CN102868443A - Orthogonal frequency division multiplexing passive optical network self-healing function realization system and transmission method - Google Patents
Orthogonal frequency division multiplexing passive optical network self-healing function realization system and transmission method Download PDFInfo
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- CN102868443A CN102868443A CN2012103494521A CN201210349452A CN102868443A CN 102868443 A CN102868443 A CN 102868443A CN 2012103494521 A CN2012103494521 A CN 2012103494521A CN 201210349452 A CN201210349452 A CN 201210349452A CN 102868443 A CN102868443 A CN 102868443A
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Abstract
The invention relates to an orthogonal frequency division multiplexing passive optical network self-healing function realization system and a transmission method. According to the system, a central local end is adopted, two erbium-doped fiber amplifiers are connected with a far-end node through two optical fiber links; the far-end node is connected with N optical network unit groups consisting of two optical network units through N2 paths of distributed optical fibers; the central local end consists of two outer cavity semiconductor lasers, two comb spectrum generators, N2 Mach-Zahnder modulators, N2 orthogonal frequency division multiplexing signal generators, N2 uplink signal receivers, N2 energy detectors, N2 optical switches, N2 circulators and two N1 circulating array waveguide gratings; and the far-end node only comprises two N1 circulating array waveguide gratings. The central local end has the design of the comb spectrum generators, the energy detectors, the optical switches and the optical network unit groups, the protection of feeder lines and distributed optical fibers and centralized management of the light source are realized.
Description
Technical field
The present invention relates to optical communication field, specifically relate to a kind of orthogonal frequency division multiplexing passive optical network (OFDM-PON) and realize from curing function system and transmission method.
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 fast development of a series of optical access networks such as EPON, GPON, Hybrid WDM/TDM-PON, OFDM-PON.Based on light positive, hand over the access network technology of frequency division multiplexing (OFDM) to carry out neatly the division of time domain and frequency domain resource, caused numerous researchers and communication equipment business's concern.Light OFDM spectrum efficiency is high, and capacity is large, can realize varigrained scheduling of resource, can meet service quality (QOS) and the bandwidth demand of different business.Access Network based on light OFDM not only can be realized jumbo light access, and can realize the seamless fusion of wireless and Wired access mode, all right compatible existing optical access network, realizes dynamic reconfigurable network and then Cost reduction.In addition, it also has broad application prospects aspect access long.Wave division multiplexing passive optical network WDM-PON technology can significantly promote the transmission capacity of network in the situation that do not change the physical basis framework bandwidth of upgrading, and realizes virtual point-to-point transmission, has natural fail safe.The present invention utilizes the advantage of existing WDN-PON, in conjunction with the advantage of light OFDM, the framework of system has been carried out to rational deployment, and the centralized management that system not only can realize light source is with Cost reduction, and can realize the protection of feeder line optical fiber and profile fiber.
Summary of the invention
The object of the invention is to the defect existed for prior art; provide a kind of orthogonal frequency division multiplexing passive optical network (OFDM-PON) to realize from curing function system and transmission method, can effectively realize that the centralized management of the protection of feeder line optical fiber and profile fiber and light source is with Cost reduction.
For achieving the above object, design of the present invention is: central local side CO adopts two external-cavity semiconductor laser to drive two pectination spectrum generator OFCG, produces and realizes the light source center management in the light carrier of different-waveband; In the local side CO of central authorities and optical network unit group, reasonable arrangement energy-probe P/M, optical switch OS, red blue filter R/B, can realize the protection of feeder line optical fiber and profile fiber effectively, realizes the healing function certainly of system.
