CN103634711A - Orthogonal frequency division multiplexing passive optical network system based on optical carrier suppression and sub carrier separation technology and transmission method of system - Google Patents
Orthogonal frequency division multiplexing passive optical network system based on optical carrier suppression and sub carrier separation technology and transmission method of system Download PDFInfo
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- CN103634711A CN103634711A CN201310514774.1A CN201310514774A CN103634711A CN 103634711 A CN103634711 A CN 103634711A CN 201310514774 A CN201310514774 A CN 201310514774A CN 103634711 A CN103634711 A CN 103634711A
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Abstract
The invention relates to an orthogonal frequency division multiplexing passive optical network system based on optical carrier suppression and sub carrier separation technology and a transmission method of the system. The orthogonal frequency division multiplexing passive optical network system adopts an optical line terminal, and is connected with a far end node by two paths of optical fiber links through an erbium-doped optical fiber amplifier, the far end node is connected with optical network unit groups through distribution optical fiber, each optical network unit group consists of two optical network units, the optical line terminal consists of a distributive feedback laser, an optical crossing wavelength division multiplexer, an adjustable optical wave filter, a cyclic array wave guide grating, a cyclic array wave guide grating, a Mach-Zehnder modulator, a sine-wave generator, an optical circulator, an intensity modulator and a receiving machine. The orthogonal frequency division multiplexing passive optical network system has the advantages that the design of the Mach-Zehnder modulator, the optical crossing wavelength division multiplexer and the optical network unit groups is adopted, the optical carrier suppression, the sub carrier separation and colorless ONU (optical network unit) are realized, the system cost is reduced, and the system maintenance is convenient.
Description
Technical field
The present invention relates to optical communication field, specifically relate to a kind of orthogonal frequency division multiplexing passive optical network system and transmission method thereof based on optical carrier suppression separated with subcarrier (OCSS) technology, realize non-colored light network element (ONU) orthogonal frequency division multiplexing passive optical network (OFDM-PON) systemic-function.
Background technology
Access Network is as the bridge of user side and metropolitan area network/backbone network, and development is rapid, particularly optical access network.In recent years, the concept of a series of optical access networks 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, can realize varigrained scheduling of resource, service quality (QOS) and the bandwidth demand that can meet different business, cause numerous researchers and communication equipment business's concern.And colorless ONU technology is also one of key technology of PON.The present invention applies to existing optical carrier suppression separated with subcarrier (OCSS) technology in OFDM-PON, system architecture has been carried out to rational layout, this system has not only improved the utilance of fiber bandwidth, increased the stability of system, and can provide multiple business to user neatly, each ONU in system only needs a photon carrier wave, without distributing independent light source, realize colorless ONU, reduced system O&M cost.
Summary of the invention
The object of the invention is to the deficiency existing for the OFDM-PON system schema of realizing colorless ONU, a kind of orthogonal frequency division multiplexing passive optical network system and transmission method thereof based on optical carrier suppression separated with subcarrier (OCSS) technology proposed, reduce and realize the requirement of the ofdm system of colorless ONU to various device performances, and the many-sided impacts such as Dispersion and non-linearity effects that reduce optical fiber.
