CN104486028A - System and method for realizing low-cost local area network service transmission for wavelength division multiplexing optical access network - Google Patents
System and method for realizing low-cost local area network service transmission for wavelength division multiplexing optical access network Download PDFInfo
- Publication number
- CN104486028A CN104486028A CN201410734095.XA CN201410734095A CN104486028A CN 104486028 A CN104486028 A CN 104486028A CN 201410734095 A CN201410734095 A CN 201410734095A CN 104486028 A CN104486028 A CN 104486028A
- Authority
- CN
- China
- Prior art keywords
- optical
- signal
- array waveguide
- waveguide grating
- grating awg
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Optical Communication System (AREA)
Abstract
The invention discloses a system and a method for realizing low-cost local area network service transmission for a wavelength division multiplexing optical access network. According to the system, an optical line terminal (OLT) is connected with a remote node RN through a feeder line optical fiber to form a tree-shaped network; the remote node RN is connected with an optical network unit ONU through a distributed optical fiber; the optical line terminal comprises N optical signal transmitters, N distributed feedback lasers DFB, N optical signal receivers, three 1*N array waveguide gratings AWG, a phase modulator PM, three optical circulators, a coarse wavelength division multiplexer, a waveband block WB, an optical isolator, N*N array waveguide gratings AWG and N optical network units ONU; each optical network unit ONU comprises two coarse wavelength division multiplexers, an optical circulator, an optical divider, three optical signal receivers, a reflective semiconductor optical amplifier RSOA, an electro absorption modulator EAM and a wideband light source BLS. Through the structural design of the RN end array waveguide gratings and the ONU end wideband light source, high-speed transmission of low-cost local area network service can be effectively realized in the wavelength division multiplexing optical access network (WDM-OAN).
Description
Technical field
The present invention relates to optical communication field, specifically relate to the system and method that a kind of wavelength division multiplexing optical access network realizes the transmission of low cost LAN service.
Background technology
Wave division multiplexing passive optical network WDM-PON technology can when not changing physical basis equipment upgrade bandwidth, significantly promote the transmission capacity of network, realize virtual point-to-point transmission, between each user, can not information be shared, there is natural fail safe.Intercommunication mutually between each optical network unit ONU, becomes at the WDM-PON of the communication load Wave division multiplexing passive optical network reducing optical line terminal (OLT) study hotspot realizing broadcast traffic transmissions.But existing optical line terminal (OLT) adopts the light source of laser as LAN service of specific wavelength, make the cost of the high speed transmission local domain network business realized between optical network unit ONU higher.
Summary of the invention
The object of the invention is to the defect existed for prior art, provide the system and method that a kind of wavelength division multiplexing optical access network (WDM-OAN) realizes the transmission of low cost LAN service, effectively can realize the high-speed transfer of low cost LAN service in wavelength division multiplexing optical access network (WDM-OAN).
For achieving the above object, core concept of the present invention is: in optical network unit ONU, place wideband light source BLS and electroabsorption modulator EAM, carries out modulating and send the local area network signal of wideband light source; N is adopted at distant-end node RN place
n array waveguide grating AWG is connected with optical isolator, by the frame mode of this new distant-end node RN, realizes frequency spectrum cutting and the transmission of local area network (LAN) broadband optical signal; Utilize N
the loop cycle Shifting Property of the wavelength of N array waveguide grating AWG, realizes LAN service in each optical network unit ONU, carries out virtual ring-type transmission.