According to the foregoing invention design, the present invention adopts following scheme:
A kind of orthogonal frequency division multiplexing passive optical network is realized from curing function system, pass through the first optical fiber link and the second optical fiber link remote node of the connection RN by central local side CO through the first erbium-doped optical fiber amplifier EDFA 1 and the second erbium-doped optical fiber amplifier EDFA 2, and distant-end node RN is connected the N group optical network unit group ONU Group that each is comprised of two optical network unit ONU respectively with second group of N road profile fiber through first group of N road profile fiber, it is characterized in that: 1) described central local side CO is: the first external-cavity semiconductor laser is connected respectively the first pectination spectrum generator OFCG1 and the second pectination spectrum generator OFCG2 with the second external-cavity semiconductor laser, N wavelength output port of the first pectination spectrum generator OFCG1 connects respectively first group N Mach zehnder modulators MZM, first group N Mach zehnder modulators MZM signal driver port is connected with first group N orthogonal frequency-division multiplex singal generator OFDM generator respectively, first group N Mach zehnder modulators MZM signal output port is connected with first group of N circulator respectively, port of first group of N circulator is connected with first group of N upward signal receiver respectively, first group N another port of circulator is connected with the 3rd port in first group of N optical switch OS respectively, first group of N upward signal receiver is connected with first group of N energy-probe P/M respectively, first group N energy-probe P/M another port is connected with first group of N optical switch OS respectively, in first group of N optical switch OS, the 1st port is connected with R port in first group of N red/blue filter R/B respectively, in first group of N optical switch OS, the 2nd port is connected with R port in second group of N red/blue filter R/B respectively, first group of N red/blue filter R/B another port connects respectively a N
1 circular array waveguide optical grating AWG1, a N
1 circular array waveguide optical grating AWG1 is connected with the first erbium-doped optical fiber amplifier EDFA 1, N wavelength output port of the second pectination spectrum generator OFCG2 connects respectively second group N Mach zehnder modulators MZM, second group N Mach zehnder modulators MZM signal driver port is connected with second group N orthogonal frequency-division multiplex singal generator OFDM generator respectively, second group N Mach zehnder modulators MZM signal output port is connected with second group of N circulator respectively, port of second group of N circulator is connected with second group of N upward signal receiver respectively, second group N another port of circulator is connected with the 3rd port in second group of N optical switch OS respectively, second group of N upward signal receiver is connected with second group of N energy-probe P/M respectively, second group of energy N detector P/M another port is connected with second group of N optical switch OS respectively, in second group of N optical switch OS, the 2nd port is connected with B port in second group of N red/blue filter R/B respectively, in second group of N optical switch OS, the 1st port is connected with B port in first group of N red/blue filter R/B respectively, second group of N red/blue filter R/B another port connects respectively the 2nd N
1 circular array waveguide optical grating AWG2, the 2nd N
1 circular array waveguide optical grating AWG2 is connected with the second erbium-doped optical fiber amplifier EDFA 2, 2) described distant-end node RN comprises the 31
n circular array waveguide optical grating AWG3 and the 41
two circular array waveguide optical grating AWG of N circular array waveguide optical grating AWG4, these two circular array waveguide optical grating AWG are connected N group each optical network unit group ONU Group be comprised of two optical network units respectively by first group of N road profile fiber with second group of N road profile fiber, 3) described 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 first an optical switch OS is connected the 31 by a road profile fiber in first group of profile fiber
n circular array waveguide optical grating AWG3, the 2nd port of this first optical switch OS connects the R port of second red/blue filter R/B, the 3rd port of this first optical switch OS connects first red/blue filter R/B, the two ends of first an energy-probe P/M connect respectively the first optical switch OS and the first downstream signal receiver RX_1, the R port of the described first red/blue filter R/B connects first power splitter, the B port of this first red/blue filter R/B connects first a reflective semiconductor optical amplifier RSOA, in the first power splitter, two ports connect respectively the first downstream signal receiver RX_1 and the second reflective semiconductor optical amplifier RSOA, the 2nd port of second an optical switch OS connects the 41 by a road profile fiber in second component cloth optical fiber
n circular array waveguide optical grating AWG4, the 1st port of this second optical switch OS connects the R port of first red/blue filter R/B, the 3rd port of this second optical switch OS connects second red/blue filter R/B, the two ends of second an energy-probe P/M connect respectively the second optical switch OS and the second downstream signal receiver RX_N+1, the B port of the described second red/blue filter R/B connects second power splitter, the R port of this second red/blue filter R/B connects second a reflective semiconductor optical amplifier RSOA, in the second power splitter, two ports connect respectively the second downstream signal receiver RX_N+1 and the first reflective semiconductor optical amplifier RSOA.
