CN103634711B - Orthogonal frequency division multiplexing passive optical network system and its transmission method based on optical carrier suppression and subcarrier isolation technics - Google Patents
Orthogonal frequency division multiplexing passive optical network system and its transmission method based on optical carrier suppression and subcarrier isolation technics Download PDFInfo
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Abstract
The present invention relates to a kind of orthogonal frequency division multiplexing passive optical network system based on optical carrier suppression and subcarrier separation skill and its transmission method.The system uses optical line terminal, and by erbium-doped fiber amplifier, by two-way optical fiber link remote node of the connection, and distant-end node, by profile fiber connecting optical network unit group, each optical network unit group is made up of two optical network units.Optical line terminal increases Dare modulator, sine-wave generator, optical circulator, intensity modulator and receiver by distributed feedback laser, light Interleaver, tunable optical filter, circular array waveguide optical grating, circular array waveguide optical grating, Mach and constituted.The system employs Mach and increases Dare modulator, and the design of light Interleaver and optical network unit group realizes optical carrier suppression and subcarrier separation and colorless ONU, reduces system cost, be easy to system maintenance.
Description
Technical field
The present invention relates to optical communication field, it is specifically related to a kind of based on optical carrier suppression and subcarrier separation（OCSS）Skill
The orthogonal frequency division multiplexing passive optical network system and its transmission method of art, realize colourless optical network unit（ONU）Orthogonal frequency division multiplexing
Use EPON（OFDM-PON）Systemic-function.
Background technology
Access network is quickly grown as user terminal and the bridge of Metropolitan Area Network (MAN)/backbone network, particularly optical access network.In recent years,
A series of concept of optical access networks such as EPON, GPON, Hybrid WDM/TDM-PON, OFDM-PON is fast-developing.Based on light just
The division of time domain and frequency domain resource, and light OFDM frequency spectrums can neatly be carried out by handing over the access network technology of frequency division multiplexing (OFDM)
Efficiency high, capacity is big, it is possible to achieve varigrained scheduling of resource, disclosure satisfy that the service quality (QOS) and band of different business
Wide demand, causes the concern of numerous researchers and communication equipment business.And colorless ONU technology, be also PON key technology it
One.The present invention separates existing optical carrier suppression and subcarrier（OCSS）Technology application is into OFDM-PON, to system architecture
Rational layout is carried out, this system not only increases the utilization rate of fiber bandwidth, added the stability of system, and can
One photon carrier wave is only needed with each ONU neatly provided the user with multiple business, system, without distributing independent light source,
Colorless ONU is realized, system O＆M cost is reduced.
The content of the invention
It is an object of the invention to for realizing the deficiency that the OFDM-PON system schemas of colorless ONU are present, it is proposed that one
Plant and separated based on optical carrier suppression and subcarrier（OCSS）The orthogonal frequency division multiplexing passive optical network system of technology and its transmission side
Requirement of the ofdm system of colorless ONU to various device performances is realized in method, reduction, and reduces the dispersion of optical fiber and non-linear effect
Many-sided influence should be waited.
To reach above-mentioned purpose, idea of the invention is that：N number of distributed feedback laser is used in optical line terminal OLT
Device DFB launches the wavelength for being respectively at C-band and L-band, and is suppressed by both arms MZM modulator light carrier and produces son and carry
Ripple, finally produces 2N subcarrier.Reasonable arrangement light Interleaver in optical line terminal OLT and optical network unit group
IL, tunable optical filter TOF, circular array waveguide optical grating AWG, intensity modulator IM, Optical circulator, realize the colourless of system
ONUization.
