CN104079344B - The system and method that a kind of passive optical network realizes Wavelength reuse and defencive function - Google Patents
The system and method that a kind of passive optical network realizes Wavelength reuse and defencive function Download PDFInfo
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- CN104079344B CN104079344B CN201410162172.9A CN201410162172A CN104079344B CN 104079344 B CN104079344 B CN 104079344B CN 201410162172 A CN201410162172 A CN 201410162172A CN 104079344 B CN104079344 B CN 104079344B
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Abstract
The present invention relates to the system and method that a kind of passive optical network realizes Wavelength reuse and defencive function.The system is optical line terminal OLT by feeding back optical fiber remote node of the connection RN, distant-end node RN by profile fiber connecting optical network unit ONU, is interconnected between optical network unit by profile fiber.Optical line terminal OLT is made of transmitter, array waveguide grating, phase-modulator, erbium doped optical fibre light amplifier, optical circulator, light amplitude receiver, photo-coupler, optical attenuator；Distant-end node RN is by array waveguide grating, spectral module, Coarse Wave Division Multiplexer, light optical circulator；Optical network unit ONU is by optical splitter, detector, photoswitch, optical attenuator, Coarse Wave Division Multiplexer, semiconductor optical amplifier, light amplitude receiver, light phase receiver, Fiber Bragg Grating FBG, optical circulator, demultiplexer.The present invention, which realizes, is used for multiple times Same Wavelength, system has been reached equilibrium between cost and performance.
Description
Technical field
The present invention relates to optical communication field, is specifically related to a kind of Wave division multiplexing passive optical network (WDM-PON) and realizes ripple
The long system and method reused with defencive function.
Background technology
Wave division multiplexing passive optical network WDM-PON technologies can upgrade band in the case where not changing physical basis equipment
Width, significantly lifts the transmission capacity of network, realizes virtual point-to-point transmission, information will not be shared between each user, has
There is natural security, gather around and have broad application prospects in optical access network, it is considered to be the final choice of FTTx future evolution.
The research for WDM-PON is mainly based upon static Wavelength Assignment at present, and wavelength is fixed on RN Zhong Xia roads, and ONU is got over
It is more.How in the case where you increase light resource further increase ONU quantity, and keep the stability optical-fiber network of network there is an urgent need for solution
A problem certainly.Colorless ONU has become the common recognition of current WDM-PON correlative studys, the technical solution based on colorless ONU substantially
It is the mainstream of WDM-PON systems.Furthermore optical-fiber network has high transmission rate, therefore it is quilt within the time as short as possible
It is also highly important that the business of interruption, which finds new transmission route and self-healing scheme,.The present invention carries out the architectural framework of system
Rational layout, system not only realizes Wavelength reuse and the protection to profile fiber at the same time, but also can utilize current network,
So that system can also reach perfect condition between cost and performance.
The content of the invention
It is an object of the invention to for existing Star Network, there is provided a kind of Wavelength division multiplexing-passive light net (WDM-PON)
The system and method for realizing Wavelength reuse and defencive function, can effectively be improved in WDM-PON to the utilization rate of light resource and
Protection to profile fiber.
To reach above-mentioned purpose, core concept of the invention is：In optical line terminal OLT to each wavelength all into line amplitude tune
System and phase-modulation.A kind of newly-designed spectral module is used at RN, by the frame mode of this new distant-end node RN,
Realize the reuse of wavelength.When modulated signals are transmitted to RN, under array waveguide grating route, each optical network unit ONU can
Receive 3 light waves, in optical network unit ONU, the demultiplexing of wavelength is realized by demultiplexer.Receiver is according to different demodulation
Mode demodulates each wavelength, obtains different downlink informations and broadcast message, and carry out uplink modulation respectively to each wavelength.
Conceived according to foregoing invention, the present invention uses following technical proposal：
The system and method that a kind of novel passive optical network realizes Wavelength reuse and defencive function, by optical line terminal OLT
1 distant-end node RN is connected by 2 single mode optical fibers, distant-end node RN connects two groups of optical-fiber networks respectively by two groups of profile fibers
Unit, two groups of optical network units are interconnected by one group of profile fiber；It is characterized in that：
1) optical line terminal OLT described in is to be connected respectively to the one the second two groups by two groups of common 8*N optical senders to be total to
8xN photoswitch, the first port of first group of photoswitch are connected to the first coupler, and the first coupler is connected to the first decay
Device, the first attenuator are connected to the 3rd coupler, the 3rd coupler connection first phase modulator again, and first phase modulator connects
The first erbium-doped fiber amplifier is connected to, erbium-doped fiber amplifier is connected with the first port of first annular device, the first annular device
Second port be connected with the first single mode optical fiber, the 3rd port of the first annular device and the first end of the first Coarse Wave Division Multiplexer
Mouth is connected, and the second port of the first Coarse Wave Division Multiplexer is connected with the 5th coupler first port, the first Coarse Wave Division Multiplexer
3rd port is connected with the 3rd erbium-doped fiber amplifier, and the 3rd erbium-doped fiber amplifier is connected with the 5th coupler second port,
The second port of first group of photoswitch is connected to the 4th coupler, and the first port of second group of photoswitch is connected to the 3rd coupling
Device, the second port of second group of photoswitch are connected to the second coupler, and the second coupler is connected to the second attenuator, the second decay
Device is connected to the 4th coupler, the 4th coupler connection second phase modulator again, and second phase modulator is connected to second and mixes
Doped fiber amplifier, the second erbium-doped fiber amplifier are connected with the first port of the second circulator, and the second of second circulator
Port is connected with the second single mode optical fiber, the 3rd port of second circulator and the first port phase of the second Coarse Wave Division Multiplexer
Even, the second port of the second Coarse Wave Division Multiplexer is connected with the 3rd port of the 5th coupler, and the 3rd of the second Coarse Wave Division Multiplexer the
Port is connected with the 4th erbium-doped fiber amplifier, and the 4th erbium-doped fiber amplifier is connected with the 4th port of the 5th coupler, and the 5th