A kind of orthogonal frequency division multiplexing passive optical network is realized from the transmission method of curing function, adopt said system to be transmitted, it is characterized in that: the first external-cavity semiconductor laser in described central local side CO and the second external-cavity semiconductor laser simultaneously respectively emission wavelength be
with
plant light, for driving the first pectination spectrum generator OFCG1 and the second pectination spectrum generator OFCG2, the first pectination spectrum generator OFCG1 and the second pectination spectrum generator OFCG2 produce respectively N carrier wave
~
with
~
, these two groups of N carrier waves differ N FSR doubly, and the benefit of doing like this is to utilize circulating duct grating AWG,
the port that can pass through
also can pass through; By the first pectination spectrum generator OFCG1, produced
~
carrier wave is sent into respectively the carrier wave entrance of first group N Mach zehnder modulators MZM, and the signal input port of first group N Mach zehnder modulators MZM is driven by first group N orthogonal frequency-division multiplex singal generator OFDM generator; By the second pectination spectrum generator OFCG2, produced
~
carrier wave is sent into respectively second group N Mach zehnder modulators MZM, and second group N Mach zehnder modulators MZM signal input port driven by second group N orthogonal frequency-division multiplex singal generator OFDM generator; Under normal mode, in the local side CO of central authorities, the 3rd port of first group of N optical switch OS is connected with the 1st port, the 3rd port of second group of optical switch OS is connected with the 2nd port, in the optical network unit group ONU Group formed by two optical network unit OUN, the 1st, 3 ports of the first optical switch OS are connected, and the 2nd, 3 ports of the second optical switch OS are connected; The signal modulated by first group N Mach zehnder modulators MZM is by first group of N circulator, the 3rd, 1 port of first group of N optical switch OS, the R port of first group of red/blue filter R/B, finally by crossing a N
inject the first optical fiber link after 1 circular array waveguide optical grating AWG1 is multiplexing after the first erbium-doped optical fiber amplifier EDFA 1 optical signal amplification; The signal modulated by second group N Mach zehnder modulators MZM is by second group of N circulator, the 3rd, 2 ports of second group of N optical switch OS, the B port of second group of red/blue filter R/B, finally by crossing the 2nd N
inject the first optical fiber link after 1 circular array waveguide optical grating AWG2 is multiplexing after the second erbium-doped optical fiber amplifier EDFA 2 optical signal amplifications; In the first optical fiber link and the second optical fiber link, composite signal is in distant-end node RN the 31
n circular array waveguide optical grating AWG3 and the 41
be sent to optical network unit group ONU Group by first group of profile fiber and second component cloth optical fiber after N circular array waveguide optical grating AWG4 demultiplexing; By the 31
n circular array waveguide optical grating AWG3 sends into optical network unit group ONU Group downstream signal after the R port of the 1st, 3 ports of the first optical switch OS in the first optical network unit ONU _ 1, the first red/blue filter R/B, be divided into two-way by the first power splitter: 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 RSOA's in the second optical network unit ONU _ N+1 in another road; By the 41
n circular array waveguide optical grating AWG4 sends into optical network unit group ONU Group downstream signal after the B port of the 2nd, 3 ports of the second optical switch OS in the second optical network unit ONU _ N+1, the second red/blue filter R/B, be divided into two-way by the second power splitter: a road is as the demodulation of the second downstream signal receiver RX_N+1 in the second optical network unit ONU _ N+1, and up-link carrier is modulated again as the first reflective semiconductor optical amplifier RSOA's in the first optical network unit ONU _ 1 in another road.When the first feeder line optical fiber or the second feeder line optical fiber break down (the first feeder line fibercuts of take here is example), in central local side CO, in first group of energy-probe P/M and optical network unit group ONU Group, the first energy-probe P/M surveys less than energy, and these power detectors will be controlled first group of optical switch OS in central local side CO and be connected the 2nd port with the 3rd port translation of optical network unit group ONU Group; The signal modulated by first group N Mach zehnder modulators MZM carries out compound, compound signal through the 2nd N with the signal that second group N Mach zehnder modulators MZM modulates at second group of red/blue filter R/B after first group of optical switch OS
1 circular array waveguide optical grating AWG2 is again compound, finally send in optical network unit group ONU Group, the 2nd, 3 ports of composite signal second optical switch OS in the second optical network unit ONU _ N+1, the R port of downstream signal second red blue filter R/B in the second optical network unit ONU _ N+1 of corresponding the first optical network unit ONU _ 1 demodulation sends the first optical network unit ONU _ 1 to and carries out demodulation, and transmission means subsequently is identical during with normal transmission; The transmission means of upward signal is the inverse process of downstream signal transmission.
Compared with prior art, have following apparent outstanding substantive distinguishing features and remarkable advantage: 1) system utilizes the OFDM modulation technique can greatly increase the capacity of system in the present invention; 2) native system has proposed to adopt the pectination spectrum generator to produce light carrier at central local side, can realize the light source centralized management; 3) native system reasonable arrangement energy-probe P/M, optical switch OS, red blue filter R/B, can realize the protection of feeder line optical fiber and profile fiber effectively, realizes the healing function certainly of system.