Conceived according to foregoing invention, the present invention uses following scheme：
The orthogonal frequency division multiplexing passive optical network system realized based on optical carrier suppression and subcarrier isolation technics, by light net
Network terminal OLT passes through the first optical fiber by the first erbium-doped optical fiber amplifier EDFA 1 and the second erbium-doped optical fiber amplifier EDFA 2
Link and the second optical fiber link remote node of the connection RN, and distant-end node RN passes through first group of N roads profile fiber and second group of N road
Profile fiber connects N group optical network unit group ONU groups respectively, and every group of optical network unit is made up of two optical-fiber networks.Its feature exists
In：1）Described ONT Optical Network Terminal OLT：First distribution type feedback laser and the second distribution type feedback laser are connected to
FirstCircular array waveguide optical grating AWG1；FirstCircular array waveguide optical grating AWG1 and first Mach of increasing Dare are adjusted
MZM1 processed is connected；First Mach increases Dare modulation MZM1 signal drivings port and is connected with a sine-wave generator, first Mach
Increase Dare modulation MZM1 signal output ports and the first optical interferometer wave filter IL1 is connected；First smooth Interleaver IL1
The 1st signal output port and the first optic tunable filter TOF1 be connected, the first tunable optical filter TOF1 output port and
SecondCircular array waveguide optical grating AWG2 is connected, and secondCircular array waveguide optical grating AWG2 signal output port
It is connected with first group of N number of intensity modulator IM, the N number of intensity modulator IM of group signal output port and the 3rdCirculation
Array waveguide grating AWG3 is connected, and the 3rdCircular array waveguide optical grating AWG3 signal output part and the first optical circulator
OC1 is connected, the first optical circulator OC1 the 1st port and the 4thCircular array waveguide optical grating AWG4 is connected, and the 4th
Circular array waveguide optical grating AWG4 signal output port is connected with N group upward signal receivers RX；First optical circulator OC1's
2nd port is connected with the input port of the first erbium-doped optical fiber amplifier EDFA 1；First smooth Interleaver IL1 the 2nd signal
Output port and the second optic tunable filter TOF2 are connected, tunable optical filter TOF2 output port and the 5thCirculation
Array waveguide grating AWG5 is connected, and the 5thCircular array waveguide optical grating AWG5 signal output port and second group N number of strong
Spend modulator IM to be connected, the N number of intensity modulator IM of group signal output port and the 6thCircular array waveguide optical grating
AWG6 is connected, and the 6thCircular array waveguide optical grating AWG6 signal output part and the second optical circulator OC2 are connected, and second
Optical circulator OC2 the 1st signal output port and the 7thCircular array waveguide optical grating AWG7 is connected, and the 7thCirculation
Array waveguide grating AWG7 signal output port is connected with N group upward signal receivers RX；The 2nd of second optical circulator OC2
Port is connected with the input port of the second erbium-doped optical fiber amplifier EDFA 2；2）Distant-end node RN includes the 8thCyclic matrix train wave
Guide grating AWG8 and the 9thCircular array waveguide optical grating AWG9, the two circular array waveguide optical grating AWG pass through first group
N roads profile fiber and second group of N roads profile fiber difference connecting optical network unit group ONU group；3）Optical network unit group ONU groups
It is made up of two optical network units of the first optical network unit ONU and the second optical network unit ONU：One the 3rd optical circulator OC3
The 1st port be connected with the first optical power divider Splitter1；First optical power divider Splitter1 the 1st port and
First downstream signal reception machine RX_1 is connected；Reflective partly lead first optical power divider Splitter1 the 2nd port and second
Body image intensifer RSOA2 the 1st port is connected；Second reflective semiconductor optical amplifier RSOA2 the 2nd port and the 4th ring of light
Shape device OC4 the 2nd port is connected；4th optical circulator OC4 the 1st port is connected with the second optical power divider Splitter2；
Second optical power divider Splitter2 the 1st port is connected with the first downstream signal reception machine RX_N+1；Second luminous power point
Road device Splitter2 the 2nd port is connected with the first reflective semiconductor optical amplifier RSOA1 the 2nd port；First is reflective
Semiconductor optical amplifier RSOA1 the 1st port is connected with the 3rd optical circulator OC3 the 2nd port.