Coupler fifth port connects the first array waveguide grating, and each delivery outlet of the first array waveguide grating is connected with receiver, described
Single mode optical fiber is connected with the Coarse Wave Division Multiplexer in the distant-end node RN respectively；
2) the distant-end node RN be the 3rd coarse wavelength division multiplexing output terminal respectively with the three, the four, the five, the 6th rings
The second port circuit of shape device, the 3rd port of the three, the four, the five, the 6th circulators are respectively connected to the first spectral module
First, second, third, fourth port, the first ports of the three, the four, the five, the 6th circulators is respectively connected to second,
Three, the four, the 5th array waveguide gratings, the 4th coarse wavelength division multiplexing output terminal are annular with the seven, the eight, the nine, the tenth respectively
The second port of device is connected, and the 3rd port of the seven, the eight, the nine, the tenth circulators is respectively connected to the second spectral module
First, second, third, fourth port, the first port of the 7th, the 8th, the 9th, the tenth circulator are respectively connected to second,
3rd, the four, the 5th array waveguide grating, second, third, fourth, fifth array waveguide grating connection profile fiber；
3) profile fiber is connected with optical network unit, and optical network unit is connected by profile fiber, each optical-fiber network
Unit ONU includes 1 the first optical splitter, 1 the second optical splitter, 1 the first detector, 1 the second detector, 1 the first light
Switch, 1 the second photoswitch, 1 the 5th Coarse Wave Division Multiplexer, 1 the 6th Coarse Wave Division Multiplexer, 1 the 11st optical circulator,
1 the 12nd optical circulator, 1 the first demultiplexer, 1 semiconductor optical amplifier, 1 the first amplitude modulator, 1 first
Phase receivers RX2, 1 the first amplitude receiver RX1.Under normal circumstances, the profile fiber, with the first photoswitch second end
Mouth is connected, and the first port that the first photoswitch first port is connected to the 5th Coarse Wave Division Multiplexer is connected, the 3rd port connection one
A first Fiber Bragg Grating FBG；The second port of 5th Coarse Wave Division Multiplexer is connected with the second port of the 11st circulator,
3rd port of the 11st circulator is connected with the first port of the first demultiplexer, the first port of the first demultiplexer and the
One diode image intensifer is connected, second port and the first phase receiver RX of the first demultiplexer2It is connected, the first demultiplexing
3rd port of device and the first amplitude receiver RX1It is connected, the first diode image intensifer is connected with the first amplitude modulator, width
Degree modulator is connected to the tenth second ring device first port, and the tenth second ring device second port is connected to the 6th Coarse Wave Division Multiplexer
Second port, the 3rd port of the tenth second ring device are connected to the 11st optical circulator first port, the 6th Coarse Wave Division Multiplexer
Three ports are connected with the 3rd port of the 5th Coarse Wave Division Multiplexer, and the 6th Coarse Wave Division Multiplexer first port is connected to the second light and opens
First port is closed, the 3rd port of the second photoswitch is connected to optical network unit, and second port connects the second light through the 3rd attenuator
Fine Bragg grating.
A kind of method that passive optical network realizes Wavelength reuse and defencive function, using nothing according to claim 1
Source optical-fiber network realizes the system operatio of Wavelength reuse and defencive function, it is characterised in that：In the normal mode, during downlink transfer,
Optical sender launches that 4*N amplitude is loaded with the red wave band light wave of downlink information and 4*N amplitude is loaded with downlink information at the same time
Blue wave band light wave, by taking red wave band as an example, respectively enters the first coupler, light wave is after attenuator is decayed under the route of photoswitch
Into the 3rd coupler, enter first phase modulator load broadcast information afterwards, then light wave enters the first Erbium-doped fiber amplifier
Device, the amplified first port into first annular device, and enter the first single mode from the second port output of first annular device
Optical fiber, then light wave enter distant-end node in the 3rd Coarse Wave Division Multiplexer, through the 3rd Coarse Wave Division Multiplexer demultiplexing after, first
Group, the second group, the 3rd group, the 4th group's light wave respectively enter the first, second, third, fourth of the first spectral module
Port, the second group, the 3rd group, the 4th group export from the first port of the first spectral module, into the first Waveguide array
The port 0 of grating, enters the first optical network unit from the output port of the first array waveguide grating via profile fiber.Into
After one optical network unit, through the first optical splitter, under the route of photoswitch, into after the 5th Coarse Wave Division Multiplexer, red wave band
Light wave will be exported from the second port of Coarse Wave Division Multiplexer, and then, light wave enters the second port of the 11st optical circulator, from this
The 3rd port output of circulator enters demultiplexer, and the light wave exported from the first port of the demultiplexer is by the first diode
Image intensifer shaping, the light wave exported from the second port of the demultiplexer is received by phase receivers, from the demultiplexer
The light wave of 3rd port output is received by amplitude receiver.Light wave after diode image intensifer shaping enters amplitude modulator
Uplink information is loaded, into the first port of the tenth second ring device, is exported from the second port of the circulator, into the 6th thick ripple
Exported after division multiplexer from first port, profile fiber is entered under the route of the second photoswitch, afterwards into optical network unit
4th photoswitch, enters the 8th Coarse Wave Division Multiplexer, from the 3rd port of the 8th Coarse Wave Division Multiplexer under the route of photoswitch
Output, the 3rd port of the 7th Coarse Wave Division Multiplexer is entered by the 4th optical splitter, from the first end of the 7th Coarse Wave Division Multiplexer
The output of mouth, into the 3rd photoswitch, enters the 3rd optical splitter under the route of the 3rd photoswitch, enters by profile fiber remote
First array waveguide grating of end node, enters the tenth optical circulator afterwards, and it is thick that the 4th is entered under the route of the tenth optical circulator
Wavelength division multiplexer, enters the second single mode optical fiber under the multiplexing of the 4th Coarse Wave Division Multiplexer, enter optical link through the second single mode optical fiber
Terminal, enters the second Coarse Wave Division Multiplexer, from the second coarse wavelength division multiplexing in optical line terminal under the route of the second optical circulator
3rd port of device is output and then enter array waveguide grating, and final light wave is received into receiver, obtains uplink information.