The accompanying drawing explanation
Fig. 1 is that orthogonal frequency division multiplexing passive optical network of the present invention is realized from curing the function system structural representation
Fig. 2 is system optical network unit group structural representation in Fig. 1.
Embodiment
Accompanying drawings, 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 is realized from curing function system, by central local side CO(1) through the first erbium-doped optical fiber amplifier EDFA 1(12) and the second erbium-doped optical fiber amplifier EDFA 2(28) by the first optical fiber link (13) and the second optical fiber link (29) remote node of the connection RN(14), and distant-end node RN(14) be connected with second group of N road profile fiber (31) through first group of N road profile fiber (16) and distinguish N group optical network unit group ONU Group(17 that each is comprised of two optical network unit ONU).The local side CO(1 of central authorities) be: the first external-cavity semiconductor laser (2) is connected respectively the first pectination spectrum generator OFCG1(3 with the second external-cavity semiconductor laser (18)) and the second pectination spectrum generator OFCG2(19), the first pectination spectrum generator OFCG1(3) a N wavelength output port connects respectively first group N Mach zehnder modulators MZM(5), first group N Mach zehnder modulators MZM(5) the signal driver port respectively with first group N orthogonal frequency-division multiplex singal generator OFDM generator(4) be connected, first group N Mach zehnder modulators MZM(5) signal output port is connected with first group N circulator (7) respectively, (7) ports of first group of N circulator are connected with first group N upward signal receiver (6) respectively, another port of first group N circulator (7) respectively with first group of N optical switch OS(9) in the 3rd port be connected, first group N upward signal receiver (6) respectively with first group of N energy-probe P/M(8) be connected, first group of N energy-probe P/M(8) another port respectively with first group of N optical switch OS(9) be connected, first group of N optical switch OS(9) in the 1st port respectively with first group of N red/blue filter R/B(10) in the R port be connected, first group of N optical switch OS(9) in the 2nd port respectively with second group of N red/blue filter R/B(26) in the R port be connected, first group of N red/blue filter R/B(10) another port connects respectively a N
1 circular array waveguide optical grating AWG1(11), a N
1 circular array waveguide optical grating AWG1(11) with the first erbium-doped optical fiber amplifier EDFA 1(12) be connected, the second pectination spectrum generator OFCG2(19) a N wavelength output port connects respectively second group N Mach zehnder modulators MZM(21), second group N Mach zehnder modulators MZM(21) the signal driver port respectively with second group N orthogonal frequency-division multiplex singal generator OFDM generator(20) be connected, second group N Mach zehnder modulators MZM(21) signal output port is connected with second group N circulator (23) respectively, (23) ports of second group of N circulator are connected with second group N upward signal receiver (22) respectively, another port of second group N circulator (23) respectively with second group of N optical switch OS(25) in the 3rd port be connected, second group N upward signal receiver (22) respectively with second group of N energy-probe P/M(24) be connected, the 2nd N group energy-probe P/M(24) another port respectively with second group of N optical switch OS(25) be connected, second group of N optical switch OS(25) in the 2nd port respectively with second group of N red/blue filter R/B(26) in the B port be connected, second group of N optical switch OS(25) in the 1st port respectively with first group of N red/blue filter R/B(10) in the B port be connected, second group of N red/blue filter R/B(26) another port connects respectively the 2nd N
1 circular array waveguide optical grating AWG2(27), the 2nd N
1 circular array waveguide optical grating AWG2(27) with the second erbium-doped optical fiber amplifier EDFA 2(28) be connected, distant-end node RN(14) comprise the 31
n circular array waveguide optical grating AWG3(15) and the 41
n circular array waveguide optical grating AWG4(30) two circular array waveguide optical grating AWG, these two circular array waveguide optical grating AWG are connected N group each optical network unit group ONU Group(17 be comprised of two optical network unit ONU (38,45) respectively by first group of N road profile fiber (16) with second group of N road profile fiber (31)), network element group ONU Group(17) (45) two optical network units of the first optical network unit ONU (38) and the second optical network unit ONU, consist of: the 1st port first an optical switch OS(33) is connected the 31 by a road profile fiber in first group of profile fiber (16)
n circular array waveguide optical grating AWG3(15), this first optical switch OS(33) R port second red/blue filter R/B(41 of the 2nd port connection), this first optical switch OS(33) the 3rd port connects first red/blue filter R/B(34), a first energy-probe P/M(32) two ends connect respectively the first optical switch OS(33) and the first downstream signal receiver RX_1(36), the described first red/blue filter R/B(34) R port connects first power splitter (35), this first red/blue filter R/B(34) B port connects first a reflective semiconductor optical amplifier RSOA(37), in the first power splitter (35), two ports connect respectively the first downstream signal receiver RX_1(36) and the second reflective semiconductor optical amplifier RSOA(44), a second optical switch OS(40) the 2nd port connects the 41 by a road profile fiber in second component cloth optical fiber (31)
n circular array waveguide optical grating AWG4(30), this second optical switch OS(40) B port first red/blue filter R/B(34 of the 1st port connection), this second optical switch OS(40) the 3rd port connects second red/blue filter R/B(41), a second energy-probe P/M(39) two ends connect respectively the second optical switch OS(40) and the second downstream signal receiver RX_N+1(43), the described second red/blue filter R/B(41) B port connects second power splitter (42), this second red/blue filter R/B(41) R port connects second a reflective semiconductor optical amplifier RSOA(44), in the second power splitter (42), two ports connect respectively the second downstream signal receiver RX_N+1(43) and the first reflective semiconductor optical amplifier RSOA(37).