According to foregoing invention design, the present invention adopts following scheme:
Wavelength division multiplexing optical access network realizes a system for low cost LAN service transmission, and connect a distant-end node RN by optical line terminal (OLT) by a feeder fiber, distant-end node RN is connected to N number of optical network unit ONU by profile fiber; It is characterized in that:
1), described optical line terminal (OLT) by N number of optical signal transmitter, N number of distributed feedback laser DFB, N number of optical signal receiver, one the 1
n array waveguide grating AWG, one the 21
n array waveguide grating AWG, one the 31
n array waveguide grating AWG, a phase-modulator PM, the first Optical circulator, a first Coarse Wave Division Multiplexer composition; In optical line terminal (OLT), N number of optical signal transmitter is connected to the 1
n array waveguide grating AWG, the one 1
the output of N array waveguide grating AWG is connected to the first Coarse Wave Division Multiplexer, and N number of distributed feedback laser DFB is connected to the 21
n array waveguide grating AWG, the 21
the output of N array waveguide grating AWG is connected to phase-modulator PM, and the output of phase-modulator PM is connected to the first Optical circulator, and N number of optical signal receiver is connected to the 31
n array waveguide grating AWG, the 31
the output of N array waveguide grating AWG is connected to the first Optical circulator, and the output of the first Optical circulator is connected to the first Coarse Wave Division Multiplexer, and the output of the first Coarse Wave Division Multiplexer is connected to distant-end node RN by a feeder fiber;
2), described distant-end node RN by, the second Optical circulator, the 3rd Optical circulator, wave band obstructing instrument WB, optical isolator, N
n array waveguide grating AWG forms, and wherein, a feeder fiber is connected to the second Optical circulator, and the output of the second Optical circulator is connected to the 3rd Optical circulator, and an output of the 3rd Optical circulator is connected to N
the input port 1 of N array waveguide grating AWG, the other end is connected to wave band obstructing instrument WB, and the output of wave band obstructing instrument WB is connected to the second Optical circulator, meanwhile, N
the input port of N array waveguide grating AWG
be connected to optical isolator, the output of optical isolator is connected to N
the input port of N array waveguide grating AWG
, N
n number of output of N array waveguide grating AWG is connected with N number of optical network unit ONU respectively by N root profile fiber;
3), described N number of optical network unit ONU is by second Coarse Wave Division Multiplexer be connected with profile fiber, and downstream signal reception machine, broadcast signal receiver, local area network signal receiver, optical branching device, reflective semiconductor optical amplifier RSOA, the 4th Optical circulator, the 3rd Coarse Wave Division Multiplexer, an electroabsorption modulator EAM and wideband light source BLS form, one tunnel of the second Coarse Wave Division Multiplexer exports and is divided into two-way to be connected to a broadcast signal receiver and a reflective semiconductor optical amplifier RSOA respectively by optical branching device, its another road exports and directly connects the 4th Optical circulator, the output of the 4th Optical circulator is connected to the 3rd Coarse Wave Division Multiplexer, one tunnel of the 3rd Coarse Wave Division Multiplexer exports and is connected to downstream signal reception machine, its another road exports by being connected to local area network signal receiver, the output of wideband light source BLS is connected to electroabsorption modulator EAM, the output of electroabsorption modulator EAM is connected to the 4th Optical circulator.
Wavelength division multiplexing optical access network realizes a method for low cost LAN service transmission, and the system adopting above-mentioned wavelength division multiplexing optical access network to realize the transmission of low cost transmission LAN service operates, and its transmission method is as follows:
One, for the transmission of broadcasting service, first N road light carrier is produced at the N number of distributed feedback laser DFB being arranged in optical line terminal (OLT)
, N road light carrier is by the 21 afterwards
n array waveguide grating AWG wavelength multiplexing, the signal after multiplexing is connected to the modulation that phase-modulator PM carries out broadcast singal, is loaded with the light signal of broadcast message
after multiplexing by the first Optical circulator, first Coarse Wave Division Multiplexer, transfer to distant-end node RN through feeder fiber;
In distant-end node RN, the broadcast singal in feeder fiber
successively by after the second Optical circulator and the 3rd Optical circulator, pass through N
after N array waveguide grating AWG wavelength (de) multiplexing, be loaded with the light signal of broadcast message
n number of optical network unit ONU is sent to by N root profile fiber;
Light signal in N number of optical network unit ONU
(
) by being divided into two parts by optical branching device after second Coarse Wave Division Multiplexer, wherein, a part sends into the reception that broadcast signal receiver is used for broadcasting service, and another part is sent into reflective semiconductor optical amplifier RSOA and modulated upward signal;
The transmission of the up-downgoing business two, in network, the N number of optical signal transmitter being arranged in optical line terminal (OLT) produces the light signal that N road is loaded with downlink information separately
, N road light signal is by one 1 afterwards
