength division multiplexer
2, optical signal transmitting terminal is connect with the receiving end of the photoelectric conversion module 3, and for believing first light received
Number it is sent to the photoelectric conversion module 3, wherein the wavelength division multiplexer is the wavelength division multiplexer of high-isolation, there are high data
Optic communication rate；The photoelectric conversion module 3 is sent out for first optical signal received to be converted to electric signal
Sending end is connect with the receiving end of the signal amplification module 4, includes relevant serializer and deserializer by application, by the light
Electric conversion module is attached with signal amplification module；The signal amplification module 4, transmitting terminal and the laser driver 5
Receiving end connection, for the electric signal to be amplified and is sent to the laser driver 5；The laser driver 5,
For the amplified electric signal to be converted to driving signal and is sent to the laser generator 6, transmitting terminal with it is described
The receiving end of laser generator 6 connects；The laser generator 6, transmitting terminal are connect with the receiving end of the optical attenuator 7,
And it is used to generate the second optical signal of preset second wave length according to the driving signal and occurs to the optical attenuator 7；It is logical
The laser driver and the laser generator are crossed, the optical signal of corresponding wavelength can be regenerated, so that it is subsequent
ONU equipment is received and is verified, and certainly, relevant photoelectric coupling circuit can also be added, and guarantees that the transmission of signal will not be distorted,
Improve the efficiency of transmission；The optical attenuator 7, for by second attenuated optical signal to predetermined extent and by the institute after decaying
It states the second optical signal and is sent to the wavelength division multiplexer 2, the optical signal receiving end company of transmitting terminal and the wavelength division multiplexer 2
It connects, so that entire circuit is the structure of winding；The wavelength division multiplexer 2, by carrying out branch to different optical signals and closing
Second optical signal after decaying is issued back first optical interface 1 by road；First optical interface 1 is also used to receive
To decaying after second optical signal be sent to the ONU equipment so that the ONU equipment is according to described the first of sending
Second optical signal after optical signal and decaying, detects at least one of following parameter: the light-receiving of the ONU equipment
Sensitivity, light emitting received signal quality to judge the quality of signal transmission, and then evaluate the performance of ONU end mouth.
In embodiments of the present invention, by the way that wavelength division multiplexer is added, reasonable Arrangement tests circuit, so that the first optical interface connects
The self-test optical signal that the ONU equipment of receipts is sent is transmitted via wavelength division multiplexer, carries out photoelectric conversion to it by circuit, is converted
At corresponding electric signal, then after amplifying processing to it, corresponding light is converted back by laser driver and laser generator
Signal after carrying out power attenuation to it by attenuator later, is finally transmitted back to ONU with the first optical interface by wavelength division multiplexer and sets
For for its verification.Using the test circuit structure of winding, self-test can be carried out to the performance that sends and receives of ONU end mouth simultaneously
Test, test topology is simple, and testing efficiency has obtained great promotion.
It should be noted that in the above-described embodiments, the data flow process of signal are as follows: it is preset that ONU equipment, which is sent,
First optical signal of first wave length, using the wavelength-division multiplex technique of wavelength division multiplexer, first optical signal first passes around the wave
Division multiplexer is transmitted to photoelectric conversion module, the first optical signal is converted to electric signal by photoelectric conversion module, later the electricity
For signal using signal amplification module, the signal amplification module includes limiting amplifier, is used to provide the defeated of amplitude fixation
Level and integrated power detection function out, it is convenient that power detection is carried out to the electric signal；The electric signal is via described later
Laser driver generates corresponding laser-driven signal, and generates second optical signal by the laser generator is corresponding,
To complete the type of signal by optical signal to electric signal again to the transition process of optical signal；Finally by optical attenuator to described
Two optical signals carry out power attenuation, and the wide small ONU equipment that is equal to that decaying is dimensioned to output needs sensitivity to be achieved, tool
Body, it can also be adjustable attenuator that the optical attenuator, which can be fixed attenuator, and second optical signal after decaying passes through wave
Divide multiplexing technology to be transmitted back to the ONU equipment, so that optical signals ONU equipment originates, relies on wavelength-division multiplex technique, so that
Optical signal carries out branch and combining in test circuit, is finally transmitted back to ONU equipment, realizes transmitting and received loopback test
Process.
