CN104320725A

CN104320725A - Orthogonal frequency division multiplexing passive optical network system based on polarization technique and photoproduction millimeter wave and transmission method thereof

Info

Publication number: CN104320725A
Application number: CN201410147445.2A
Authority: CN
Inventors: 费玥; 伍仕宝; 李玉龙; 胡发泽; 李振宇
Original assignee: University of Shanghai for Science and Technology
Current assignee: University of Shanghai for Science and Technology
Priority date: 2014-04-14
Filing date: 2014-04-14
Publication date: 2015-01-28

Abstract

The present invention relates to an orthogonal frequency division multiplexing passive optical network system based on a polarization technique and a photoproduction millimeter wave and a transmission method thereof. The present system is: an optical line terminal is connected to a remote node via two optical fibre links through two erbium-doped optical fiber amplifiers, while the remote node is connected to N optical network unit groups via N*2 profile fibers, and each optical network unit group consists of two optical network units. The present system uses a design of a Mach-Zehnder modulator, an optical cross wavelength division multiplexer, the polarization technique and the optical network unit group, achieves optical carrier suppression, subcarrier separation, a 60 GHz photoproduction millimeter wave and a colorless ONU, reduces the cost of the system, and is convenient for maintaining the system. The present system further reduces reverse Rayleigh scattering, and achieves the orthogonal frequency-division passive optical network system of the photoproduction millimeter wave.

Description

Based on orthogonal frequency division multiplexing passive optical network system and the transmission method thereof of polarization technology and photoproduction millimeter wave

Technical field

The present invention relates to optical communication field, specifically relate to a kind of orthogonal frequency division multiplexing passive optical network system based on polarization technology and Optical Generation of Millimeter Wave Signals and transmission method thereof, realize 60GHz photoproduction millimeter wave and non-colored light network element (ONU) orthogonal frequency division multiplexing passive optical network (OFDM-PON) systemic-function.

Background technology

Access Network as the bridge of user side and metropolitan area network/backbone network, development rapidly, particularly optical access network.In recent years, the concept of a series of optical access network such as EPON, GPON, Hybrid WDM/TDM-PON, OFDM-PON is fast-developing.Access network technology based on light OFDM (OFDM) can carry out the division of time domain and frequency domain resource neatly, and light OFDM spectrum efficiency is high, capacity is large, varigrained scheduling of resource can be realized, service quality (QOS) and the bandwidth demand of different business can be met, cause the concern of numerous researcher and communication equipment business.And colorless ONU technology, be also one of key technology of PON.The present invention applies to existing polarization control technology in OFDM-PON, rational layout has been carried out to system architecture, this system not only increases the utilance of fiber bandwidth, add the stability of system, decrease the crosstalk between upward signal, and multiple business can be provided to user neatly, each ONU in system only needs a photon carrier wave, without the need to distributing independent light source, achieving colorless ONU, reducing system O&M cost.

Summary of the invention

The object of the invention is to the deficiency existed for the OFDM-PON system schema realizing colorless ONU, propose a kind of orthogonal frequency division multiplexing passive optical network system based on polarization technology and Optical Generation of Millimeter Wave Signals and transmission method thereof, reduce realize colorless ONU ofdm system to the requirement of various device performance, and reduce many-sided impact such as Dispersion and non-linearity effects of optical fiber.

For achieving the above object, design of the present invention is: at optical line terminal OLT adopt N number of distributed feedback laser DFB to launch light that two groups of wavelength differ 60GHz respectively, and suppressed and produce subcarrier by both arms MZM modulator light carrier, finally produce 2N subcarrier.Reasonable arrangement light Interleaver IL, circular array waveguide optical grating AWG, signal madulation module, Optical circulator in optical line terminal OLT and optical network unit group, realize the colorless ONU of system.

According to foregoing invention design, the present invention adopts following scheme:

