CN103281605A - Multi-wavelength passive optical network system - Google Patents
Multi-wavelength passive optical network system Download PDFInfo
- Publication number
- CN103281605A CN103281605A CN201310242631XA CN201310242631A CN103281605A CN 103281605 A CN103281605 A CN 103281605A CN 201310242631X A CN201310242631X A CN 201310242631XA CN 201310242631 A CN201310242631 A CN 201310242631A CN 103281605 A CN103281605 A CN 103281605A
- Authority
- CN
- China
- Prior art keywords
- wavelength
- optical
- optical network
- network unit
- group
- 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.)
- Pending
Links
Images
Landscapes
- Optical Communication System (AREA)
Abstract
The invention provides a multi-wavelength passive optical network system. The multi-wavelength passive optical network system comprises an optical line terminal, an optical distribution network and a plurality of optical network units, wherein the optical line terminal is connected to the optical network units in the mode that one point is connected to multiple points through the optical distribution network. According to the multi-wavelength passive optical network system, the optical network units are divided into a plurality of groups, each group of the optical network units adopts a specific uplink wavelength and a specific downlink wavelength, the optical distribution network comprises a first-level optical splitter and a plurality of second-level optical splitters, the public port of the first-level optical splitter is connected to the optical line terminal through a main optical fiber, the branch ports of the first-level optical splitter are connected with branch optical fibers respectively and are connected to one group of optical network units through one of the second optical splitters, the branch optical fibers which are connected with the branch ports of the first-level optical splitter are respectively connected with a wavelength reflector in series, the public port of the first-level optical splitter is connected with an optical absorber, and the different wavelength reflectors have different transmission wavelengths and different reflection wavelengths.
Description
Technical field
The present invention relates to a kind of smooth access technology, especially, relate to a kind of multi-wavelength passive optical network (Passive Optical Network, PON) system.
Background technology
Along with the continuous growth of user to bandwidth demand, traditional copper cash broadband access system more and more faces bandwidth bottleneck.Meanwhile, the increasingly mature and application cost of the Fibre Optical Communication Technology that bandwidth capacity is huge descends year by year, and the light access technology such as EPON, becomes the strong competitor of broadband access network of future generation gradually.
Traditional passive optical network, such as gigabit passive optical network (Gigabit-capable Passive Optical Network, GPON) system or Ethernet passive optical network (Ethernet Passive Optical Network, EPON) system, the general point that adopts is to multiple spot (Point to multiple point, P2MP) the network architecture, be optical line terminal (the Optical Line Terminal of central office, OLT) by Optical Distribution Network (Optical Distribution Network, ODN) with the point to the mode of multiple spot be connected to user's side a plurality of optical network units (Optical Network Unit, ONU).Wherein, at down direction, the downstream wavelength that optical line terminal adopts appointment with time division multiplexing (Time Division Multiplexing, TDM) mode is given optical network unit with downlink data transmission, each optical network unit only receives the downlink data that carries its device identification; And at up direction, optical network unit adopts the up wavelength of appointment with time division multiple access (Time Division Multiple Access, TDMA) mode is given optical line terminal with transmitting uplink data, and each optical network unit only carries out data at the time slot (Time Slot) of optical line terminal mandate and sends out.
In the multiple spot passive optical network, because optical network unit adopts time-multiplexed mode to share optical transmission medium, under the network architecture of big branching ratio, the time of time division multiplexing mode is cut apart the bandwidth that characteristic has a strong impact on optical network unit at above-mentioned traditional point.Therefore, along with the development of broadband services, traditional passive optical network can't satisfy the user to the ever-increasing demand of bandwidth.
Summary of the invention
For solving the bandwidth problem that prior art exists, the invention provides a kind of multi-wavelength passive optical network system.
Multi-wavelength passive optical network system provided by the invention comprises optical line terminal, Optical Distribution Network and a plurality of optical network unit, and described optical line terminal is connected to described optical network unit by described Optical Distribution Network in the mode of putting multiple spot; Wherein, described a plurality of optical network unit is divided into many groups, each group optical network unit adopts different up-downgoing wavelength respectively, described Optical Distribution Network comprises first order optical splitter and a plurality of second level optical splitter, the public port of wherein said first order optical splitter is connected to described optical line terminal by trunk optical fiber, and its branch port connects branch optical fiber respectively and is connected to one group of optical network unit by one of them second level optical splitter, the branch optical fiber that the branch port of described first order optical splitter connects is serially connected with the wavelength reflector respectively, the public port of described first order optical splitter is connected with light absorber, and different wavelength reflectors has different transmission peak wavelengths and reflection wavelength respectively.