One kind is based on optical carrier suppression and subcarrier isolation technics（OCSS）Orthogonal frequency division multiplexing passive optical network
（OFDM-PON）System transmission method, is transmitted using said system, it is characterised in that：Described optical line terminal OLT
In N number of distributed feedback laser DFB distinguish output wavelength in the light of C-band and the light of L-band, pass through firstCirculation
Array waveguide grating AWG1 sends into first Mach and increases Dare modulation MZM1 progress carrier wave suppression, and first Mach increases Dare modulation MZM1
Export one group of N number of wavelength the light of C-band and one group of N number of wavelength L-band light.This two groups N number of carrier wave intervals are met freely
Spectral range FSR integral multiple, advantage of this is that utilizing circulating duct grating AWG；Increase Dare modulation by first Mach
MZM1 produce two groups of carrier waves, send into the first smooth Interleaver IL1, first Mach increase Dare modulate MZM1 by one just
String wave producer is driven, and two groups of carrier waves are isolated by the first optical interferometer wave filter IL1, and first group of carrier wave is adjustable by first
Optical filter TOF1, filters out light wave feeding secondCircular array waveguide optical grating AWG2, into first group of N number of intensity modulated
Device IM, second group of carrier wave passes through the second tunable optical filter TOF2, filters out light wave feeding the 5thCircular array waveguide optical grating
AWG5, into second group of N number of intensity modulator IM；Pass through the 3rd by first group of N number of intensity modulator IM signals modulatedCircular array waveguide optical grating AWG3, sends into the first optical circulator OC1, and the 2nd port by the first optical circulator OC1 is defeated
Go out, the first optical fiber link is injected after the optical signal amplification of the first erbium-doped optical fiber amplifier EDFA 1；First optical circulator OC1's
The upward signal of 1st port output passes through the 4thCircular array waveguide optical grating AWG4 demultiplex, feeding first group it is N number of on
Row signal receiver RX；Pass through the 6th by second group of N number of intensity modulator IM signals modulatedCircular array Waveguide
Grid AWG6, sends into the second optical circulator OC2, is exported by the second optical circulator OC2 the 2nd signal output port, by second
The second optical fiber link is injected after the optical signal amplification of erbium-doped optical fiber amplifier EDFA 2；Second optical circulator OC2 the 1st signal output
The upward signal of port output passes through the 7thCircular array waveguide optical grating AWG7 is demultiplexed, and sends into second group of N number of up letter
Number receiver RX；Composite signal is through the in distant-end node RN the 8th in first optical fiber link and the second optical fiber linkCyclic matrix
Train wave guide grating AWG8 and the 9thPass through first group of profile fiber and second after circular array waveguide optical grating AWG9 demultiplexings
Group profile fiber is sent to optical network unit group ONU groups；By the 8thCircular array waveguide optical grating AWG8 sends into optical-fiber network
The downstream signal of unit group ONU groups sends into the first optical power divider by the 3rd optical circulator OC3 the 1st port and is divided into two
Road：All the way as the demodulation of the first downstream signal reception device RX_1 in the first optical network unit ONU _ 1, another road is used as second
Second reflective semiconductor optical amplifier RSOA2 re-modulation up-link carrier in optical network unit ONU _ N+1；By the 9th
The downstream signal of circular array waveguide optical grating AWG9 feeding optical network unit group ONU groups passes through the 1st of the 4th optical circulator OC4
Port sends into the first optical power divider and is divided into two-way：All the way as the first descending letter in the first optical network unit ONU _ N+1
Number receiver RX_N+1 demodulation, another road is used as the first reflective semiconductor optical amplifier in the second optical network unit ONU _ 1
RSOA1 re-modulation up-link carrier.
The present invention compared with prior art, with following remarkable advantage：1）The system is very big using OFDM modulation techniques
Ground adds the capacity of system；2）The system is proposed realizes optical-fiber network with optical carrier suppression and subcarrier isolation technics OCSS
The decolorizable system of unit ONU, reduces system operation cost.
Brief description of the drawings
Fig. 1 is the orthogonal frequency division multiplexing passive optical network system based on optical carrier suppression and subcarrier isolation technics of the invention
System structural representation.
Fig. 2 is system optical network unit group structural representation in Fig. 1.