This is based on the orthogonal frequency division multiplexing passive optical network system of polarization technology and photoproduction millimeter wave, a far away end node RN is connected by first optical fiber link with second optical fiber link with second erbium-doped optical fiber amplifier EDFA 2 through first erbium-doped optical fiber amplifier EDFA 1 by an Optical Network Terminal OLT, and distant-end node RN is connected N group optical network unit group ONU group respectively through first group of N road profile fiber and second group of N road profile fiber, often organize optical network unit to be made up of two optical-fiber networks, it is characterized in that: the Optical Network Terminal OLT 1): have distributed feedback laser group DFB to be connected to first circular array waveguide optical grating AWG1, first circular array waveguide optical grating AWG1 increases Dare and modulates MZM1 with first Mach and be connected, this first Mach increases Dare modulation MZM1 signal and drives port to be connected with a primary sinusoid generator RF1, and first Mach increases Dare modulation MZM1 signal output port and be connected with a first smooth Interleaver IL1, 1st signal output port of this first smooth Interleaver IL1 and one second circular array waveguide optical grating AWG2 is connected, and this is second years old the signal output port of circular array waveguide optical grating AWG2 is connected with one group of N number of signal madulation module, the signal output port of the N number of signal madulation module of this group and one the 3rd circular array waveguide optical grating AWG3 is connected, and the 3rd the signal output part of circular array waveguide optical grating AWG3 is connected with a first optical circulator Cir1, and the 1st port of this first optical circulator Cir1 is connected with receiver 1, 2nd port of described first optical circulator Cir1 is connected with described first erbium-doped optical fiber amplifier EDFA 1 input port, 2nd signal output port of described first smooth Interleaver IL1 and one the 4th circular array waveguide optical grating AWG4 is connected, and the 4th the signal output port of circular array waveguide optical grating AWG4 is connected with second group of N number of signal madulation module, the signal output port of this second group N number of signal madulation module and one the 5th circular array waveguide optical grating AWG5 is connected, and the 5th the signal output part of circular array waveguide optical grating AWG5 is connected with a second optical circulator Cir2, and the 1st signal output port of this second optical circulator Cir2 is connected with receiver 2, 2nd port of described second optical circulator Cir2 is connected with described second erbium-doped optical fiber amplifier EDFA 2 input port, 2) described distant-end node RN comprises one the 6th circular array waveguide optical grating AWG6 and one the 7th circular array waveguide optical grating AWG7, these two circular array waveguide optical grating AWG are connected described optical network unit group ONU group by first group of N road profile fiber respectively with second group of N road profile fiber, 3) described signal madulation module: have a second smooth Interleaver IL2, 1 port of this second smooth Interleaver IL2 is connected with a first optical power divider SP1, output 1 port of this first optical power divider SP1 is connected with a first Polarization Controller PC_X1, this first Polarization Controller PC_X1 is connected with input 1 port of a first intensity modulator IM1, the output port of this first intensity modulator IM1 is connected with a first optical filter OF1, the output port of this first optical filter OF1 is connected with input 1 port of a first polarization beam combiner PBC1, output 2 port of described first optical power divider SP1 is connected with a first Polarization Controller PC_Y2, this first Polarization Controller PC_Y2 is connected with input 1 port of a second intensity modulator IM2, the output port of this second intensity modulator IM2 is connected with a second optical filter OF2, and the output port of this second optical filter OF2 is connected with input 2 port of a first polarization beam combiner PBC1, a second sine-wave generator RF2 is had to be connected with a second optical power divider SP2,1 output port of this second optical power divider SP2 is connected with an OFDM upconvert baseband signals device, and the output port of an OFDM upconvert baseband signals device is connected with input 2 port of the first intensity modulator IM1, 2 output ports of described second optical power divider SP2 are connected with 2 input 2 ports of the second intensity modulator IM2, the output port of described first polarization beam combiner PBC1 is connected with input 1 port of the first optical coupler OC1, described 2 ports of the second smooth Interleaver IL2 are connected with input 2 port of the first optical coupler OC1, the output port of this first optical coupler OC1 is connected with a 3rd optical filter OF3, 4) described optical network unit group ONU group is made up of the first optical network unit ONU 1 and the second optical network unit ONU 2 two optical network units: the 1st port of a 3rd optical circulator OC3 is connected with a second optical power divider SP2, 1st port of described second optical power divider SP2 is connected with a first photoproduction millimeter wave new processor 1, this first light remains millimeter wave processor 1 and is connected with a first low pass filter LPF1, and this first low pass filter LPF1 is connected with 2 ports of a first smooth selector switch, 2nd port of described second optical power divider SP2 is connected with a 3rd smooth Interleaver IL3, output 1 port of the 3rd smooth Interleaver IL3 is connected with a first descending OFDM new receiver 1, this first descending OFDM new receiver 1 is connected with an OFDM Tx1, and an OFDM Tx1 is connected with 1 port of described first smooth selector switch, this first smooth selector switch is connected with a first reflective semiconductor optical amplifier RSOA1's, 1 port of this first reflective semiconductor optical amplifier RSOA1 is connected with 2 ports of described 3rd smooth Interleaver IL3, and 2 ports of described first reflective semiconductor optical amplifier RSOA1 are connected with the 2nd port of the 4th optical circulator Cir4, 1 port of the 4th optical circulator Cir4 is connected with a 3rd optical power divider SP3, 1 port of the 3rd optical power divider SP3 is connected with a 4th smooth Interleaver IL4, and output 1 port of the 4th smooth Interleaver IL4 is connected with 1 port of a second reflective semiconductor optical amplifier RSOA2, 2 ports of this second reflective semiconductor optical amplifier RSOA2 are connected with described 3rd optical circulator Cir3, output 2 port of described 4th smooth Interleaver IL4 is connected with a second descending ofdm signal receiver 2, this second descending ofdm signal receiver 2 is connected with a 2nd OFDM Tx2, and the 2nd OFDM Tx2 is connected with 2 ports of second optical signal switch 2, 2 ports of described 3rd optical power divider SP3 are connected with a second photoproduction millimeter-wave signal processor 2, this the second photoproduction millimeter-wave signal processor 2 is connected with a second low pass filter LPF2, and this second low pass filter LPF2 is connected with 1 port of described second optical signal switch 2, this second optical signal switch 2 is connected with described second reflective semiconductor optical amplifier RSOA2,