Embodiment bis-:
Referring to Fig. 1～Fig. 2, this orthogonal frequency division multiplexing passive optical network is realized from curing the function transmission method, adopt said system to realize the protection of feeder line optical fiber and profile fiber, described central local side CO(1) in the first external-cavity semiconductor laser (2) and the second external-cavity semiconductor laser (18) simultaneously respectively emission wavelength be
with
kind of light, for driving the first pectination spectrum generator OFCG1(3) and the second pectination spectrum generator OFCG2(19), the first pectination spectrum generator OFCG1(3) and the second pectination spectrum generator OFCG2(19) N carrier wave produced respectively
~
with
~
, these two groups of N carrier waves differ N FSR doubly, and the benefit of doing like this is to utilize circulating duct grating AWG,
the port that can pass through
also can pass through, by the first pectination spectrum generator OFCG1(4) produce
~
carrier wave is sent into respectively first group N Mach zehnder modulators MZM(5) the carrier wave entrance, first group N Mach zehnder modulators MZM(5) signal input port by first group N orthogonal frequency-division multiplex singal generator OFDM generator(4) driving, by the second pectination spectrum generator OFCG2(19) produce
~
carrier wave is sent into respectively second group N Mach zehnder modulators MZM(21), second group N Mach zehnder modulators MZM(21) signal input port is by second group N orthogonal frequency-division multiplex singal generator OFDM generator(20) driving, under normal mode, the local side CO(1 of central authorities) the 3rd port first group of N optical switch OS(9 in) is connected with the 1st port, second group of optical switch OS(25) the 3rd port is connected with the 2nd port, the optical network unit group ONU Group(17 formed by two optical network unit OUN) in, the first optical switch OS(33) the 1st, 3 ports are connected, the second optical switch OS(40) the 2nd, 3 ports be connected, by first group N Mach zehnder modulators MZM(5) signal that modulates is by first group N circulator (7), first group of N optical switch OS(9) the 3rd, 1 port, first group of red/blue filter R/B(10) the R port, finally by mistake the one N
1 circular array waveguide optical grating AWG1(11) after multiplexing through the first erbium-doped optical fiber amplifier EDFA 1(12) inject the first optical fiber link (13) after optical signal amplification, by second group N Mach zehnder modulators MZM(21) signal that modulates is by second group N circulator (23), second group of N optical switch OS(25) the 3rd, 2 ports, second group of red/blue filter R/B(26) the B port, finally by mistake the 2nd N
1 circular array waveguide optical grating AWG2(27) after multiplexing through the second erbium-doped optical fiber amplifier EDFA 2(28) inject the first optical fiber link (29) after optical signal amplification, composite signal is through distant-end node RN(14 in the first optical fiber link (13) and the second optical fiber link (29)) in the 31
n circular array waveguide optical grating AWG3(15) and the 41
n circular array waveguide optical grating AWG4(30) be sent to optical network unit group ONU Group(17 by first group of profile fiber (16) and second component cloth optical fiber (31) after demultiplexing), by the 31
n circular array waveguide optical grating AWG3(15) send into optical network unit group ONU Group(17) downstream signal is through the first optical network unit ONU _ 1(38) in the first optical switch OS(33) the 1st, 3 ports, the first red/blue filter R/B(34) after R port, be divided into two-way by the first power splitter (35): a road is as the first optical network unit ONU _ 1(38) in the first downstream signal receiver RX_1(36) demodulation, another road is as the second optical network unit ONU _ N+1(45) in the second reflective semiconductor optical amplifier RSOA(44) modulate again up-link carrier, by the 41