Preferably, in the above-described embodiments, the ONU end mouth test circuit further includes analog-to-digital conversion module 8, test side
It is connect with the transmitting terminal of the photoelectric conversion module 3, the electric signal that the photoelectric conversion module 3 generates is converted to corresponding number
Word signal makes it generate driving signal to generate corresponding optical signal, and is used for basis to trigger the laser driver 5
The electric signal that the photoelectric conversion module 3 sends over measures the transmitting function of the self-test optical signal of the external ONU equipment
Rate.
Preferably, in the above-described embodiments, the photoelectric conversion module includes for believing first light received
The photodiode (not shown) of electric signal number is converted to, the photodiode is connected to the optical signal of the wavelength division multiplexer
Between transmitting terminal and the receiving end of the signal amplification module.
Preferably, in the above-described embodiments, the signal amplification module includes for sending the photoelectric conversion module
The electric signal to come over is enlarged into the limiting amplifier (not shown) of differential voltage signal, and the limiting amplifier is connected to the light
Between electric conversion module and the laser driver, by the ADC detection function of the limiting amplifier, photodiode is turned
The electric signal of change carries out digital-to-analogue conversion, so as to monitor the size of ONU transmitting light.
Preferably, in the above-described embodiments, the first wave length is 1310nm, and the second wave length is 1490nm.It is different
The optical signal of wavelength is transmitted in same root optical fiber by the wavelength-division multiplex technique of wavelength division multiplexer.Certainly, the optical signal
It can also be determined just using other preset wavelengths by specific ONU equipment and test environment.
Preferably, in the above-described embodiments, first optical signal that the ONU equipment sends over carries PRBS code
Sequence, the PRBS code sequence are spontaneously generated by ONU equipment, and are loaded and transmitted on first optical signal, and described the
One optical signal also carries PRBS by second optical signal that ONU end mouth test circuit is returned to the ONU equipment
Code sequence, so that the ONU equipment is according to the PRBS code sequence of first optical signal of sending and second light of return
The PRBS code sequence of signal detects the light emitting received signal quality of ONU equipment.By PRBS code sequence, pass through winding
Test circuit complete the verifying of PRBS, the data after coding are compared with recently received data, judge PRBS
Verification correct errors, to obtain the transmitting and receptivity of ONU end mouth.It should be noted that in embodiments of the present invention, PRBS
Code sequence is as checking information, and the optical signal that ONU equipment is sent is carrier signal, and the PRBS code sequence is equipped on the light
On signal, transmitted by the winding of ONU end mouth test circuit, to initial PRBS code sequence and newly received PRBS code sequence into
Row compares, the verification of complete pair signals；Certainly, the type of the pseudo-random binary sequence of other forms can be used as to signal matter
The judging quota of amount cannot be limited the scope of protection of the present invention with this.
Another embodiment of the present invention provides a kind of ONU end mouth test device (not shown) comprising ONU as described above
Port test circuit.It should be noted that for device class embodiment, since it is substantially similar to above-described embodiment, institute
To be described relatively simple, related place illustrates referring to the part of above-described embodiment.
ONU end mouth test device provided in an embodiment of the present invention can be rapidly completed by the test circuit by winding
To ONU end mouth transmitting with receive self-checking, entire ONU end mouth test device power consumption with cost is relatively low, structure is simple, can
With the quick test under application on site different complex environments.
Further embodiment of this invention provides a kind of ONU end mouth test macro, specifically, referring to Fig. 2 comprising ONU
Equipment and ONU end mouth test device as described above；Wherein, the ONU equipment and first optical interface 1 are connected by optical fiber
It connects.
The ONU equipment, port are used to issue described in the first optical signal and reception to the ONU end mouth test device
The second optical signal after the decaying that ONU end mouth test device returns, and for according to first optical signal of sending and decaying
Second optical signal afterwards, detects at least one of following parameter: optical receiver sensitivity, the light hair of the ONU equipment
Penetrate received signal quality.
Preferably, in the above-described embodiments, the ONU equipment includes processor 9, optical module 10 and the second optical interface 11；
The processor 9 connect by the optical module 10 with second optical interface 11, second optical interface 11 pass through optical fiber and
First optical interface 1 connects.
The processor 9, the first optical signal for being produced as preset first wave length for controlling the optical module 10, packet
Include CPU or other data microprocessors.
The optical module 10 is sent to institute for generating first optical signal, and by first optical signal of generation
State the second optical interface 11.