This is based on the orthogonal frequency division multiplexing passive optical network transmission method of polarization technology and photoproduction millimeter wave, the orthogonal frequency division multiplexing passive optical network system based on polarization technology and photoproduction millimeter wave according to claim 1 is adopted to operate, it is characterized in that: N number of distributed feedback laser DFB in optical line terminal OLT, the wherein light of the first distribution type feedback laser and second component cloth feedback laser difference output wavelength difference 60GHz, by first circular array waveguide optical grating AWG1 sends into first Mach of increasing Dare modulation MZM1 and carries out carrier wave suppression, and first Mach increases the light that Dare modulation MZM1 exports two groups of N number of wavelength, these two groups of light difference 60GHz.This two groups of N number of carrier spacings meet the integral multiple of free spectral range FSR, and the benefit done like this utilizes circulating duct grating AWG, the port that can pass through also can pass through; The two groups of carrier waves increasing Dare modulation MZM1 generation by first Mach send into the first smooth Interleaver IL1, first Mach increases Dare modulation MZM1 and is driven by a sine-wave generator, isolate two groups of carrier waves through the first smooth Interleaver IL1, first group of carrier wave is through second circular array waveguide optical grating AWG2, send into first group of N number of signal madulation module, the signal sending into first group of N number of signal madulation module differs separately being exported of 60GHz through a second optical veneer IL2, by the light that the second optical veneer IL21 port exports, send into a first optical power divider SP1, the light exported by 1 port of the first optical power divider SP1, through a first optical polarization controller PC_X1, sends into 1 input port of the first light intensity modulator IM1; The sine wave that second sine-wave generator RF2 generates, send into the second optical power divider SP2, the signal of the 1 port output of the second optical power divider SP2, send into an OFDM upconvert baseband signals device, by the signal that an OFDM upconvert baseband signals device exports, send into 2 ports of the first light intensity modulator IM1, the light signal that first light intensity modulator IM1 generates, send into the first optical filter OF1, the signal exported through the first optical filter OF1 sends into 1 port of the first light polarization beam combiner PBC1; The flashlight of the 2 ports outputs of the first optical power divider SP1, through the second optical polarization controller PC_Y2, sends into 1 input port of the second light intensity modulator IM2; The signal of the 2 ports outputs of the second optical power divider SP2, send into 2 ports of the second light intensity modulator IM2, through the signal that the second optical power divider SP2 modulates, send into the second optical filter OF2, the signal exported through the second optical filter OF2 sends into 2 ports of the first light polarization beam combiner PBC1; Through the signal that the first light polarization beam combiner PBC1 exports, send into 1 port of the first optical coupler OC1; The light of the 2 ports outputs of the second optical veneer IL2, send into 2 ports of the first optical coupler OC1, through the signal that the first optical coupler OC1 exports, send into the 3rd optical filter OF3, the signal through the 3rd optical filter OF3 exports, and sends into the 3rd circular array waveguide optical grating AWG3; Second group through the 4th circular array waveguide optical grating AWG4, sends into second group of N number of signal madulation module; The signal modulated by first group of N number of signal madulation module is through the 3rd circular array waveguide optical grating AWG3, sends into the first optical circulator Cir1, is exported, after the first erbium-doped optical fiber amplifier EDFA 1 optical signal amplification, inject the first optical fiber link by the 2nd port of the first optical circulator Cir1; The upward signal that 1st port of the first optical circulator Cir1 exports sends into receiver 1; The signal modulated by second group of N number of signal madulation module is through the 5th circular array waveguide optical grating AWG5, sends into the second optical circulator Cir2, is exported, after the second erbium-doped optical fiber amplifier EDFA 2 amplifies, inject the second optical fiber link by the 2nd port of the second optical circulator Cir2; The upward signal that 1st port of the second optical circulator Cir2 exports sends into receiver 2; In first optical fiber link and the second optical fiber link, composite signal is in distant-end node RN the 6th circular array waveguide optical grating AWG6 and the 7th optical network unit group ONU group is sent to respectively by first group of profile fiber and second component cloth optical fiber after circular array waveguide optical grating AWG7 demultiplexing; By the 6th the downstream signal that circular array waveguide optical grating AWG6 sends into optical network unit group ONU group sends into the 3rd optical power divider SP3 through 1 port of the 3rd optical circulator Cir3, through the signal that 1 port of the 3rd optical power divider SP3 exports, send into the first photoproduction millimeter-wave signal processor 1, through the signal of the first photoproduction millimeter-wave signal processor 1 process, send into the first low pass filter LPF1, through the signal of the first low pass filter LPF1 process, send into 2 ports of the first optical switch 1; Through the signal that 2 ports of the 3rd optical power divider SP3 export, through the signal that 1 port of the 3rd smooth Interleaver IL3 exports, send into the first descending ofdm signal receiver 1, the signal exported through the first descending ofdm signal receiver 1 sends into an OFDM Tx1, through the signal of an OFDM Tx1, send into 1 port of the first optical switch 1, the signal that the first optical switch 1 exports, send into the first reflectivity semiconductor optical amplifier RSOA1; The signal of the 2 ports outputs of the 3rd smooth Interleaver IL3, send into 1 port of the first reflectivity semiconductor optical amplifier RSOA1, through the signal that 2 ports of the first reflectivity semiconductor optical amplifier RSOA1 export, send into 2 ports of the 4th optical circulator Cir4; Through the signal that 1 port of the 4th optical circulator Cir4 exports, send into the 4th optical power divider SP4, through the signal that 1 port of the 3rd optical power divider SP3 exports, send into the 4th smooth Interleaver IL4, the signal that 1 port entering the 4th smooth Interleaver IL4 exports, sends into 1 port of the second reflectivity semiconductor optical amplifier RSOA2; The signal of the 2 ports outputs of the 4th smooth Interleaver IL4, by the second descending ofdm signal receiver 2, sends into the 2nd OFDM Tx2, through the signal that the 2nd OFDM Tx2 exports, sends into 2 ports of the second optical switch 2; Through the signal that 2 ports of the 3rd optical power divider SP3 export, send into the second photoproduction millimeter-wave signal processor 2, through the signal of the second photoproduction millimeter-wave signal processor 2 process, by the second low pass filter LPF2, send into 1 port of the second optical switch 2, through the signal that the second optical switch 2 exports, send into the second reflectivity semiconductor optical amplifier RSOA2, the signal of the 2 ports outputs of the second reflectivity semiconductor optical amplifier RSOA2, sends 2 ports of the 3rd optical circulator Cir3 to.

The present invention compared with prior art, has following apparent outstanding substantive distinguishing features and remarkable advantage: 1) native system utilizes OFDM modulation technology to substantially increase the capacity of system; 2) native system proposes and uses polarization control technology to realize the decolorizable system of optical network unit ONU, reduces system operation cost; 3) native system utilizes different wavelength to transmit uplink and downlink signals on different optical fiber, reduces the interference between signal, improves the transmission performance of system.