Embodiment
It is described with reference to the drawings, of the invention to be preferable to carry out example as follows：
Embodiment one：
Referring to Fig. 1 ~ Fig. 2, this orthogonal frequency division multiplexing passive optical network based on optical carrier suppression and subcarrier isolation technics
System, by ONT Optical Network Terminal OLT（4）By the first erbium-doped optical fiber amplifier EDFA 1（14）With the second erbium-doped fiber amplifier
EDFA2（28）Pass through the first optical fiber link（15）With the second optical fiber link（29）Remote node of the connection RN（16）, and distant-end node
RN（16）By first group of N roads profile fiber（18）With second group of N roads profile fiber（31）N group optical network unit groups are connected respectively
ONU groups（19）, every group of optical network unit be made up of two optical-fiber networks.ONT Optical Network Terminal OLT（4）：First distribution type feedback swashs
Light device（1）With the second distribution type feedback laser（2）It is connected to firstCircular array waveguide optical grating AWG1（3）；FirstCircular array waveguide optical grating AWG1（3）Increase Dare modulation MZM1 with first Mach（5）It is connected；First Mach increases Dare and adjusts
MZM1 processed（5）Signal drives port and a sine-wave generator（20）It is connected, first Mach increases Dare modulation MZM1（5）Signal
Output port and the first smooth Interleaver IL1（6）It is connected；First smooth Interleaver IL1（6）The 1st signal
Output port and the first tunable optical filter TOF1（7）Input port be connected, adjustable optical filtering ripple device TOF1 output port and
SecondCircular array waveguide optical grating AWG2（8）It is connected, secondCircular array waveguide optical grating AWG2（8）Signal it is defeated
Exit port and first group of N number of intensity modulator IM（9）It is connected, the N number of intensity modulator IM of the group（9）Signal output port and
ThreeCircular array waveguide optical grating AWG3（10）It is connected, the 3rdCircular array waveguide optical grating AWG3（10）Signal it is defeated
Go out end and the first optical circulator OC1（13）It is connected, the first optical circulator OC1（13）The 1st port and the 4thCircular array
Waveguide optical grating AWG4（12）It is connected, the 4thCircular array waveguide optical grating AWG4（12）Signal output port and N groups it is up
Signal receiver RX（11）It is connected；First optical circulator OC1（13）The 2nd port and the first erbium-doped optical fiber amplifier EDFA 1
（14）Input port is connected；First smooth Interleaver IL1（6）The 2nd signal output port and the second tunable optical filtering
Device TOF2（21）Input port be connected, the second tunable optical filter TOF2（21）Output port and the 5thCyclic matrix
Train wave guide grating AWG5（22）It is connected, the 5thCircular array waveguide optical grating AWG5（22）Signal output port and second
The N number of intensity modulator IM of group（23）It is connected, the N number of intensity modulator IM of the group（23）Signal output port and the 6thFollow
Ring array waveguide grating AWG6（24）It is connected, the 6thCircular array waveguide optical grating AWG6（24）Signal output part and
Two optical circulator OC2（27）It is connected, the second optical circulator OC2（27）The 1st signal output port and the 7thCircular array
Waveguide optical grating AWG7（26）It is connected, the 7thCircular array waveguide optical grating AWG7（26）Signal output port and N groups it is up
Signal receiver RX（25）It is connected；Second optical circulator OC2（27）The 2nd port and the second erbium-doped optical fiber amplifier EDFA 2
（28）Input port is connected；Distant-end node RN（16）Including the 8thCircular array waveguide optical grating AWG8（17）With the 9thCircular array waveguide optical grating AWG9（30）, the two circular array waveguide optical grating AWG pass through first group of N roads profile fiber
（18）With second group of N roads profile fiber（31）Difference connecting optical network unit group ONU groups（19）；Optical network unit group ONU groups
（19）By the first optical network unit ONU（36）With the second optical network unit ONU（41）Two optical network unit compositions：One the 3rd
Optical circulator OC3（32）The 1st port and the first optical power divider Splitter1（33）It is connected；First optical power divider
Splitter1（33）The 1st port and the first downstream signal reception machine RX_1（34）It is connected；First optical power divider
Splitter1（34）The 2nd port and the second reflective semiconductor optical amplifier RSOA2（40）The 1st port be connected；Second is anti-
Penetrate formula semiconductor optical amplifier RSOA2（40）The 2nd port and the 4th optical circulator OC4（37）The 2nd port be connected；4th light
Circulator OC4（37）The 1st port and the second optical power divider Splitter2（38）It is connected；Second optical power divider
Splitter2（38）The 1st port and the first downstream signal reception machine RX_N+1（39）It is connected；Second optical power divider
Splitter2（39）The 2nd port and the first reflective semiconductor optical amplifier RSOA1（35）The 2nd port be connected；First is anti-
Penetrate formula semiconductor optical amplifier RSOA1（35）The 1st port and the 3rd optical circulator OC3（32）The 2nd port be connected.
Embodiment two：
Referring to Fig. 1~Fig. 2, this orthogonal frequency division multiplexing passive optical network based on optical carrier suppression and subcarrier isolation technics
System transmission method, is operated using said system, it is characterised in that：Described optical line terminal OLT（4）In N number of point
Cloth feedback laser DFB, wherein the first distribution type feedback laser（1）With the second distribution type feedback laser（2）Point
Other output wavelength passes through first in the light of C-band and the light of L-bandCircular array waveguide optical grating AWG1（3）Feeding first
Mach increases Dare modulation MZM1（5）Carrier wave suppression is carried out, first Mach increases Dare modulation MZM1（5）One group of N number of wavelength is exported in C
The light of the light of wave band and one group of N number of wavelength in L-band.This two groups N number of carrier wave intervals meet free spectral range FSR integer
Times, advantage of this is that using circulating duct grating AWG,The port that can pass throughIt can also pass through；By first
Mach increases Dare modulation MZM1（5）The two groups of carrier waves produced send into the first smooth Interleaver IL1（6）, first Mach of increasing
Dare modulates MZM1（5）Occurred by a sine wave（20）Device drives, by the first smooth Interleaver IL1（6）Separation
Go out two groups of carrier waves, first group of carrier wave passes through the first tunable optical filter TOF1（7）Filter out light wave, feeding secondCyclic matrix
Train wave guide grating AWG2（8）, send into first group of N number of intensity modulator IM（9）, second group of carrier wave is by the second tunable optical filter
TOF2（21）Filter out light wave, feeding the 5thCircular array waveguide optical grating AWG5（22）, send into second group of N number of intensity modulated
Device IM（23）；By first group of N number of intensity modulator IM（9）The signal modulated passes through the 3rdCircular array waveguide optical grating
AWG3（10）, send into the first optical circulator OC1（13）, pass through the first optical circulator OC1（13）The output of the 2nd port, by the
One erbium-doped optical fiber amplifier EDFA 1（14）The first optical fiber link is injected after optical signal amplification（15）；First optical circulator OC1（13）
The 1st port output upward signal pass through the 4thCircular array waveguide optical grating AWG4（12）Demultiplexing, sends into first group
N number of upward signal receiver RX（11）；By second group of N number of intensity modulator IM（23）The signal modulated passes through the 6th
Circular array waveguide optical grating AWG6（24）, send into the second optical circulator OC2（27）, pass through the second optical circulator OC2（27）The 2nd
Port is exported, by the second erbium-doped optical fiber amplifier EDFA 2（28）The second optical fiber link is injected after amplification（29）；Second ring of light shape
Device OC2（27）The 1st port output upward signal pass through the 7thCircular array waveguide optical grating AWG7（26）Demultiplexing,
Send into second group of N number of upward signal receiver RX（25）；Composite signal is through distal end in first optical fiber link and the second optical fiber link
Node RN（16）In the 8thCircular array waveguide optical grating AWG8（17）With the 9thCircular array waveguide optical grating AWG9
（30）Pass through first group of profile fiber after demultiplexing respectively（18）With second group of profile fiber（31）Send to optical network unit group
ONU groups（19）；By the 8thCircular array waveguide optical grating AWG8（17）Send into optical network unit group ONU groups（19）Under
Row signal passes through the 3rd optical circulator OC3（32）The 1st port send into the first optical power divider be divided into two-way：All the way as
One optical network unit ONU _ 1（36）In the first downstream signal reception device RX_1（34）Input, another road is used as the second light net
Network unit ONU _ N+1（41）In the second reflective semiconductor optical amplifier RSOA2（40）Re-modulation up-link carrier；By the 9thCircular array waveguide optical grating AWG9（30）Send into optical network unit group ONU groups（19）Downstream signal pass through the 4th ring of light
Shape device OC4（37）The 1st port send into the first optical power divider be divided into two-way：All the way as the first optical network unit ONU _ N+
1（41）In the first downstream signal reception device RX_N+1（39）Input, another road is used as the first optical network unit ONU _ 1（36）
In the first reflective semiconductor optical amplifier RSOA1（35）Re-modulation up-link carrier；The transmission means of upward signal is descending
The inverse process of signal transmission.
Claims (2)
1. a kind of orthogonal frequency division multiplexing passive optical network system based on optical carrier suppression and subcarrier isolation technics, by a light
Network terminal OLT (4) passes through first erbium-doped optical fiber amplifier EDFA 1 (14) and second erbium-doped fiber amplifier
EDFA2 (28) connects a distant-end node RN by first optical fiber link (15) and second optical fiber link (29)
(16), and distant-end node RN (16) is connected respectively by first group of N roads profile fiber (18) and second group of N roads profile fiber (31)
N group optical network unit group ONU groups (19), every group of optical network unit is made up of two optical-fiber networks (36,41)；It is characterized in that：
1) the ONT Optical Network Terminal OLT (4) described in：There are the first distribution type feedback laser (1) and the second distribution type feedback to swash
Light device (2) is connected to the circular array waveguide optical grating AWG1 (3) of the first N × 1；The circular array waveguide optical grating AWG1 (3) of first N × 1
Increase Dare modulation MZM1 (5) with first Mach to be connected；This first Mach increases Dare modulation MZM1 (5) signal driving port and one
Sine-wave generator (20) is connected, and first Mach increases Dare modulation MZM1 (5) signal output ports and the first light intersection ripple
Division multiplexer IL1 (6) is connected；1st signal output port of the first smooth Interleaver IL1 (6) and one first can
The input port for dimming wave filter TOF1 (7) is connected, tunable optical filter TOF1 (7) output port and a 21 × N
Circular array waveguide optical grating AWG2 (8) be connected, 21 × N circular array waveguide optical grating AWG2 (8) signal output port and
First group of N number of intensity modulator IM (9) is connected, the signal output port and the 3rd N of the N number of intensity modulator IM (9) of the group
× 1 circular array waveguide optical grating AWG3 (10) is connected, the circular array waveguide optical grating AWG3 (10) of the 3rd N × 1 signal output
End is connected with a first optical circulator OC1 (13), first optical circulator OC1 (13) the 1st port and a 41 × N
Circular array waveguide optical grating AWG4 (12) is connected, 41 × N circular array waveguide optical grating AWG4 (12) signal output port
It is connected with N group upward signal receiver RX (11)；2nd port of the first optical circulator OC1 (13) and first er-doped
Fiber amplifier EDFA1 (14) input port is connected；2nd signal output part of the first smooth Interleaver IL1 (6)
Mouth is connected with the second tunable optical filter TOF2 (21) input port, second tunable optical filter TOF2 (21) output end
Mouth is connected with 51 × N circular array waveguide optical grating AWG5 (22), 51 × N circular array waveguide optical gratings AWG5
(22) signal output port and second group of N number of intensity modulator IM (23) is connected, this second group N number of intensity modulator IM (23)
Signal output port and the circular array waveguide optical grating AWG6 (24) of the 6th N × 1 be connected, the cyclic matrix train wave of the 6th N × 1
Guide grating AWG6 (24) signal output part and a second optical circulator OC2 (27) are connected, second optical circulator OC2 (27)
The 1st signal output port and 71 × N circular array waveguide optical grating AWG7 (26) be connected, 71 × N circular array waveguides
Grating AWG7 (26) signal output port is connected with N group upward signal receiver RX (25)；The second optical circulator OC2
(27) the 2nd port is connected with described (28) input port of second erbium-doped optical fiber amplifier EDFA 2；
2) the distant-end node RN (16) include 81 × N circular array waveguide optical grating AWG8 (17) and one the 9th 1 ×
N circular array waveguide optical grating AWG9 (30), the two circular array waveguide optical gratings AWG (17,30) are distributed light by first group of N road
Fine (18) and second group of N roads profile fiber (31) connect the optical network unit group ONU groups (19) respectively；
3) the optical network unit group ONU groups (19) are by the first optical network unit ONU (36) and the second optical network unit ONU (41)
Two optical network unit compositions：One the 3rd optical circulator OC3 (32) the 1st port and first optical power divider
Splitter1 (33) is connected；1st port of the first optical power divider Splitter1 (33) and one first descending letter
Number receiver RX_1 (34) is connected；2nd port of the first optical power divider Splitter1 (33) and one second reflection
Formula semiconductor optical amplifier RSOA2 (40) the 1st port is connected；The second reflective semiconductor optical amplifier RSOA2 (40)
The 2nd port be connected with the 4th optical circulator OC4 (37) the 2nd port；4th optical circulator OC4 (37) the 1st port and one
Individual second optical power divider Splitter2 (38) is connected；Second optical power divider Splitter2 (38) the 1st port and
One the first downstream signal reception machine RX_N+1 (39) is connected；Second optical power divider Splitter2 (38) the 2nd port and
One the first reflective semiconductor optical amplifier RSOA1 (35) the 1st port is connected；First reflective semiconductor optical amplifier
RSOA1 (35) the 2nd port is connected with the 2nd port of the 3rd optical circulator OC3 (32).
2. a kind of orthogonal frequency division multiplexing passive optical network transmission method based on optical carrier suppression and subcarrier isolation technics, is used
Orthogonal frequency division multiplexing passive optical network system according to claim 1 based on optical carrier suppression and subcarrier isolation technics
Operated, it is characterised in that：N number of distributed feedback laser DFB in optical line terminal OLT (4), wherein the first component cloth
Formula feedback laser (1) and the second distribution type feedback laser (2) distinguish output wavelength in the light of C-band and the light of L-band,
Modulate MZM1 (5) by the first N × 1 circular array waveguide optical grating AWG1 (3) feedings, first Mach of increasing Dare and carry out carrier wave suppression,
First Mach increase Dare modulation MZM1 (5) export one group of N number of wavelength the light of C-band and one group of N number of wavelength L-band light,
This two groups N number of carrier wave intervals meet free spectral range FSR integral multiple；Increase Dare modulation MZM1 (5) by first Mach to produce
Two groups of carrier waves send into the first smooth Interleaver IL1 (6), first Mach increase Dare modulation MZM1 (5) by a sine
The driving of (20) device occurs for ripple, and two groups of carrier waves are isolated by the first smooth Interleaver IL1 (6), and first group of carrier wave passes through
First optic tunable filter TOF1 (7) filters out light wave, feeding 21 × N circular array waveguide optical grating AWG2 (8), feeding first
The N number of intensity modulator IM (9) of group, second group of carrier wave filters out light wave, feeding the 5th 1 by the second optic tunable filter TPF2 (21)
× N circular array waveguide optical grating AWG5 (22), send into second group of N number of intensity modulator IM (23)；By first group of N number of intensity modulated
The signal that device IM (9) is modulated sends into the first optical circulator OC1 by the circular array waveguide optical grating AWG3 (10) of the 3rd N × 1
(13), exported, believed by first erbium-doped optical fiber amplifier EDFA 1 (14) light by the first optical circulator OC1 (13) the 2nd port
Number amplification after inject the first optical fiber link (15)；The upward signal of first optical circulator OC1 (13) the 1st port output passes through the
41 × N circular array waveguide optical grating AWG4 (12) are demultiplexed, and send into first group of N number of upward signal receiver RX (11)；By second
The signal that the N number of intensity modulator IM (23) of group modulates is by the circular array waveguide optical grating AWG6 (24) of the 6th N × 1, feeding the
Two optical circulator OC2 (27), are exported by the second optical circulator OC2 (27) the 2nd port, by the second erbium-doped fiber amplifier
The second optical fiber link (29) is injected after EDFA2 (28) amplifications；The up letter of second optical circulator OC2 (27) the 1st port output
Number process 71 × N circular array waveguide optical grating AWG7 (26) demultiplexing, sends into second group of N number of upward signal receiver RX
(25)；Composite signal is through 81 × N cyclic matrix train waves in distant-end node RN (16) in first optical fiber link and the second optical fiber link
Pass through the first component lighting respectively after guide grating AWG8 (17) and 91 × N circular array waveguide optical grating AWG9 (30) demultiplexings
Fine (18) and second group of profile fiber (31) are sent to optical network unit group ONU groups (19)；By 81 × N circular array waveguides
The downstream signal of grating AWG8 (17) feeding optical network unit group ONU groups (19) passes through the 3rd optical circulator OC3 (32) the 1st end
Mouth the first optical power divider of feeding is divided into two-way：All the way as the first descending letter in the first optical network unit ONU _ 1 (36)
Number receiver RX_1 (34) input, another road is used as the second reflective semiconductor in the second optical network unit ONU _ N+1 (41)
Image intensifer RSOA2 (40) re-modulation up-link carrier；Light net is sent into by 91 × N circular array waveguide optical grating AWG9 (30)
The downstream signal of network unit group ONU groups (19) sends into the first luminous power branch by the 4th optical circulator OC4 (37) the 1st port
Device is divided into two-way：All the way as the first downstream signal reception device RX_N+1 (39) in the first optical network unit ONU _ N+1 (41)
Input, another road is used as the first reflective semiconductor optical amplifier RSOA1 (35) in the first optical network unit ONU _ 1 (36)
Re-modulation up-link carrier；The transmission means of upward signal is the inverse process of downstream signal transmission.
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| CN101924963A (en) * | 2010-09-21 | 2010-12-22 | 上海交通大学 | OFDMA (Orthogonal Frequency Division Multiplex Address)-based mixed passive optical network transmission system |
| CN102769807A (en) * | 2012-07-10 | 2012-11-07 | 上海大学 | Light source centralization orthogonal frequency division multiplexing passive optical network system and transmission method |
| CN102802093A (en) * | 2012-07-11 | 2012-11-28 | 上海大学 | System with orthogonal frequency division multiplexing (OFDM) passive optical network protection function and transmission method |
| CN102820945A (en) * | 2012-08-24 | 2012-12-12 | 武汉邮电科学研究院 | Passive optical network system based on Nyquist wavelength division multiplexing and realization method |
| CN103001911A (en) * | 2012-11-05 | 2013-03-27 | 上海大学 | Autocorrelation detection orthogonal frequency division multiplexing passive optical network system and autocorrelation detection orthogonal frequency division multiplexing passive optical network transmission method |
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| CN101924963A (en) * | 2010-09-21 | 2010-12-22 | 上海交通大学 | OFDMA (Orthogonal Frequency Division Multiplex Address)-based mixed passive optical network transmission system |
| CN102769807A (en) * | 2012-07-10 | 2012-11-07 | 上海大学 | Light source centralization orthogonal frequency division multiplexing passive optical network system and transmission method |
| CN102802093A (en) * | 2012-07-11 | 2012-11-28 | 上海大学 | System with orthogonal frequency division multiplexing (OFDM) passive optical network protection function and transmission method |
| CN102820945A (en) * | 2012-08-24 | 2012-12-12 | 武汉邮电科学研究院 | Passive optical network system based on Nyquist wavelength division multiplexing and realization method |
| CN103001911A (en) * | 2012-11-05 | 2013-03-27 | 上海大学 | Autocorrelation detection orthogonal frequency division multiplexing passive optical network system and autocorrelation detection orthogonal frequency division multiplexing passive optical network transmission method |
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