n circular array waveguide optical grating AWG4(30) send into optical network unit group ONU Group(17) downstream signal is through the second optical network unit ONU _ N+1(45) in the second optical switch OS(40) the 2nd, 3 ports, the second red/blue filter R/B(41) after B port, be divided into two-way by the second power splitter (42): a road is as the second optical network unit ONU _ N+1(45) in the second downstream signal receiver RX_N+1(43) demodulation, another road is as the first optical network unit ONU _ 1(38) in the first reflective semiconductor optical amplifier RSOA(37) modulate again up-link carrier.When the first feeder line optical fiber (13) or the second feeder line optical fiber (29) (are fractured into example with the first feeder line optical fiber (13) here) while breaking down, at central local side CO(1) in first group of energy-probe P/M(8) and optical network unit group ONU Group(17) in the first energy-probe P/M(32) survey less than energy, these power detectors will be controlled central local side CO(1) in first group of optical switch OS(9) with optical network unit group ONU Group(17) the 3rd port translation be connected the 2nd port; By first group N Mach zehnder modulators MZM(5) signal that modulates is through first group of optical switch OS(9) after with second group N Mach of zehnder modulators MZM(21) signal that modulates is at second group of red/blue filter R/B(26) carry out compound, compound signal through the 2nd N
1 circular array waveguide optical grating AWG2(27) again compound, finally send optical network unit group ONU Group(17 to) in, composite signal is through the second optical network unit ONU _ N+1(45) in the second optical switch OS(40) the 2nd, 3 ports, corresponding the first optical network unit ONU _ 1(38) downstream signal of demodulation is through the second optical network unit ONU _ N+1(45) in the second red blue filter R/B(41) the R port send the first optical network unit ONU _ 1(38 to) carry out demodulation, transmission means subsequently is identical during with normal transmission; The transmission means of upward signal is the inverse process of downstream signal transmission.
Claims (2)
1. an orthogonal frequency division multiplexing passive optical network is realized from curing function system, by central local side CO(1) through the first erbium-doped optical fiber amplifier EDFA 1(12) and the second erbium-doped optical fiber amplifier EDFA 2(28) by the first optical fiber link (13) and the second optical fiber link (29) remote node of the connection RN(14), and distant-end node RN(14) through first group of N road profile fiber (16), with second group of N road profile fiber (31), be connected respectively respectively by two optical network unit ONU (38, 45) the N group optical network unit group ONU Group(17 formed), it is characterized in that:
1) be described central local side CO(1): the first external-cavity semiconductor laser (2) is connected respectively the first pectination spectrum generator OFCG1(3 with the second external-cavity semiconductor laser (18)) and the second pectination spectrum generator OFCG2(19); the first pectination spectrum generator OFCG1(3) a N wavelength output port connects respectively first group N Mach zehnder modulators MZM(5), first group N Mach zehnder modulators MZM(5) the signal driver port respectively with first group N orthogonal frequency-division multiplex singal generator OFDM generator(4) be connected, first group N Mach zehnder modulators MZM(5) signal output port is connected with first group N circulator (7) respectively, (7) ports of first group of N circulator are connected with first group N upward signal receiver (6) respectively, another port of first group N circulator (7) respectively with first group of N optical switch OS(9) in the 3rd port be connected, first group N upward signal receiver (6) respectively with first group of N energy-probe P/M(8) be connected, first group of N energy-probe P/M(8) another port respectively with first group of N optical switch OS(9) be connected, first group of N optical switch OS(9) in the 1st port respectively with first group of N red/blue filter R/B(10) in the R port be connected, first group of N optical switch OS(9) in the 2nd port respectively with second group of N red/blue filter R/B(26) in the R port be connected, first group of N red/blue filter R/B(10) another port connects respectively a N