In multi-wavelength passive optical network system one preferred embodiment provided by the invention, described a plurality of optical network unit is divided into four groups, and described first order optical splitter comprises four branch port, each branch port corresponds respectively to wherein one group of optical network unit, and the branch optical fiber that described four branch port connect is serially connected with the first wavelength reflector, the second wavelength reflector, three-wavelength reflector and the 4th wavelength reflector respectively.
In multi-wavelength passive optical network system one preferred embodiment provided by the invention, the transmission peak wavelength of the described first wavelength reflector is the downstream wavelength of first group of optical network unit, and its reflection wavelength is the downstream wavelength of its excess-three group optical network unit; The transmission peak wavelength of the described second wavelength reflector is the downstream wavelength of second group of optical network unit, and its reflection wavelength is the downstream wavelength of its excess-three group optical network unit; The transmission peak wavelength of described three-wavelength reflector is the downstream wavelength of the 3rd group of optical network unit, and its reflection wavelength is the downstream wavelength of its excess-three group optical network unit; The transmission peak wavelength of described the 4th wavelength reflector is the downstream wavelength of the 4th group of optical network unit, and its reflection wavelength is the downstream wavelength of its excess-three group optical network unit.
In multi-wavelength passive optical network system one preferred embodiment provided by the invention, described Optical Distribution Network also comprises the upgoing wave division multiplexer, the public port of described upgoing wave division multiplexer is coupled to trunk optical fiber by the trunk coupler, and the branch port of described upgoing wave division multiplexer is coupled to one of them branch optical fiber by branch coupler respectively.
In multi-wavelength passive optical network system one preferred embodiment provided by the invention, channel center's wavelength of a plurality of branch port of described upgoing wave division multiplexer is respectively the up wavelength of the up wavelength of the up wavelength of described first group of optical network unit, described second group of optical network unit, described the 3rd group of optical network unit and the up wavelength of described the 4th group of optical network unit.
In multi-wavelength passive optical network system one preferred embodiment provided by the invention, described optical line terminal comprises a plurality of optical transmitting sets, and wherein the emission wavelength of each optical transmitting set is distinguished the wherein downstream wavelength of one group of optical network unit.
In multi-wavelength passive optical network system one preferred embodiment provided by the invention, described optical line terminal also comprises a plurality of optical receivers, and wherein the reception wavelength of each optical receiver is distinguished the wherein up wavelength of one group of optical network unit.
Multi-wavelength passive optical network system provided by the invention is divided into many groups with described optical network unit, and the branch optical fiber that connects in the branch port of described first order optical splitter realizes that by the described wavelength reflector of serial connection downstream wavelength separates, adopt described upgoing wave division multiplexer 133 to realize up wavelength multiplexing, thereby realize adopting respectively many data of wavelength being carried not optical network unit on the same group respectively, thus, section just can utilize different wave length to transmit the data of a plurality of optical network units simultaneously at one time, thereby effectively the overall bandwidth of elevator system satisfies user's broadband services to the increased requirement of bandwidth.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings, wherein:
Fig. 1 is the schematic diagram of a kind of preferred embodiment of multi-wavelength passive optical network system provided by the invention.
Embodiment
To the technical scheme in the embodiment of the invention be clearly and completely described below, obviously, described embodiment only is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making all other embodiment that obtain under the creative work prerequisite.
See also Fig. 1, it is the schematic diagram of a kind of preferred embodiment of multi-wavelength passive optical network system provided by the invention.Described passive optical network 100 comprises at least one optical line terminal (OLT) 110, a plurality of optical network unit (ONU) 120-1～120-n and Optical Distribution Network (ODN) 130.Described optical line terminal 110 is connected to described a plurality of optical network unit 120-1～120-n by described Optical Distribution Network 130 with the form of putting multiple spot.Wherein, the direction from described optical line terminal 110 to described optical network unit 120-1～120-n is defined as down direction, and the direction from described optical network unit 120-1～120-n to described optical line terminal 110 is up direction.
Described passive optical network 100 can be the communication network of realizing the data distribution between described optical line terminal 110 and the described optical network unit 120-1～120-n without any need for active device, such as, in specific embodiment, the data distribution between described optical line terminal 110 and the described optical network unit 120-1～120-n can realize by the Passive Optical Components in the described Optical Distribution Network 130 (such as optical splitter or multiplexer).