Second optical interface 11 for first optical signal to be sent to first optical interface 1, and is used for institute
The second optical signal after stating the decaying that the first optical interface 1 sends over is sent to the optical module 10；
The optical module 10 is also used to second optical signal after decaying being converted to corresponding electric signal to be tested simultaneously
It is sent to the processor 9, so that it carries out the inspection and processing of data.
The processor 9 is also used to detect at least one of following parameter: institute according to the electric signal to be tested
Optical receiver sensitivity, the light emitting received signal quality for stating ONU equipment, by the inspection to signal parameter, to judge
The transmitting and receptivity of ONU end mouth.
ONU end mouth test macro provided in an embodiment of the present invention passes through ONU end mouth by the spontaneous optical signal of ONU equipment
Test device carries out winding transmission and processing to it, then carries out reception and checking treatment by ONU equipment, believes so as to complete to light
Number spontaneous and self-test, test system structure is simple, while realizing the transmitting to ONU end mouth and the inspection of receptivity, makes
Obtain port test efficiency significant increase.
Yet another embodiment of the invention provides a kind of ONU end mouth test method, specifically, referring to Fig. 3 comprising:
S101, receive external ONU equipment and send over be preset first wave length the first optical signal；
First optical signal is converted to electric signal by S102；
S103 amplifies the electric signal；
The amplified electric signal is converted to driving signal by S104；
S105 controls the second optical signal that laser generator generates preset second wave length according to the driving signal；
S106 is sent to by second attenuated optical signal to predetermined extent and by second optical signal after decaying
ONU equipment, so that the ONU equipment is according to second optical signal after first optical signal of sending and decaying, detection
At least one of following parameter out: the optical receiver sensitivity of the ONU equipment, light emitting received signal quality.This implementation
The ONU end mouth test method that example provides carries out photoelectric conversion by the optical signal sent to ONU equipment and signal amplifies, triggering
Laser driver driving generates corresponding optical signal, then carries out corresponding power attenuation to it, is received by ONU equipment, complete
Transmitted at the winding of signal, entire method flow is easy to operate, convenient and efficient, can be realized simultaneously the transmitting to ONU end mouth with
Received performance test.
ONU end mouth provided by the invention tests circuit, device, system and method, by the way that wavelength division multiplexer is added, by two kinds
Different wave length, carrying check information optical carrier merges together, and is coupled in the same root optical fiber of optical link, leads to
The transmission structure for crossing winding is transmitted, and is finally verified for further processing by the processor of ONU equipment.Whole process utilizes certainly
Hair, conversion, from receiving, be rapidly completed to the transmitting of ONU end mouth and the self-checking of receptivity parameter, without optical Oscilloscope and
The test equipments such as Error Detector, test topology structure is simple, and testing cost is lower, greatly improves testing efficiency, has saved light
Fine resource.
Above disclosed is only some preferred embodiments of the present invention, cannot limit the power of the present invention with this certainly
Sharp range, those skilled in the art can understand all or part of the processes for realizing the above embodiment, and weighs according to the present invention
Benefit requires made equivalent variations, still belongs to the scope covered by the invention.
Detailed Jie has been carried out to a kind of ONU end mouth test circuit provided by the present invention, device, system and method above
It continues, principle and implementation of the present invention are described for specific embodiment used herein, the explanation of above embodiments
It is merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, according to this
The thought of invention, there will be changes in the specific implementation manner and application range, in conclusion the content of the present specification is not answered
It is interpreted as limitation of the present invention.
Claims (10)
1. a kind of ONU end mouth tests circuit characterized by comprising the first optical interface, wavelength division multiplexer, photoelectric conversion module,
Signal amplification module, laser driver, laser generator and optical attenuator；
First optical interface, optic communication end are connect with the optic communication end of the wavelength division multiplexer, and be used to receive
It is that the first optical signal of preset first wave length is sent to the wavelength division multiplexer that external ONU equipment, which sends over,；
The wavelength division multiplexer, optical signal transmitting terminal are connect with the receiving end of the photoelectric conversion module, and for that will receive
To first optical signal be sent to the photoelectric conversion module；
The photoelectric conversion module, transmitting terminal amplifies with the signal and the receiving end of power detection module is connect, and is used for
First optical signal received is converted into electric signal；
The signal amplification module, transmitting terminal are connect with the receiving end of the laser driver, and are used for the electric signal
It amplifies and is sent to the laser driver；
The laser driver, transmitting terminal are connect with the receiving end of the laser generator, and being used for will be amplified described
Electric signal is converted to driving signal and is sent to the laser generator；
The laser generator, transmitting terminal are connect with the receiving end of the optical attenuator, and for according to the driving signal
It generates the second optical signal of preset second wave length and occurs to the optical attenuator；
The optical attenuator, transmitting terminal is connect with the optical signal receiving end of the wavelength division multiplexer, and for by described the
Two attenuated optical signals are sent to the wavelength division multiplexer to predetermined extent and by second optical signal after decaying；
The wavelength division multiplexer is also used to second optical signal after decaying issuing first optical interface；
First optical interface, second optical signal after the decaying for being also used to receive are sent to the ONU equipment, with
Make the ONU equipment according to second optical signal after first optical signal of sending and decaying, detects following parameter
At least one of: the optical receiver sensitivity of the ONU equipment, light emitting received signal quality.