n array waveguide grating AWG wavelength multiplexing, multiplexing rear feeding first Coarse Wave Division Multiplexer delivers to distant-end node RN by feeder fiber;
In distant-end node RN, the downstream signal in feeder fiber
after the second Optical circulator and the 3rd Optical circulator, pass through N
after N array waveguide grating AWG wavelength (de) multiplexing, its N road exports and is connected to N root profile fiber, will be loaded with the light signal of downlink information
with the light signal being loaded with broadcast singal
(
) transfer to N number of optical network unit ONU together;
Light signal in N number of optical network unit ONU
(
) by after a second Coarse Wave Division Multiplexer wavelength (de) multiplexing, send into the 3rd Coarse Wave Division Multiplexer wavelength (de) multiplexing again by the 4th Optical circulator, the light signal being loaded with downlink information subsequently completes the reception of downstream signal by downstream signal reception machine,
And be loaded with the light signal of broadcast singal
be divided into two parts by optical branching device, wherein, a part sends into reflective semiconductor optical amplifier RSOA to the modulation of upward signal, and another part sends into the reception of broadcast signal receiver broadcasting service;
The light signal after upward signal modulation is carried out in reflective semiconductor optical amplifier RSOA
again return in distant-end node RN by optical branching device, the second Coarse Wave Division Multiplexer and profile fiber; In distant-end node RN, first pass through N
n array waveguide grating AWG wavelength multiplexing, upward signal subsequently
by returning to optical line terminal (OLT) by feeder fiber after the 3rd Optical circulator, wave band obstructing instrument WB, the second Optical circulator,
In optical line terminal (OLT), upward signal
through the first Coarse Wave Division Multiplexer and the first Optical circulator at one the 31
after N array waveguide grating AWG demultiplexing, N road upward signal
received by N number of optical signal receiver respectively;
Three., for the LAN service in network, the wideband light source BLS being arranged in N number of optical network unit ONU produces a wave-length coverage and exists
broadband light carrier wave, broadband light carrier wave carries out the modulation of local area network signal by electroabsorption modulator EAM afterwards, and the broadband optical signal being loaded with LAN Information subsequently returns in distant-end node RN by the 4th Optical circulator, the second Coarse Wave Division Multiplexer and profile fiber again; In distant-end node RN, first the broadband optical signal that N road is loaded with LAN Information passes through N
n array waveguide grating AWG carries out frequency spectrum cutting, subsequently through the light signal being loaded with each optical network unit ON LAN Information of frequency spectrum cutting
export N to
n number of input port of N array waveguide grating AWG, is wherein positioned at N
the local area network (LAN) light signal of N array waveguide grating AWG input port 1
by the 3rd Optical circulator at wave band obstructing instrument WB by filtering, be positioned at N
n array waveguide grating AWG input port
local area network (LAN) light signal
be cut off in optical isolator, be positioned at N
n array waveguide grating AWG input port
local area network (LAN) light signal
by sending into N after optical isolator
n array waveguide grating AWG input port
wavelength (de) multiplexing, the local area network signal after wavelength (de) multiplexing and the light signal being loaded with downlink information
with the light signal being loaded with broadcast singal
(
) transfer to N number of optical network unit ONU by N root profile fiber together; Local area network (LAN) light signal in N number of optical network unit ONU
(
) by after a second Coarse Wave Division Multiplexer wavelength (de) multiplexing, send into the 3rd Coarse Wave Division Multiplexer wavelength (de) multiplexing again by the 4th Optical circulator, the light signal being loaded with LAN Information subsequently completes the reception of local area network signal by local area network signal receiver.
Compared with prior art, the present invention has following apparent outstanding substantive distinguishing features and remarkable advantage:
By adopting wideband light source as the light source of LAN service in the N number of optical network unit ONU of the method, reduce the cost of LAN service; N simultaneously in distant-end node RN
n array waveguide grating AWG is while carrying out the cutting of wideband light source frequency spectrum, and its wavelength has loop cycle feature, can realize LAN service in each optical network unit ONU, carry out virtual ring-type transmission, and N
n array waveguide grating AWG input port local area network business carries out demultiplexing, and LAN service can be shared wave band with downlink business and can not produce at N number of optical network unit ONU end and disturb, and improves the wavelength utilance of whole network with this.
Accompanying drawing explanation
Fig. 1 is the system schematic that one embodiment of the invention wavelength division multiplexing optical access network realizes the transmission of low cost LAN service.
Fig. 2 is the schematic diagram that wavelength division multiplexing optical access network medium wavelength distributes.
Embodiment
Details are as follows by reference to the accompanying drawings for the preferred embodiments of the present invention:
Embodiment one: see Fig. 1, this wavelength division multiplexing optical access network realizes the system of low cost LAN service transmission, connect a distant-end node RN (30) by optical line terminal (OLT) (10) by a feeder fiber (20), distant-end node RN (30) is connected to N number of optical network unit ONU (50) by profile fiber (40).