1 circular array waveguide optical grating AWG1(11), a N
1 circular array waveguide optical grating AWG1(11) with the first erbium-doped optical fiber amplifier EDFA 1(12) be connected, the second pectination spectrum generator OFCG2(19) a N wavelength output port connects respectively second group N Mach zehnder modulators MZM(21), second group N Mach zehnder modulators MZM(21) the signal driver port respectively with second group N orthogonal frequency-division multiplex singal generator OFDM generator(20) be connected, second group N Mach zehnder modulators MZM(21) signal output port is connected with second group N circulator (23) respectively, (23) ports of second group of N circulator are connected with second group N upward signal receiver (22) respectively, another port of second group N circulator (23) respectively with second group of N optical switch OS(25) in the 3rd port be connected, second group N upward signal receiver (22) respectively with second group of N energy-probe P/M(24) be connected, second group of N energy-probe P/M(24) another port respectively with second group of N optical switch OS(25) be connected, second group of N optical switch OS(25) in the 2nd port respectively with second group of N red/blue filter R/B(26) in the B port be connected, second group of N optical switch OS(25) in the 1st port respectively with first group of N red/blue filter R/B(10) in the B port be connected, second group of N red/blue filter R/B(26) another port connects respectively the 2nd N
1 circular array waveguide optical grating AWG2(27), the 2nd N
1 circular array waveguide optical grating AWG2(27) with the second erbium-doped optical fiber amplifier EDFA 2(28) be connected,
2) described distant-end node RN(14) comprise the 31
n circular array waveguide optical grating AWG3(15) and the 41
n circular array waveguide optical grating AWG4(30) two circular array waveguide optical grating AWG, these two circular array waveguide optical grating AWG are connected by first group of N road profile fiber (16) the optical network unit group ONU Group(17 that the N group is comprised of two optical network unit ONU (38,45) respectively with second group of N road profile fiber (31));
3) described optical network unit group ONU Group(17) (45) two optical network units of the first optical network unit ONU (38) and the second optical network unit ONU, consist of: the 1st port first an optical switch OS(33) is connected the 31 by a road profile fiber in first group of profile fiber (16)
n circular array waveguide optical grating AWG3(15), this first optical switch OS(33) R port second red/blue filter R/B(41 of the 2nd port connection), this first optical switch OS(33) the 3rd port connects first red/blue filter R/B(34), a first energy-probe P/M(32) two ends connect respectively the first optical switch OS(33) and the first downstream signal receiver RX_1(36), the described first red/blue filter R/B(34) R port connects first power splitter (35), this first red/blue filter R/B(34) B port connects first a reflective semiconductor optical amplifier RSOA(37), in the first power splitter (35), two ports connect respectively the first downstream signal receiver RX_1(36) and the second reflective semiconductor optical amplifier RSOA(44), a second optical switch OS(40) the 2nd port connects the 41 by a road profile fiber in second component cloth optical fiber (31)
n circular array waveguide optical grating AWG4(30), this second optical switch OS(40) B port first red/blue filter R/B(34 of the 1st port connection), this second optical switch OS(40) the 3rd port connects second red/blue filter R/B(41), a second energy-probe P/M(39) two ends connect respectively the second optical switch OS(40) and the second downstream signal receiver RX_N+1(43), the described second red/blue filter R/B(41) B port connects second power splitter (42), this second red/blue filter R/B(41) R port connects second a reflective semiconductor optical amplifier RSOA(44), in the second power splitter (42), two ports connect respectively the second downstream signal receiver RX_N+1(43) and the first reflective semiconductor optical amplifier RSOA(37).