A kind of method that passive optical network realizes Wavelength reuse and defencive function, it is characterised in that：When single mode optical fiber occurs
Failure, detector can not detect downlink information in optical network unit, and control photoswitch gets to the 3rd port, in optical line terminal
Receiver will not receive signal, they will control photoswitch get to the 3rd port, photoswitch gets to red indigo plant behind the 3rd port
Wave band is coupled into coupler, enters second phase modulator load broadcast information afterwards, then light wave enters the second er-doped
Fiber amplifier, the amplified first port for entering the second circulator, and export and enter from the second port of the second circulator
Second single mode optical fiber, then light wave enter distant-end node in the 4th Coarse Wave Division Multiplexer, demultiplexed through the 4th Coarse Wave Division Multiplexer
With rear, the first group, the second group, the 3rd group, the 4th group's light wave respectively enter the second spectral module first, second,
Three, the 4th ports, the second group, the 3rd group, the 4th group export from the first port of the second spectral module, into first
The port 0 of array waveguide grating, enters the second optical-fiber network list from the output port of the first array waveguide grating via profile fiber
Member.Into after the second optical network unit, through the 3rd optical splitter, under the route of photoswitch, into the 7th Coarse Wave Division Multiplexer
Afterwards, red wave band light wave will be exported from the second port of Coarse Wave Division Multiplexer, then, through the 4th optical splitter, into the 8th thick ripple
Division multiplexer, exports from the first port of the 8th Coarse Wave Division Multiplexer, into after the 3rd single mode optical fiber, subsequently enters optical-fiber network list
4th photoswitch of member, enters the 6th Coarse Wave Division Multiplexer, from the second of the 6th Coarse Wave Division Multiplexer under the route of photoswitch
Port exports, and light wave enters the second port of the 11st optical circulator, and light wave subsequently enters the 5th optical circulator, opened in the first light
The route of pass is reflected into the first Fiber Bragg Grating FBG, under the route of photoswitch, into the 5th Coarse Wave Division Multiplexer
Afterwards, red wave band light wave will be exported from the second port of Coarse Wave Division Multiplexer, and then, light wave enters the second of the 11st optical circulator
Port, from the 3rd port of the circulator, output enters demultiplexer, the light wave quilt exported from the first port of the demultiplexer
First diode image intensifer shaping, the light wave exported from the second port of the demultiplexer is received by phase receivers, from this
The light wave of the 3rd port output of demultiplexer is received by amplitude receiver.Light wave after diode image intensifer shaping enters
Amplitude modulator loads uplink information, into the first port of the tenth second ring device, is exported from the second port of the circulator, into
Exported after entering the 6th Coarse Wave Division Multiplexer from first port, profile fiber is entered under the route of the second photoswitch, afterwards into light
4th photoswitch of network unit, enters the 8th Coarse Wave Division Multiplexer, from the 8th Coarse Wave Division Multiplexer under the route of photoswitch
The 3rd port output, by the 4th optical splitter enter the 7th Coarse Wave Division Multiplexer the 3rd port, from the 7th coarse wavelength division multiplexing
The output of the first port of device, into the 3rd photoswitch, enters the 3rd optical splitter, by distribution under the route of the 3rd photoswitch
Optical fiber enters the first array waveguide grating of distant-end node, enters the tenth optical circulator afterwards, under the route of the tenth optical circulator
Into the 4th Coarse Wave Division Multiplexer, the second single mode optical fiber is entered under the multiplexing of the 4th Coarse Wave Division Multiplexer, through the second single mode optical fiber
Into optical line terminal, enter the second Coarse Wave Division Multiplexer under the route of the second optical circulator in optical line terminal, from second
3rd port of Coarse Wave Division Multiplexer is output and then enter array waveguide grating, and final light wave is received into receiver, obtained
Uplink information.
Compared with prior art, unique advantage of the invention and conspicuousness characteristic are：(1) by using red blue wave band,
Coherent interference is eliminated, improves network performance；(2) design of optical network unit, there is provided the protection (3) to profile fiber passes through
The design of spectral module, realizes the reuse of wavelength, the sourceless characteristic of the network of holding.
Brief description of the drawings
Fig. 1 is that one embodiment of the invention demonstrate,proves the system signal that novel passive optical network realizes Wavelength reuse and defencive function
Figure.
Fig. 2 is the schematic diagram of optical network unit ONU internal structure in Wave division multiplexing passive optical network.
Fig. 3 is the service system schematic diagram that novel passive optical network realizes Wavelength reuse and defencive function under protected mode.
Fig. 4 is the schematic diagram of optical network unit ONU internal structure in Wave division multiplexing passive optical network under protected mode.
Embodiment
Details are as follows for the preferred embodiment of the present invention combination attached drawing：
Embodiment one：
Referring to Fig. 1 and Fig. 2, system that this passive optical network realizes Wavelength reuse and defencive function, by optical line terminal OLT
(1 ') connects 1 distant-end node RN (2 ') by 2 single mode optical fibers (31,32), and distant-end node RN (2 ') passes through two component lighting
Fine (49,50) connect two groups of optical network units (51,52) respectively, and two groups of optical network units (51,52) pass through one group of profile fiber
(91) interconnect.