See Fig. 1, described optical line terminal (OLT) (10) be by N number of optical signal transmitter (11), N number of distributed feedback laser DFB (12), N number of optical signal receiver (13), one the 1
n array waveguide grating AWG (14), one the 21
n array waveguide grating AWG (15), one the 31
n array waveguide grating AWG (16), a phase-modulator PM (17), first Optical circulator (18), the first Coarse Wave Division Multiplexer (19) composition, in optical line terminal (OLT) (10), N number of optical signal transmitter (11) is connected to the 1
n array waveguide grating AWG (14) the 1
the output of N array waveguide grating AWG (14) is connected to the first Coarse Wave Division Multiplexer (19), and N number of distributed feedback laser DFB (12) is connected to the 21
n array waveguide grating AWG (15), the 21
the output of N array waveguide grating AWG (15) is connected to phase-modulator PM (17), the output of phase-modulator PM (17) is connected to the first Optical circulator (18), and N number of optical signal receiver (13) is connected to the 31
n array waveguide grating AWG (16), the 31
the output of N array waveguide grating AWG (16) is connected to the first Optical circulator (18), the output of the first Optical circulator (18) is connected to the first Coarse Wave Division Multiplexer (19), and the output of the first Coarse Wave Division Multiplexer (19) is connected to distant-end node RN (30) by a feeder fiber (20);
See Fig. 1, described distant-end node RN (30) is by the second Optical circulator (31), the 3rd Optical circulator (32), wave band obstructing instrument WB (33), optical isolator (34), N
n array waveguide grating AWG (35) forms, wherein, a described feeder fiber (20) is connected to the second Optical circulator (31), the output of the second Optical circulator (31) is connected to the 3rd Optical circulator (32), and an output of the 3rd Optical circulator (32) is connected to N
the input port 1 of N array waveguide grating AWG (35), the other end is connected to wave band obstructing instrument WB (33), and the output of wave band obstructing instrument WB (33) is connected to the second Optical circulator (31), N
the input port of N array waveguide grating AWG (35)
be connected to optical isolator (34), the output of optical isolator (34) is connected to N
the input port of N array waveguide grating AWG (35)
, N
n number of output of N array waveguide grating AWG (35) is connected with N number of optical network unit ONU (50) respectively by N root profile fiber (40);
See Fig. 1, described N number of optical network unit ONU (50) is by second Coarse Wave Division Multiplexer (51) be connected with profile fiber (40), a downstream signal reception machine (52), a broadcast signal receiver (53), a local area network signal receiver (54), an optical branching device (55), a reflective semiconductor optical amplifier RSOA (56), 4th Optical circulator (57), 3rd Coarse Wave Division Multiplexer (58), an electroabsorption modulator EAM (59) and wideband light source BLS (60) composition, one tunnel of the second Coarse Wave Division Multiplexer (51) exports and is divided into two-way to be connected to a broadcast signal receiver (53) and a reflective semiconductor optical amplifier RSOA (56) respectively by optical branching device (55), its another road exports and directly connects the 4th Optical circulator (57), the output of the 4th Optical circulator (57) is connected to the 3rd Coarse Wave Division Multiplexer (58), one tunnel of the 3rd Coarse Wave Division Multiplexer (58) exports and is connected to downstream signal reception machine (52), its another road exports by being connected to local area network signal receiver (54), the output of wideband light source BLS (60) is connected to electroabsorption modulator EAM (59), the output of electroabsorption modulator EAM (59) is connected to the 4th Optical circulator (57).
Embodiment two:
See Fig. 1, system shown in Figure 2, realizing the system concrete grammar that system wavelength division multiplexing optical access network realizes the transmission of low cost LAN service is: adopt said system to carry out the transmission of broadcasting service, first
N road light carrier is produced the N number of distributed feedback laser DFB (12) being arranged in optical line terminal (OLT) (10)
, N road light carrier is by the 21 afterwards
n array waveguide grating AWG (15) wavelength multiplexing, the signal after multiplexing is connected to the modulation that phase-modulator PM (17) carries out broadcast singal, is loaded with the light signal of broadcast message
after multiplexing by the first Optical circulator (18), first Coarse Wave Division Multiplexer (19), transfer to distant-end node RN (30) through feeder fiber (20);
In distant-end node RN (30), the broadcast singal in feeder fiber (20)
successively by after the second Optical circulator (31) and the 3rd Optical circulator (32), pass through N
after N array waveguide grating AWG (35) wavelength (de) multiplexing, be loaded with the light signal of broadcast message
n number of optical network unit ONU (50) is sent to by N root profile fiber (40);
Light signal in N number of optical network unit ONU (50)
(
) by being divided into two parts by optical branching device (55) after second Coarse Wave Division Multiplexer (51), wherein, a part sends into the reception of broadcast signal receiver (53) for broadcasting service, and another part sends into reflective semiconductor optical amplifier RSOA (56);