2. hand over frequency division multiplexing passive optical network to realize from curing function positive transmission method for one kind, adopt orthogonal frequency division multiplexing passive optical network according to claim 1 to realize it is characterized in that from curing protection and the light source centralized management that function system is realized feeder line optical fiber and profile fiber: the first ECLD (2) described central local side CO(1) and the second ECLD (18) simultaneously respectively emission wavelength be
with
kind of light, for driving the first pectination spectrum generator OFCG1(3) and the second pectination spectrum generator OFCG2(19), the first pectination spectrum generator OFCG1(3) and the second pectination spectrum generator OFCG2(19) N carrier wave produced respectively
~
with
~
, these two groups of N carrier waves differ N FSR doubly, and the benefit of doing like this is to utilize circulating duct grating AWG,
the port that can pass through
also can pass through, by the first pectination spectrum generator OFCG1(4) produce
~
carrier wave is sent into respectively first group N Mach zehnder modulators MZM(5) the carrier wave entrance, first group N Mach zehnder modulators MZM(5) signal input port by first group N orthogonal frequency-division multiplex singal generator OFDM generator(4) driving, by the second pectination spectrum generator OFCG2(19) produce
~
carrier wave is sent into respectively second group N Mach zehnder modulators MZM(21), second group N Mach zehnder modulators MZM(21) signal input port is by second group N orthogonal frequency-division multiplex singal generator OFDM generator(20) driving, under normal mode, the local side CO(1 of central authorities) the 3rd port first group of N photoswitch OS(9 in) is connected with the 1st port, second group of photoswitch OS(25) the 3rd port is connected with the 2nd port, the optical network unit group ONU Group(17 formed by two optical network unit OUN) in, the first photoswitch OS(33) the 1st, 3 ports are connected, the second photoswitch OS(40) the 2nd, 3 ports be connected, by first group N Mach zehnder modulators MZM(5) signal that modulates is by first group N circulator (7), first group of N photoswitch OS(9) the 3rd, 1 port, first group of red/blue wave filter R/B(10) the R port, finally by mistake the one N
1 circular array waveguide optical grating AWG1(11) after multiplexing through the first erbium-doped optical fiber amplifier EDFA 1(12) inject the first optical fiber link (13) after optical signal amplification, by second group N Mach zehnder modulators MZM(21) signal that modulates is by second group N circulator (23), second group of N photoswitch OS(25) the 3rd, 2 ports, second group of red/blue wave filter R/B(26) the B port, finally by mistake the 2nd N
1 circular array waveguide optical grating AWG2(27) after multiplexing through the second erbium-doped optical fiber amplifier EDFA 2(28) inject the first optical fiber link (29) after optical signal amplification, composite signal is through distant-end node RN(14 in the first optical fiber link (13) and the second optical fiber link (29)) in the 31
N circular array waveguide optical grating AWG3(15) and the 41
N circular array waveguide optical grating AWG4(30) be sent to optical network unit group ONU Group(17 by first group of profile fiber (16) and second component cloth optical fiber (31) after demultiplexing), by the 31
N circular array waveguide optical grating AWG3(15) send into optical network unit group ONU Group(17) downstream signal is through the first optical network unit ONU _ 1(38) in the first photoswitch OS(33) the 1st, 3 ports, the first red/blue wave filter R/B(34) after R port, be divided into two-way by the first power splitter (35): a road is as the first optical network unit ONU _ 1(38) in the first downstream signal receiver RX_1(36) demodulation, another road is as the second optical network unit ONU _ N+1(45) in the second reflective semiconductor optical amplifier RSOA(44) modulate again up-link carrier, by the 41
N circular array waveguide optical grating AWG4(30) send into optical network unit group ONU Group(17) downstream signal is through the second optical network unit ONU _ N+1(45) in the second photoswitch OS(40) the 2nd, 3 ports, the second red/blue wave filter R/B(41) after B port, be divided into two-way by the second power splitter (42): a road is as the second optical network unit ONU _ N+1(45) in the second downstream signal receiver RX_N+1(43) demodulation, another road is as the first optical network unit ONU _ 1(38) in the first reflective semiconductor optical amplifier RSOA(37) modulate again up-link carrier, when the first feeder line optical fiber (13) or the second feeder line optical fiber (29) (are fractured into example with the first feeder line optical fiber (13) here) while breaking down, at central local side CO(1) in first group of energy-probe P/M(8) and optical network unit group ONU Group(17) in the first energy-probe P/M(32) survey less than energy, these power detectors will be controlled central local side CO(1) in first group of photoswitch OS(9) with optical network unit group ONU Group(17) the 3rd port translation be connected the 2nd port, by first group N Mach zehnder modulators MZM(5) signal that modulates is through first group of photoswitch OS(9) after with second group N Mach of zehnder modulators MZM(21) signal that modulates is at second group of red/blue wave filter R/B(26) carry out compound, compound signal through the 2nd N
1 circular array waveguide optical grating AWG2(27) again compound, finally send optical network unit group ONU Group(17 to) in, composite signal is through the second optical network unit ONU _ N+1(45) in the second photoswitch OS(40) the 2nd, 3 ports, corresponding the first optical network unit ONU _ 1(38) downstream signal of demodulation is through the second optical network unit ONU _ N+1(45) in the second red blue wave filter R/B(41) the R port send the first optical network unit ONU _ 1(38 to) carry out demodulation, transmission means subsequently is identical during with normal transmission, the transmission means of upward signal is the inverse process of downstream signal transmission.
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