CN106209243A - Relaying optical module - Google Patents
Relaying optical module Download PDFInfo
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- CN106209243A CN106209243A CN201610538462.8A CN201610538462A CN106209243A CN 106209243 A CN106209243 A CN 106209243A CN 201610538462 A CN201610538462 A CN 201610538462A CN 106209243 A CN106209243 A CN 106209243A
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- data recovery
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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
- H04B10/29—Repeaters
Abstract
The invention discloses a kind of relaying optical module, 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 Optical Transmit Unit, the first photo detecting unit is used for receiving discrete first optical signal, and the first optical signal is converted into discrete first signal of telecommunication；First electric signal processing unit for being converted into continuous print second signal of telecommunication by first signal of telecommunication；First clock data recovery unit obtains the 3rd signal of telecommunication for second signal of telecommunication is carried out clock and data recovery；First Optical Transmit Unit is for sending continuous print the second optical signal according to the 3rd signal of telecommunication.By carrying out clock and data recovery process after discrete first optical signal is carried out continuous treatment again, the clock data recovery unit moment is made to be in normal operating conditions, achieve the clock and data recovery to optical signal, while ensure that long range propagation, it is ensured that the reception accuracy of optical signal.
Description
Technical field
The present invention relates to technical field of optical fiber communication, relay optical module particularly to one.
Background technology
Along with the development of Fibre Optical Communication Technology, system is for PON (Passive Optical Network, EPON)
Through being widely used.It is illustrated in figure 1 the structural representation of PON system in prior art, including OLT (Optical Line
Terminal, optical line terminal), beam splitter and multiple ONU (Optical Network Unit, optical network unit).Wherein,
Beam splitter includes a public port and 2N drop two port, for the road optical signal that public port receives is divided into 2N road light letter
Number.OLT is arranged at central office, is connected with the public port of beam splitter；Multiple ONU are arranged at user side, each ONU and beam splitter
Drop two port connect.In PON system, optical signal from ONU transmission to OLT be the uplink of optical signal, at optical signal
Uplink during, ONU generally uses burst transmissions mode, launches discrete optical signal, this discrete optical signal
Through beam splitter transmission to OLT.
Problems with is there may be during realizing the prior art:
Owing to optical signal can produce phase offset during long range propagation, to enable receiving terminal to normally receive
Optical signal, need to carry out phase recovery to the optical signal that phase offset occurs, and ONU cannot be launched by prior art discontinuous
Optical signal carry out phase recovery so that the transmission range of optical signal is 20 kms to the maximum, limits the transmission range of optical signal.
Summary of the invention
In order to solve problem of the prior art, this application provides a kind of relaying optical module.Described technical scheme is as follows:
First aspect, it is provided that 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 Optical Transmit Unit,
Described first photo detecting unit, is used for receiving discrete first optical signal, is converted into by described first optical signal
After discrete first signal of telecommunication, output is to described first electric signal processing unit；
Described first electric signal processing unit, for described first signal of telecommunication is converted into continuous print second signal of telecommunication, will
Described second signal of telecommunication output is to described first clock data recovery unit；
Described first clock data recovery unit, for described second signal of telecommunication is carried out clock and data recovery, obtains the
Three signals of telecommunication, by described 3rd signal of telecommunication output to described first Optical Transmit Unit；
Described first Optical Transmit Unit is for sending continuous print the second optical signal according to described 3rd signal of telecommunication.
