CN104486028B - The system and method for wavelength-division multiplex soft exchange net low cost LAN service transmission - Google Patents
The system and method for wavelength-division multiplex soft exchange net low cost LAN service transmission Download PDFInfo
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Abstract
The present invention relates to the system and method that a kind of wavelength-division multiplex soft exchange net realizes inexpensive LAN service transmission.The system is：One optical line terminal (OLT) connects a distant-end node RN by a feeder fiber and forms tree network, be connected in distant-end node RN by profile fiber with optical network unit ONU, include N number of optical signal transmitter, N number of distributed feedback laser DFB, N number of optical signal receiver, three 1N array waveguide optical grating AWG, phase-modulator PM, three Optical circulators, Coarse Wave Division Multiplexer, wave band obstructing instrument WB, optoisolator, NN array waveguide optical grating AWG, N number of optical network unit ONU；Each optical network unit ONU includes two Coarse Wave Division Multiplexers, Optical circulator, optical branching device, three optical signal receivers, reflective semiconductor optical amplifier RSOA, electroabsorption modulator EAM and wideband light source BLS.The present invention, can be effectively in the middle high-speed transfer for realizing inexpensive LAN service of wavelength-division multiplex soft exchange net (WDM OAN) by the structure design of RN ends array waveguide grating and ONU end wideband light source.
Description
Technical field
The present invention relates to optical communication field, is specifically related to a kind of wavelength-division multiplex soft exchange net and realizes inexpensive LAN industry
The system and method for business transmission.
Background technology
Wave division multiplexing passive optical network WDM-PON technologies can upgrade band in the case where not changing physical basis equipment
Width, significantly lifts the transmission capacity of network, realizes virtual point-to-point transmission, information will not be shared between each user, has
There is natural security.Being in communication with each other between each optical network unit ONU, bears in the communication for reducing optical line terminal (OLT)
The WDM-PON of lotus Wave division multiplexing passive optical network becomes the research hotspot for realizing broadcast traffic transmissions.However, existing optical link
Terminal (OLT) makes what is realized between optical network unit ONU using light source of the laser as LAN service of specific wavelength
The cost of high speed transmission local domain network business is higher.
The content of the invention
It is an object of the invention in view of the defects existing in the prior art, there is provided a kind of wavelength-division multiplex soft exchange net
(WDM-OAN) system and method for realizing inexpensive LAN service transmission, can be effectively in wavelength-division multiplex soft exchange net
(WDM-OAN) high-speed transfer of inexpensive LAN service is realized in.
To reach above-mentioned purpose, core concept of the invention is：In optical network unit ONU place wideband light source BLS and
Electroabsorption modulator EAM, is modulated and sends to the local area network signal of wideband light source；N × N times are used at distant-end node RN
Train wave guide grating AWG is connected with optoisolator, by the frame mode of this new distant-end node RN, realizes LAN broadband light
The frequency spectrum cutting and transmission of signal；Using the loop cycle Shifting Property of the wavelength of N × N array waveguide optical grating AWG, local is realized
Network service carries out virtual ring-type transmission in each optical network unit ONU.