The optical line terminal OLT (1 ') is to be connected respectively to first by two groups of common 8*N optical senders (1,2,3,4)
The second two groups of common 8xN photoswitches (5,6,7,8), the first port of first group of photoswitch (5,6) are connected to the first coupler
(9), the first coupler (9) is connected to the first attenuator (11), the first attenuator (11) and is connected to the 3rd coupler (13), and
Three couplers (13) connection first phase modulator (15), the first modulator (15) are connected to the first erbium-doped fiber amplifier
(17), erbium-doped fiber amplifier (17) is connected with the first port of first annular device (19), and the second of the first annular device (19)
Port is connected with the first single mode optical fiber (31), the 3rd port and the first Coarse Wave Division Multiplexer (21) of the first annular device (19)
First port is connected, and the second port of the first Coarse Wave Division Multiplexer (21) is connected with the 5th coupler (25) first port, and first
3rd port of Coarse Wave Division Multiplexer (21) is connected with the 3rd erbium-doped fiber amplifier (23), the 3rd erbium-doped fiber amplifier (23)
It is connected with the 5th coupler (25) second port, the second port of first group of photoswitch (5,6) is connected to the 4th coupler (14),
The first port of second group of photoswitch (7,8) is connected to the 3rd coupler (13), and the second port of second group of photoswitch (7,8) connects
The second coupler (10) is connected to, the second coupler (10) is connected to and attenuator (12), the second attenuator (12) and is connected to
4th coupler (14), the 4th coupler (14) connection second phase modulator (16), second phase modulator (16) are connected to
Second erbium-doped fiber amplifier (18), the second erbium-doped fiber amplifier (18) are connected with the first port of the second circulator (20),
The second port of second circulator (20) is connected with the second single mode optical fiber (32), the 3rd port of second circulator (20) with
The first port of second Coarse Wave Division Multiplexer (22) is connected, second port and the 5th coupler of the second Coarse Wave Division Multiplexer (22)
(25) the 3rd ports are connected, and the 3rd port of the second Coarse Wave Division Multiplexer (22) is connected with the 4th erbium-doped fiber amplifier (24),
4th erbium-doped fiber amplifier (24) is connected with the 4th port of the 5th coupler (25), the connection of the 5th coupler (25) fifth port
First array waveguide grating (26), the first array waveguide grating (26) each delivery outlet are connected with receiver (27,28,29,30), institute
Single mode optical fiber (31,32) is stated respectively with the Coarse Wave Division Multiplexer (33,34) in the distant-end node RN (2 ') to be connected.
The distant-end node RN (2 ') be the 3rd coarse wavelength division multiplexing (33) output terminal respectively with the three, the four, the 5th,
The second port circuit of 6th circulator (35,36,37,38), the three, the four, the five, the 6th circulators (35,36,37,38)
The 3rd port be respectively connected to first, second, third, fourth port of the first spectral module (43), the three, the four, the 5th,
The first port of 6th circulator (35,36,37,38) is respectively connected to second, third, fourth, fifth array waveguide grating
(45,46,47,48), the 4th coarse wavelength division multiplexing (34) output terminal respectively with the seven, the eight, the nine, the tenth circulators (39,40,
41,42) second port is connected, and the 3rd port of the seven, the eight, the nine, the tenth circulators (39,40,41,42) connects respectively
To first, second, third, fourth port of the second spectral module (44), the seven, the eight, the nine, the tenth circulators (39,40,
41,42) first port is respectively connected to second, third, fourth, fifth array waveguide grating (45,46,47,48), second,
Three, the four, the 5th array waveguide gratings (45,46,47,48) connection profile fiber (49,50).
Two groups of profile fibers (50,49) are connected with two groups of optical network units (51,52), two groups of optical network units (51,
52) by one group of profile fiber (91) be connected, each optical network unit (51,52) include 1 the first optical splitter (57,58), 1
Second optical splitter (83,84), 1 the first detector (59,60), 1 the second detector (85,86), 1 the first photoswitch (61,
62), 1 the second photoswitch (81,82), 1 the 5th Coarse Wave Division Multiplexer (63,64), 1 the 6th Coarse Wave Division Multiplexer (79,
80), 1 the 11st optical circulator (65,66), 1 the 12nd optical circulator (77,78), 1 the first demultiplexer (67,68),
1 semiconductor optical amplifier (69,70), 1 the first amplitude modulator (75,76), 1 first phase receiver RX2(71、
72), 1 the first amplitude receiver RX1(73、74).Under normal circumstances, the profile fiber (50,49), with the first photoswitch
(61,62) second port is connected, and the first photoswitch (61,62) first port is connected to the 5th Coarse Wave Division Multiplexer (63,64)
First port, first port connect first Fiber Bragg Grating FBG (92,93), the 5th Coarse Wave Division Multiplexer (63,64)
Second port is connected with the second port of the 11st circulator (65,66), the 3rd port of the 11st circulator (65,66) and the
The first port of one demultiplexer (67,68) is connected, and first port and the first diode light of the first demultiplexer (67,68) are put
Big device (69,70) is connected, the second port and first phase receiver RX of the first demultiplexer (67,68)2(71,72) it is connected,
3rd port of the first demultiplexer (67,68) and the first amplitude receiver RX1(73,74) it is connected, the first diode light amplification
Device (69,70) is connected with the first amplitude modulator (75,74), and amplitude modulator is connected to the tenth second ring device (77,78) first
Port, the tenth second ring device (77,78) second port are connected to the 6th Coarse Wave Division Multiplexer (79,80) second port, and the 12nd
Circulator (77,78) the 3rd port is connected to the 11st optical circulator (65,66) first port, the 6th Coarse Wave Division Multiplexer (79,
80) the 3rd port is connected with the 3rd port of the 5th Coarse Wave Division Multiplexer (63,64), the 6th Coarse Wave Division Multiplexer (79,80)
Single port is connected to the second photoswitch (81,82) first port, and the second photoswitch (81,82) the 3rd port is connected to optical-fiber network list
First (51,52), second port connect the second Fiber Bragg Grating FBG (89,90) through the 3rd attenuator (87,88).