Upward signal is modulated; The transmission of the up-downgoing business in network, the N number of optical signal transmitter (11) being arranged in optical line terminal (OLT) (10) produces the light signal that N road is loaded with downlink information separately
, N road light signal is by one 1 afterwards
n array waveguide grating AWG (14) wavelength multiplexing, multiplexing rear feeding first Coarse Wave Division Multiplexer (19) delivers to distant-end node RN (30) by feeder fiber (20);
In distant-end node RN (30), the downstream signal in feeder fiber (20)
after the second Optical circulator (31) and the 3rd Optical circulator (32), pass through N
after N array waveguide grating AWG (35) wavelength (de) multiplexing, its N road exports and is connected to N root profile fiber (40), will be loaded with the light signal of downlink information
with the light signal being loaded with broadcast singal
(
) transfer to N number of optical network unit ONU (50) together;
Light signal in N number of optical network unit ONU (50)
(
) by after the second Coarse Wave Division Multiplexer (51) wavelength (de) multiplexing, the 3rd Coarse Wave Division Multiplexer (58) wavelength (de) multiplexing is again sent into by the 4th Optical circulator (57), the light signal being loaded with downlink information subsequently completes the reception of downstream signal by downstream signal reception machine (52), and is loaded with the light signal of broadcast singal
two parts are divided into by optical branching device (55), wherein, a part sends into reflective semiconductor optical amplifier RSOA (56) to the modulation of upward signal, and another part sends into the reception of broadcast signal receiver (53) broadcasting service; Light signal carry out upward signal modulation in reflective semiconductor optical amplifier RSOA (56) after
again return in distant-end node RN (30) by optical branching device (55), the second Coarse Wave Division Multiplexer (51) and profile fiber (40); In distant-end node RN (30), first pass through N
n array waveguide grating AWG (35) wavelength multiplexing, upward signal subsequently
returned to optical line terminal (OLT) (10) by feeder fiber (20) afterwards by the 3rd Optical circulator (32), wave band obstructing instrument WB (33), the second Optical circulator (31),
In optical line terminal (OLT) (10), upward signal
through the first Coarse Wave Division Multiplexer (19) and the first Optical circulator (18) at one the 31
after N array waveguide grating AWG (16) demultiplexing, N road upward signal
received by N number of optical signal receiver (13) respectively;
For the LAN service in network, the wideband light source BLS (60) being arranged in N number of optical network unit ONU (50) produces a wave-length coverage and exists
broadband light carrier wave, broadband light carrier wave carries out the modulation of local area network signal by electroabsorption modulator EAM (59) afterwards, and the broadband optical signal being loaded with LAN Information subsequently returns in distant-end node RN (30) by the 4th Optical circulator (57), the second Coarse Wave Division Multiplexer (51) and profile fiber (40) again; In distant-end node RN (30), first the broadband optical signal that N road is loaded with LAN Information passes through N
n array waveguide grating AWG (35) carries out frequency spectrum cutting, subsequently through the light signal being loaded with each optical network unit ONU (50) LAN Information of frequency spectrum cutting
export N to
n number of input port of N array waveguide grating AWG (35), is wherein positioned at N
the local area network (LAN) light signal of N array waveguide grating AWG (35) input port 1
by the 3rd Optical circulator (32) at wave band obstructing instrument WB (33) by filtering, be positioned at N
n array waveguide grating AWG (35) input port
local area network (LAN) light signal
be cut off in optical isolator (34), be positioned at N
n array waveguide grating AWG (35) input port
local area network (LAN) light signal
n is sent into afterwards by optical isolator (34)
n array waveguide grating AWG (35) input port
wavelength (de) multiplexing, the local area network signal after wavelength (de) multiplexing and the light signal being loaded with downlink information
with the light signal being loaded with broadcast singal
(
) transfer to N number of optical network unit ONU (50) by N root profile fiber (40) together; Local area network (LAN) light signal in N number of optical network unit ONU (50)
(
) by after the second Coarse Wave Division Multiplexer (51) wavelength (de) multiplexing, send into the 3rd Coarse Wave Division Multiplexer (58) wavelength (de) multiplexing again by the 4th Optical circulator (57), the light signal being loaded with LAN Information subsequently completes the reception of local area network signal by local area network signal receiver (54).
Claims (2)
1. a wavelength division multiplexing optical access network realizes the system of low cost LAN service transmission, a distant-end node RN (30) is connected by a feeder fiber (20) by optical line terminal (OLT) (10), distant-end node RN (30) is connected to N number of optical network unit ONU (50) by profile fiber (40), it is characterized in that:
1). described optical line terminal (OLT) (10) be by N number of optical signal transmitter (11), N number of distributed feedback laser DFB (12), N number of optical signal receiver (13), one the 1
n array waveguide grating AWG (14), one the 21
n array waveguide grating AWG (15), one the 31
n array waveguide grating AWG (16), a phase-modulator PM (17), first Optical circulator (18), the first Coarse Wave Division Multiplexer (19) composition, in optical line terminal (OLT) (10), N number of optical signal transmitter (11) is connected to the 1