Conceived according to foregoing invention, the present invention uses following scheme：
The system that a kind of wavelength-division multiplex soft exchange net realizes inexpensive LAN service transmission, by optical line terminal (OLT)
One distant-end node RN is connected by a feeder fiber, distant-end node RN is connected to N number of optical network unit by profile fiber
ONU；It is characterized in that：
1), the optical line terminal (OLT) is by N number of optical signal transmitter, N number of distributed feedback laser DFB, N number of
Optical signal receiver, one 1 × N array waveguide optical grating AWG, 21 × N array waveguide optical grating AWG, one the 3rd
1 × N array waveguide optical grating AWG, a phase-modulator PM, first Optical circulator, a first Coarse Wave Division Multiplexer group
Into；In optical line terminal (OLT), N number of optical signal transmitter is connected to one 1 × N array waveguide optical grating AWG, one 1 × N
The output of array waveguide grating AWG is connected to the first Coarse Wave Division Multiplexer, and N number of distributed feedback laser DFB is connected to second
The output of 1 × N array waveguide optical grating AWG, 21 × N array waveguide optical grating AWG are connected to phase-modulator PM, phase-modulation
The output of device PM is connected to the first Optical circulator, and N number of optical signal receiver is connected to 31 × N array waveguide optical grating AWG, the
The output of 31 × N array waveguide optical grating AWG is connected to the first Optical circulator, and it is thick that the output of the first Optical circulator is connected to first
Wavelength division multiplexer, the output of the first Coarse Wave Division Multiplexer are connected to distant-end node RN by a feeder fiber；
2), the distant-end node RN is by, the second Optical circulator, the 3rd Optical circulator, wave band obstructing instrument WB, optically isolated
Device, N × N array waveguide optical grating AWG compositions, wherein, a feeder fiber is connected to the second Optical circulator, the second Optical circulator
Output be connected to the 3rd Optical circulator, an output of the 3rd Optical circulator is connected to the defeated of N × N array waveguide optical grating AWG
Inbound port 1, the other end are connected to wave band obstructing instrument WB, and the output of wave band obstructing instrument WB is connected to the second Optical circulator, meanwhile, N
The input port of × N array waveguide optical grating AWGOptoisolator is connected to, the output of optoisolator is connected to N × N array ripple
The input port of guide grating AWGN number of output of N × N array waveguide optical grating AWG respectively by N roots profile fiber with it is N number of
Optical network unit ONU is connected；
3), N number of optical network unit ONU is second Coarse Wave Division Multiplexer by being connected with profile fiber, one
A downstream signal reception machine, a broadcast signal receiver, a local area network signal receiver, an optical branching device, one it is anti-
Penetrate formula semiconductor optical amplifier RSOA, the 4th Optical circulator, the 3rd Coarse Wave Division Multiplexer, an electroabsorption modulator
EAM and wideband light source BLS composition；The output all the way of second Coarse Wave Division Multiplexer is divided into two-way by optical branching device and distinguishes
It is connected to a broadcast signal receiver and a reflective semiconductor optical amplifier RSOA, the output of its another way is directly connected to the
Four Optical circulators, the output of the 4th Optical circulator are connected to the 3rd Coarse Wave Division Multiplexer, the 3rd Coarse Wave Division Multiplexer it is defeated all the way
Go out to be connected to downstream signal reception machine, its another way is exported by being connected to local area network signal receiver, and wideband light source BLS's is defeated
Go out to be connected to electroabsorption modulator EAM, the output of electroabsorption modulator EAM is connected to the 4th Optical circulator.
A kind of method that wavelength-division multiplex soft exchange net realizes inexpensive LAN service transmission, using above-mentioned wavelength-division multiplex
Optical access network realizes that the system of low cost transmission LAN service transmission is operated, its transmission method is as follows：
First, for the transmission of broadcasting service, first in N number of distributed feedback laser in optical line terminal (OLT)
Device DFB produces N roads light carrierN roads light carrier passes through 21 × N array waveguide optical grating AWG ripples afterwards
Long multiplexing, multiplexed signal are connected to the modulation that phase-modulator PM carries out broadcast singal, are loaded with the optical signal of broadcast messageAfter the first Optical circulator, the first Coarse Wave Division Multiplexer multiplexing, it is transmitted to far through feeder fiber
End node RN；
In distant-end node RN, the broadcast singal in feeder fiberSuccessively pass through the second Optical circulator
After the 3rd Optical circulator, after N × N array waveguide optical grating AWG wavelength (de) multiplexings, the optical signal of broadcast message is loaded withN number of optical network unit ONU is sent to by N root profile fibers；
The optical signal in N number of optical network unit ONUBy after second Coarse Wave Division Multiplexer by light
Splitter is divided into two parts, wherein, a part is sent into the reception that broadcast signal receiver is used for broadcasting service, and another part is sent into