2. ONU end mouth according to claim 1 tests circuit, which is characterized in that it further include analog-to-digital conversion module, detection
End is connect with the transmitting terminal of the photoelectric conversion module, and the telecommunications for being sended over according to the photoelectric conversion module
Number measure the transmission power of the self-test optical signal of the external ONU equipment.
3. ONU end mouth according to claim 1 tests circuit, which is characterized in that the photoelectric conversion module includes being used for
First optical signal received is converted to the photodiode of electric signal, the photodiode is connected to the wavelength-division
Between the optical signal transmitting terminal of multiplexer and the receiving end of the signal amplification module.
4. ONU end mouth according to claim 1 tests circuit, which is characterized in that the signal amplification module includes being used for
The electric signal that the photoelectric conversion module sends over is enlarged into the limiting amplifier of differential voltage signal, the limited range enlargement
Device is connected between the photoelectric conversion module and the laser driver.
5. ONU end mouth according to claim 1 tests circuit, which is characterized in that the first wave length is 1310nm, described
Second wave length is 1490nm.
6. ONU end mouth according to claim 1 tests circuit, which is characterized in that the ONU equipment sends over described
First optical signal carries PRBS code sequence, and first optical signal tests circuit to the ONU equipment by the ONU end mouth
Second optical signal returned also carries PRBS code sequence, so that the ONU equipment is believed according to first light of sending
Number PRBS code sequence and return second optical signal PRBS code sequence, detect that the light emitting of ONU equipment is received
Signal quality.
7. a kind of ONU end mouth test device, which is characterized in that tested including ONU end mouth as claimed in any one of claims 1 to 6
Circuit.
8. a kind of ONU end mouth test macro, which is characterized in that surveyed including ONU equipment and ONU end mouth as claimed in claim 7
Trial assembly is set；The ONU equipment is connect with first optical interface by optical fiber；
The ONU equipment, for issuing the first optical signal to the ONU end mouth test device and receiving the ONU end mouth test
The second optical signal after the decaying that device returns, and for according to described second after first optical signal of sending and decaying
Optical signal detects at least one of following parameter: the optical receiver sensitivity of the ONU equipment, light emitting received signal
Quality.
9. ONU end mouth test macro according to claim 8, which is characterized in that the ONU equipment includes processor, light
Module and the second optical interface；The processor is connect by the optical module with second optical interface, second optical interface
It is connect by optical fiber with first optical interface；
The processor, the first optical signal for being produced as preset first wave length for controlling the optical module；
The optical module, for first optical signal generated to be sent to second optical interface；
Second optical interface for first optical signal to be sent to first optical interface, and is used for described first
The second optical signal after the decaying that optical interface sends over is sent to the optical module；
The optical module is also used to second optical signal after decaying being converted to corresponding electric signal to be tested and be sent to
The processor；
The processor is also used to detect at least one of following parameter: the ONU according to the electric signal to be tested
The optical receiver sensitivity of equipment, light emitting received signal quality.
10. a kind of ONU end mouth test method characterized by comprising
Receive outside ONU equipment send over be preset first wave length the first optical signal；
First optical signal is converted into electric signal；
The electric signal is amplified；
The amplified electric signal is converted into driving signal；
The second optical signal that laser generator generates preset second wave length is controlled according to the driving signal；
It is sent to ONU equipment by second attenuated optical signal to predetermined extent and by second optical signal after decaying, with
Make the ONU equipment according to second optical signal after first optical signal of sending and decaying, detects following parameter
At least one of: the optical receiver sensitivity of the ONU equipment, light emitting received signal quality.
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