Described optical line terminal 110 is usually located at the center, and (central office Central Office for example, CO), they can the described a plurality of optical network unit 120-1～120-n of unified management.Described optical line terminal 110 can serve as the media between described optical network unit 120-1～120-n and the upper layer network (not shown), to be forwarded to described optical network unit 120-1～120-n as downlink data from the data that described upper layer network receives, and will be forwarded to described upper layer network from the upstream data that described optical network unit 120-1～120-n receives.
Described optical network unit 120-1～120-n can be arranged on user's side position (such as user resident) by distributed earth.Described optical network unit 120-1～120-n can be the network equipment that is used for communicating with described optical line terminal 110 and user, particularly, described optical network unit 120-1～120-n can serve as the media between described optical line terminal 110 and the described user, for example, described optical network unit 120-1～120-n can be forwarded to described user with the downlink data that receives from described optical line terminal 110, and will be forwarded to described optical line terminal 110 as upstream data from the data that described user receives.Should be appreciated that the structure of described optical network unit 120-1～120-n and Optical Network Terminal (Optical Network Terminal, ONT) close, therefore in the scheme that present specification provides, can exchange between optical network unit and the Optical Network Terminal.
Described Optical Distribution Network 130 can be a data dissemination system, and it can comprise optical fiber, optical coupler, optical branching device, optical multiplexer and/or other equipment.In one embodiment, described optical fiber, optical coupler, optical branching device, optical multiplexer and/or other equipment can be Passive Optical Components, specifically, described optical fiber, optical coupler, optical branching device, optical multiplexer and/or other equipment can be that distribute data signals is the device that does not need power supply to support between described optical line terminal 110 and described optical network unit 120-1～120-n.In addition, in other embodiments, this Optical Distribution Network 130 can also comprise one or more treatment facilities, for example, and image intensifer or trunking (Relay device).In branched structure as shown in Figure 1, described Optical Distribution Network 130 specifically can extend to described a plurality of optical network unit 120-1～120-n from described optical line terminal 110, but also can be configured to other any points to the structure of multiple spot.
In multi-wavelength passive optical network system provided by the invention, described a plurality of optical network unit 120-1～120-n can be divided into many groups, and same group optical network unit adopts respectively with a pair of up-downgoing wavelength, and adopt time division multiplexing mode to carry out multiplexing; The up-downgoing wavelength difference that adopts of optical network unit on the same group not, and (Wavelength Division Multiplexing, WDM) mode is not carried out multiplexing with wavelength division multiplexing by different wave length between on the same group the optical network unit.
Such as, multi-wavelength passive optical network system 100 shown in Figure 1 can adopt four pairs of up-downgoing wavelength, for ease of describing, below described four pairs of up-downgoing wavelength are designated as the first up wavelength X u1 and the first downstream wavelength λ d1, the second up wavelength X u2 and the second downstream wavelength λ d2, the 3rd up wavelength X u3 and the 3rd downstream wavelength λ d3, the 4th up wavelength X u4 and the 4th downstream wavelength λ d4 respectively.And, described a plurality of optical network unit 120-1～120-n can be divided into four groups, wherein the up-downgoing wavelength of first group of optical network unit adopts the described first up wavelength X u1 and the first downstream wavelength λ d1 respectively, the up-downgoing wavelength of second group of optical network unit adopts the described second up wavelength X u2 and the second downstream wavelength λ d2 respectively, the up-downgoing wavelength of the 3rd group of optical network unit adopts the described the 3rd up wavelength X u3 and the 3rd downstream wavelength λ d3 respectively, and the up-downgoing wavelength of the 4th group of optical network unit adopts the described the 4th up wavelength X u4 and the 4th downstream wavelength λ d4 respectively.
Described optical line terminal 110 comprises a plurality of optical transmitting set Tx1～Tx4 and a plurality of optical receiver Rx1～Rx4, wherein said optical transmitting set Tx1～Tx4 is used for launching downlink data to described optical network unit 120-1～120-n, and the emission wavelength of described optical transmitting set Tx1～Tx4 is respectively the described first downstream wavelength λ d1, the described second downstream wavelength λ d2, described the 3rd downstream wavelength λ d3 and described the 4th downstream wavelength λ d4; Described optical receiver Rx1～Rx4 is used for receiving the upstream data from described optical network unit 120-1～120-n, and the reception wavelength of described optical receiver Rx1～Rx4 is respectively the described first up wavelength X u1, the described second up wavelength X u2, the described the 3rd up wavelength X u3 and the 4th up wavelength X u4.
Described optical transmitting set Tx1～Tx4 can be connected to optical coupler 113 by multiplexer 111, thereby described multiplexer 111 can carry out multiplexing formation multi-wavelength downstream signal with the downlink data of described optical transmitting set Tx1～Tx4 emission.Described optical receiver Rx1～Rx4 can be connected to described optical coupler 113 by demodulation multiplexer 112, and described demodulation multiplexer 112 can will be demultiplexed into described optical receiver Rx1～Rx4 respectively from described a plurality of 120-1～120-n and the upstream data that carries through described Optical Distribution Network 130 transmission multi-wavelength upward signals.Described optical coupler 113 can further be connected to Optical Distribution Network 130, described optical coupler 113 will be coupled to described Optical Distribution Network 130 from the multi-wavelength downstream signal of described multiplexer 111 on the one hand, will be coupled to described demodulation multiplexer 112 from the multi-wavelength upward signal of described Optical Distribution Network on the other hand.In specific embodiment, described optical coupler 113 can be wavelength division multiplexing (WDM) device.
Described Optical Distribution Network 130 can adopt two-stage light splitting framework, and it comprises first order optical splitter 131, second level optical splitter 132-1～132-4, upgoing wave division multiplexer 133, branch coupler 134-1～134-4 and trunk coupler 135.
Described first order optical splitter 131 can be the optical branching device of 1:4 for splitting ratio, it comprises a public port and four branch port, the public port of described first order optical splitter 131 is connected to trunk optical fiber 136 by described trunk coupler 135, and the other end of described trunk optical fiber is connected to the optical coupler 113 of described optical line terminal 110 inside.Four branch port of described first order optical splitter 131 are connected with branch optical fiber 137 respectively, and the other end of each branch optical fiber is connected to the public port of one of them second level optical splitter 132-1～132-4 respectively by a branch coupler 134-1～134-4.
In the present embodiment, it is the optical branching device of 1:8,1:16,1:32 or 1:64 that described second level optical splitter 132-1～132-4 can adopt branching ratio, and namely it has a public port and a plurality of branch port.The branch port of each second level optical splitter 132-1～132-4 is connected to wherein one group of optical network unit by profile fiber 138 respectively, and wherein each profile fiber connects the described second level one of them branch port of optical splitter 132-1～132-4 and its corresponding optical network unit 120-1～120-n.
On the other hand, described upgoing wave division multiplexer 133 also comprises public port and four branch port, wherein, the public port of described upgoing wave division multiplexer 133 is connected to described trunk coupler 135, and each branch port of described upgoing wave division multiplexer 133 is connected to its corresponding branch coupler 134-1～134-4 by optical fiber respectively, and is coupled to its corresponding branch optical fiber 137 by described branch coupler 134-1～134-4.In specific embodiment, channel center's wavelength of described four branch port can be respectively the described first up wavelength X u1, the described second up wavelength X u2, the described the 3rd up wavelength X u3 and the described the 4th up wavelength X u4.
Described Optical Distribution Network 130 can also comprise a plurality of wavelength reflector 101 and light absorbers 102 with different reflection wavelengths, wherein, described a plurality of wavelength reflector 101 is connected between the public port of the branch port of described first order optical splitter 131 and corresponding second level optical splitter 132-1～132-4 thereof, and described light absorber 102 is connected between the public port and described trunk coupler 135 of described first order optical splitter 131.
In the present embodiment described, described Optical Distribution Network 130 can comprise four wavelength reflectors 101, for ease of describing, described four wavelength reflectors 101 are the called after first wavelength reflector, the second wavelength reflector, three-wavelength reflector and the 4th wavelength reflector respectively.Wherein, the described first wavelength reflector is serially connected in first branch port of described first order optical splitter 131 and the branch optical fiber between the described second level optical splitter 132-1; The described second wavelength reflector is serially connected in second branch port of described first order optical splitter 131 and the branch optical fiber between the described second level optical splitter 132-2; Described three-wavelength reflector is serially connected in the 3rd branch port of described first order optical splitter 131 and the branch optical fiber between the described second level optical splitter 132-3; Described the 4th wavelength reflector is serially connected in the 4th branch port of described first order optical splitter 131 and the branch optical fiber between the described second level optical splitter 132-4.