For achieving the above object, design of the present invention is: at optical line terminal OLT, adopt N the distributed feedback laser DFB transmitting wavelength in C-band and L-band respectively, and by the suppressed subcarrier that produces of both arms MZM modulator light carrier, finally produce 2N subcarrier.Reasonable arrangement light Interleaver IL, tunable optical filter TOF, circular array waveguide optical grating AWG, intensity modulator IM, 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:
Orthogonal frequency division multiplexing passive optical network system based on optical carrier suppression and the realization of subcarrier isolation technics, by Optical Network Terminal OLT process, through the first erbium-doped optical fiber amplifier EDFA 1 and the second erbium-doped optical fiber amplifier EDFA 2, pass through the first optical fiber link and the second optical fiber link remote node of the connection RN, and distant-end node RN is connected respectively N group optical network unit group ONU group through first group of N road profile fiber and second group of N road profile fiber, every group of optical network unit is comprised of two optical-fiber networks.It is characterized in that: 1) described Optical Network Terminal OLT: the first distribution type feedback laser and second component cloth formula feedback laser are connected to first
circular array waveguide optical grating AWG1; First
circular array waveguide optical grating AWG1 is connected with first Mach of increasing Dare modulation MZM1; First Mach of increasing Dare modulation MZM1 signal driver port is connected with a sine-wave generator, and first Mach increases Dare modulation MZM1 signal output port and be connected with the first optical interferometer filter IL1; The 1st signal output port of the first smooth Interleaver IL1 is connected with the first optic tunable filter TOF1, the output port of the first tunable optical filter TOF1 and second
circular array waveguide optical grating AWG2 is connected, and second
the signal output port of circular array waveguide optical grating AWG2 is connected with first group of N intensity modulator IM, the signal output port and the 3rd of N intensity modulator IM of this group
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 the first optical circulator OC1, the 1st port and the 4th of the first optical circulator OC1
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 N group upward signal receiver RX; The 2nd port of the first optical circulator OC1 is connected with the first erbium-doped optical fiber amplifier EDFA 1 input port; The 2nd signal output port of the first smooth Interleaver IL1 is connected with the second optic tunable filter TOF2, the output port of tunable optical filter TOF2 and the 5th
circular array waveguide optical grating AWG5 is connected, and the 5th
the signal output port of circular array waveguide optical grating AWG5 is connected with second group of N intensity modulator IM, the signal output port and the 6th of N intensity modulator IM of this group
circular array waveguide optical grating AWG6 is connected, and the 6th
the signal output part of circular array waveguide optical grating AWG6 is connected with the second optical circulator OC2, the 1st signal output port and the 7th of the second optical circulator OC2
circular array waveguide optical grating AWG7 is connected, and the 7th
the signal output port of circular array waveguide optical grating AWG7 is connected with N group upward signal receiver RX; The 2nd port of the second optical circulator OC2 is connected with the second erbium-doped optical fiber amplifier EDFA 2 input ports; 2) distant-end node RN comprises the 8th
circular array waveguide optical grating AWG8 and the 9th
circular array waveguide optical grating AWG9, these two circular array waveguide optical grating AWG are by first group of N road profile fiber and profile fiber difference connecting optical network unit, second group of N road group ONU group; 3) optical network unit group ONU group is comprised of two optical network units of the first optical network unit ONU and the second optical network unit ONU: the 1st port of a 3rd optical circulator OC3 is connected with the first optical power divider Splitter1; The 1st port of the first optical power divider Splitter1 is connected with the first downstream signal receiver RX_1; The 2nd port of the first optical power divider Splitter1 is connected with the 1st port of the second reflective semiconductor optical amplifier RSOA2; The 2nd port of the second reflective semiconductor optical amplifier RSOA2 is connected with the 2nd port of the 4th optical circulator OC4; The 1st port of the 4th optical circulator OC4 is connected with the second optical power divider Splitter2; The 1st port of the second optical power divider Splitter2 is connected with the first downstream signal receiver RX_N+1; The 2nd port of the second optical power divider Splitter2 is connected with the 2nd port of the first reflective semiconductor optical amplifier RSOA1; The 1st port of the first reflective semiconductor optical amplifier RSOA1 is connected with the 2nd port of the 3rd optical circulator OC3.
A kind of orthogonal frequency division multiplexing passive optical network (OFDM-PON) system transmission method based on optical carrier suppression and subcarrier isolation technics (OCSS), adopt said system to transmit, it is characterized in that: in described optical line terminal OLT, N distributed feedback laser DFB difference output wavelength is at the light of C-band and the light of L-band, by first
circular array waveguide optical grating AWG1 sends into first Mach and increases Dare modulation MZM1 and carry out carrier wave inhibition, first Mach increase Dare modulation MZM1 export one group of N wavelength at the light of C-band and one group of N wavelength the light at L-band.This two groups N carrier spacing meets the integral multiple of free spectral range FSR, and the benefit of doing is like this to utilize circulating duct grating AWG; By first Mach, increase two groups of carrier waves that Dare modulation MZM1 produces, send into the first smooth Interleaver IL1, first Mach increases Dare modulation MZM1 and is driven by a sine-wave generator, through the first optical interferometer filter IL1, isolate two groups of carrier waves, first group of carrier wave, through the first tunable optical filter TOF1, leaches light wave and sends into second
circular array waveguide optical grating AWG2, enters first group of N intensity modulator IM, and second group of carrier wave, through the second tunable optical filter TOF2, leaches light wave and send into the 5th
circular array waveguide optical grating AWG5, enters second group of N intensity modulator IM; The signal being modulated by first group of N intensity modulator IM is through the 3rd
circular array waveguide optical grating AWG3, sends into the first optical circulator OC1, by the 2nd port of the first optical circulator OC1, exports, and after the first erbium-doped optical fiber amplifier EDFA 1 optical signal amplification, injects the first optical fiber link; The upward signal of the 1st port output of the first optical circulator OC1 is through the 4th
circular array waveguide optical grating AWG4 demultiplexing, sends into first group N upward signal receiver RX; The signal being modulated by second group of N intensity modulator IM is through the 6th
circular array waveguide optical grating AWG6, sends into the second optical circulator OC2, by the 2nd signal output port of the second optical circulator OC2, exports, and after the second erbium-doped optical fiber amplifier EDFA 2 optical signal amplifications, injects the second optical fiber link; The upward signal of the 1st signal output port output of the second optical circulator OC2 is through the 7th
circular array waveguide optical grating AWG7 demultiplexing, sends into second group N upward signal receiver RX; In the first optical fiber link and the second optical fiber link, composite signal is in distant-end node RN the 8th
circular array waveguide optical grating AWG8 and the 9th
after circular array waveguide optical grating AWG9 demultiplexing, by first group of profile fiber and second component cloth optical fiber, be sent to optical network unit group ONU group; By the 8th
the downstream signal that circular array waveguide optical grating AWG8 sends into optical network unit group ONU group is sent into the first optical power divider through the 1st port of the 3rd optical circulator OC3 and is divided into two-way: a road is as the demodulation of the first downstream signal receiver RX_1 in the first optical network unit ONU _ 1, and up-link carrier is modulated again as the second reflective semiconductor optical amplifier RSOA2's in the second optical network unit ONU _ N+1 in another road; By the 9th
the downstream signal that circular array waveguide optical grating AWG9 sends into optical network unit group ONU group is sent into the first optical power divider through the 1st port of the 4th optical circulator OC4 and is divided into two-way: a road is as the demodulation of the first downstream signal receiver RX_N+1 in the first optical network unit ONU _ N+1, and up-link carrier is modulated again as the first reflective semiconductor optical amplifier RSOA1's in the second optical network unit ONU _ 1 in another road.
The present invention compared with prior art, has following remarkable advantage: 1) native system utilizes OFDM modulation technique greatly to increase the capacity of system; 2) native system has proposed utilization optical carrier suppression and subcarrier isolation technics OCSS realizes the decolorizable system of optical network unit ONU, reduces system operation cost.
Accompanying drawing explanation
Fig. 1 is the orthogonal frequency division multiplexing passive optical network system configuration schematic diagram based on optical carrier suppression and subcarrier isolation technics of the present invention.
Fig. 2 is system optical network unit group structural representation in Fig. 1.
Embodiment
Accompanying drawings, preferred exemplifying embodiment of the present invention is as follows:
Embodiment mono-:
Referring to Fig. 1 ~ Fig. 2, this orthogonal frequency division multiplexing passive optical network system based on optical carrier suppression and subcarrier isolation technics, by Optical Network Terminal OLT(4) through the first erbium-doped optical fiber amplifier EDFA 1(14) and the second erbium-doped optical fiber amplifier EDFA 2(28) by the first optical fiber link (15) and the second optical fiber link (29) remote node of the connection RN(16), and distant-end node RN(16) through first group of N road profile fiber (18) and second group of N road profile fiber (31), be connected respectively N group optical network unit group ONU group (19), every group of optical network unit is comprised of two optical-fiber networks.Optical Network Terminal OLT(4): the first distribution type feedback laser (1) and second component cloth formula feedback laser (2) are connected to first
circular array waveguide optical grating AWG1(3); First
circular array waveguide optical grating AWG1(3) increase Dare modulation MZM1(5 with first Mach) be connected; First Mach of increasing Dare modulation MZM1(5) signal driver port is connected with a sine-wave generator (20), and first Mach increases Dare modulation MZM1(5) signal output port and the first smooth Interleaver IL1(6) be connected; The first smooth Interleaver IL1(6) the 1st signal output port and the first tunable optical filter TOF1(7) input port be connected, the output port and second of adjustable optical filtering ripple device TOF1
circular array waveguide optical grating AWG2(8) be connected, second
circular array waveguide optical grating AWG2(8) signal output port and first group of N intensity modulator IM(9) be connected, this organizes N intensity modulator IM(9) signal output port and the 3rd
circular array waveguide optical grating AWG3(10) be connected, the 3rd
circular array waveguide optical grating AWG3(10) signal output part and the first optical circulator OC1(13) be connected, the first optical circulator OC1(13) the 1st port and the 4th
circular array waveguide optical grating AWG4(12) be connected, the 4th
circular array waveguide optical grating AWG4(12) signal output port and N group upward signal receiver RX(11) be connected; The first optical circulator OC1(13) the 2nd port and the first erbium-doped optical fiber amplifier EDFA 1(14) input port is connected; The first smooth Interleaver IL1(6) the 2nd signal output port and the second tunable optical filter TOF2(21) input port be connected, the second tunable optical filter TOF2(21) output port and the 5th
circular array waveguide optical grating AWG5(22) be connected, the 5th
circular array waveguide optical grating AWG5(22) signal output port and second group of N intensity modulator IM(23) be connected, this organizes N intensity modulator IM(23) signal output port and the 6th
circular array waveguide optical grating AWG6(24) be connected, the 6th
circular array waveguide optical grating AWG6(24) signal output part and the second optical circulator OC2(27) be connected, the second optical circulator OC2(27) the 1st signal output port and the 7th
circular array waveguide optical grating AWG7(26) be connected, the 7th
circular array waveguide optical grating AWG7(26) signal output port and N group upward signal receiver RX(25) be connected; The 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) comprise the 8th
circular array waveguide optical grating AWG8(17) and the 9th
circular array waveguide optical grating AWG9(30), these two circular array waveguide optical grating AWG are by first group of N road profile fiber (18) and second group of N road profile fiber (31) difference connecting optical network unit group ONU group (19); Optical network unit group ONU group (19) is comprised of (41) two optical network units of the first optical network unit ONU (36) and the second optical network unit ONU: the 1st port a 3rd optical circulator OC3(32) and the first optical power divider Splitter1(33) be connected; The first optical power divider Splitter1(33) the 1st port and the first downstream signal receiver RX_1(34) be connected; The first optical power divider Splitter1(34) the 2nd port and the second reflective semiconductor optical amplifier RSOA2(40) the 1st port be connected; The second reflective semiconductor optical amplifier RSOA2(40) the 2nd port and the 4th optical circulator OC4(37) the 2nd port be connected; The 4th optical circulator OC4(37) the 1st port and the second optical power divider Splitter2(38) be connected; The second optical power divider Splitter2(38) the 1st port and the first downstream signal receiver RX_N+1(39) be connected; The second optical power divider Splitter2(39) the 2nd port and the first reflective semiconductor optical amplifier RSOA1(35) the 2nd port be connected; The first reflective semiconductor optical amplifier RSOA1(35) the 1st port and the 3rd optical circulator OC3(32) the 2nd port be connected.
Embodiment bis-:
Referring to Fig. 1～Fig. 2, this orthogonal frequency division multiplexing passive optical network system transmission method based on optical carrier suppression and subcarrier isolation technics, adopt said system to operate, it is characterized in that: N distributed feedback laser DFB described optical line terminal OLT(4), wherein the first distribution type feedback laser (1) and second component cloth formula feedback laser (2) difference output wavelength are at the light of C-band and the light of L-band, by first
circular array waveguide optical grating AWG1(3) send into first Mach and increase Dare modulation MZM1(5) carry out carrier wave inhibition, first Mach increases Dare modulation MZM1(5) export one group of N wavelength at the light of C-band and one group of N wavelength the light at L-band.This two groups N carrier spacing meets the integral multiple of free spectral range FSR, and the benefit of doing is like this to utilize circulating duct grating AWG,
the port that can pass through
also can pass through; By first Mach, increase Dare modulation MZM1(5) two groups of carrier waves producing send into the first smooth Interleaver IL1(6), first Mach increases Dare modulation MZM1(5) by sinusoidal wave (20) device that occurs, driven, through the first smooth Interleaver IL1(6) isolate two groups of carrier waves, first group of carrier wave is through the first tunable optical filter TOF1(7) leach light wave, send into second
circular array waveguide optical grating AWG2(8), send into first group of N intensity modulator IM(9), second group of carrier wave is through the second tunable optical filter TOF2(21) leach light wave, send into the 5th
circular array waveguide optical grating AWG5(22), send into second group of N intensity modulator IM(23); By first group of N intensity modulator IM(9) signal that modulates is through the 3rd
circular array waveguide optical grating AWG3(10), send into the first optical circulator OC1(13), by the first optical circulator OC1(13) the 2nd port output, through the first erbium-doped optical fiber amplifier EDFA 1(14) inject the first optical fiber link (15) after optical signal amplification; The upward signal of the 1st port output the first optical circulator OC1(13) is through the 4th
circular array waveguide optical grating AWG4(12) demultiplexing, sends into first group N upward signal receiver RX(11); By second group of N intensity modulator IM(23) signal that modulates is through the 6th
circular array waveguide optical grating AWG6(24), send into the second optical circulator OC2(27), by the second optical circulator OC2(27) the 2nd port output, through the second erbium-doped optical fiber amplifier EDFA 2(28) amplify after injection the second optical fiber link (29); The upward signal of the 1st port output the second optical circulator OC2(27) is through the 7th
circular array waveguide optical grating AWG7(26) demultiplexing, sends into second group N upward signal receiver RX(25); In the first optical fiber link and the second optical fiber link, composite signal is through distant-end node RN(16) in the 8th
circular array waveguide optical grating AWG8(17) and the 9th
circular array waveguide optical grating AWG9(30) after demultiplexing, by first group of profile fiber (18) and second component cloth optical fiber (31), be sent to optical network unit group ONU group (19) respectively; By the 8th
circular array waveguide optical grating AWG8(17) downstream signal of sending into optical network unit group ONU group (19) is through the 3rd optical circulator OC3(32) the 1st port send into the first optical power divider and be divided into two-way: a road is as the first optical network unit ONU _ 1(36) in the first downstream signal receiver RX_1(34) input, another road is as the second optical network unit ONU _ N+1(41) in the second reflective semiconductor optical amplifier RSOA2(40) modulate again up-link carrier; By the 9th
circular array waveguide optical grating AWG9(30) downstream signal of sending into optical network unit group ONU group (19) is through the 4th optical circulator OC4(37) the 1st port send into the first optical power divider and be divided into two-way: a road is as the first optical network unit ONU _ N+1(41) in the first downstream signal receiver RX_N+1(39) input, another road is as the first optical network unit ONU _ 1(36) in the first reflective semiconductor optical amplifier RSOA1(35) modulate again up-link carrier; The transmission means of upward signal is the inverse process of downstream signal transmission.
Claims (2)
1. the orthogonal frequency division multiplexing passive optical network system based on optical carrier suppression and subcarrier isolation technics, by an Optical Network Terminal OLT(4) through a first erbium-doped optical fiber amplifier EDFA 1(14) with a second erbium-doped optical fiber amplifier EDFA 2(28) by first optical fiber link (15), be connected an end node RN(16 far away with second optical fiber link (29)), and distant-end node RN(16) through first group of N road profile fiber (18) and second group of N road profile fiber (31), be connected respectively N group optical network unit group ONU group (19), every group of optical network unit is by two optical-fiber networks (36, 41) form.It is characterized in that:
1) described Optical Network Terminal OLT(4): have the first distribution type feedback laser (1) and second component cloth formula feedback laser (2) to be connected to first
circular array waveguide optical grating AWG1(3); First
circular array waveguide optical grating AWG1(3) increase Dare modulation MZM1(5 with first Mach) be connected; This first Mach increasing Dare modulation MZM1(5) signal driver port is connected with a sine-wave generator (20), and first Mach increases Dare modulation 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 a first tunable optical filter TOF1(7) input port be connected, this tunable optical filter TOF1(7) output port and one second
circular array waveguide optical grating AWG2(8) be connected, this is second years old
circular array waveguide optical grating AWG2(8) signal output port and first group of N intensity modulator IM(9) be connected, this organizes N intensity modulator IM(9) signal output port 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 OC1(13) be connected, this first optical circulator OC1(13) the 1st port and one the 4th
circular array waveguide optical grating AWG4(12) be connected, the 4th
circular array waveguide optical grating AWG4(12) signal output port and N group upward signal receiver RX(11) be connected; Described the first optical circulator OC1(13) the 2nd port and described the first erbium-doped optical fiber amplifier EDFA 1(14) input port is connected; Described the first smooth Interleaver IL1(6) the 2nd signal output port and the second tunable optical filter TOF2(21) input port be connected, this second tunable optical filter TOF2(21) output port and one the 5th
circular array waveguide optical grating AWG5(22) be connected, the 5th
circular array waveguide optical grating AWG5(22) signal output port and second group of N intensity modulator IM(23) be connected, this second group of N intensity modulator IM(23) signal output port and one the 6th
circular array waveguide optical grating AWG6(24) be connected, the 6th
circular array waveguide optical grating AWG6(24) signal output part and a second optical circulator OC2(27) be connected, this second optical circulator OC2(27) the 1st signal output port and the 7th
circular array waveguide optical grating AWG7(26) be connected, the 7th
circular array waveguide optical grating AWG7(26) signal output port and N group upward signal receiver RX(25) be connected; Described the second optical circulator OC2(27) the 2nd port and described the second erbium-doped optical fiber amplifier EDFA 2(28) input port is connected;
2) described distant-end node RN(16) comprise one the 8th
circular array waveguide optical grating AWG8(17) and one the 9th
circular array waveguide optical grating AWG9(30), these two circular array waveguide optical grating AWG(17,30) by first group of N road profile fiber (18), be connected respectively described optical network unit group ONU group (19) with second group of N road profile fiber (31);
3) described optical network unit group ONU group (19) is comprised of (41) two optical network units of the first optical network unit ONU (36) and the second optical network unit ONU: the 1st port a 3rd optical circulator OC3(32) and a first optical power divider Splitter1(33) be connected; Described the first optical power divider Splitter1(33) the 1st port and a first downstream signal receiver RX_1(34) be connected; Described the first optical power divider Splitter1(33) the 2nd port and a second reflective semiconductor optical amplifier RSOA2(40) the 1st port be connected; Described the second reflective semiconductor optical amplifier RSOA2(40) the 2nd port and the 4th optical circulator OC4(37) the 2nd port be connected; The 4th optical circulator OC4(37) the 1st port and a second optical power divider Splitter2(38) be connected; The second optical power divider Splitter2(38) the 1st port and a first downstream signal receiver RX_N+1(39) be connected; The second optical power divider Splitter2(38) the 2nd port and a first reflective semiconductor optical amplifier RSOA1(35) the 1st port be connected; The first reflective semiconductor optical amplifier RSOA1(35) the 2nd port and described the 3rd optical circulator OC3(32) the 2nd port be connected.
2. the orthogonal frequency division multiplexing passive optical network transmission method based on optical carrier suppression and subcarrier isolation technics, adopt the orthogonal frequency division multiplexing passive optical network system based on optical carrier suppression and subcarrier isolation technics according to claim 1 to operate, it is characterized in that: N distributed feedback laser DFB optical line terminal OLT(4), wherein the first distribution type feedback laser (1) and second component cloth formula feedback laser (2) difference output wavelength are at the light of C-band and the light of L-band, by first
circular array waveguide optical grating AWG1(3) send into first Mach and increase Dare modulation MZM1(5) carry out carrier wave inhibition, first Mach increases Dare modulation MZM1(5) export one group of N wavelength at the light of C-band and one group of N wavelength the light at L-band.This two groups N carrier spacing meets the integral multiple of free spectral range FSR, and the benefit of doing is like this to utilize circulating duct grating AWG,
the port that can pass through
also can pass through; By first Mach, increase Dare modulation MZM1(5) two groups of carrier waves producing send into the first smooth Interleaver IL1(6), first Mach increases Dare modulation MZM1(5) by sinusoidal wave (20) device that occurs, driven, through the first smooth Interleaver IL1(6) isolate two groups of carrier waves, first group of carrier wave is through the first optic tunable filter TOF1(7) leach light wave, send into second
circular array waveguide optical grating AWG2(8), send into first group of N intensity modulator IM(9), second group of carrier wave is through the second optic tunable filter TPF2(21) leach light wave, send into the 5th
circular array waveguide optical grating AWG5(22), send into second group of N intensity modulator IM(23); By first group of N intensity modulator IM(9) signal that modulates is through the 3rd
circular array waveguide optical grating AWG3(10), send into the first optical circulator OC1(13), by the first optical circulator OC1(13) the 2nd port output, through the first erbium-doped optical fiber amplifier EDFA 1(14) inject the first optical fiber link (15) after optical signal amplification; The upward signal of the 1st port output the first optical circulator OC1(13) is through the 4th
circular array waveguide optical grating AWG4(12) demultiplexing, sends into first group N upward signal receiver RX(11); By second group of N intensity modulator IM(23) signal that modulates is through the 6th
circular array waveguide optical grating AWG6(24), send into the second optical circulator OC2(27), by the second optical circulator OC2(27) the 2nd port output, through the second erbium-doped optical fiber amplifier EDFA 2(28) amplify after injection the second optical fiber link (29); The upward signal of the 1st port output the second optical circulator OC2(27) is through the 7th
circular array waveguide optical grating AWG7(26) demultiplexing, sends into second group N upward signal receiver RX(25); In the first optical fiber link and the second optical fiber link, composite signal is through distant-end node RN(16) in the 8th
circular array waveguide optical grating AWG8(17) and the 9th
circular array waveguide optical grating AWG9(30) after demultiplexing, by first group of profile fiber (18) and second component cloth optical fiber (31), be sent to optical network unit group ONU group (19) respectively; By the 8th
circular array waveguide optical grating AWG8(17) downstream signal of sending into optical network unit group ONU group (19) is through the 3rd optical circulator OC3(32) the 1st port send into the first optical power divider and be divided into two-way: a road is as the first optical network unit ONU _ 1(36) in the first downstream signal receiver RX_1(34) input, another road is as the second optical network unit ONU _ N+1(41) in the second reflective semiconductor optical amplifier RSOA2(40) modulate again up-link carrier; By the 9th
circular array waveguide optical grating AWG9(30) downstream signal of sending into optical network unit group ONU group (19) is through the 4th optical circulator OC4(37) the 1st port send into the first optical power divider and be divided into two-way: a road is as the first optical network unit ONU _ N+1(41) in the first downstream signal receiver RX_N+1(39) input, another road is as the first optical network unit ONU _ 1(36) in the first reflective semiconductor optical amplifier RSOA1(35) modulate again up-link carrier; The transmission means of upward signal is the inverse process of downstream signal transmission.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104320725A (en) * | 2014-04-14 | 2015-01-28 | 上海大学 | Orthogonal frequency division multiplexing passive optical network system based on polarization technique and photoproduction millimeter wave and transmission method thereof |
| CN107864025A (en) * | 2016-09-21 | 2018-03-30 | 朗美通经营有限责任公司 | Programmable multicast switch |
| CN114173225A (en) * | 2021-11-09 | 2022-03-11 | 武汉邮电科学研究院有限公司 | Novel passive optical network architecture based on discrete EDFA optical amplifier |
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| CN101924963B (en) * | 2010-09-21 | 2012-11-28 | 上海交通大学 | OFDMA (Orthogonal Frequency Division Multiplex Address)-based mixed passive optical network transmission system |
| CN102769807B (en) * | 2012-07-10 | 2015-10-07 | 上海大学 | Centralization light source orthogonal frequency division multiplexing passive optical network system and transmission method |
| CN102802093B (en) * | 2012-07-11 | 2015-10-07 | 上海大学 | The system of orthogonal frequency division multiplexing passive optical network defencive function and transmission method |
| CN102820945B (en) * | 2012-08-24 | 2015-09-30 | 武汉邮电科学研究院 | Based on passive optical network and the implementation method of Nyquist wavelength division multiplexing |
| CN103001911B (en) * | 2012-11-05 | 2016-03-30 | 上海大学 | From relevant detection orthogonal frequency division multiplexing passive optical network system and transmission method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104320725A (en) * | 2014-04-14 | 2015-01-28 | 上海大学 | Orthogonal frequency division multiplexing passive optical network system based on polarization technique and photoproduction millimeter wave and transmission method thereof |
| CN107864025A (en) * | 2016-09-21 | 2018-03-30 | 朗美通经营有限责任公司 | Programmable multicast switch |
| CN114173225A (en) * | 2021-11-09 | 2022-03-11 | 武汉邮电科学研究院有限公司 | Novel passive optical network architecture based on discrete EDFA optical amplifier |
| CN114173225B (en) * | 2021-11-09 | 2023-09-05 | 武汉邮电科学研究院有限公司 | Novel passive optical network architecture based on discrete EDFA optical amplifier |
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