n array waveguide grating AWG (14) the 1
the output of N array waveguide grating AWG (14) is connected to the first Coarse Wave Division Multiplexer (19), and N number of distributed feedback laser DFB (12) is connected to the 21
n array waveguide grating AWG (15), the 21
the output of N array waveguide grating AWG (15) is connected to phase-modulator PM (17), the output of phase-modulator PM (17) is connected to the first Optical circulator (18), and N number of optical signal receiver (13) is connected to the 31
n array waveguide grating AWG (16), the 31
the output of N array waveguide grating AWG (16) is connected to the first Optical circulator (18), the output of the first Optical circulator (18) is connected to the first Coarse Wave Division Multiplexer (19), and the output of the first Coarse Wave Division Multiplexer (19) is connected to distant-end node RN (30) by a feeder fiber (20);
2)
.described distant-end node RN (30) by the second Optical circulator (31), the 3rd Optical circulator (32), wave band obstructing instrument WB (33), optical isolator (34), N
n array waveguide grating AWG (35) forms, wherein, a described feeder fiber (20) is connected to the second Optical circulator (31), the output of the second Optical circulator (31) is connected to the 3rd Optical circulator (32), and an output of the 3rd Optical circulator (32) is connected to N
the input port 1 of N array waveguide grating AWG (35), the other end is connected to wave band obstructing instrument WB (33), and the output of wave band obstructing instrument WB (33) is connected to the second Optical circulator (31), N
the input port of N array waveguide grating AWG (35)
be connected to optical isolator (34), the output of optical isolator (34) is connected to N
the input port of N array waveguide grating AWG (35)
, N
n number of output of N array waveguide grating AWG (35) is connected with N number of optical network unit ONU (50) respectively by N root profile fiber (40);
3). described N number of optical network unit ONU (50) is by second Coarse Wave Division Multiplexer (51) be connected with profile fiber (40), a downstream signal reception machine (52), a broadcast signal receiver (53), a local area network signal receiver (54), an optical branching device (55), a reflective semiconductor optical amplifier RSOA (56), 4th Optical circulator (57), 3rd Coarse Wave Division Multiplexer (58), an electroabsorption modulator EAM (59) and wideband light source BLS (60) composition, one tunnel of the second Coarse Wave Division Multiplexer (51) exports and is divided into two-way to be connected to a broadcast signal receiver (53) and a reflective semiconductor optical amplifier RSOA (56) respectively by optical branching device (55), its another road exports and directly connects the 4th Optical circulator (57), the output of the 4th Optical circulator (57) is connected to the 3rd Coarse Wave Division Multiplexer (58), one tunnel of the 3rd Coarse Wave Division Multiplexer (58) exports and is connected to downstream signal reception machine (52), its another road exports by being connected to local area network signal receiver (54), the output of wideband light source BLS (60) is connected to electroabsorption modulator EAM (59), the output of electroabsorption modulator EAM (59) is connected to the 4th Optical circulator (57).
2. wavelength division multiplexing optical access network realizes a method for low cost LAN service transmission, and the system adopting wavelength division multiplexing optical access network according to claim 1 to realize the transmission of low cost LAN service carries out the transmission of broadcasting service, it is characterized in that,
One. produce N road light carrier the N number of distributed feedback laser DFB (12) being arranged in optical line terminal (OLT) (10)
, N road light carrier is by the 21 afterwards
n array waveguide grating AWG (15) wavelength multiplexing, the signal after multiplexing is connected to the modulation that phase-modulator PM (17) carries out broadcast singal, is loaded with the light signal of broadcast message
after multiplexing by the first Optical circulator (18), first Coarse Wave Division Multiplexer (19), transfer to distant-end node RN (30) through feeder fiber (20);
In distant-end node RN (30), the broadcast singal in feeder fiber (20)
successively by after the second Optical circulator (31) and the 3rd Optical circulator (32), pass through N
after N array waveguide grating AWG (35) wavelength (de) multiplexing, be loaded with the light signal of broadcast message
n number of optical network unit ONU (50) is sent to by N root profile fiber (40);
Light signal in N number of optical network unit ONU (50)
(
) by being divided into two parts by optical branching device (55) after second Coarse Wave Division Multiplexer (51), wherein, a part sends into the reception of broadcast signal receiver (53) for broadcasting service, and another part sends into reflective semiconductor optical amplifier RSOA (56);
Two. to upward signal modulation, the transmission of the up-downgoing business in network, the N number of optical signal transmitter (11) being arranged in optical line terminal (OLT) (10) produces the light signal that N road is loaded with downlink information separately
, N road light signal is by one 1 afterwards
n array waveguide grating AWG (14) wavelength multiplexing, multiplexing rear feeding first Coarse Wave Division Multiplexer (19) delivers to distant-end node RN (30) by feeder fiber (20);