Embodiment two：
Referring to Fig. 1, system shown in Figure 2, this realizes that passive optical network realizes that the method for Wavelength reuse and protection work(is：Just
Under norm formula, during downlink transfer, optical sender (1,2,3,4) while launch the red wave band that 4*N amplitude is loaded with downlink information
Light wave and 4*N amplitude are loaded with the blue wave band light wave of downlink information, by taking red wave band as an example, in lower point of the route of photoswitch (5,6)
Not Jin Ru the first coupler (9), light wave through attenuator (11,12) decay after enter the 3rd coupler (13), enter the first phase afterwards
Position modulator (15) load broadcast information, then light wave enter the first erbium-doped fiber amplifier (17), it is amplified to enter first
The first port of circulator (19), and enter the first single mode optical fiber (31) from the second port output of first annular device (19), connect
Light wave into the 3rd Coarse Wave Division Multiplexer (32) in distant-end node (2 '), after the 3rd Coarse Wave Division Multiplexer demultiplexing, the
A small group, the second group, the 3rd group, the 4th group's light wave respectively enter the first, second of the first spectral module (43),
3rd, the 4th port, the second group, the 3rd group, the 4th group export from the first port of the first spectral module (43), into the
The port 0 of an array waveguide optical grating (45), from the output port of the first array waveguide grating (45) via profile fiber (49) into
Enter the first optical network unit (51).Into after the first optical network unit (51), through the first optical splitter (58), in photoswitch (62)
Route under, into after the 5th Coarse Wave Division Multiplexer (64), red wave band light wave will be from the second port of Coarse Wave Division Multiplexer (64)
Output, then, light wave enter the second port of the 11st optical circulator (66), and from the 3rd port of the circulator, output enters solution
Multiplexer (68), from the light wave that the first port of the demultiplexer exports by first diode image intensifer (70) shaping, from this
The light wave of the second port output of demultiplexer is received by phase receivers (72), is exported from the 3rd port of the demultiplexer
Light wave is received by amplitude receiver (74).Light wave after diode image intensifer (70) shaping adds into amplitude modulator (76)
Uplink information is carried, into the first port of the tenth second ring device (78), is exported from the second port of the circulator, it is thick into the 6th
Exported after wavelength division multiplexer (80) from first port, profile fiber (91) is entered under the route of the second photoswitch (82), it is laggard
Enter the 4th photoswitch (81) of optical network unit (52), the 8th Coarse Wave Division Multiplexer (79) is entered under the route of photoswitch, from
The 3rd port output of 8th Coarse Wave Division Multiplexer (79), enters the 7th Coarse Wave Division Multiplexer (63) by the 4th optical splitter (83)
The 3rd port, from the output of the first port of the 7th Coarse Wave Division Multiplexer (63), into the 3rd photoswitch (61), in the 3rd light
Switch and enter the 3rd optical splitter (57) under the route of (61), enter first gust of distant-end node (2 ') by profile fiber (50)
Train wave guide grating (45), enters the tenth optical circulator (42) afterwards, the 4th thick ripple is entered under the route of the tenth optical circulator (42)
Division multiplexer (34), enters the second single mode optical fiber (32), through the second single mode optical fiber under the multiplexing of the 4th Coarse Wave Division Multiplexer (34)
(32) enter optical line terminal (1 '), enter the second thick ripple under the route of the second optical circulator (20) in optical line terminal (1 ')
Division multiplexer (22), is output and then enter array waveguide grating (26), finally from the 3rd port of the second Coarse Wave Division Multiplexer (22)
Light wave is received into receiver, obtains uplink information
Embodiment three：
Referring to Fig. 3,4, when single mode optical fiber (31) breaks down, detector (60) can not detect in optical network unit (51)
Downlink information, control photoswitch (62) get to the 3rd port, and the receiver (27,28) in optical line terminal will not receive letter
Number, they will control photoswitch (5,6) to get to the 3rd port, and red blue wave band enters coupling after photoswitch (5,6) gets to the 3rd port
Clutch (14) is coupled, and enters second phase modulator (16) load broadcast information afterwards, then light wave enters the second er-doped light
Fiber amplifier (18), the amplified first port for entering the second circulator (20), and from the second end of the second circulator (20)
Mouth output enters the second single mode optical fiber (32), and then light wave enters the 4th Coarse Wave Division Multiplexer (33) in distant-end node (2 '),
After the 4th Coarse Wave Division Multiplexer demultiplexing, the first group, the second group, the 3rd group, the 4th group's light wave respectively enter the
First, second, third, fourth port of two spectral modules (44), the second group, the 3rd group, the 4th group are divided from second
The first port output of module (44), into the port 0 of the first array waveguide grating (45), from the first array waveguide grating (45)
Output port enter the second optical network unit (52) via profile fiber (50).Into after the second optical network unit (52), wear
The 3rd optical splitter (57) is crossed, under the route of photoswitch (61), into after the 7th Coarse Wave Division Multiplexer (63), red wave band light wave will
Exported from the second port of Coarse Wave Division Multiplexer (63), then, through the 4th optical splitter (83), into the 8th Coarse Wave Division Multiplexer
(79), exported from the first port of the 8th Coarse Wave Division Multiplexer (79), into after the 3rd single mode optical fiber (91), subsequently enter light net
4th photoswitch (82) of network unit (51), enters the 6th Coarse Wave Division Multiplexer (80) under the route of photoswitch, thick from the 6th
Wavelength division multiplexer (80) second port output, light wave enter the 11st optical circulator (66) second port, light wave then into
Enter the 5th optical circulator, reflected in the route of the first photoswitch (62) into the first Fiber Bragg Grating FBG (93), in light
Under the route for switching (62), into after the 5th Coarse Wave Division Multiplexer (64), red wave band light wave will be from Coarse Wave Division Multiplexer (64)
Second port exports, and then, light wave enters the second port of the 11st optical circulator (66), defeated from the 3rd port of the circulator
Go out to enter demultiplexer (68), the light wave exported from the first port of the demultiplexer is whole by the first diode image intensifer (70)
Shape, the light wave exported from the second port of the demultiplexer is received by phase receivers (72), from the 3rd end of the demultiplexer
The light wave of mouth output is received by amplitude receiver (74).Light wave after diode image intensifer (70) shaping is modulated into amplitude
Device (76) loads uplink information, into the first port of the tenth second ring device (78), is exported from the second port of the circulator, into
Exported after entering the 6th Coarse Wave Division Multiplexer (80) from first port, profile fiber is entered under the route of the second photoswitch (82)
(91), the 8th coarse wavelength division multiplexing is entered under the route of photoswitch into the 4th photoswitch (81) of optical network unit (52) afterwards
Device (79), exports from the 3rd port of the 8th Coarse Wave Division Multiplexer (79), enters the 7th thick wavelength-division by the 4th optical splitter (83)
3rd port of multiplexer (63), from the output of the first port of the 7th Coarse Wave Division Multiplexer (63), into the 3rd photoswitch
(61), the 3rd optical splitter (57) is entered under the route of the 3rd photoswitch (61), enters distant-end node by profile fiber (50)
First array waveguide grating (45) of (2 '), enters the tenth optical circulator (42), under the route of the tenth optical circulator (42) afterwards
Into the 4th Coarse Wave Division Multiplexer (34), the second single mode optical fiber (32) is entered under the multiplexing of the 4th Coarse Wave Division Multiplexer (34), is passed through
Second single mode optical fiber (32) enters optical line terminal (1 '), in optical line terminal (1 ') under the route of the second optical circulator (20)
Into the second Coarse Wave Division Multiplexer (22), Waveguide array light is output and then enter from the 3rd port of the second Coarse Wave Division Multiplexer (22)
Grid (26), final light wave are received into receiver, obtain uplink information.