The technical scheme that the embodiment of the present invention provides has the benefit that
Owing to clock data recovery unit can only carry out clock recovery to continuous print signal, by discrete first
Optical signal carries out clock and data recovery process after carrying out continuous treatment again so that the clock data recovery unit moment is in normally
Duty, it is achieved that the clock and data recovery to optical signal, it is ensured that while long range propagation, it is ensured that connecing of optical signal
Receive accuracy.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, in embodiment being described below required for make
Accompanying drawing be briefly described, it should be apparent that, below describe in accompanying drawing be only some embodiments of the present invention, for
From the point of view of those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the structural representation of a kind of passive optical network in prior art；
Fig. 2 is the structural representation of a kind of passive optical network that the embodiment of the present invention provides；
Fig. 3 A is a kind of structural representation relaying optical module 203 that the embodiment of the present invention provides；
A kind of signal contrast schematic diagram inserted before and after idle code stream that Fig. 3 B is that the embodiment of the present invention provides；
A kind of signal contrast schematic diagram removed before and after idle code stream that Fig. 3 C is that the embodiment of the present invention provides；
Fig. 3 D is a kind of structural representation relaying optical module 203 that the embodiment of the present invention provides；
Fig. 4 is the structural representation of a kind of passive optical network that the embodiment of the present invention provides；
Fig. 5 A is the structural representation of a kind of first relaying optical module 203a that the embodiment of the present invention provides；
Fig. 5 B is the detailed construction schematic diagram of a kind of first relaying optical module 203a that the embodiment of the present invention provides；
Fig. 6 A is the structural representation of a kind of second relaying optical module 203b that the embodiment of the present invention provides；
Fig. 6 B is the detailed construction schematic diagram of a kind of second relaying optical module 203b that the embodiment of the present invention provides.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
In order to preferably the embodiment of the present invention explains, before relaying optical module is introduced, first to this
The application scenarios of inventive embodiments is simply introduced, and refers to Fig. 2.
Fig. 2 is the structural representation of a kind of passive optical network that the embodiment of the present invention provides, and sees Fig. 2, system bag
Include OLT 201, beam splitter 202, relaying optical module 203 and ONU 204.
Wherein, beam splitter 202 includes public port and multiple drop two port.The public port of beam splitter 202 is with OLT 201 even
Connecing, arbitrary drop two port 2021 of beam splitter 202 is connected with relaying optical module 203, and relaying optical module 203 is connected with ONU 204.
In this passive optical network, the transmitting procedure of optical signal includes downlink transmission process and uplink process.Under
In row transmitting procedure, OLT 201 launches continuous print optical signal, and during uplink, ONU 204 launches 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 at beam splitter
Relaying optical module is added, so that optical signal is carried out power back-off between 202 and ONU 204.Passive optical network divides
The most corresponding road light path of each drop two port of light device 202, the embodiment of the present invention is only with the road light path indicated by drop two port 2021
As a example by be introduced, also can increase relaying optical module between the ONU 204 that other drop two port of beam splitter 202 are corresponding, this
This is not especially limited by inventive embodiments.
Fig. 3 A is a kind of structural representation relaying optical module 203 that the embodiment of the present invention provides, and sees Fig. 3 A, this relaying
Optical module include first photo detecting unit the 2031, first electric signal processing unit the 2032, first clock data recovery unit 2033,
First Optical Transmit Unit 2034 and the second electric signal processing unit 2035.
Wherein, the first photo detecting unit 2031, it is used for receiving discrete first optical signal, the first optical signal is converted into
Export to the first electric signal processing unit 2032 after discrete first signal of telecommunication.This first optical signal can be by EPON system
The ONU 204 being connected with relaying optical module 203 in system launches, and this first optical signal includes multiple burst packet, any two
Between adjacent burst packet, there is certain time interval.
First electric signal processing unit 2032, for being converted into continuous print second signal of telecommunication by first signal of telecommunication, by second
The signal of telecommunication exports 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, obtain the 3rd signal of telecommunication, the 3rd signal of telecommunication is transmitted to the second electric signal processing unit 2035.
In order to not change the original first discontinuous feature of optical signal, secondary signal processing unit 2035, for turning the 3rd signal of telecommunication
Turn to discrete 4th signal of telecommunication, the 4th signal of telecommunication is exported to the first Optical Transmit Unit 2034, by the first Optical Transmit Unit
2034 send discrete first optical signal according to the 3rd signal of telecommunication, in order to passed by beam splitter 202 by this first optical signal
Transport to OLT 201, to realize the transmission of optical signal.
Wherein, the first photo detecting unit 2031 includes electrooptical device and amplitude limiting amplifier circuit.This electrooptical device
Exporting to amplitude limiting amplifier circuit after discrete first optical signal is converted into the signal of telecommunication, this amplitude limiting amplifier circuit is for right
The signal of telecommunication received is amplified processing, and obtains discrete first signal of telecommunication.First Optical Transmit Unit 2034 includes laser
Device and drive circuit thereof, drive circuit is converted into electric current electricity for receiving discrete 4th signal of telecommunication by the voltage signal of telecommunication
Exporting after signal to laser instrument, laser instrument is for being converted into discrete first optical signal by the 4th signal of telecommunication.This drive circuit
It can be the non-continuous mode drive circuit of optical signal.Wherein, electrooptical device can be photodiode, such as APD
(Avalanche Photo Diode, avalanche photodide) etc..This is not especially limited by the embodiment of the present invention.