In distant-end node RN (30), the downstream signal in feeder fiber (20)
after the second Optical circulator (31) and the 3rd Optical circulator (32), pass through N
after N array waveguide grating AWG (35) wavelength (de) multiplexing, its N road exports and is connected to N root profile fiber (40), will be loaded with the light signal of downlink information
with the light signal being loaded with broadcast singal
(
) transfer to N number of optical network unit ONU (50) together;
Light signal in N number of optical network unit ONU (50)
(
) by after the second Coarse Wave Division Multiplexer (51) wavelength (de) multiplexing, the 3rd Coarse Wave Division Multiplexer (58) wavelength (de) multiplexing is again sent into by the 4th Optical circulator (57), the light signal being loaded with downlink information subsequently completes the reception of downstream signal by downstream signal reception machine (52), and is loaded with the light signal of broadcast singal
two parts are divided into by optical branching device (55), wherein, a part sends into reflective semiconductor optical amplifier RSOA (56) to the modulation of upward signal, and another part sends into the reception of broadcast signal receiver (53) broadcasting service; Light signal carry out upward signal modulation in reflective semiconductor optical amplifier RSOA (56) after
again return in distant-end node RN (30) by optical branching device (55), the second Coarse Wave Division Multiplexer (51) and profile fiber (40); In distant-end node RN (30), first pass through N
n array waveguide grating AWG (35) wavelength multiplexing, upward signal subsequently
returned to optical line terminal (OLT) (10) by feeder fiber (20) afterwards by the 3rd Optical circulator (32), wave band obstructing instrument WB (33), the second Optical circulator (31);
In optical line terminal (OLT) (10), upward signal
through the first Coarse Wave Division Multiplexer (19) and the first Optical circulator (18) at one the 31
after N array waveguide grating AWG (16) demultiplexing, N road upward signal
received by N number of optical signal receiver (13) respectively;
Three. for the LAN service in network, the wideband light source BLS (60) being arranged in N number of optical network unit ONU (50) produces a wave-length coverage and exists
broadband light carrier wave, broadband light carrier wave carries out the modulation of local area network signal by electroabsorption modulator EAM (59) afterwards, and the broadband optical signal being loaded with LAN Information subsequently returns in distant-end node RN (30) by the 4th Optical circulator (57), the second Coarse Wave Division Multiplexer (51) and profile fiber (40) again; In distant-end node RN (30), first the broadband optical signal that N road is loaded with LAN Information passes through N
n array waveguide grating AWG (35) carries out frequency spectrum cutting, subsequently through the light signal being loaded with each optical network unit ONU (50) LAN Information of frequency spectrum cutting
export N to
n number of input port of N array waveguide grating AWG (35), is wherein positioned at N
the local area network (LAN) light signal of N array waveguide grating AWG (35) input port 1
by the 3rd Optical circulator (32) at wave band obstructing instrument WB (33) by filtering, be positioned at N
n array waveguide grating AWG (35) input port
local area network (LAN) light signal
be cut off in optical isolator (34), be positioned at N
n array waveguide grating AWG (35) input port
local area network (LAN) light signal
n is sent into afterwards by optical isolator (34)
n array waveguide grating AWG (35) input port
wavelength (de) multiplexing, the local area network signal after wavelength (de) multiplexing and the light signal being loaded with downlink information
with the light signal being loaded with broadcast singal
(
) transfer to N number of optical network unit ONU (50) by N root profile fiber (40) together; Local area network (LAN) light signal in N number of optical network unit ONU (50)
(
) by after the second Coarse Wave Division Multiplexer (51) wavelength (de) multiplexing, send into the 3rd Coarse Wave Division Multiplexer (58) wavelength (de) multiplexing again by the 4th Optical circulator (57), the light signal being loaded with LAN Information subsequently completes the reception of local area network signal by local area network signal receiver (54).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410734095.XA CN104486028B (en) | 2014-12-08 | 2014-12-08 | The system and method for wavelength-division multiplex soft exchange net low cost LAN service transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410734095.XA CN104486028B (en) | 2014-12-08 | 2014-12-08 | The system and method for wavelength-division multiplex soft exchange net low cost LAN service transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104486028A true CN104486028A (en) | 2015-04-01 |
| CN104486028B CN104486028B (en) | 2018-05-01 |
Family
ID=52760542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410734095.XA Expired - Fee Related CN104486028B (en) | 2014-12-08 | 2014-12-08 | The system and method for wavelength-division multiplex soft exchange net low cost LAN service transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104486028B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107947893A (en) * | 2017-12-13 | 2018-04-20 | 武汉邮电科学研究院 | WDM PON systems based on remote node and seed light source |