Reflective semiconductor optical amplifier RSOA modulates uplink signal；
2nd, the transmission of the uplink and downlink business in network, N number of optical signal transmitter production in optical line terminal (OLT)
Raw N roads are each loaded with the optical signal of downlink informationN roads optical signal passes through 1 × N array ripple afterwards
Guide grating AWG wavelength multiplexings, are sent into the first Coarse Wave Division Multiplexer and are sent by feeder fiber to distant-end node RN after multiplexing；
In distant-end node RN, the downlink signal in feeder fiberPass through the second Optical circulator and the 3rd
After Optical circulator, after N × N array waveguide optical grating AWG wavelength (de) multiplexings, the output of its N road is connected to N root profile fibers, will
It is loaded with the optical signal of downlink informationWith the optical signal for being loaded with broadcast singalN number of optical-fiber network list is transmitted to together
First ONU；
The optical signal in N number of optical network unit ONUPass through a second Coarse Wave Division Multiplexer wavelength
After demultiplexing, the 3rd Coarse Wave Division Multiplexer wavelength (de) multiplexing again is sent into by the 4th Optical circulator, is then loaded with downlink information
Optical signal pass through downstream signal reception machine complete downlink signal reception；
And it is loaded with the optical signal of broadcast singalTwo parts are divided into by optical branching device, wherein, a part is sent into reflection
Modulation of the formula semiconductor optical amplifier RSOA to uplink signal, another part are sent into connecing for broadcast signal receiver broadcasting service
Receive；
The modulated optical signal of uplink signal is carried out in reflective semiconductor optical amplifier RSOABy optical branching device,
Second Coarse Wave Division Multiplexer and profile fiber return in distant-end node RN again；In distant-end node RN, pass through N × N first
Array waveguide grating AWG wavelength multiplexings, subsequent uplink signalBy the 3rd Optical circulator, wave band obstructing instrument WB,
Optical line terminal (OLT) is returned to by feeder fiber after second Optical circulator；
In optical line terminal (OLT), uplink signalThrough the first Coarse Wave Division Multiplexer and first ring of light
Road device is after 31 × N array waveguide optical grating AWG is demultiplexed, N roads uplink signalBelieved respectively by N number of light
Number receiver receives；
Three, for the LAN service in network, the wideband light source BLS in N number of optical network unit ONU produces one
A wave-length coverage existsBroadband light carrier, afterwards broadband light carrier pass through electroabsorption modulator EAM carry out local area network signal
Modulation, the broadband optical signal for being then loaded with LAN Information passes through the 4th Optical circulator, the second Coarse Wave Division Multiplexer and distribution
Optical fiber returns in distant-end node RN again；In distant-end node RN, the road-load broadband optical signals for having LAN Information of N lead to first
Cross N × N array waveguide gratings AWG and carry out frequency spectrum cutting, then pass through frequency spectrum cutting is loaded with each optical network unit ON locals
The optical signal of net informationExport to N number of input port of N × N array waveguide optical grating AWG, wherein positioned at N × N
The LAN optical signal of array waveguide grating AWG input ports 1By the 3rd Optical circulator in wave band obstructing instrument
WB is filtered out, positioned at N × N array waveguide optical grating AWG input portsLAN optical signalOptically isolated
Separated in device, positioned at N × N array waveguide optical grating AWG input portsLAN optical signalBy optically isolated
N × N array waveguide grating AWG input ports are sent into after deviceWavelength (de) multiplexing, local area network signal after wavelength (de) multiplexing with
It is loaded with the optical signal of downlink informationWith the optical signal for being loaded with broadcast singalPassed together by N roots profile fiber
Transport to N number of optical network unit ONU；The LAN optical signal in N number of optical network unit ONUPass through one second
After Coarse Wave Division Multiplexer wavelength (de) multiplexing, the 3rd Coarse Wave Division Multiplexer wavelength (de) multiplexing again is sent into by the 4th Optical circulator,
The optical signal for being then loaded with LAN Information completes the reception of local area network signal by local area network signal receiver.
Compared with prior art, the present invention has following obvious prominent substantive distinguishing features and remarkable advantage：
By using light source of the wideband light source as LAN service in the N number of optical network unit ONU of this method, office is reduced
The cost of domain network service；N × N array waveguide optical grating AWG in distant-end node RN is carrying out wideband light source frequency spectrum cutting at the same time
Meanwhile its wavelength has the characteristics that loop cycle, it can realize that LAN service carries out virtual ring in each optical network unit ONU
Shape transmits, and N × N array waveguide optical grating AWG input port local area network business is demultiplexed, and LAN service can be with
The shared wave band of industry business is utilized without producing interference at N number of optical network unit ONU end with this to improve the wavelength of whole network
Rate.
Brief description of the drawings
Fig. 1 is that one embodiment of the invention wavelength-division multiplex soft exchange net realizes that the system of inexpensive LAN service transmission is shown
It is intended to.
Fig. 2 is the schematic diagram of wavelength-division multiplex soft exchange net medium wavelength distribution.
Embodiment
Details are as follows for the preferred embodiment of the present invention combination attached drawing：
Embodiment one：Referring to Fig. 1, this wavelength-division multiplex soft exchange net realizes the system that inexpensive LAN service transmits, by
Optical line terminal (OLT) (10) connects a distant-end node RN (30), distant-end node RN (30) by a feeder fiber (20)
N number of optical network unit ONU (50) is connected to by profile fiber (40).
Referring to Fig. 1, the optical line terminal (OLT) (10) is anti-by N number of optical signal transmitter (11), N number of distribution
Present laser DFB (12), N number of optical signal receiver (13), one 1 × N array waveguide optical grating AWG (14), one the 2nd 1
× N array waveguide gratings AWG (15), 31 × N array waveguide optical grating AWG (16), a phase-modulator PM (17),
One the first Optical circulator (18), the first Coarse Wave Division Multiplexer (19) composition, it is N number of in optical line terminal (OLT) (10)
Optical signal transmitter (11) is connected to one 1 × N array waveguide optical grating one 1 × N array waveguide optical grating AWG of AWG (14) (14)
Output be connected to the first Coarse Wave Division Multiplexer (19), N number of distributed feedback laser DFB (12) is connected to 21 × N array
The output of waveguide optical grating AWG (15), 21 × N array waveguide optical grating AWG (15) are connected to phase-modulator PM (17), phase
The output of modulator PM (17) is connected to the first Optical circulator (18), and N number of optical signal receiver (13) is connected to 31 × N times
The output of train wave guide grating AWG (16), 31 × N array waveguide optical grating AWG (16) are connected to the first Optical circulator (18), the
The output of one Optical circulator (18) is connected to the first Coarse Wave Division Multiplexer (19), and the output of the first Coarse Wave Division Multiplexer (19) passes through
A piece feeder fiber (20) is connected to distant-end node RN (30)；
Referring to Fig. 1, the distant-end node RN (30) is by the second Optical circulator (31), the 3rd Optical circulator (32), wave band
Obstructing instrument WB (33), optoisolator (34), N × N array waveguide optical grating AWG (35) compositions, wherein, a feeder fiber
(20) it is connected to the second Optical circulator (31), the output of the second Optical circulator (31) is connected to the 3rd Optical circulator (32), and the 3rd
One of Optical circulator (32) exports the input port 1 for being connected to N × N array waveguide optical grating AWG (35), and the other end is connected to ripple
Section obstructing instrument WB (33), the output of wave band obstructing instrument WB (33) are connected to the second Optical circulator (31), N × N array waveguide optical grating
The input port of AWG (35)Optoisolator (34) is connected to, the output of optoisolator (34) is connected to N × N array waveguide
The input port of grating AWG (35)N number of output of N × N array waveguide optical grating AWG (35) is distributed light by N roots respectively
Fine (40) are connected with N number of optical network unit ONU (50)；
Referring to Fig. 1, N number of optical network unit ONU (50) is second thick by one be connected with profile fiber (40)
Wavelength division multiplexer (51), a downstream signal reception machine (52), a broadcast signal receiver (53), a local area network signal connect
Receipts machine (54), an optical branching device (55), a reflective semiconductor optical amplifier RSOA (56), the 4th Optical circulator
(57), the 3rd Coarse Wave Division Multiplexer (58), an electroabsorption modulator EAM (59) and wideband light source BLS (60) group
Into the output all the way of the second Coarse Wave Division Multiplexer (51) is divided into two-way by optical branching device (55) and is respectively connected to a broadcast letter
Number receiver (53) and a reflective semiconductor optical amplifier RSOA (56), the output of its another way are directly connected to the 4th optical loop
Device (57), the output of the 4th Optical circulator (57) are connected to the 3rd Coarse Wave Division Multiplexer (58), the 3rd Coarse Wave Division Multiplexer (58)
Output all the way be connected to downstream signal reception machine (52), its another way is exported by being connected to local area network signal receiver
(54), the output of wideband light source BLS (60) is connected to electroabsorption modulator EAM (59), the output of electroabsorption modulator EAM (59)
It is connected to the 4th Optical circulator (57).
Embodiment two：
Referring to Fig. 1, system shown in Figure 2, realizes that system wavelength-division multiplex soft exchange net realizes inexpensive LAN service transmission
System specific method be：The transmission of broadcasting service is carried out using said system；
First N roads light is produced in N number of distributed feedback laser DFB (12) in optical line terminal (OLT) (10)
Carrier waveN roads light carrier passes through 21 × N array waveguide optical grating AWG (15) wavelength multiplexing, multiplexing afterwards
Signal afterwards is connected to the modulation that phase-modulator PM (17) carries out broadcast singal, is loaded with the optical signal of broadcast messageAfter the first Optical circulator (18), the first Coarse Wave Division Multiplexer (19) multiplexing, through feeder fiber
(20) it is transmitted to distant-end node RN (30)；
In distant-end node RN (30), the broadcast singal in feeder fiber (20)Successively pass through second
After Optical circulator (31) and the 3rd Optical circulator (32), after N × N array waveguide optical grating AWG (35) wavelength (de) multiplexing, it is loaded with
The optical signal of broadcast messageN number of optical network unit ONU is sent to by N roots profile fiber (40)
(50)；
The optical signal in N number of optical network unit ONU (50)Pass through second Coarse Wave Division Multiplexer
(51) two parts are divided into by optical branching device (55) after, wherein, a part is sent into broadcast signal receiver (53) and is used for broadcasting service
Reception, another part be sent into reflective semiconductor optical amplifier RSOA (56)；
Uplink signal is modulated；The transmission of uplink and downlink business in network, the N in optical line terminal (OLT) (10)
A optical signal transmitter (11) produces the optical signal that N roads are each loaded with downlink informationN roads light is believed afterwards
Number by 1 × N array waveguide optical grating AWG (14) wavelength multiplexing, the first Coarse Wave Division Multiplexer (19) is sent into after multiplexing and is passed through
Feeder fiber (20) is sent to distant-end node RN (30)；
In distant-end node RN (30), the downlink signal in feeder fiber (20)Pass through second ring of light
After road device (31) and the 3rd Optical circulator (32), after N × N array waveguide optical grating AWG (35) wavelength (de) multiplexing, its N road is defeated
Go out to be connected to N roots profile fiber (40), the optical signal of downlink information will be loaded withWith the optical signal for being loaded with broadcast singal (1≤
N≤N) N number of optical network unit ONU (50) is transmitted to together；
The optical signal in N number of optical network unit ONU (50)Pass through second Coarse Wave Division Multiplexer
(51) after wavelength (de) multiplexing, the 3rd Coarse Wave Division Multiplexer (58) wavelength (de) multiplexing again is sent into by the 4th Optical circulator (57),
The optical signal for being then loaded with downlink information completes the reception of downlink signal by downstream signal reception machine (52), and is loaded with broadcast letter
Number optical signalTwo parts are divided into by optical branching device (55), wherein, a part is sent into reflective semiconductor optical amplifier
Modulation of the RSOA (56) to uplink signal, another part are sent into the reception of broadcast signal receiver (53) broadcasting service；Reflecting
The modulated optical signal of uplink signal is carried out in formula semiconductor optical amplifier RSOA (56)By optical branching device (55), second thick
Wavelength division multiplexer (51) and profile fiber (40) return in distant-end node RN (30) again；It is first in distant-end node RN (30)
First pass through N × N array waveguide optical grating AWG (35) wavelength multiplexing, subsequent uplink signalPass through the 3rd optical loop
Optical line terminal is returned to by feeder fiber (20) after device (32), wave band obstructing instrument WB (33), the second Optical circulator (31)
(OLT)(10) ；
In optical line terminal (OLT) (10), uplink signalThrough the first Coarse Wave Division Multiplexer (19) and
First Optical circulator (18) is after 31 × N array waveguide optical grating AWG (16) demultiplexes, N roads uplink signalReceived respectively by N number of optical signal receiver (13)；
For the LAN service in network, wideband light source BLS (60) productions in N number of optical network unit ONU (50)
A raw wave-length coverage existsBroadband light carrier, afterwards broadband light carrier by electroabsorption modulator EAM (59) into
The modulation of row local area network signal, is then loaded with the broadband optical signal of LAN Information and passes through the 4th Optical circulator (57), second thick
Wavelength division multiplexer (51) and profile fiber (40) return in distant-end node RN (30) again；In distant-end node RN (30), N roads
The broadband optical signal for being loaded with LAN Information carries out frequency spectrum cutting by N × N array waveguide optical grating AWG (35) first, is passed through after
Cross the optical signal for being loaded with each optical network unit ONU (50) LAN Information of frequency spectrum cuttingExport to N × N
N number of input port of array waveguide grating AWG (35), wherein positioned at N × N array waveguide optical grating AWG (35) input port 1
LAN optical signalIt is filtered out by the 3rd Optical circulator (32) in wave band obstructing instrument WB (33), positioned at N × N array ripple
Guide grating AWG (35) input portLAN optical signalSeparated in optoisolator (34), position
In N × N array waveguide optical grating AWG (35) input portLAN optical signalPass through optoisolator
(34) N × N array waveguide optical grating AWG (35) input port is sent into afterwardsWavelength (de) multiplexing, the LAN letter after wavelength (de) multiplexing
Number with being loaded with the optical signal of downlink informationWith the optical signal for being loaded with broadcast singalIt is distributed together by N roots
Optical fiber (40) is transmitted to N number of optical network unit ONU (50)；The LAN optical signal in N number of optical network unit ONU (50)After the second Coarse Wave Division Multiplexer (51) wavelength (de) multiplexing, sent by the 4th Optical circulator (57)
Enter the 3rd Coarse Wave Division Multiplexer (58) wavelength (de) multiplexing again, the optical signal for being then loaded with LAN Information passes through local area network signal
Receiver (54) completes the reception of local area network signal.
Claims (2)
- A kind of 1. system that wavelength-division multiplex soft exchange net realizes inexpensive LAN service transmission, by optical line terminal (OLT) (10) a distant-end node RN (30) is connected by a feeder fiber (20), distant-end node RN (30) passes through profile fiber (40) It is connected to N number of optical network unit ONU (50), it is characterised in that：1) optical line terminal described in (OLT) (10) is by N number of optical signal transmitter (11), N number of distributed feedback laser DFB (12), N number of optical signal receiver (13), one 1 × N array waveguide optical grating AWG (14), a 21 × N array Waveguide optical grating AWG (15), 31 × N array waveguide optical grating AWG (16), a phase-modulator PM (17), one first Optical circulator (18), the first Coarse Wave Division Multiplexer (19) composition, in optical line terminal (OLT) (10), N number of optical signal hair Penetrate machine (11) and be connected to one 1 × N array waveguide optical grating AWG (14), the output of one 1 × N array waveguide optical grating AWG (14) connects The first Coarse Wave Division Multiplexer (19) is connected to, N number of distributed feedback laser DFB (12) is connected to 21 × N array waveguide optical grating The output of AWG (15), 21 × N array waveguide optical grating AWG (15) are connected to phase-modulator PM (17), phase-modulator PM (17) output is connected to the input terminal of the first Optical circulator (18), and N number of optical signal receiver (13) is connected to 31 × N times The output of train wave guide grating AWG (16), 31 × N array waveguide optical grating AWG (16) are connected to the defeated of the first Optical circulator (18) Outlet, the output of the first Optical circulator (18) are connected to the first Coarse Wave Division Multiplexer (19), the first Coarse Wave Division Multiplexer (19) Output is connected to distant-end node RN (30) by a feeder fiber (20)；2) the distant-end node RN (30) described in is by the second Optical circulator (31), the 3rd Optical circulator (32), wave band obstructing instrument WB (33), optoisolator (34), N × N array waveguide optical grating AWG (35) compositions, wherein, a feeder fiber (20) is connected to The input terminal of second Optical circulator (31), the output of the second Optical circulator (31) are connected to the 3rd Optical circulator (32), the 3rd light One of circulator (32) exports the input port 1 for being connected to N × N array waveguide optical grating AWG (35), and the other end is connected to wave band The output of obstructing instrument WB (33), wave band obstructing instrument WB (33) are connected to the output terminal of the second Optical circulator (31), N × N array ripple The input port of guide grating AWG (35)Optoisolator (34) is connected to, the output of optoisolator (34) is connected to N × N times The input port of train wave guide grating AWG (35), N number of output of N × N array waveguide optical grating AWG (35) passes through N roots point respectively Cloth optical fiber (40) is connected with N number of optical network unit ONU (50)；3) N number of optical network unit ONU (50) described in is second Coarse Wave Division Multiplexer by being connected with profile fiber (40) (51), a downstream signal reception machine (52), a broadcast signal receiver (53), a local area network signal receiver (54), One optical branching device (55), a reflective semiconductor optical amplifier RSOA (56), the 4th Optical circulator (57), one Three Coarse Wave Division Multiplexers (58), an electroabsorption modulator EAM (59) and wideband light source BLS (60) composition, the second thick ripple The output all the way of division multiplexer (51) is divided into two-way by optical branching device (55) and is respectively connected to a broadcast signal receiver (53) and a reflective semiconductor optical amplifier RSOA (56), the output of its another way are directly connected to the 4th Optical circulator (57), The output of 4th Optical circulator (57) is connected to the 3rd Coarse Wave Division Multiplexer (58), the 3rd Coarse Wave Division Multiplexer (58) it is defeated all the way Go out to be connected to downstream signal reception machine (52), its another way is exported by being connected to local area network signal receiver (54), broadband light The output of source BLS (60) is connected to electroabsorption modulator EAM (59), and the output of electroabsorption modulator EAM (59) is connected to the 4th Optical circulator (57).
- 2. a kind of method that wavelength-division multiplex soft exchange net realizes inexpensive LAN service transmission, using according to claim 1 institute The wavelength-division multiplex soft exchange net stated realizes that the system of inexpensive LAN service transmission carries out the transmission of broadcasting service, its feature exists In,One, produces that N is road-load uplink in N number of distributed feedback laser DFB (12) in optical line terminal (OLT) (10) The light wavelength lambda of broadcast message1 2,λ2 2…N roads light carrier passes through 21 × N array waveguide optical grating AWG (15) wavelength afterwards Multiplexing, multiplexed signal are connected to the modulation that phase-modulator PM (17) carries out broadcast singal, are loaded with upstream broadcast information Light wavelength lambda1 2,λ2 2…After the first Optical circulator (18), the first Coarse Wave Division Multiplexer (19) multiplexing, through feeder line light Fine (20) are transmitted to distant-end node RN (30)；In distant-end node RN (30), the light wavelength lambda for being loaded with upstream broadcast information in feeder fiber (20)1 2,λ2 2…Successively After the second Optical circulator (31) and the 3rd Optical circulator (32), demultiplexed by N × N array waveguide optical grating AWG (35) wavelength With rear, the light wavelength lambda of upstream broadcast information is loaded with1 2,λ2 2…N number of optical-fiber network list is sent to by N roots profile fiber (40) First ONU (50)；The optical wavelength of upstream broadcast information is loaded with N number of optical network unit ONU (50)(1≤n≤N) is second thick by one Two parts are divided into by optical branching device (55) after wavelength division multiplexer (51), wherein, a part is sent into broadcast signal receiver (53) and is used In the reception of broadcasting service, another part is sent into reflective semiconductor optical amplifier RSOA (56)；Two, modulate uplink signal, the transmission of the uplink and downlink business in network, N number of in optical line terminal (OLT) (10) Optical signal transmitter (11) produces the light wavelength lambda that N roads are each loaded with downlink information1 1,λ2 1…N roads optical signal passes through afterwards One one 1 × N array waveguide optical grating AWG (14) wavelength multiplexing, is sent into the first Coarse Wave Division Multiplexer (19) and passes through feedback after multiplexing Linear light fibre (20) is sent to distant-end node RN (30)；In distant-end node RN (30), the light wavelength lambda of downlink information is loaded with feeder fiber (20)1 1,λ2 1…Pass through the second light After circulator (31) and the 3rd Optical circulator (32), after N × N array waveguide optical grating AWG (35) wavelength (de) multiplexing, its N road Output is connected to N roots profile fiber (40), will be loaded with the optical wavelength of downlink informationWith the optical wavelength for being loaded with upstream broadcast information(1≤n≤N) is transmitted to N number of optical network unit ONU (50) together；The optical wavelength of downlink information is loaded with N number of optical network unit ONU (50)1≤n≤N passes through a second thick wavelength-division After multiplexer (51) wavelength (de) multiplexing, the 3rd Coarse Wave Division Multiplexer (58) wavelength solution again is sent into by the 4th Optical circulator (57) Multiplexing, is then loaded with downlink information and the reception of downlink signal is completed by downstream signal reception machine (52), and is loaded with upstream broadcast The optical wavelength of informationTwo parts are divided into by optical branching device (55), wherein, a part is sent into reflective semiconductor light amplification Device RSOA (56) is used for the modulation to uplink signal, and another part is sent into broadcast signal receiver (53) and is used for broadcasting service Receive；The modulated light for being loaded with upstream broadcast information of uplink signal is carried out in reflective semiconductor optical amplifier RSOA (56) WavelengthDistant-end node RN is returned to by optical branching device (55), the second Coarse Wave Division Multiplexer (51) and profile fiber (40) again (30) in；In distant-end node RN (30), first by N × N array waveguide optical grating AWG (35) wavelength multiplexing, then it is loaded with The light wavelength lambda of row broadcast message1 2,λ2 2…Pass through the 3rd Optical circulator (32), wave band obstructing instrument WB (33), the second optical loop Optical line terminal (OLT) (10) is returned to by feeder fiber (20) after device (31)；In optical line terminal (OLT) (10), the light wavelength lambda of upstream broadcast information is loaded with1 2,λ2 2…Answered through the first thick wavelength-division With device (19) and the first Optical circulator (18) after 31 × N array waveguide optical grating AWG (16) demultiplexes, N is road-load have on The light wavelength lambda of row broadcast message1 2,λ2 2…Received respectively by N number of optical signal receiver (13)；For the LAN service in network, the wideband light source BLS (60) in N number of optical network unit ONU (50) is produced three, One wave-length coverage is in λ1 1,Broadband light carrier, afterwards broadband light carrier pass through electroabsorption modulator EAM (59) carry out The modulation of local area network signal, the broadband optical signal for being then loaded with LAN Information pass through the 4th Optical circulator (57), the second thick ripple Division multiplexer (51) and profile fiber (40) return in distant-end node RN (30) again；In distant-end node RN (30), N is road-load The broadband optical signal for having LAN Information carries out frequency spectrum cutting by N × N array waveguide optical grating AWG (35) first, then passes through The light wavelength lambda for being loaded with downlink information for being loaded with each optical network unit ONU (50) LAN Information of frequency spectrum cutting1 1,Export to N number of input port of N × N array waveguide optical grating AWG (35), wherein positioned at N × N array waveguide optical grating The LAN of AWG (35) input port 1 is loaded with the optical wavelength of downlink informationBy the 3rd Optical circulator (32) in wave band Obstructing instrument WB (33) is filtered out, positioned at N × N array waveguide optical grating AWG (35) input portLAN be loaded with downlink information Light wavelength lambda1 1,Separated in optoisolator (34), positioned at N × N array waveguide optical grating AWG (35) input portLAN be loaded with the light wavelength lambda of downlink information1 1,N × N array waveguide is sent into by optoisolator (34) afterwards Grating AWG (35) input portWavelength (de) multiplexing, local area network signal after wavelength (de) multiplexing and the light for being loaded with downlink information SignalWith the optical wavelength for being loaded with upstream broadcast information(1≤n≤N) is transmitted to N number of light by N roots profile fiber (40) together Network unit ONU (50)；LAN is loaded with the optical wavelength of downlink information in N number of optical network unit ONU (50)After (1≤n≤N) is by the second Coarse Wave Division Multiplexer (51) wavelength (de) multiplexing, pass through the 4th Optical circulator (57) The 3rd Coarse Wave Division Multiplexer (58) wavelength (de) multiplexing again is sent into, the optical signal for being then loaded with LAN Information is believed by LAN Number receiver (54) completes the reception of local area network signal.
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