Accompanying drawing explanation

Fig. 1 is the orthogonal frequency division multiplexing passive optical network system configuration schematic diagram based on polarization technology and photoproduction millimeter wave of the present invention.

Fig. 2 is signal madulation module diagram in figure mono-system.

Fig. 3 is system optical network unit group structural representation in Fig. 1.

Fig. 4 is descending ofdm signal receiver schematic diagram in Fig. 3.

Embodiment

Accompanying drawings, preferred exemplifying embodiment of the present invention is as follows:

Embodiment one:

See Fig. 1 ~ Fig. 4, this is based on the orthogonal frequency division multiplexing passive optical network system of polarization technology and photoproduction millimeter wave, by an ONT Optical Network Terminal OLT(1) through a first erbium-doped optical fiber amplifier EDFA 1(12) with a second erbium-doped optical fiber amplifier EDFA 2(23) be connected an end node RN(14 far away by first optical fiber link (13) with second optical fiber link (24)), and distant-end node RN(14) be connected N group optical network unit group ONU group (17) respectively through first group of N road profile fiber (16) and second group of N road profile fiber (26), often organize optical network unit by two optical-fiber networks (41, 54) form, it is characterized in that: the ONT Optical Network Terminal OLT(1 1)): have distributed feedback laser group DFB(2) be connected to first circular array waveguide optical grating AWG1(3), first circular array waveguide optical grating AWG1(3) increase Dare modulate MZM1(5 with first Mach) be connected, this first Mach increases Dare modulation MZM1(5) signal drives port and a primary sinusoid generator RF1(4) be connected, first Mach increases Dare and modulates MZM1(5) signal output port and a first smooth Interleaver IL1(6) be connected, this first smooth Interleaver IL1(6) the 1st signal output port and one second circular array waveguide optical grating AWG2(7) be connected,This is second years old Circular array waveguide optical grating AWG2(7) signal output port be connected with one group of N number of signal madulation module (8), the signal output port of the N number of signal madulation module (8) of this group and one the 3rd Circular array waveguide optical grating AWG3(10) be connected, the 3rd Circular array waveguide optical grating AWG3(10) signal output part and a first optical circulator Cir1(11) be connected, this first optical circulator Cir1(11) the 1st port and receiver 1(9) be connected; Described first optical circulator Cir1(11) the 2nd port and described first erbium-doped optical fiber amplifier EDFA 1(11) input port is connected; Described first smooth Interleaver IL1(6) the 2nd signal output port and one the 4th Circular array waveguide optical grating AWG4(18) be connected, the 4th Circular array waveguide optical grating AWG4(18) signal output port be connected with second group of N number of signal madulation module (19), the signal output port of this second group N number of signal madulation module (19) and one the 5th Circular array waveguide optical grating AWG5(21) be connected, the 5th Circular array waveguide optical grating AWG5(21) signal output part and a second optical circulator Cir2(22) be connected, this second optical circulator Cir2(22) the 1st signal output port and receiver 2(20) be connected; Described second optical circulator Cir2(22) the 2nd port and described second erbium-doped optical fiber amplifier EDFA 2(23) input port is connected; 2) described distant-end node RN(14) comprise one the 6th Circular array waveguide optical grating AWG6(15) and one the 7th Circular array waveguide optical grating AWG7(25), these two circular array waveguide optical grating AWG(15,25) be connected described optical network unit group ONU group (17) by first group of N road profile fiber (16) respectively with second group of N road profile fiber (26); 3) described signal madulation module (8,19): have a second smooth Interleaver IL2(27),This second smooth Interleaver IL2(27) 1 port and a first optical power divider SP1(28) be connected, this first optical power divider SP1(28) output 1 port and a first Polarization Controller PC_X1(29) be connected, this first Polarization Controller PC_X1(29) with a first intensity modulator IM1(31) input 1 port be connected, this first intensity modulator IM1(31) output port and a first optical filter OF1(32) be connected, this first optical filter OF1(32) output port and a first polarization beam combiner PBC1(33) input 1 port be connected, described first optical power divider SP1(28) output 2 port and a first Polarization Controller PC_Y2(30) be connected, this first Polarization Controller PC_Y2(30) with a second intensity modulator IM2(37) input 1 port be connected, this second intensity modulator IM2(37) output port and a second optical filter OF2(38) be connected, this second optical filter OF2(38) output port and a first polarization beam combiner PBC1(33) input 2 port be connected, have a second sine-wave generator RF2(34) with a second optical power divider SP2(35) be connected, this second optical power divider SP2(35) 1 output port be connected with an OFDM upconvert baseband signals device (36), the output port of an OFDM upconvert baseband signals device (36) and the first intensity modulator IM1(31) input 2 port be connected, described second optical power divider SP2(35) 2 output ports and the second intensity modulator IM2(37) 2 input 2 ports be connected, described first polarization beam combiner PBC1(33) output port and the first photo-coupler OC1(39) input 1 port be connected, described second smooth Interleaver IL2(27) 2 ports and the first photo-coupler OC1(39) input 2 port be connected, this first photo-coupler OC1(39) output port and a 3rd optical filter OF3(40) be connected, 4) described optical network unit group ONU group (17) is by the first optical network unit ONU 1(41) with the second optical network unit ONU 2(54) two optical network units form: the 1st port a 3rd optical circulator OC3(42) and a second optical power divider SP2(43) be connected, described second optical power divider SP2(43) the 1st port and a first photoproduction millimeter wave new processor 1(44) be connected, this first light remains millimeter wave processor 1(44) with a first low pass filter LPF1(47) be connected, this first low pass filter LPF1(47) be connected with 2 ports of a first smooth selector switch (52), described second optical power divider SP2(43) the 2nd port and a 3rd smooth Interleaver IL3(49) be connected,3rd smooth Interleaver IL3(49) output 1 port and a first descending OFDM new receiver 1(45) be connected, this first descending OFDM new receiver 1(45) with an OFDM Tx1(46) be connected, an OFDM Tx1(46) be connected with 1 port of described first smooth selector switch (52); This first smooth selector switch (52) and a first reflective semiconductor optical amplifier RSOA1(51) be connected; This first reflective semiconductor optical amplifier RSOA1(51) 1 port and described 3rd smooth Interleaver IL3(49) 2 ports be connected, described first reflective semiconductor optical amplifier RSOA1(51) 2 ports and the 4th optical circulator Cir4(55) the 2nd port be connected; 4th optical circulator Cir4(55) 1 port and a 3rd optical power divider SP3(56) be connected; 3rd optical power divider SP3(56) 1 port and a 4th smooth Interleaver IL4(48) be connected, the 4th smooth Interleaver IL4(48) output 1 port and a second reflective semiconductor optical amplifier RSOA2(50) 1 port be connected; This second reflective semiconductor optical amplifier RSOA2(50) 2 ports and described 3rd optical circulator Cir3(42) be connected; Described 4th smooth Interleaver IL4(48) output 2 port and a second descending ofdm signal receiver 2(58) be connected, this second descending ofdm signal receiver 2(58) with a 2nd OFDM Tx2(59) be connected, the 2nd OFDM Tx2(59) with a second optical signal switch 2(53) 2 ports be connected; Described 3rd optical power divider SP3(56) 2 ports and a second photoproduction millimeter-wave signal processor 2(57) be connected, this the second photoproduction millimeter-wave signal processor 2(57) with a second low pass filter LPF2(60) be connected, this second low pass filter LPF2(60) with described second optical signal switch 2(53) 1 port be connected; This second optical signal switch 2(53) with described second reflective semiconductor optical amplifier RSOA2(50) be connected;