| WO2018214004A1 (en) * | 2017-05-22 | 2018-11-29 | 华为技术有限公司 | Data transmission method and apparatus |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101729942A (en) * | 2009-11-26 | 2010-06-09 | 上海大学 | System and method for using wavelength division multiplex passive optical network to realize ring local area network |
| CN101835070A (en) * | 2010-05-06 | 2010-09-15 | 上海大学 | System and method for realizing wavelength reusing and broadcasting functions of wavelength division multiplexing passive optical network |
| CN101998189A (en) * | 2009-08-20 | 2011-03-30 | 中兴通讯股份有限公司 | Method for managing optical access node and optical access node |
| CN102075282A (en) * | 2011-02-24 | 2011-05-25 | 上海大学 | System and method for realizing dynamic wavelength scheduling and protection functions in wavelength division multiplexing passive optical network |
-
2014
- 2014-12-08 CN CN201410734095.XA patent/CN104486028B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101998189A (en) * | 2009-08-20 | 2011-03-30 | 中兴通讯股份有限公司 | Method for managing optical access node and optical access node |
| CN101729942A (en) * | 2009-11-26 | 2010-06-09 | 上海大学 | System and method for using wavelength division multiplex passive optical network to realize ring local area network |
| CN101835070A (en) * | 2010-05-06 | 2010-09-15 | 上海大学 | System and method for realizing wavelength reusing and broadcasting functions of wavelength division multiplexing passive optical network |
| CN102075282A (en) * | 2011-02-24 | 2011-05-25 | 上海大学 | System and method for realizing dynamic wavelength scheduling and protection functions in wavelength division multiplexing passive optical network |
Non-Patent Citations (3)
| Title |
|---|
| 傅珂,张锐,钱渊: "WDM-PON网络的ONU光源技术", 《光器件》 * |
| 原荣: "WDM-PON接入技术及其最新进展", 《中国新通信》 * |
| 杨登峰，甘朝钦，朱龙: "无源光接入网中反射式ONU的研究", 《光通信研究》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018214004A1 (en) * | 2017-05-22 | 2018-11-29 | 华为技术有限公司 | Data transmission method and apparatus |
| CN109287138A (en) * | 2017-05-22 | 2019-01-29 | 华为技术有限公司 | Data transmission method and device |
| CN109287138B (en) * | 2017-05-22 | 2020-03-10 | 华为技术有限公司 | Data transmission method and device |
| CN107947893A (en) * | 2017-12-13 | 2018-04-20 | 武汉邮电科学研究院 | WDM PON systems based on remote node and seed light source |
| CN107947893B (en) * | 2017-12-13 | 2019-05-28 | 武汉邮电科学研究院 | WDM-PON system based on remote node and seed light source |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104486028B (en) | 2018-05-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102710361B (en) | A kind of distributed base station signal transmission system and communication system | |
| Grobe et al. | PON in adolescence: from TDMA to WDM-PON | |
| US9124368B2 (en) | Transceiver for use in fibre network | |
| CN102724012B (en) | Light-source-shared WDM-PON (wavelength division multiplexed passive optical network) system based on suppressed carrier modulation technique | |
| JP6907409B2 (en) | Calibration equipment and methods, and wavelength division multiplexing systems | |
| CN101702785B (en) | Multi-wavelength passive optical network system, wavelength reusing method and optical network unit | |
| TWI513207B (en) | A remote node device, an optical network unit, a system and a communication method thereof | |
| CN103248427A (en) | RoF-PON hybrid access system | |
| CN102882608A (en) | Chaotic quadrature multiplexing secure optical fiber communication device and method | |
| CN102088329B (en) | System and method for realizing broadcasting service transmission for wavelength division multiplex passive optical network | |
| CN205081795U (en) | Wavelength devision multiplex passive optical network system based on subcarrier is multiplexing | |
| CN101351055B (en) | WDM passive optical network system capable of supporting quadruple service conveying function | |
| CN102158772B (en) | System and method for being compatible to broadcasting service in colorless wavelength division multiplexing passive optical network | |
| CN101056155B (en) | Optical source concentrated wave division multiplexing passive optical network for simultaneously generating the DPSK and OOK signals | |
| CN103001911B (en) | From relevant detection orthogonal frequency division multiplexing passive optical network system and transmission method | |
| WO2015087681A1 (en) | Wavelength-multiplexed transport system | |
| CN103067089B (en) | ROF and WDM-PON emerging system and method for transmitting signals thereof | |
| CN105049124B (en) | Double hairs suitable for DDO-OFDM are the same as collecting/transmitting system and its transmitting terminal | |
| CN101835070B (en) | System and method for realizing wavelength reusing and broadcasting functions of wavelength division multiplexing passive optical network | |
| CN204481832U (en) | A kind of based on light comb and the ROF-PON full duplex system of carrier reuse | |
| CN104486028A (en) | System and method for realizing low-cost local area network service transmission for wavelength division multiplexing optical access network | |
| CN102710576B (en) | The colourless OFDM WDM passive optical network system of relevant detection and transmission method | |
| US11038614B2 (en) | Optical system including a reconfigurable optical add/drop multiplexer and filters | |
| CN102868443A (en) | Orthogonal frequency division multiplexing passive optical network self-healing function realization system and transmission method | |
| CN102769807B (en) | Centralization light source orthogonal frequency division multiplexing passive optical network system and transmission method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180501 Termination date: 20201208 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |