CN106209243B - relay optical module - Google Patents
relay optical module Download PDFInfo
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- CN106209243B CN106209243B CN201610538462.8A CN201610538462A CN106209243B CN 106209243 B CN106209243 B CN 106209243B CN 201610538462 A CN201610538462 A CN 201610538462A CN 106209243 B CN106209243 B CN 106209243B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- 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
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Abstract
The invention discloses a kind of relaying optical modules, belong to technical field of optical fiber communication.Including the first photo detecting unit, the first electric signal processing unit, the first clock data recovery unit and the first light emitting unit, the first photo detecting unit converts discrete first electric signal for the first optical signal for receiving discrete first optical signal；First electric signal processing unit is used to convert continuous second electric signal for the first electric signal；First clock data recovery unit is used to carry out clock and data recovery to the second electric signal to obtain third electric signal；First light emitting unit is used to issue continuous second optical signal according to third electric signal.By carrying out clock and data recovery processing again after carrying out continuous treatment to discrete first optical signal, so that the clock data recovery unit moment is in normal operating conditions, realize the clock and data recovery to optical signal, while ensure that long distance transmission, it is ensured that the reception accuracy of optical signal.
Description
Technical field
The present invention relates to technical field of optical fiber communication, in particular to a kind of relaying optical module.
Background technique
With the development of Fibre Optical Communication Technology, system is by PON (Passive Optical Network, passive optical network)
Through being widely used.It is as shown in Figure 1 the structural schematic diagram of PON system in the prior art, including OLT (Optical Line
Terminal, optical line terminal), optical splitter and multiple ONU (Optical Network Unit, optical network unit).Wherein,
Optical splitter includes a public port and 2N drop two port, for the received optical signal all the way of public port to be divided into the road 2N light letter
Number.OLT is set to central office, connect with the public port of optical splitter；Multiple ONU are set to user terminal, each ONU and optical splitter
A drop two port connection.In PON system, optical signal is transmitted to the uplink that OLT is optical signal from ONU, in optical signal
Uplink during, ONU generallys use burst transmissions mode, emits discrete optical signal, discrete optical signal
OLT is transmitted to by optical splitter.
There may be following problems during realizing the prior art:
Since optical signal can generate phase offset during long distance transmission, to enable receiving end to normally receive
Optical signal need to carry out phase recovery to the optical signal that phase offset occurs, and can not emit in the prior art ONU discontinuous
Optical signal carry out phase recovery and so that the transmission range of optical signal is up to 20 kms limit the transmission range of optical signal.
Summary of the invention
In order to solve problems in the prior art, this application provides a kind of relaying optical modules.The technical solution is as follows:
In a first aspect, provide a kind of relaying optical module, including the first photo detecting unit, the first electric signal processing unit,
First clock data recovery unit and the first light emitting unit,
First photo detecting unit converts first optical signal to for receiving discrete first optical signal
It exports after discrete first electric signal to first electric signal processing unit；
First electric signal processing unit will for converting continuous second electric signal for first electric signal
Second electric signal is exported to first clock data recovery unit；
First clock data recovery unit obtains for carrying out clock and data recovery to second electric signal
Three electric signals export the third electric signal to first light emitting unit；
First light emitting unit is used to issue continuous second optical signal according to the third electric signal.
Technical solution provided in an embodiment of the present invention has the benefit that
Since clock data recovery unit can only carry out clock recovery to continuous signal, by discrete first
Optical signal carries out clock and data recovery processing after carrying out continuous treatment again, so that the clock data recovery unit moment is in normal
Working condition realizes the clock and data recovery to optical signal, while ensure that long distance transmission, it is ensured that optical signal connects
Receive accuracy.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of structural schematic diagram of passive optical network in the prior art；
Fig. 2 is a kind of structural schematic diagram of passive optical network provided in an embodiment of the present invention；
Fig. 3 A is a kind of structural schematic diagram for relaying optical module 203 provided in an embodiment of the present invention；
Fig. 3 B is a kind of signal contrast schematic diagram being inserted into before and after idle code stream provided in an embodiment of the present invention；
Fig. 3 C is a kind of signal contrast schematic diagram removed before and after idle code stream provided in an embodiment of the present invention；
Fig. 3 D is a kind of structural schematic diagram for relaying optical module 203 provided in an embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram of passive optical network provided in an embodiment of the present invention；
Fig. 5 A is the structural schematic diagram of first relaying optical module 203a provided in an embodiment of the present invention a kind of；
Fig. 5 B is the detailed construction schematic diagram of first relaying optical module 203a provided in an embodiment of the present invention a kind of；
Fig. 6 A is the structural schematic diagram of second relaying optical module 203b provided in an embodiment of the present invention a kind of；
Fig. 6 B is the detailed construction schematic diagram of second relaying optical module 203b provided in an embodiment of the present invention a kind of.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
In order to which preferably the embodiment of the present invention is explained, before relaying optical module is introduced, first to this
The application scenarios of inventive embodiments are simply introduced, and Fig. 2 is detailed in.
Fig. 2 is a kind of structural schematic diagram of passive optical network provided in an embodiment of the present invention, referring to fig. 2, system packet
Include OLT 201, optical splitter 202, relaying optical module 203 and ONU 204.
Wherein, optical splitter 202 includes public port and multiple drop two ports.The public port and OLT 201 of optical splitter 202 connect
It connects, any drop two port 2021 of optical splitter 202 is connect with relaying optical module 203, and relaying optical module 203 is connect with ONU 204.
The transmission process of optical signal includes downlink transmission process and uplink process in the passive optical network.Under
OLT 201 emits continuous optical signal in row transmission process, and during uplink, ONU 204 emits discrete light letter
Number, as shown in Figure 2.In order to improve the signal transmission distance between ONU 204 and OLT 201, the embodiment of the present invention is in optical splitter
Relaying optical module is increased between 202 and ONU 204, to carry out power compensation to optical signal.Divide in passive optical network
The corresponding optical path all the way of each drop two port of light device 202, the embodiment of the present invention is only with optical path all the way indicated by drop two port 2021
For be introduced, relaying optical module can also be increased between the corresponding ONU 204 of other drop two ports of optical splitter 202, this
Inventive embodiments are not especially limited this.
Fig. 3 A is a kind of structural schematic diagram for relaying optical module 203 provided in an embodiment of the present invention, referring to Fig. 3 A, the relaying
Optical module include the first photo detecting unit 2031, the first electric signal processing unit 2032, the first clock data recovery unit 2033,
First light emitting unit 2034 and the second electric signal processing unit 2035.
Wherein, the first photo detecting unit 2031 converts the first optical signal to for receiving discrete first optical signal
It exports after discrete first electric signal to the first electric signal processing unit 2032.First optical signal can be by passive optical network system
The ONU 204 connecting in system with relaying optical module 203 emits, which includes multiple burst packets, any two
There is certain time interval between adjacent burst packet.
First electric signal processing unit 2032, for converting continuous second electric signal for the first electric signal, by second
Electric signal is exported to the first clock data recovery unit 2033.First clock data recovery unit 2033, for the second telecommunications
Number carry out clock and data recovery, third electric signal is obtained, by the third electric signal transmission to the second electric signal processing unit 2035.
In order not to change the original discontinuous feature of first optical signal, second signal processing unit 2035, for turning third electric signal
Discrete 4th electric signal is turned to, the 4th electric signal is exported to the first light emitting unit 2034, by the first light emitting unit
2034 issue discrete first optical signal according to the third electric signal, to pass first optical signal by optical splitter 202
OLT 201 is transported to, to realize the transmission of optical signal.
Wherein, the first photo detecting unit 2031 includes electrooptical device and amplitude limiting amplifier circuit.The electrooptical device
For discrete first optical signal to be converted into after electric signal output to amplitude limiting amplifier circuit, the amplitude limiting amplifier circuit for pair
The electric signal received amplifies processing, obtains discrete first electric signal.First light emitting unit 2034 includes laser
Device and its driving circuit, driving circuit are converted into electric current electricity by voltage electric signal for that will receive discrete 4th electric signal
To laser, laser is used to the 4th electric signal being converted into discrete first optical signal for output after signal.The driving circuit
It can be the non-continuous mode driving circuit of optical signal.Wherein, electrooptical device can be photodiode, such as APD
(Avalanche Photo Diode, avalanche photodide) etc..The present invention is not especially limit this.
Wherein, treatment process of first electric signal processing unit 2032 to the first electric signal are as follows: inserted in the first electric signal
Enter idle code stream, obtains continuous second electric signal.It that is to say and discrete first electric signal is converted into continuous second electricity
Signal, to carry out clock and data recovery to continuous second electric signal.Specifically, in the first electric signal processing unit 2032
It is previously stored with pre-arranged code rule, for discrete first electric signal, when detecting does not have signal, generation meets default
The idle code stream of coding rule, and the free time code stream is inserted into this there is no the period of signal.If having detected signal,
It is not inserted into idle code stream.
The pre-arranged code rule can be preset or be changed, for example, the pre-arranged code rule can be continuous
010101 coding etc., the present invention is not especially limit this.Signal to be inserted into before and after idle code stream as shown in Figure 3B
Contrast schematic diagram.Fpga chip can be used to realize the function of being inserted into idle code stream in first electric signal processing unit 2032, is somebody's turn to do
Fpga chip can be high speed fpga chip.Alternatively, the first electric signal processing unit 2032 is had using other is inserted into idle code stream
Chip realize the function of removing idle code stream, the present invention is not especially limit this.
Wherein, treatment process of second electric signal processing unit 2035 to third electric signal are as follows: examined in third electric signal
The idle code stream for surveying insertion, the bell idles diffluence that will test remove, and obtain discrete 4th electric signal.Specifically, the second electricity
Pre-arranged code rule can be stored in advance in signal processing unit 2035, after receiving third electric signal, detect the third electric signal
In whether comprising meeting the idle code stream of pre-arranged code rule, if comprising removing the free time code stream and going as shown in Figure 3 C
Except the signal contrast schematic diagram before and after idle code stream.Wherein, it is real that fpga chip can be used in the second electric signal processing unit 2035
The function of idle code stream is now removed, which can be high speed fpga chip.Alternatively, the second electric signal processing unit 2035 is adopted
Have the function of that the chip for removing idle code stream removes idle code stream to realize with other, the embodiment of the present invention is not made this specifically
It limits.
It should be noted that due in long distance transmission optical signal can generate dispersion, lead to phase offset, it is therefore desirable to
Clock and data recovery is carried out to optical signal, to guarantee that transmitting terminal is synchronous with the signal phase of receiving end.In embodiments of the present invention,
The clock and data recovery of optical signal is realized using the first clock data recovery unit 2033.With the first clock data recovery unit
For 2033 realize clock and data recovery function using CDR (Clock Data Recovery, clock and data recovery) chip, by
It is converted by off working state to working condition in CDR chip and needs certain locking time, usually Millisecond.And the first light is believed
Number multiple burst packets in, the time interval of the adjacent burst packet of any two is very short, usually nanosecond, far
Much smaller than the locking time of CDR chip, so that CDR chip cisco unity malfunction, and then cannot achieve clock and data recovery.This hair
Bright embodiment by carrying out clock and data recovery processing after carrying out continuous treatment to the first optical signal again, so that clock data
The recovery unit moment is in normal operating conditions, by clock and data recovery treated continuous signal but also converts back discrete not only
Signal, while ensure that long distance transmission, it is ensured that the reception accuracy of optical signal.
Above content is the process for relaying optical module 203 and being handled the discrete optical signal emitted of ONU 204,
It is the process handled the optical signal of uplink.The company that the relaying optical module 203 can also emit OLT 201
Continuous optical signal is handled.Correspondingly, referring to Fig. 3 D relaying optical module 203 further include: the second photo detecting unit 2036,
Two clock data recovery units 2037 and the second light emitting unit 2038.
Wherein, the second photo detecting unit 2036 is for receiving continuous third optical signal, converts for third optical signal
It exports after five electric signals to second clock data recovery unit 2037；Second clock data recovery unit 2037 is used for the 4th electricity
Signal carries out clock and data recovery, and the 5th electric signal after clock and data recovery is exported to the second light emitting unit 2038；The
Two light emitting units 2038 are used to issue the 4th optical signal according to the 5th electric signal.
Wherein, the second photo detecting unit 2036 includes electrooptical device and amplitude limiting amplifier circuit.The electrooptical device
For output after continuous third optical signal is converted into electric signal to amplitude limiting amplifier circuit, the amplitude limiting amplifier circuit is for docking
The electric signal received amplifies processing, obtains the 5th electric signal.Second light emitting unit 2038 includes laser and its driving
Circuit, driving circuit are exported for that will receive after the 4th electric signal is converted into current electrical signal by voltage electric signal to laser
Device, laser are used to the 4th electric signal being converted into the 4th optical signal.The driving circuit can drive for the continuous mode of optical signal
Dynamic circuit.Wherein, electrooptical device can be photodiode, such as APD etc..The embodiment of the present invention does not limit this specifically
It is fixed.
Embodiment shown in above-mentioned Fig. 2 and Fig. 3 A is by carrying out clock and data recovery to optical signal to realize over long distances
Transmission, in order to further improve the transmission range of optical signal, on the basis of carrying out clock and data recovery to optical signal, this hair
Bright embodiment can also carry out wavelength convert to optical signal, to reduce the power loss of optical signal in transmission process, in this kind of feelings
Under condition, the clock and data recovery function after optical module 203 among the above need to be realized using two relaying optical modules.Of the invention real
Applying two relaying optical modules of this in example is the first relaying optical module 203a and the second relaying optical module 203b, in the case of this kind, nothing
The structure of source optical-fiber network is detailed in Fig. 4, and the specific introduction of the first relaying optical module 203a and the second relaying optical module 203b are joined respectively
See Fig. 5 A and Fig. 6 A.
Fig. 4 is a kind of structural schematic diagram of passive optical network provided in an embodiment of the present invention, referring to fig. 4, system packet
Include OLT 201, optical splitter 202, first relays the relaying of optical module 203a and second optical module 203b and ONU 204.
Wherein, optical splitter 202 includes public port and multiple drop two ports.The public port and OLT 201 of optical splitter 202 connect
It connects, any drop two port 2021 of optical splitter 202 is connect with the second relaying optical module 203b, the second relaying optical module 203b and first
Optical module 203a connection is relayed, the first relaying optical module 203a is connect with ONU204.
In order to improve the signal transmission distance between ONU 204 and OLT 201, the embodiment of the present invention optical splitter 202 with
The relaying optical module 203b of the first relaying optical module 203a and second is increased between ONU 204, to carry out clock number to optical signal
Wavelength convert is carried out according to recovery, while to optical signal, to reduce the power loss of optical signal in transmission process.
It should be noted that the wavelength for the downlink optical signal that usually OLT 201 emits in PON system is 1490 nanometers
(nm).The wavelength for the uplink optical signal that ONU 204 emits is 1310 nanometers.This 1490 nanometers and 1310 nanometers of optical signal is in length
It is lost in Distance Transmission very greatly, so that the distance between optical splitter 202 and ONU 204 are limited within 20 kms.Specific
In implementation, on the basis of carrying out clock and data recovery to optical signal, the first relaying optical module 203a can will receive ONU 204
Uplink optical signal be converted into the optical signal of specified wavelength after be transmitted to the second relaying optical module 203b；Second relaying optical module
The downlink optical signal for receiving OLT 201 can be converted into being transmitted to the first relaying optical module after the optical signal of specified wavelength by 203b
203a.It that is to say, the wavelength of the optical signal transmitted between the first relaying optical module 203a and the second relaying optical module 203b is
Specified wavelength.Wherein, power loss of the optical signal with specified wavelength in transmission process, receives less than 1490 nanometers and 1310
The power loss of the optical signal of rice.The specified wavelength can be 1550 nanometers, or be less than for the loss of other long distance transmissions
The wavelength of 1490 nanometers and 1310 nanometers of optical signal, the present invention is not especially limit this.By to optical signal
Carry out clock and data recovery on the basis of, to optical signal carry out wavelength conversion so that between optical splitter 202 and ONU 204 away from
From 80 kms are extended to, transmission range is substantially increased.
Fig. 5 A is the structural schematic diagram of first relaying optical module 203a provided in an embodiment of the present invention a kind of, referring to Fig. 5 A,
It include: the first photo detecting unit 2031, the first electric signal processing unit 2032, the first clock data recovery unit 2033, first
Light emitting unit 2034, the second photo detecting unit 2036, second clock data recovery unit 2037 and the second light emitting unit
2038。
Wherein, the first photo detecting unit 2031 is connect with ONU 204, and the first electric signal processing unit 2032 and the first light are visited
It surveys unit 2031 to connect, the first clock data recovery unit 2033 is connect with the first electric signal processing unit 2032, the first light hair
It penetrates unit 2034 to connect with the first clock data recovery unit 2033, the connection of the first light emitting unit 2034 also relays light with second
Module 203b connection.Second photo detecting unit 2036 is connect with the second relaying optical module 203b, second clock data recovery unit
2037 connect with the second photo detecting unit 2036, and the second light emitting unit 2038 connects with second clock data recovery unit 2037
It connects, the second light emitting unit 2038 is also connect with ONU 204.
Optical mode is relayed to first respectively below for the uplink process and downlink transmission process of passive optical network
The function of each section is explained in block 203a.
One, the first relaying optical module 203a is in the treatment process of the uplink optical signal to the ONU 204 received, each portion
Divide function as follows:
First photo detecting unit 2031 converts non-company for the first optical signal for receiving discrete first optical signal
It exports after the first continuous electric signal to the first electric signal processing unit 2032；First electric signal processing unit 2032, for by the
One electric signal is converted into continuous second electric signal, and the second electric signal is exported to the first clock data recovery unit 2033；The
One clock data recovery unit 2033 obtains third electric signal, for carrying out clock and data recovery to the second electric signal to eliminate
The phase offset as caused by long distance transmission guarantees that signal is synchronous, third electric signal is exported to the first light emitting unit
2034；First light emitting unit 2034 is used to issue continuous second optical signal according to third electric signal, by this continuous second
Optical signal transmission to second relaying optical module 203b.
Wherein, the first photo detecting unit 2031 includes electrooptical device and amplitude limiting amplifier circuit.The electrooptical device
For discrete first optical signal to be converted into after electric signal output to amplitude limiting amplifier circuit, the amplitude limiting amplifier circuit for pair
The electric signal received amplifies processing, obtains discrete first electric signal.First light emitting unit 2034 includes laser
Device and its driving circuit, the driving circuit are converted into electric current electricity by voltage electric signal for that will receive continuous third electric signal
Signal, so that third electric signal is converted into the second optical signal by laser.The driving circuit can be the continuous mode of optical signal
Driving circuit.Wherein, electrooptical device can be photodiode, such as APD etc..The embodiment of the present invention does not limit this specifically
It is fixed.
Wherein, discrete first electric signal is converted into continuous second electric signal by the first electric signal processing unit 2032
Process, discrete first electric signal converted with the first electric signal processing unit 2032 in relaying optical module shown in Fig. 3 A
At continuous second electric signal process similarly, details are not described herein.
It wherein, may include CDR chip in the first clock data recovery unit 2033, the clock data for realizing signal is extensive
Multiple function, alternatively, the first clock data recovery unit 2033 is realized using other chips with clock and data recovery function
The clock and data recovery of signal, the present invention is not especially limit this.
In another embodiment, if the distance between ONU201 and the first relaying optical module 203a are shorter, so that light is believed
Number phase offset will not be generated during transmission, then without carrying out clock to optical signal in the first relaying optical module 203a
Data are restored, then the first relaying optical module 203a can not include the first clock data recovery unit 2033, the embodiment of the present invention pair
This is not especially limited.
It should be noted that the wavelength of above-mentioned second optical signal is specified wavelength, specified wavelength is different from the first optical signal
Wavelength.In transmission process, the power attenuation of the power attenuation of the second optical signal of the specified wavelength less than the first optical signal.
The specified wavelength can be 1550 nanometers, or the wavelength for the decaying of other signal powers less than the first optical signal, the present invention are implemented
Example is not especially limited this.
Two, the first relaying optical module 203a is to the processed of the downlink optical signal of the second relaying optical module 203b received
Cheng Zhong, functions are as follows:
Second photo detecting unit 2036 converts the 5th telecommunications for third optical signal for receiving continuous third optical signal
It exports after number to second clock data recovery unit 2037.The third optical signals second relaying optical module 203b will be received
It is sent after the 4th optical signal conversion that OLT 201 emits.Second clock data recovery unit 2037 be used for the 4th electric signal into
Row clock data are restored, and the 5th electric signal after clock and data recovery is exported to the second light emitting unit 2038；Second light hair
Unit 2038 is penetrated for issuing the 4th optical signal according to the 5th electric signal.
Wherein, the second photo detecting unit 2036 includes electrooptical device and amplitude limiting amplifier circuit.The photoelectricity fills parallel operation part
For output after continuous third optical signal is converted into electric signal to amplitude limiting amplifier circuit, the amplitude limiting amplifier circuit is for docking
The electric signal received amplifies processing, obtains the 5th electric signal.Second light emitting unit 2038 includes laser and its driving
Circuit, driving circuit are exported for that will receive after the 4th electric signal is converted into current electrical signal by voltage electric signal to laser
Device, laser are used to the 4th electric signal being converted into the 4th optical signal.The driving circuit can drive for the continuous mode of optical signal
Dynamic circuit.Wherein, electrooptical device can be photodiode, such as APD etc..The embodiment of the present invention does not limit this specifically
It is fixed.
It should be noted that the wavelength of above-mentioned third optical signal is specified wavelength, specified wavelength is different from the 4th optical signal
Wavelength.In transmission process, the power attenuation of the power attenuation of the third optical signal of the specified wavelength less than the 4th optical signal.
The specified wavelength can be 1550 nanometers, or the wavelength for the decaying of other signal powers less than the 4th optical signal, the present invention are implemented
Example is not especially limited this.
For the more detailed structure for showing the first relaying optical module 203a, Fig. 5 B shows the first relaying optical module
The detailed construction schematic diagram of 203a.
It should be noted that above-mentioned third optical signal will be received by optical splitter by the second relaying optical module 203b
4th optical signal carries out what wavelength conversion obtained, by when carrying out to the third optical signal in the first relaying optical module 203a
After clock data are restored, it is reduced into the 4th optical signal, while the long distance transmission for realizing optical signal, ensure that letter
Number received accuracy.Further, due to not needing to be changed the equipment (such as ONU and OLT) in former PON system
Realize long distance transmission, implementation is simple and has saved cost.
Fig. 6 A is the structural schematic diagram of second relaying optical module 203b provided in an embodiment of the present invention a kind of, referring to Fig. 6 A,
It include: third photo detecting unit 2039, the second electric signal processing unit 2035, third clock data recovery unit 20310, third
Light emitting unit 20311, the 4th photo detecting unit 20312, the 4th clock data recovery unit 20313 and the 4th light emitting unit
20314。
Wherein, third photo detecting unit 2039 connect 203a, third clock data recovery unit with the first relaying optical module
20310 connect with third photo detecting unit 2039, and the second electric signal processing unit 2035 connects with third clock data recovery unit
20310 are connect, third light emitting unit 20311 is connect with the second electric signal processing unit 2035, and third light emitting unit 20311 connects
It connects and is also connect with optical splitter 202.4th photo detecting unit 20312 is connect with optical splitter 202, the 4th clock data recovery unit
20313 connect 20312 with the 4th photo detecting unit, the 4th light emitting unit 20314 and the 4th clock data recovery unit 20313
Connection, the 4th light emitting unit 20314 are also connect with the first relaying optical mode 203a block.
Optical mode is relayed to second respectively below for the uplink process and downlink transmission process of passive optical network
The function of each section is explained in block 203a.
One, processing of the second relaying optical module 203b in the second optical signal to the first relaying optical module 203a received
In the process, functions are as follows:
Third photo detecting unit 2039 converts the second optical signal to continuously for receiving continuous second optical signal
It exports after 6th electric signal to third clock data recovery unit 20310；Third clock data recovery unit 20310, for pair
6th electric signal carries out clock and data recovery, obtains the 7th electric signal, the 7th electric signal is exported to the second Electric signal processing list
Member 2035；Second electric signal processing unit, for converting discrete 8th electric signal for the 7th electric signal, by the 8th telecommunications
Number output is to third light emitting unit 20311；Third light emitting unit 20311, it is discontinuous for being issued according to the 8th electric signal
The first optical signal.
Wherein, third photo detecting unit 2039 includes electrooptical device and amplitude limiting amplifier circuit.The electrooptical device
For output after continuous second optical signal is converted into electric signal to amplitude limiting amplifier circuit, the amplitude limiting amplifier circuit is for docking
The electric signal received amplifies processing, obtains continuous 6th electric signal.Third light emitting unit 20311 include laser and
Its driving circuit, the driving circuit are converted into electric current telecommunications by voltage electric signal for that will receive discrete 8th electric signal
Number, so that the 8th electric signal is converted into discrete 8th optical signal by laser.The driving circuit can be the non-of optical signal
Continuous mode driving circuit.Wherein, electrooptical device can be photodiode, such as APD etc..The embodiment of the present invention to this not
Make specific limit.
Wherein, continuous 7th electric signal is converted into discrete 8th electric signal by the second electric signal processing unit 2035
Process, with shown in Fig. 3 A relaying optical module 203 in the second electric signal processing unit 2035 by continuous third electric signal turn
Change the process of discrete 4th electric signal into similarly, details are not described herein.
It wherein, may include CDR chip in third clock data recovery unit 20310, for realizing the clock data of signal
Restore function, alternatively, third clock data recovery unit 20310 is using other chips with clock and data recovery function come real
The clock and data recovery of existing signal, the present invention is not especially limit this.
By carrying out clock and data recovery and wavelength conversion to the second optical signal, the second optical signal is reduced into
First optical signal of ONU201 transmitting ensure that signal while so that realizing the long distance transmission of optical signal
Received accuracy.Further, since do not need to be changed the equipment (such as ONU and OLT) in former PON system can be real
Existing long distance transmission, implementation is simple and has saved cost.
Two, the second relaying optical module 203b is in the treatment process of the 4th optical signal to the optical splitter 202 received, respectively
Partial function is as follows:
4th photo detecting unit 20312 is converted into the 9th electricity for receiving continuous 4th optical signal, by the 4th optical signal
It exports after signal to the 4th clock data recovery unit 20313；4th clock data recovery unit 20313 is used for the 9th telecommunications
Number carry out clock recovery, the tenth electric signal after clock recovery is exported to the 4th light emitting unit 20314；4th light emitting list
Member 20314 is for issuing third optical signal according to the tenth electric signal.
Wherein, the 4th photo detecting unit 20312 includes electrooptical device and amplitude limiting amplifier circuit.The electrooptical device
For output after continuous 4th optical signal is converted into electric signal to amplitude limiting amplifier circuit, the amplitude limiting amplifier circuit is for docking
The electric signal received amplifies processing, obtains the 9th electric signal.4th light emitting unit 20314 includes laser and its driving
Circuit, driving circuit are exported for that will receive after the tenth electric signal is converted into current electrical signal by voltage electric signal to laser
Device, laser are used to the tenth electric signal being converted into the 4th optical signal.The driving circuit can drive for the continuous mode of optical signal
Dynamic circuit.Wherein, electrooptical device can be photodiode, such as APD etc..The embodiment of the present invention does not limit this specifically
It is fixed.
For the more detailed structure for showing the second relaying optical module 203b, Fig. 6 B shows the second relaying optical module
The detailed construction schematic diagram of 203b.
In another embodiment, if the distance between OLT 201 and the second relaying optical module 203b are shorter, so that light is believed
Number phase offset will not be generated during transmission, then without carrying out clock to optical signal in the second relaying optical module 203b
Data are restored, then the second relaying optical module 203b can not include the 4th clock data recovery unit 20313, the embodiment of the present invention pair
This is not especially limited.
Those of ordinary skill in the art will appreciate that realizing that all or part of the steps of above-described embodiment can pass through hardware
It completes, relevant hardware can also be instructed to complete by program, the program can store in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of relaying optical module, which is characterized in that when including the first photo detecting unit, the first electric signal processing unit, first
Clock data recovery unit and the first light emitting unit,
First photo detecting unit converts non-company for first optical signal for receiving discrete first optical signal
It exports after the first continuous electric signal to first electric signal processing unit；
First electric signal processing unit will be described for converting continuous second electric signal for first electric signal
Second electric signal is exported to first clock data recovery unit；
First clock data recovery unit obtains third electricity for carrying out clock and data recovery to second electric signal
Signal exports the third electric signal to first light emitting unit；
First light emitting unit is used to issue continuous second optical signal according to the third electric signal.
2. relaying optical module according to claim 1, which is characterized in that first electric signal processing unit is used in institute
It states and is inserted into idle code stream in the first electric signal, obtain second electric signal.
3. relaying optical module according to claim 1, which is characterized in that the relaying optical module further includes the second electric signal
Processing unit,
First clock and data recovery is also used to after obtaining the third electric signal, and the third electric signal is exported to institute
State the second electric signal processing unit；
Second electric signal processing unit, for converting discrete 4th electric signal for the third electric signal, by institute
The 4th electric signal is stated to export to first light emitting unit；
First light emitting unit is also used to issue discrete first optical signal according to the third electric signal.
4. relaying optical module according to claim 3, which is characterized in that second electric signal processing unit is used in institute
The idle code stream that insertion is detected in third electric signal is stated, the bell idles diffluence that will test removes, and obtains the 4th electric signal.
5. relaying optical module according to claim 1, which is characterized in that first photo detecting unit includes photoelectric conversion
Device and amplitude limiting amplifier circuit.
6. relaying optical module according to claim 1, which is characterized in that first light emitting unit include laser and
Its driving circuit, output swashs to described after the driving circuit is used to for the voltage electric signal received being converted into current electrical signal
Light device.
7. relaying optical module according to claim 1, which is characterized in that the wavelength of second optical signal is specified wave
Long, the specified wavelength is different from the wavelength of first optical signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610538462.8A CN106209243B (en) | 2016-07-08 | 2016-07-08 | relay optical module |
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| CN201610538462.8A CN106209243B (en) | 2016-07-08 | 2016-07-08 | relay optical module |
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| CN106209243B true CN106209243B (en) | 2018-12-18 |
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Citations (5)
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|---|---|---|---|---|
| CN101263674A (en) * | 2005-12-09 | 2008-09-10 | 古河电气工业株式会社 | Light relay device and light transmission system |
| CN101459472A (en) * | 2007-08-10 | 2009-06-17 | 华为技术有限公司 | Method, system and apparatus realizing remote data transmission in passive optical network |
| WO2009135437A1 (en) * | 2008-05-09 | 2009-11-12 | 华为技术有限公司 | Optical communication system, apparatus and method |
| CN101729154A (en) * | 2008-11-03 | 2010-06-09 | 华为技术有限公司 | Method, device and system for realizing LR-PON |
| WO2010091556A1 (en) * | 2009-02-16 | 2010-08-19 | 华为技术有限公司 | Method for burst transmission on a passive optical network, method and device for receiver resetting |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101263674A (en) * | 2005-12-09 | 2008-09-10 | 古河电气工业株式会社 | Light relay device and light transmission system |
| CN101459472A (en) * | 2007-08-10 | 2009-06-17 | 华为技术有限公司 | Method, system and apparatus realizing remote data transmission in passive optical network |
| WO2009135437A1 (en) * | 2008-05-09 | 2009-11-12 | 华为技术有限公司 | Optical communication system, apparatus and method |
| CN101729154A (en) * | 2008-11-03 | 2010-06-09 | 华为技术有限公司 | Method, device and system for realizing LR-PON |
| WO2010091556A1 (en) * | 2009-02-16 | 2010-08-19 | 华为技术有限公司 | Method for burst transmission on a passive optical network, method and device for receiver resetting |
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