Embodiment two:

See Fig. 1 ~ Fig. 4, this is based on the orthogonal frequency division multiplexing passive optical network system transmission method of polarization technology and photoproduction millimeter wave, the orthogonal frequency division multiplexing passive optical network system based on polarization technology and photoproduction millimeter wave according to claim 1 is adopted to operate, it is characterized in that: optical line terminal OLT(1) in N number of distributed feedback laser DFB(2), the wherein light of the first distribution type feedback laser and second component cloth feedback laser difference output wavelength difference 60GHz, by first circular array waveguide optical grating AWG1(3) send into first Mach and increase Dare modulation MZM1(5) carry out carrier wave suppression, first Mach increases Dare modulation MZM1(5) export the light of two groups of N number of wavelength, these two groups of light difference 60GHz.This two groups of N number of carrier spacings meet the integral multiple of free spectral range FSR, and the benefit done like this utilizes circulating duct grating AWG, the port that can pass through also can pass through, increase Dare by first Mach and modulate MZM1(5) two groups of carrier waves producing send into the first smooth Interleaver IL1(6), first Mach increases Dare modulation MZM1(5) driven by sinusoidal wave (20) device that occurs, through the first smooth Interleaver IL1(6) isolate two groups of carrier waves, first group of carrier wave is through second circular array waveguide optical grating AWG2(7), send into first group of N number of signal madulation module (8), send into the signal of first group of N number of signal madulation module (8) through a second optical veneer IL2(27) differ separately being exported of 60GHz, by the second optical veneer IL2(27) 1 port export light, send into a first optical power divider SP1(28), by the first optical power divider SP1(28) 1 port export light through a first optical polarization controller PC_X1(20), send into the first light intensity modulator IM1(31) 1 input port, second sine-wave generator RF2(34) sine wave that generates, send into the second optical power divider SP2(35), second optical power divider SP2(35) 1 port export signal, send into an OFDM upconvert baseband signals device (36), by the signal that an OFDM upconvert baseband signals device (36) exports, send into the first light intensity modulator IM1(31) 2 ports, first light intensity modulator IM1(31) light signal that generates, send into the first optical filter OF1(32), through the first optical filter OF1(32) signal that exports sends into the first light polarization beam combiner PBC1(33) 1 port, first optical power divider SP1(28) 2 ports export flashlight, through the second optical polarization controller PC_Y2(30), send into the second light intensity modulator IM2(37) 1 input port, second optical power divider SP2(35) 2 ports export signal, send into the second light intensity modulator IM2(37) 2 ports, through the second optical power divider SP2(35) signal modulated, send into the second optical filter OF2(38), through the second optical filter OF2(38) signal that exports sends into the first light polarization beam combiner PBC1(33) and 2 ports, through the first light polarization beam combiner PBC1(33) signal that exports, send into the first optical coupler OC1(39) 1 port, second optical veneer IL2(27) 2 ports export light, send into the first optical coupler OC1(39) 2 ports, through the first optical coupler OC1(39) signal that exports, send into the 3rd optical filter OF3(40), through the 3rd optical filter OF3(40) signal export, send into the 3rd circular array waveguide optical grating AWG3(10), second group through the 4th circular array waveguide optical grating AWG4(18), send into second group of N number of signal madulation module (19), the signal modulated by first group of N number of signal madulation module (8) is through the 3rd circular array waveguide optical grating AWG3(10), send into the first optical circulator Cir(11), by the first optical circulator Cir1(11) the 2nd port export, through the first erbium-doped optical fiber amplifier EDFA 1(12) inject the first optical fiber link (13) after optical signal amplification, first optical circulator Cir1(11) the upward signal that exports of the 1st port send into receiver 1(9), the signal modulated by second group of N number of signal madulation module (19) is through the 5th circular array waveguide optical grating AWG5(21), send into the second optical circulator Cir2(22), by the second optical circulator Cir2(22) the 2nd port export, through the second erbium-doped optical fiber amplifier EDFA 2(23) amplify after injection the second optical fiber link (24), second optical circulator Cir2(22) the upward signal that exports of the 1st port send into receiver 2(20), in first optical fiber link and the second optical fiber link, composite signal is through distant-end node RN(14) in the 6th circular array waveguide optical grating AWG6(15) and the 7th circular array waveguide optical grating AWG7(25) be sent to optical network unit group ONU group (17) respectively by first group of profile fiber (16) and second component cloth optical fiber (26) after demultiplexing, by the 6th circular array waveguide optical grating AWG6(15) send into the downstream signal of optical network unit group ONU group (17) through the 3rd optical circulator Cir3(42) 1 port send into the 3rd optical power divider SP3 (43), through the signal that 1 port of the 3rd optical power divider SP3 (43) exports, send into the first photoproduction millimeter-wave signal processor 1(44), through the first photoproduction millimeter-wave signal processor 1(44) signal that processes, send into the first low pass filter LPF1(47), through the first low pass filter LPF1(47) signal that processes, send into the first optical switch 1(52) 2 ports, through the signal that 2 ports of the 3rd optical power divider SP3 (43) export, through the 3rd smooth Interleaver IL3(49) 1 port export signal, send into the first descending ofdm signal receiver 1(45), through the first descending ofdm signal receiver 1(45) signal that exports sends into an OFDM Tx1(46), through an OFDM Tx1(46) signal, send into the first optical switch 1(52) 1 port, first optical switch 1(52) signal that exports, send into the first reflectivity semiconductor optical amplifier RSOA1(51), 3rd smooth Interleaver IL3(49) 2 ports export signal, send into the first reflectivity semiconductor optical amplifier RSOA1(51) 1 port, through the first reflectivity semiconductor optical amplifier RSOA1(51) 2 ports export signal, send into the 4th optical circulator Cir4(55) 2 ports, through the 4th optical circulator Cir4(55) 1 port export signal, send into the 4th optical power divider SP4 (56), through the signal that 1 port of the 3rd optical power divider SP3 (43) exports, send into the 4th smooth Interleaver IL4(48), entered the 4th smooth Interleaver IL4(48) 1 port export signal, send into the second reflectivity semiconductor optical amplifier RSOA2(50) 1 port, 4th smooth Interleaver IL4(48) 2 ports export signal, by the second descending ofdm signal receiver 2(58), send into the 2nd OFDM Tx2(59), through the 2nd OFDM Tx2(59) signal that exports, send into the second optical switch 2(53) 2 ports, through the signal that 2 ports of the 3rd optical power divider SP3 (43) export, send into the second photoproduction millimeter-wave signal processor 2(57), through the second photoproduction millimeter-wave signal processor 2(57) signal that processes, by the second low pass filter LPF2(60), send into the second optical switch 2(53) 1 port, through the second optical switch 2(53) signal that exports, send into the second reflectivity semiconductor optical amplifier RSOA2(50), second reflectivity semiconductor optical amplifier RSOA2(50) 2 ports export signal, send into the 3rd optical circulator Cir3(42) 2 ends.

Claims

1. the orthogonal frequency division multiplexing passive optical network system based on polarization technology and photoproduction millimeter wave, by an Optical Network Terminal OLT(1) through a first erbium-doped optical fiber amplifier EDFA 1(12) and a second erbium-doped optical fiber amplifier EDFA 2(23), by first optical fiber link (13) and second optical fiber link (24), connect an end node RN(14 far away), and distant-end node RN(14) be connected N group optical network unit group ONU group (17) respectively through first group of N road profile fiber (16) and second group of N road profile fiber (26), often organize optical network unit by two optical-fiber networks (41, 54) form, it is characterized in that:

1) the Optical Network Terminal OLT(1 described in): have distributed feedback laser group DFB(2) be connected to first circular array waveguide optical grating AWG1(3); First circular array waveguide optical grating AWG1(3) increase Dare modulate MZM1(5 with first Mach) be connected; This first Mach increases Dare modulation MZM1(5) signal drives port and a primary sinusoid generator RF1(4) be connected, first Mach increases Dare and modulates MZM1(5) signal output port and a first smooth Interleaver IL1(6) be connected; This first smooth Interleaver IL1(6) the 1st signal output port and one second circular array waveguide optical grating AWG2(7) be connected, this is second years old circular array waveguide optical grating AWG2(7) signal output port be connected with one group of N number of signal madulation module (8), the signal output port of the N number of signal madulation module (8) of this group and one the 3rd circular array waveguide optical grating AWG3(10) be connected, the 3rd circular array waveguide optical grating AWG3(10) signal output part and a first optical circulator Cir1(11) be connected, this first optical circulator Cir1(11) the 1st port and a receiver 1(9) be connected; Described first optical circulator Cir1(11) the 2nd port and described first erbium-doped optical fiber amplifier EDFA 1(11) input port is connected; Described first smooth Interleaver IL1(6) the 2nd signal output port and one the 4th circular array waveguide optical grating AWG4(18) be connected, the 4th circular array waveguide optical grating AWG4(18) signal output port be connected with second group of N number of signal madulation module (19), the signal output port of this second group N number of signal madulation module (19) and one the 5th circular array waveguide optical grating AWG5(21) be connected, the 5th circular array waveguide optical grating AWG5(21) signal output part and a second optical circulator Cir2(22) be connected, this second optical circulator Cir2(22) the 1st signal output port and a receiver 2(20) be connected; Described second optical circulator Cir2(22) the 2nd port and described second erbium-doped optical fiber amplifier EDFA 2(23) input port is connected;

2) described distant-end node RN(14) comprise one the 6th circular array waveguide optical grating AWG6(15) and one the 7th circular array waveguide optical grating AWG7(25), these two circular array waveguide optical grating AWG(15,25) be connected described optical network unit group ONU group (17) by first group of N road profile fiber (16) respectively with second group of N road profile fiber (26);

3) described signal madulation module (8, 19): have a second smooth Interleaver IL2(27), this second smooth Interleaver IL2(27) 1 port and a first optical power divider SP1(28) be connected, this first optical power divider SP1(28) output 1 port and a first Polarization Controller PC_X1(29) be connected, this first Polarization Controller PC_X1(29) with a first intensity modulator IM1(31) input 1 port be connected, this first intensity modulator IM1(31) output port and a first optical filter OF1(32) be connected, this first optical filter OF1(32) output port and a first polarization beam combiner PBC1(33) input 1 port be connected, described first optical power divider SP1(28) output 2 port and a first Polarization Controller PC_Y2(30) be connected, this first Polarization Controller PC_Y2(30) with a second intensity modulator IM2(37) input 1 port be connected, this second intensity modulator IM2(37) output port and a second optical filter OF2(38) be connected, this second optical filter OF2(38) output port and a first polarization beam combiner PBC1(33) input 2 port be connected, have a second sine-wave generator RF2(34) with a second optical power divider SP2(35) be connected, this second optical power divider SP2(35) 1 output port be connected with an OFDM upconvert baseband signals device (36), the output port of an OFDM upconvert baseband signals device (36) and the first intensity modulator IM1(31) input 2 port be connected, described second optical power divider SP2(35) 2 output ports and the second intensity modulator IM2(37) 2 input 2 ports be connected, described first polarization beam combiner PBC1(33) output port and a first optical coupler OC1(39) input 1 port be connected, described second smooth Interleaver IL2(27) 2 ports and the first optical coupler OC1(39) input 2 port be connected, this first optical coupler OC1(39) output port and a 3rd optical filter OF3(40) be connected,

4) described optical network unit group ONU group (17) is by the first optical network unit ONU 1(41) with the second optical network unit ONU 2(54) two optical network units form: the 1st port a 3rd optical circulator OC3(42) and a second optical power divider SP2(43) be connected; Described second optical power divider SP2(43) the 1st port and a first photoproduction millimeter wave new processor 1(44) be connected; This first light remains millimeter wave processor 1(44) with a first low pass filter LPF1(47) be connected, this first low pass filter LPF1(47) be connected with 2 ports of a first smooth selector switch (52); Described second optical power divider SP2(43) the 2nd port and a 3rd smooth Interleaver IL3(49) be connected, 3rd smooth Interleaver IL3(49) output 1 port and a first descending OFDM new receiver 1(45) be connected, this first descending OFDM new receiver 1(45) with an OFDM Tx1(46) be connected, an OFDM Tx1(46) be connected with 1 port of described first smooth selector switch (52); This first smooth selector switch (52) and a first reflective semiconductor optical amplifier RSOA1(51) be connected; This first reflective semiconductor optical amplifier RSOA1(51) 1 port and described 3rd smooth Interleaver IL3(49) 2 ports be connected, described first reflective semiconductor optical amplifier RSOA1(51) 2 ports and the 4th optical circulator Cir4(55) the 2nd port be connected; 4th optical circulator Cir4(55) 1 port and a 3rd optical power divider SP3(56) be connected; 3rd optical power divider SP3(56) 1 port and a 4th smooth Interleaver IL4(48) be connected, the 4th smooth Interleaver IL4(48) output 1 port and a second reflective semiconductor optical amplifier RSOA2(50) 1 port be connected; This second reflective semiconductor optical amplifier RSOA2(50) 2 ports and described 3rd optical circulator Cir3(42) be connected; Described 4th smooth Interleaver IL4(48) output 2 port and a second descending ofdm signal receiver 2(58) be connected, this second descending ofdm signal receiver 2(58) with a 2nd OFDM Tx2(59) be connected, the 2nd OFDM Tx2(59) with a second optical signal switch 2(53) 2 ports be connected; Described 3rd optical power divider SP3(56) 2 ports and a second photoproduction millimeter-wave signal processor 2(57) be connected, this the second photoproduction millimeter-wave signal processor 2(57) with a second low pass filter LPF2(60) be connected, this second low pass filter LPF2(60) with described second optical signal switch 2(53) 1 port be connected; This second optical signal switch 2(53) with described second reflective semiconductor optical amplifier RSOA2(50) be connected;

A kind of orthogonal frequency division multiplexing passive optical network system transmission method based on polarization technology and photoproduction millimeter wave, the orthogonal frequency division multiplexing passive optical network system based on polarization technology and photoproduction millimeter wave according to claim 1 is adopted to operate, it is characterized in that: optical line terminal OLT(1) in N number of distributed feedback laser DFB(2), the wherein light of the first distribution type feedback laser and second component cloth feedback laser difference output wavelength difference 60GHz, by first circular array waveguide optical grating AWG1(3) send into first Mach and increase Dare modulation MZM1(5) carry out carrier wave suppression, first Mach increases Dare modulation MZM1(5) export the light of two groups of N number of wavelength, these two groups of light difference 60GHz.

2. this two groups of N number of carrier spacings meet the integral multiple of free spectral range FSR, and the benefit done like this utilizes circulating duct grating AWG, the port that can pass through also can pass through, increase Dare by first Mach and modulate MZM1(5) two groups of carrier waves producing send into the first smooth Interleaver IL1(6), first Mach increases Dare modulation MZM1(5) driven by sinusoidal wave (20) device that occurs, through the first smooth Interleaver IL1(6) isolate two groups of carrier waves, first group of carrier wave is through second circular array waveguide optical grating AWG2(7), send into first group of N number of signal madulation module (8), send into the signal of first group of N number of signal madulation module (8) through a second optical veneer IL2(27) differ separately being exported of 60GHz, by the second optical veneer IL2(27) 1 port export light, send into a first optical power divider SP1(28), by the first optical power divider SP1(28) 1 port export light through a first optical polarization controller PC_X1(20), send into the first light intensity modulator IM1(31) 1 input port, second sine-wave generator RF2(34) sine wave that generates, send into the second optical power divider SP2(35), second optical power divider SP2(35) 1 port export signal, send into an OFDM upconvert baseband signals device (36), by the signal that an OFDM upconvert baseband signals device (36) exports, send into the first light intensity modulator IM1(31) 2 ports, first light intensity modulator IM1(31) light signal that generates, send into the first optical filter OF1(32), through the first optical filter OF1(32) signal that exports sends into the first light polarization beam combiner PBC1(33) 1 port, first optical power divider SP1(28) 2 ports export flashlight, through the second optical polarization controller PC_Y2(30), send into the second light intensity modulator IM2(37) 1 input port, second optical power divider SP2(35) 2 ports export signal, send into the second light intensity modulator IM2(37) 2 ports, through the second optical power divider SP2(35) signal modulated, send into the second optical filter OF2(38), through the second optical filter OF2(38) signal that exports sends into the first light polarization beam combiner PBC1(33) and 2 ports, through the first light polarization beam combiner PBC1(33) signal that exports, send into the first optical coupler OC1(39) 1 port, second optical veneer IL2(27) 2 ports export light, send into the first optical coupler OC1(39) 2 ports, through the first optical coupler OC1(39) signal that exports, send into the 3rd optical filter OF3(40), through the 3rd optical filter OF3(40) signal export, send into the 3rd circular array waveguide optical grating AWG3(10), second group through the 4th circular array waveguide optical grating AWG4(18), send into second group of N number of signal madulation module (19), the signal modulated by first group of N number of signal madulation module (8) is through the 3rd circular array waveguide optical grating AWG3(10), send into the first optical circulator Cir(11), by the first optical circulator Cir1(11) the 2nd port export, through the first erbium-doped optical fiber amplifier EDFA 1(12) inject the first optical fiber link (13) after optical signal amplification, first optical circulator Cir1(11) the upward signal that exports of the 1st port send into receiver 1(9), the signal modulated by second group of N number of signal madulation module (19) is through the 5th circular array waveguide optical grating AWG5(21), send into the second optical circulator Cir2(22), by the second optical circulator Cir2(22) the 2nd port export, through the second erbium-doped optical fiber amplifier EDFA 2(23) amplify after injection the second optical fiber link (24), second optical circulator Cir2(22) the upward signal that exports of the 1st port send into receiver 2(20), in first optical fiber link and the second optical fiber link, composite signal is through distant-end node RN(14) in the 6th circular array waveguide optical grating AWG6(15) and the 7th circular array waveguide optical grating AWG7(25) be sent to optical network unit group ONU group (17) respectively by first group of profile fiber (16) and second component cloth optical fiber (26) after demultiplexing, by the 6th circular array waveguide optical grating AWG6(15) send into the downstream signal of optical network unit group ONU group (17) through the 3rd optical circulator Cir3(42) 1 port send into the 3rd optical power divider SP3 (43), through the signal that 1 port of the 3rd optical power divider SP3 (43) exports, send into the first photoproduction millimeter-wave signal processor 1(44), through the first photoproduction millimeter-wave signal processor 1(44) signal that processes, send into the first low pass filter LPF1(47), through the first low pass filter LPF1(47) signal that processes, send into the first optical switch 1(52) 2 ports, through the signal that 2 ports of the 3rd optical power divider SP3 (43) export, through the 3rd smooth Interleaver IL3(49) 1 port export signal, send into the first descending ofdm signal receiver 1(45), through the first descending ofdm signal receiver 1(45) signal that exports sends into an OFDM Tx1(46), through an OFDM Tx1(46) signal, send into the first optical switch 1(52) 1 port, first optical switch 1(52) signal that exports, send into the first reflectivity semiconductor optical amplifier RSOA1(51), 3rd smooth Interleaver IL3(49) 2 ports export signal, send into the first reflectivity semiconductor optical amplifier RSOA1(51) 1 port, through the first reflectivity semiconductor optical amplifier RSOA1(51) 2 ports export signal, send into the 4th optical circulator Cir4(55) 2 ports, through the 4th optical circulator Cir4(55) 1 port export signal, send into the 4th optical power divider SP4 (56), through the signal that 1 port of the 3rd optical power divider SP3 (43) exports, send into the 4th smooth Interleaver IL4(48), entered the 4th smooth Interleaver IL4(48) 1 port export signal, send into the second reflectivity semiconductor optical amplifier RSOA2(50) 1 port, 4th smooth Interleaver IL4(48) 2 ports export signal, by the second descending ofdm signal receiver 2(58), send into the 2nd OFDM Tx2(59), through the 2nd OFDM Tx2(59) signal that exports, send into the second optical switch 2(53) 2 ports, through the signal that 2 ports of the 3rd optical power divider SP3 (43) export, send into the second photoproduction millimeter-wave signal processor 2(57), through the second photoproduction millimeter-wave signal processor 2(57) signal that processes, by the second low pass filter LPF2(60), send into the second optical switch 2(53) 1 port, through the second optical switch 2(53) signal that exports, send into the second reflectivity semiconductor optical amplifier RSOA2(50), second reflectivity semiconductor optical amplifier RSOA2(50) 2 ports export signal, send into the 3rd optical circulator Cir3(42) 2 ports.