Claims (3)
- (1') 1. the system that a kind of passive optical network realizes Wavelength reuse and defencive function, passes through two by optical line terminal OLT (2') single mode optical fiber (31,32) connects 1 distant-end node RN, (2') distant-end node RN passes through the first and second two groups of profile fibers (49,50) connect two groups of optical network units (51,52) respectively, and two groups of optical network units (51,52) pass through third component cloth optical fiber (91) interconnect；It is characterized in that：1) optical line terminal OLT described in be (1') be connected respectively to first by two groups of common 8*N optical senders (1,2,3,4), The second two groups of common 8xN photoswitches (5,6,7,8), the first port of first group of photoswitch (5,6) are connected to the first coupler (9), which is connected to the 3rd coupler (13), the 3rd coupler (13) through first attenuator (11) Through first phase modulator (15), be connected to the first erbium-doped fiber amplifier (17), first erbium-doped fiber amplifier (17) with The first port connection of one first annular device (19), second port and the first single mode optical fiber (31) of the first annular device (19) It is connected, the 3rd port of the first annular device (19) is connected with the first port of a Coarse Wave Division Multiplexer I (21), the thick wavelength-division The second port of multiplexer I (21) is connected with the 5th coupler (25) first port, the 3rd end of Coarse Wave Division Multiplexer I (21) Mouthful it is connected with the 3rd erbium-doped fiber amplifier (23), the 3rd erbium-doped fiber amplifier (23) and the 5th coupler (25) the Two-port netwerk is connected；The second port of first group of photoswitch (5,6) is connected to the 4th coupler (14)；Second group of photoswitch (7,8) First port be connected to the 3rd coupler (13), the second port of second group of photoswitch (7,8) is connected to the second coupling Device (10), second coupler (10) are connected to the 4th coupler (14), the 4th coupler (14) through the second attenuator (12) Second phase modulator (16) is connected, which is connected to the second erbium-doped fiber amplifier (18), this Two erbium-doped fiber amplifiers (18) are connected with the first port of the second circulator (20), the second port of second circulator (20) It is connected with the second single mode optical fiber (32)；3rd port of second circulator (20) and the first end of Coarse Wave Division Multiplexer II (22) Mouth is connected, and the second port of the Coarse Wave Division Multiplexer II (22) is connected with the 3rd port of the 5th coupler (25), the thick ripple The 4th erbium-doped fiber amplifier (24) of the 3rd port of division multiplexer II (22) and the 4th end of the 5th coupler (25) Mouth is connected, and the 5th coupler (25) fifth port connects first array waveguide grating (26), the first Waveguide array light Grid (26) each delivery outlet is connected with two groups of common 8xN receivers (27,28,29,30) respectively, two single mode optical fibers (31, 32) respectively with the distant-end node RN (2') in Coarse Wave Division Multiplexer III (33) and Coarse Wave Division Multiplexer IV (34) be connected；2) (2') the distant-end node RN is：Described III (33) output terminal of coarse wavelength division multiplexing is respectively with the 3rd, the 4th, the 5th, The second port connection of six totally four circulators (35,36,37,38), the three, the four, the five, the 6th circulators (35,36,37, 38) the 3rd port is respectively connected to first, second, third, fourth port of the first spectral module (43), the described the 3rd, The first port of four, the five, the 6th circulators (35,36,37,38) is respectively connected to second, third, fourth, fifth array Waveguide optical grating (45,46,47,48)；Described coarse wavelength division multiplexing IV (34) output terminal respectively with the seven, the eight, the 9th, bull's eye The second port of shape device (39,40,41,42) is connected, the seven, the eight, the nine, the tenth circulator (39,40,41,42) 3rd port is respectively connected to first, second, third, fourth port of the second spectral module (44), described the seven, the 8th, The first port of nine, the tenth circulators (39,40,41,42) is respectively connected to second, third, fourth, fifth Waveguide array light Grid (45,46,47,48), the second, third, fourth, fifth array waveguide grating (45,46,47,48) are respectively connected with The first and second two groups of profile fibers (49,50)；3) the first and second two groups of profile fibers (49,50) are connected with optical network unit (51,52) respectively, two groups of light nets Network unit (51,52) is connected by third component cloth optical fiber (91), and each optical network unit (51,52) includes 1 optical splitter I (57,58), 1 optical splitter II (83,84), 1 detector I (59,60), 1 detector II (85,86), 1 photoswitch I (61,62), 1 photoswitch II (81,82), 1 Coarse Wave Division Multiplexer V (63,64), 1 Coarse Wave Division Multiplexer VI (79,80), 1 circulator Ⅺ (65,66), 1 circulator XII (77,78), 1 demultiplexer I (67,68), 1 diode image intensifer I (69,70), 1 amplitude modulator I (75,76), 1 phase receivers RX2I (71,72), 1 amplitude receiver RX1I (73, 74)；Under normal circumstances, the first and second two groups of profile fibers (50,49), respectively through optical splitter I (57,58) and photoswitch I (61,62) second port is connected, and the first port of photoswitch I (61,62) is connected to Coarse Wave Division Multiplexer V (63,64) First port, the 3rd port of photoswitch I (61,62) connect a Fiber Bragg Grating FBG I (92,93)；The thick ripple The second port of division multiplexer V (63,64) is connected with the second port of circulator Ⅹ (65,66), the circulator Ⅹ (65,66) The 3rd port be connected with the first port of demultiplexer I (67,68), the second port of demultiplexer I (67,68) and two poles Pipe image intensifer I (69,70) is connected, and the 3rd port of demultiplexer I (67) is connected with phase receivers RX2I (71,72), The 4th port of demultiplexer I (67,68) is connected with amplitude receiver RX1I (73,74), the diode image intensifer I (69,70) are connected with amplitude modulator I (75,76), and amplitude modulator I (75,76) is connected to circulator XII (77,78) Single port, circulator XII (77,78) second port are connected to Coarse Wave Division Multiplexer VI (79,80) second port, the circulator XII (77,78) the 3rd port is connected to the circulator Ⅺ (65,66) first port；The Coarse Wave Division Multiplexer VI (79,80) The 3rd port through optical splitter II (83,84) and the second detector (85,86) and the 5th Coarse Wave Division Multiplexer V (63,64) the Three ports are connected；Coarse Wave Division Multiplexer VI (the 79,80) first port is connected to photoswitch II (81,82) first port, should The 3rd port of photoswitch II (81,82) is connected to optical network unit (51,52), and the port of photoswitch II (81,82) is through declining Subtract device II (87,88) connection Fiber Bragg Grating FBG II (89,90).
- 2. a kind of passive optical network realizes Wavelength reuse and defencive function method, using new nothing according to claim 1 Source optical-fiber network realizes the system operatio of Wavelength reuse and defencive function, it is characterised in that：In the normal mode, during downlink transfer, Optical sender (1,2,3,4) while launch that 4*N amplitude is loaded with the red wave band light wave of downlink information and 4*N amplitude is loaded with down The blue wave band light wave of row information；The first coupler (9) is respectively enterd under the route of first group of photoswitch (5,6), light wave is through Enter the 3rd coupler (13) after one attenuator (11) decay, enter first phase modulator (15) load broadcast information afterwards, connect Light wave and enter the first erbium-doped fiber amplifier (17), the amplified first port for entering first annular device (19), and from the The second port output of one circulator (19) enters the first single mode optical fiber (31), during then (2') light wave enters distant-end node RN Coarse Wave Division Multiplexer III (33), after Coarse Wave Division Multiplexer III (33) demultiplexing, the first group, the second group, the 3rd group, the Four group's light waves enter the first spectral module through the three, the four, the five, the 6th 4 circulators (35,36,37,38) respectively (43) first, second, third, fourth port, second group, the 3rd group, the 4th group are from the first spectral module (43) first port output, into the port 0 of the second array waveguide optical grating (45), from the defeated of the second array waveguide optical grating (45) Exit port enters the first optical network unit (51) via first group of profile fiber (49), into after the first optical network unit (51), Through the first optical splitter I (58), under the route of the first photoswitch I (62), into after the first Coarse Wave Division Multiplexer V (64), light Ripple will be exported from the second port of the first Coarse Wave Division Multiplexer V (64), and then, light wave enters the first optical circulator Ⅺ (66) Second port, from the 3rd port of the circulator, output enters the first demultiplexer I (68), from first demultiplexer I (68) First port output light wave by first diode image intensifer (70) shaping；From the second of first demultiplexer I (68) The light wave of port output is received by phase receivers (72)；The light wave exported from the 3rd port of first demultiplexer I (68) Received by amplitude receiver (74)；Light wave after first diode image intensifer (70) shaping adds into amplitude modulator (76) Uplink information is carried, into the first port of first annular device XII (78), is exported from the second port of the first annular device XII, into Exported after entering the first Coarse Wave Division Multiplexer VI (80) from first port, the 3rd group is entered under the route of the first photoswitch II (82) Profile fiber (91), rear the second photoswitch II (81) for entering the second optical network unit (52), the second photoswitch II's (81) Route is lower to enter the second Coarse Wave Division Multiplexer VI (79), is exported from the 3rd port of second Coarse Wave Division Multiplexer VI (79), warp The 3rd port that the second optical splitter II (83) enters the second Coarse Wave Division Multiplexer V (63) is crossed, from the second Coarse Wave Division Multiplexer V (63) output of first port, into the second photoswitch I (61), enters second point under the route of the second photoswitch I (61) Light device I (57), enters the first array waveguide gratings (45) of distant-end node RN (2') by the second profile fiber (50), rear to enter Tenth optical circulator (42), enters Coarse Wave Division Multiplexer IV (34) under the route of the tenth optical circulator (42), the thick wavelength-division Enter the second single mode optical fiber (32) under the multiplexing of multiplexer IV (34), enter optical line terminal through second single mode optical fiber (32) OLT (1'), the optical line terminal OLT (1') in the second circulator (20) route under enter Coarse Wave Division Multiplexer II (22), Array waveguide grating (26) is output and then enter from the 3rd port of the Coarse Wave Division Multiplexer II (22), final light wave enters receiver Received, obtain uplink information.
- 3. a kind of passive optical network according to claim 2 realizes Wavelength reuse and defencive function method, it is characterised in that： When the first single mode optical fiber (31) breaks down, the second detector I (60) can not detect downlink in the first optical network unit (51) Information, the first photoswitch I (62) of control get to the 3rd port, and the receiver (27,28) in optical line terminal will not receive letter Number, they will control first group of photoswitch (5,6) to get to the 3rd port, and first group of photoswitch (5,6) is got to red behind the 3rd port Blue wave band is coupled into the 4th coupler (14), enters second phase modulator (16) load broadcast information afterwards, then light Ripple enters the second erbium-doped fiber amplifier (18), the amplified first port for entering the second circulator (20), and from the second ring The second port output of shape device (20) enters the second single mode optical fiber (32), the thick ripple during then (2') light wave enters distant-end node RN Division multiplexer IV (34) is the first group, the second group, the 3rd group, the 4th small after Coarse Wave Division Multiplexer IV (34) demultiplexing Group light wave respectively enters first, second, third, fourth port of the second spectral module (44), the second group, the 3rd group, the Four groups export from the first port of the second spectral module (44), into the port 0 of the second array waveguide optical grating (45), from second The output port of array waveguide grating (45) enters the second optical network unit (52) via second group of profile fiber (50)；Into After two optical network units (52), through the second optical splitter I (57), under the route of the second photoswitch I (61), into the second thick ripple After division multiplexer V (63), light wave will be exported from the second port of the second Coarse Wave Division Multiplexer V (63), then, through second point Light device II (83), into the second Coarse Wave Division Multiplexer VI (79), exports from the first port of the second Coarse Wave Division Multiplexer VI (79), Into after third component cloth optical fiber (91), the first photoswitch II (82) of the first optical network unit (51) is subsequently entered, first Enter the first Coarse Wave Division Multiplexer VI (80) under the route of photoswitch II (82), from the of first Coarse Wave Division Multiplexer VI (80) Two-port netwerk exports, and light wave enters the second port of first annular device Ⅺ (66), and light wave subsequently enters the first Coarse Wave Division Multiplexer V (64), reflected in the route of the first photoswitch I (62) into the first Fiber Bragg Grating FBG (93), in the first photoswitch I (62) under route, into after the first Coarse Wave Division Multiplexer V (64), light wave will be from first Coarse Wave Division Multiplexer V (64) Second port exports, and then, light wave enters the second port of first annular device Ⅺ (66), from the of the first annular device Ⅺ (60) The output of three ports enters the first demultiplexer I (68), from the light wave of the first port of first demultiplexer I (68) output by the One diode image intensifer (70) shaping, the light wave exported from the second port of first demultiplexer I (68) is by phase reception Machine (72) receives, and is received from the light wave that the 3rd port of first demultiplexer I (68) exports by amplitude receiver (74), through the Light wave after one diode image intensifer (70) shaping enters amplitude modulator (76) loading uplink information, into first annular device The first port of XII (78), exports from the second port of the first annular device XII (78), into the first Coarse Wave Division Multiplexer VI (80) exported after from first port, third component cloth optical fiber (91) is entered under the route of the first photoswitch II (82), it is rear to enter Second photoswitch II (81) of the second optical network unit (52), enters the second thick ripple under the route of second photoswitch II (81) Division multiplexer VI (79), exports from the 3rd port of second Coarse Wave Division Multiplexer VI (79), by the second optical splitter II (83) Into the 3rd port of the second wavelength division multiplexer V (63), from the output of the first port of the second Coarse Wave Division Multiplexer V (63), Into the second photoswitch I (61), the second optical splitter I (57) is entered under the route of the second photoswitch I (61), by the second component Cloth optical fiber (50) enters the second array waveguide optical gratings (45) of distant-end node RN (2'), enters the tenth circulator (42) afterwards, Enter Coarse Wave Division Multiplexer IV (34) under the route of ten circulators (42), second is entered under the multiplexing of Coarse Wave Division Multiplexer IV (34) (1') single mode optical fiber (32), enters optical line terminal OLT, the second ring in optical line terminal (1 ') through the second single mode optical fiber (32) Enter Coarse Wave Division Multiplexer II (22) under the route of shape device (20), output is laggard from the 3rd port of Coarse Wave Division Multiplexer II (22) Enter the first array waveguide grating (26), final light wave is received into receiver, obtains uplink information.
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| CN101741468A (en) * | 2009-12-17 | 2010-06-16 | 上海交通大学 | Wavelength division multiplexing passive optical network system supporting deflection routing multicast function |
| CN102202248A (en) * | 2011-06-15 | 2011-09-28 | 电子科技大学 | Orthogonal frequency division multiplexing passive optical network system |
| JP2012257160A (en) * | 2011-06-10 | 2012-12-27 | Sumitomo Electric Ind Ltd | Communication system |
| CN103595496A (en) * | 2013-11-08 | 2014-02-19 | 上海大学 | System and method for achieving online upgrading of single-star multi-ring wavelength division multiplexing passive optical network and achieving protection function |
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| CN101741468A (en) * | 2009-12-17 | 2010-06-16 | 上海交通大学 | Wavelength division multiplexing passive optical network system supporting deflection routing multicast function |
| JP2012257160A (en) * | 2011-06-10 | 2012-12-27 | Sumitomo Electric Ind Ltd | Communication system |
| CN102202248A (en) * | 2011-06-15 | 2011-09-28 | 电子科技大学 | Orthogonal frequency division multiplexing passive optical network system |
| CN103595496A (en) * | 2013-11-08 | 2014-02-19 | 上海大学 | System and method for achieving online upgrading of single-star multi-ring wavelength division multiplexing passive optical network and achieving protection function |
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