Wherein, the processing procedure of first signal of telecommunication is by the first electric signal processing unit 2032: insert in first signal of telecommunication
Enter idle code stream, obtain continuous print second signal of telecommunication.That is to say and discrete first signal of telecommunication is converted into continuous print the second electricity
Signal, in order to this continuous print second signal of telecommunication is carried out clock and data recovery.Specifically, in the first electric signal processing unit 2032
Be previously stored with pre-arranged code rule, for discrete first signal of telecommunication, when detect there is no signal time, generate meet default
The idle code stream of coding rule, and this free time code stream is inserted into this time period not having signal.If be detected that there is signal, then
It is not inserted into idle code stream.
This pre-arranged code rule can preset or change, and such as, this pre-arranged code rule can be continuous print
010101 codings etc., this is not especially limited by the embodiment of the present invention.As shown in Figure 3 B for the signal before and after the idle code stream of insertion
Contrast schematic diagram.First electric signal processing unit 2032 can use fpga chip to realize inserting the function of idle code stream, should
Fpga chip can be high speed fpga chip.Or, the first electric signal processing unit 2032 uses other to have the idle code stream of insertion
Chip realize removing the function of idle code stream, this is not especially limited by the embodiment of the present invention.
Wherein, the processing procedure of the 3rd signal of telecommunication is by the second electric signal processing unit 2035: examine in the 3rd signal of telecommunication
Survey the idle code stream inserted, the bell idles diffluence detected is removed, obtains discrete 4th signal of telecommunication.Specifically, the second electricity
Signal processing unit 2035 can prestore pre-arranged code rule, after receiving the 3rd signal of telecommunication, detects the 3rd signal of telecommunication
In whether comprise meet pre-arranged code rule idle code stream, if comprised, then remove this free time code stream, as shown in Figure 3 C, go
Except the signal contrast schematic diagram before and after idle code stream.Wherein, the second electric signal processing unit 2035 can use fpga chip real
Now removing the function of idle code stream, this fpga chip can be high speed fpga chip.Or, the second electric signal processing unit 2035 is adopted
Realizing removing the function of idle code stream with other chips with the idle code stream of removal, this is not made specifically by the embodiment of the present invention
Limit.
It should be noted that due in long range propagation optical signal can produce dispersion, cause phase offset, it is therefore desirable to
Optical signal is carried out clock and data recovery, to ensure that transmitting terminal is Tong Bu with the signal phase of receiving terminal.In embodiments of the present invention,
Use the first clock data recovery unit 2033 to realize the clock and data recovery of optical signal.With the first clock data recovery unit
As a example by 2033 use CDR (Clock Data Recovery, clock and data recovery) chip to realize clock and data recovery function, by
Certain locking time, usually Millisecond is needed by off working state conversion to duty in CDR chip.And the first light letter
Number multiple burst packet in, the time interval of the burst packet that any two is adjacent is the shortest, usually nanosecond, far
Locking time much smaller than CDR chip so that CDR chip cisco unity malfunction, and then clock and data recovery cannot be realized.This
Bright embodiment is by carrying out clock and data recovery process again after the first optical signal is carried out continuous treatment so that clock data
The recovery unit moment is in normal operating conditions, continuous signal after being processed by clock and data recovery not only but also convert back discrete
Signal, it is ensured that while long range propagation, it is ensured that the reception accuracy of optical signal.
Foregoing is the process that discrete optical signal that ONU 204 launches is processed by relaying optical module 203, also
I.e., the process optical signal of uplink processed.The company that OLT 201 can also be launched by this relaying optical module 203
Continuous optical signal processes.Accordingly, see this relaying optical module 203 of Fig. 3 D also to include: the second photo detecting unit 2036,
Two clock data recovery unit 2037 and the second Optical Transmit Units 2038.
Wherein, the second photo detecting unit 2036 is used for receiving continuous print the 3rd optical signal, and the 3rd optical signal is converted into
Export to second clock data recovery unit 2037 after five signals of telecommunication；Second clock data recovery unit 2037 is for the 4th electricity
Signal carries out clock and data recovery, exports the 5th signal of telecommunication after clock and data recovery to the second Optical Transmit Unit 2038；The
Two Optical Transmit Units 2038 are for sending the 4th optical signal according to the 5th signal of telecommunication.
Wherein, the second photo detecting unit 2036 includes electrooptical device and amplitude limiting amplifier circuit.This electrooptical device
Exporting to amplitude limiting amplifier circuit after continuous print the 3rd optical signal is converted into the signal of telecommunication, this amplitude limiting amplifier circuit is used for docking
The signal of telecommunication received is amplified processing, and obtains the 5th signal of telecommunication.Second Optical Transmit Unit 2038 includes laser instrument and driving thereof
Circuit, drive circuit exports to laser for receiving after the 4th signal of telecommunication is converted into current electrical signal by the voltage signal of telecommunication
Device, laser instrument is for being converted into the 4th optical signal by the 4th signal of telecommunication.This drive circuit can be that the continuous mode of optical signal drives
Galvanic electricity road.Wherein, electrooptical device can be photodiode, such as APD etc..This is the most specifically limited by the embodiment of the present invention
Fixed.
Embodiment shown in above-mentioned Fig. 2 and Fig. 3 A is by optical signal is carried out clock and data recovery to realize distance
Transmission, in order to improve the transmission range of optical signal further, on the basis of optical signal is carried out clock and data recovery, this
Bright embodiment can also carry out wavelength convert to optical signal, to reduce the power attenuation of optical signal in transmitting procedure, this kind of feelings
Under condition, two relaying optical modules need to be used to realize the clock and data recovery function of above-mentioned relaying optical module 203.Real in the present invention
Executing these two relaying optical modules in example is the first relaying optical module 203a and second relaying optical module 203b, in the case of this kind, nothing
The structure of source optical-fiber network refers to Fig. 4, and the concrete introduction of the first relaying optical module 203a and the second relaying optical module 203b is joined respectively
See Fig. 5 A and Fig. 6 A.
Fig. 4 is the structural representation of a kind of passive optical network that the embodiment of the present invention provides, and sees Fig. 4, system bag
Include OLT 201, beam splitter 202, first relays optical module 203a and second relaying optical module 203b and ONU 204.
Wherein, beam splitter 202 includes public port and multiple drop two port.The public port of beam splitter 202 is with OLT 201 even
Connecing, arbitrary drop two port 2021 of beam splitter 202 is connected with the second relaying optical module 203b, the second relaying optical module 203b and first
Relaying optical module 203a connects, and the first relaying optical module 203a with ONU204 is connected.
In order to improve the signal transmission distance between ONU 204 and OLT 201, the embodiment of the present invention beam splitter 202 with
The first relaying optical module 203a and second relaying optical module 203b is added, so that optical signal is carried out clock number between ONU 204
According to recovery, optical signal is carried out wavelength convert, to reduce the power attenuation of optical signal in transmitting procedure simultaneously.
It should be noted that the wavelength of the downlink optical signal that OLT 201 launches is 1490 nanometers in usual PON system
(nm).The wavelength of the uplink optical signal that ONU 204 launches is 1310 nanometers.The optical signal of this 1490 nanometer and 1310 nanometers is being grown
It is lost the biggest in Distance Transmission so that the distance limit between beam splitter 202 and ONU 204 is within 20 kms.Specifically
In enforcement, on the basis of optical signal is carried out clock and data recovery, the first relaying optical module 203a can will receive ONU 204
Uplink optical signal be converted into the optical signal of specified wavelength after transmit to the second relaying optical module 203b；Second relaying optical module
203b transmits after the downlink optical signal receiving OLT 201 can be converted into the optical signal of specified wavelength to the first relaying optical module
203a.That is to say, between the first relaying optical module 203a and the second relaying optical module 203b, the wavelength of the optical signal of transmission is
Specified wavelength.Wherein, there is the optical signal of the specified wavelength power attenuation in transmitting procedure, receive less than 1490 nanometers and 1310
The power attenuation of the optical signal of rice.This specified wavelength can be 1550 nanometers, or is less than for the loss of other long range propagation
The wavelength of the optical signal of 1490 nanometers and 1310 nanometers, this is not especially limited by the embodiment of the present invention.By to optical signal
On the basis of carrying out clock and data recovery, optical signal is carried out wavelength conversion so that between beam splitter 202 and ONU 204 away from
From extending to 80 kms, substantially increase transmission range.
Fig. 5 A is the structural representation of a kind of first relaying optical module 203a that the embodiment of the present invention provides, and sees Fig. 5 A,
Including: first photo detecting unit the 2031, first electric signal processing unit the 2032, first clock data recovery unit 2033, first
Optical Transmit Unit the 2034, second photo detecting unit 2036, second clock data recovery unit 2037 and the second Optical Transmit Unit
2038。
Wherein, the first photo detecting unit 2031 is connected with ONU 204, and the first electric signal processing unit 2032 and the first light are visited
Surveying unit 2031 to connect, the first clock data recovery unit 2033 is connected with the first electric signal processing unit 2032, and the first light is sent out
Penetrate unit 2034 to be connected with the first clock data recovery unit 2033, the first Optical Transmit Unit 2034 connect also with second relaying light
Module 203b connects.Second photo detecting unit 2036 is connected with the second relaying optical module 203b, second clock data recovery unit
2037 are connected with the second photo detecting unit 2036, and the second Optical Transmit Unit 2038 is with second clock data recovery unit 2037 even
Connecing, the second Optical Transmit Unit 2038 is also connected with ONU 204.
Uplink process and downlink transmission process below for passive optical network are respectively to the first relaying optical mode
In block 203a, the function of each several part explains.
One, the first relaying optical module 203a is in the processing procedure of the uplink optical signal to the ONU 204 received, each portion
Divide function as follows:
First photo detecting unit 2031, is used for receiving discrete first optical signal, the first optical signal is converted into non-company
Export to the first electric signal processing unit 2032 after the first continuous signal of telecommunication；First electric signal processing unit 2032, for by the
One signal of telecommunication is converted into continuous print second signal of telecommunication, exports second signal of telecommunication to the first clock data recovery unit 2033；The
One clock data recovery unit 2033, for second signal of telecommunication is carried out clock and data recovery, obtains the 3rd signal of telecommunication, to eliminate
The phase offset caused due to long range propagation, it is ensured that signal synchronizes, exports the 3rd signal of telecommunication to the first Optical Transmit Unit
2034；First Optical Transmit Unit 2034 is for sending continuous print the second optical signal according to the 3rd signal of telecommunication, by this continuous print second
Optical signal transmission relays optical module 203b to second.
Wherein, the first photo detecting unit 2031 includes electrooptical device and amplitude limiting amplifier circuit.This electrooptical device
Exporting to amplitude limiting amplifier circuit after discrete first optical signal is converted into the signal of telecommunication, this amplitude limiting amplifier circuit is for right
The signal of telecommunication received is amplified processing, and obtains discrete first signal of telecommunication.First Optical Transmit Unit 2034 includes laser
Device and drive circuit thereof, this drive circuit is converted into electric current electricity for receiving continuous print the 3rd signal of telecommunication by the voltage signal of telecommunication
Signal, in order to the 3rd signal of telecommunication is converted into the second optical signal by laser instrument.This drive circuit can be the continuous mode of optical signal
Drive circuit.Wherein, electrooptical device can be photodiode, such as APD etc..This is the most specifically limited by the embodiment of the present invention
Fixed.
Wherein, discrete first signal of telecommunication is converted into continuous print second signal of telecommunication by the first electric signal processing unit 2032
Process, with the first electric signal processing unit 2032 in the relaying optical module shown in Fig. 3 A by discrete first the signal of telecommunication conversion
Become the process of continuous print second signal of telecommunication in like manner, do not repeat them here.
Wherein, can comprise CDR chip in the first clock data recovery unit 2033, the clock data being used for realizing signal is extensive
Multiple function, or, the first clock data recovery unit 2033 uses other chips with clock and data recovery function to realize
The clock and data recovery of signal, this is not especially limited by the embodiment of the present invention.
In another embodiment, if the distance between ONU201 and first relaying optical module 203a is shorter so that light is believed
Number will not produce phase offset during transmission, then without optical signal being carried out clock in the first relaying optical module 203a
Data are recovered, then the first relaying optical module 203a can not comprise 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, it is intended that wavelength is different from the first optical signal
Wavelength.In transmitting procedure, the power attenuation of the second optical signal of this specified wavelength is less than the power attenuation of the first optical signal.
This specified wavelength can be 1550 nanometers, or be less than the wavelength of the first optical signal for the decay of other signal powers, and the present invention implements
This is not especially limited by example.
Two, the process of the downlink optical signal of the first relaying optical module 203a the second relaying optical module 203b to receiving
Cheng Zhong, functions is as follows:
Second photo detecting unit 2036 is used for receiving continuous print the 3rd optical signal, and the 3rd optical signal is converted into the 5th telecommunications
Export after number to second clock data recovery unit 2037.3rd optical signals second relays optical module 203b and will receive
Send after the 4th optical signal conversion that OLT 201 launches.Second clock data recovery unit 2037 is for entering the 4th signal of telecommunication
Row clock data are recovered, and export the 5th signal of telecommunication after clock and data recovery to the second Optical Transmit Unit 2038；Second light is sent out
Penetrate unit 2038 for sending the 4th optical signal according to the 5th signal of telecommunication.
Wherein, the second photo detecting unit 2036 includes electrooptical device and amplitude limiting amplifier circuit.This light Denso parallel operation part
Exporting to amplitude limiting amplifier circuit after continuous print the 3rd optical signal is converted into the signal of telecommunication, this amplitude limiting amplifier circuit is used for docking
The signal of telecommunication received is amplified processing, and obtains the 5th signal of telecommunication.Second Optical Transmit Unit 2038 includes laser instrument and driving thereof
Circuit, drive circuit exports to laser for receiving after the 4th signal of telecommunication is converted into current electrical signal by the voltage signal of telecommunication
Device, laser instrument is for being converted into the 4th optical signal by the 4th signal of telecommunication.This drive circuit can be that the continuous mode of optical signal drives
Galvanic electricity road.Wherein, electrooptical device can be photodiode, such as APD etc..This is the most specifically limited by the embodiment of the present invention
Fixed.
It should be noted that the wavelength of above-mentioned 3rd optical signal is specified wavelength, it is intended that wavelength is different from the 4th optical signal
Wavelength.In transmitting procedure, the power attenuation of the 3rd optical signal of this specified wavelength is less than the power attenuation of the 4th optical signal.
This specified wavelength can be 1550 nanometers, or be less than the wavelength of the 4th optical signal for the decay of other signal powers, and the present invention implements
This is not especially limited by example.
For the more detailed structure illustrating 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 3rd optical signal will be received by beam splitter by the second relaying optical module 203b
4th optical signal carries out what wavelength conversion obtained, by when carrying out the 3rd optical signal in the first relaying optical module 203a
After clock data are recovered, it is reduced into the 4th optical signal, while achieving the long range propagation of optical signal, it is ensured that letter
Number receive accuracy.Further, it is changed just may be used to the equipment (such as ONU and OLT) in former PON system owing to need not
Realize long range propagation, it is achieved mode is simple and has saved cost.
Fig. 6 A is the structural representation of a kind of second relaying optical module 203b that the embodiment of the present invention provides, and sees Fig. 6 A,
Including: the 3rd photo detecting unit the 2039, second electric signal processing unit the 2035, the 3rd clock data recovery unit the 20310, the 3rd
Optical Transmit Unit the 20311, the 4th photo detecting unit the 20312, the 4th clock data recovery unit 20313 and the 4th Optical Transmit Unit
20314。
Wherein, the 3rd photo detecting unit 2039 is connected 203a with the first relaying optical module, the 3rd clock data recovery unit
20310 are connected with the 3rd photo detecting unit 2039, and the second electric signal processing unit 2035 and the 3rd clock data recovery unit are even
Connecing 20310, the 3rd Optical Transmit Unit 20311 is connected with the second electric signal processing unit 2035, and the 3rd Optical Transmit Unit 20311 is even
Connect and be also connected with beam splitter 202.4th photo detecting unit 20312 is connected with beam splitter 202, the 4th clock data recovery unit
20313 are connected 20312 with the 4th photo detecting unit, the 4th Optical Transmit Unit 20314 and the 4th clock data recovery unit 20313
Connecting, the 4th Optical Transmit Unit 20314 is also connected with the first relaying optical mode 203a block.
Uplink process and downlink transmission process below for passive optical network are respectively to the second relaying optical mode
In block 203a, the function of each several part explains.
One, the second relaying optical module 203b is in the process of the second optical signal to the first relaying optical module 203a received
During, functions is as follows:
3rd photo detecting unit 2039, is used for receiving continuous print the second optical signal, the second optical signal is converted into continuous print
Export to the 3rd clock data recovery unit 20310 after 6th signal of telecommunication；3rd clock data recovery unit 20310, for right
6th signal of telecommunication carries out clock and data recovery, obtains the 7th signal of telecommunication, exports the 7th signal of telecommunication to the second Electric signal processing list
Unit 2035；Second electric signal processing unit, for being converted into discrete 8th signal of telecommunication by the 7th signal of telecommunication, by the 8th telecommunications
Number output to the 3rd Optical Transmit Unit 20311；3rd Optical Transmit Unit 20311, for sending discontinuous according to the 8th signal of telecommunication
The first optical signal.
Wherein, the 3rd photo detecting unit 2039 includes electrooptical device and amplitude limiting amplifier circuit.This electrooptical device
Exporting to amplitude limiting amplifier circuit after continuous print the second optical signal is converted into the signal of telecommunication, this amplitude limiting amplifier circuit is used for docking
The signal of telecommunication received is amplified processing, and obtains continuous print the 6th signal of telecommunication.3rd Optical Transmit Unit 20311 include laser instrument and
Its drive circuit, this drive circuit is converted into electric current telecommunications for receiving discrete 8th signal of telecommunication by the voltage signal of telecommunication
Number, in order to the 8th signal of telecommunication is converted into discrete 8th optical signal by laser instrument.This drive circuit can be the non-of optical signal
Continuous mode drive circuit.Wherein, electrooptical device can be photodiode, such as APD etc..The embodiment of the present invention is to this not
Make concrete restriction.
Wherein, continuous print the 7th signal of telecommunication is converted into discrete 8th signal of telecommunication by the second electric signal processing unit 2035
Process, with the second electric signal processing unit 2035 in the relaying optical module 203 shown in Fig. 3 A, continuous print the 3rd signal of telecommunication is turned
Change the process of discrete 4th signal of telecommunication in like manner, do not repeat them here.
Wherein, the 3rd clock data recovery unit 20310 can comprise CDR chip, be used for realizing the clock data of signal
Recover function, or, it is next real that the 3rd clock data recovery unit 20310 uses other to have the chip of clock and data recovery function
The clock and data recovery of existing signal, this is not especially limited by the embodiment of the present invention.
By the second optical signal is carried out clock and data recovery and wavelength conversion, the second optical signal is reduced into
The first optical signal that ONU201 launches so that while achieving the long range propagation of optical signal, it is ensured that signal
The accuracy received.Further, owing to need not to be changed the equipment (such as ONU and OLT) in former PON system just can be real
Existing long range propagation, it is achieved mode is simple and has saved cost.
Two, the second relaying optical module 203b is in the processing procedure of the 4th optical signal to the beam splitter 202 received, respectively
Partial function is as follows:
4th photo detecting unit 20312 is used for receiving continuous print the 4th optical signal, and the 4th optical signal is converted into the 9th electricity
Export after signal to the 4th clock data recovery unit 20313；4th clock data recovery unit 20313 is for the 9th telecommunications
Number carry out clock recovery, the tenth signal of telecommunication after clock recovery is exported to the 4th Optical Transmit Unit 20314；4th light emission list
Unit 20314 is for sending the 3rd optical signal according to the tenth signal of telecommunication.
Wherein, the 4th photo detecting unit 20312 includes electrooptical device and amplitude limiting amplifier circuit.This electrooptical device
Exporting to amplitude limiting amplifier circuit after continuous print the 4th optical signal is converted into the signal of telecommunication, this amplitude limiting amplifier circuit is used for docking
The signal of telecommunication received is amplified processing, and obtains the 9th signal of telecommunication.4th Optical Transmit Unit 20314 includes laser instrument and driving thereof
Circuit, drive circuit exports to laser for receiving after the tenth signal of telecommunication is converted into current electrical signal by the voltage signal of telecommunication
Device, laser instrument is for being converted into the 4th optical signal by the tenth signal of telecommunication.This drive circuit can be that the continuous mode of optical signal drives
Galvanic electricity road.Wherein, electrooptical device can be photodiode, such as APD etc..This is the most specifically limited by the embodiment of the present invention
Fixed.
For the more detailed structure illustrating 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 is shorter so that light is believed
Number will not produce phase offset during transmission, then without optical signal being carried out clock in the second relaying optical module 203b
Data are recovered, then the second relaying optical module 203b can not comprise the 4th clock data recovery unit 20313, the embodiment of the present invention pair
This is not especially limited.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can pass through hardware
Completing, it is also possible to instruct relevant hardware by program and complete, described program can be stored 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 only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (7)
1. one kind relaying optical module, it is characterised in that include the first photo detecting unit, the first electric signal processing unit, first time
Clock data recovery unit and the first Optical Transmit Unit,
Described first photo detecting unit, is used for receiving discrete first optical signal, described first optical signal is converted into non-company
After the first continuous signal of telecommunication, output is to described first electric signal processing unit；
Described first electric signal processing unit, for being converted into continuous print second signal of telecommunication by described first signal of telecommunication, by described
Second signal of telecommunication output is to described first clock data recovery unit；
Described first clock data recovery unit, for described second signal of telecommunication is carried out clock and data recovery, obtains the 3rd electricity
Signal, by described 3rd signal of telecommunication output to described first Optical Transmit Unit；
Described first Optical Transmit Unit is for sending continuous print the second optical signal according to described 3rd signal of telecommunication.
Relaying optical module the most according to claim 1, it is characterised in that described first electric signal processing unit is in institute
State and first signal of telecommunication inserts idle code stream, obtain described second signal of telecommunication.
Relaying optical module the most according to claim 1, it is characterised in that described relaying optical module also includes second signal of telecommunication
Processing unit,
Described first clock and data recovery is additionally operable to after obtaining described 3rd signal of telecommunication, exports described 3rd signal of telecommunication to institute
State the second electric signal processing unit；
Described second electric signal processing unit, for being converted into discrete 4th signal of telecommunication by described 3rd signal of telecommunication, by institute
State the 4th signal of telecommunication output to described first Optical Transmit Unit；
Described first Optical Transmit Unit is additionally operable to send discrete first optical signal according to described 3rd signal of telecommunication.
Relaying optical module the most according to claim 3, it is characterised in that described second electric signal processing unit is in institute
State the idle code stream detecting insertion in the 3rd signal of telecommunication, the bell idles diffluence detected is removed, obtain described 4th signal of telecommunication.
Relaying optical module the most according to claim 1, it is characterised in that described first photo detecting unit includes opto-electronic conversion
Device and amplitude limiting amplifier circuit.
Relaying optical module the most according to claim 1, it is characterised in that described first Optical Transmit Unit include laser instrument and
Its drive circuit, the output after the voltage signal of telecommunication received is converted into current electrical signal of described drive circuit swashs to described
Light device.
Relaying optical module the most according to claim 1, it is characterised in that the wavelength of described second optical signal is for specifying ripple
Long, described specified wavelength is different from the wavelength of described first optical signal.
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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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117319852A (en) * | 2023-11-29 | 2023-12-29 | 科谱半导体(天津)有限公司 | Resetting method and device of Optical Line Terminal (OLT) optical module, electronic equipment and storage medium |
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| CN101263674B (en) * | 2005-12-09 | 2012-09-26 | 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 |
| CN101577842B (en) * | 2008-05-09 | 2013-08-07 | 华为技术有限公司 | Optical communication system, optical communication device and optical communication method |
| CN101729154B (en) * | 2008-11-03 | 2012-04-18 | 华为技术有限公司 | Method, device and system for realizing LR-PON |
| IN2011KN03553A (en) * | 2009-02-16 | 2015-07-10 | Huawei Tech Co Ltd |
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| CN117319852A (en) * | 2023-11-29 | 2023-12-29 | 科谱半导体(天津)有限公司 | Resetting method and device of Optical Line Terminal (OLT) optical module, electronic equipment and storage medium |
| CN117319852B (en) * | 2023-11-29 | 2024-02-13 | 科谱半导体(天津)有限公司 | Resetting method and device of Optical Line Terminal (OLT) optical module, electronic equipment and storage medium |
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