The described first wavelength reflector, the described second wavelength reflector, described three-wavelength reflector have different reflection wavelengths and transmission peak wavelength respectively with described the 4th wavelength reflector, particularly, the transmission peak wavelength of the described first wavelength reflector can be the described first downstream wavelength λ d1, and its reflection wavelength is the described second downstream wavelength λ d2, the 3rd downstream wavelength λ d3 and the 4th downstream wavelength λ d4; The transmission peak wavelength of the described second wavelength reflector can be the described second downstream wavelength λ d2, and its reflection wavelength is the described first downstream wavelength λ d1, the 3rd downstream wavelength λ d3 and the 4th downstream wavelength λ d4; The transmission peak wavelength of described three-wavelength reflector can be described the 3rd downstream wavelength λ d3, and its reflection wavelength is the described first downstream wavelength λ d1, the second downstream wavelength λ d2 and the 4th downstream wavelength λ d4; The transmission peak wavelength of described the 4th wavelength reflector can be described the 4th downstream wavelength λ d4, and its reflection wavelength is the described first downstream wavelength λ d1, the second downstream wavelength λ d2 and the 3rd downstream wavelength λ d3.Based on above-mentioned passband centre wavelength, described four wavelength reflectors just can carry out the multichannel multi-wavelength downstream signal of described first order optical splitter 131 outputs respectively the selective wavelength reflection, and reverberation can be absorbed by described light absorber 102, thereby make the downlink data of the different wave length that described Optical Distribution Network 130 can obtain carrying, and the branch optical fiber 137 by its place and corresponding second level optical splitter 132-1～132-4 respectively, export to not optical network unit on the same group.
Particularly, at down direction, the multi-wavelength downstream signal of described optical line terminal 110 outputs is through after described trunk optical fiber 136 transmission, be coupled to described first order optical splitter 131 by described trunk coupler 135,131 pairs of described multi-wavelength downstream signals of described first order optical splitter carry out the power light splitting and form after the multichannel multi-wavelength downstream signal, export to described a plurality of branch optical fiber 137 by its branch port respectively.Because described a plurality of branch optical fibers 137 are serially connected with the wavelength reflector 139 with different transmission peak wavelengths and reflection wavelength respectively, therefore, when each road multi-wavelength downstream signal transmits at corresponding branch optical fiber 137, have only the light signal of one of them wavelength transmission to cross described wavelength reflector 1399, the light signal of other wavelength then is reflected to described first order optical splitter 131, and is absorbed by described light absorber 102.
Such as, the multi-wavelength downstream signal of first branch port output of described first order optical splitter 131 carries out after the filtering through described wavelength reflector 139, the light signal that only has the described first downstream wavelength λ d1 can pass through, namely have only the downlink data of described optical transmitting set Tx1 emission to pass through, the light signal of other downstream wavelength λ d2, λ d3, λ d4 then is reflected back toward described first order optical splitter 131, and is arranged on light absorber 102 absorptions of the public port of described first order optical splitter 131; The multi-wavelength downstream signal of second branch port output of described first order optical splitter 131 carries out after the filtering through described wavelength reflector 139, the light signal that only has the described second downstream wavelength λ d2 can pass through, namely have only the downlink data of described optical transmitting set Tx2 emission to pass through, the light signal of other downstream wavelength λ d1, λ d3, λ d4 then is reflected back toward described first order optical splitter 131, and is arranged on light absorber 102 absorptions of the public port of described first order optical splitter 131; The multi-wavelength downstream signal of the 3rd branch port output of described first order optical splitter 131 carries out after the filtering through described wavelength reflector 139, the light signal that only has described the 3rd downstream wavelength λ d3 can pass through, namely have only the downlink data of described optical transmitting set Tx3 emission to pass through, the light signal of other downstream wavelength λ d1, λ d2, λ d4 then is reflected back toward described first order optical splitter 131, and is arranged on light absorber 102 absorptions of the public port of described first order optical splitter 131; The multi-wavelength downstream signal of the 4th branch port output of described first order optical splitter 131 carries out after the filtering through described wavelength reflector 139, the light signal that only has described the 4th downstream wavelength λ d3 can pass through, namely have only the downlink data of described optical transmitting set Tx4 emission to pass through, the light signal of other downstream wavelength λ d1, λ d2, λ d3 then is reflected back toward described first order optical splitter 131, and is arranged on light absorber 102 absorptions of the public port of described first order optical splitter 131.
Therefore, the light signal that is transferred to described second level optical splitter 132-1～132-4 by each branch optical fiber 137 is respectively the downlink data of the emission of described optical transmitting set Tx1～Tx4, described downlink data carries out after the power light splitting through described second level optical splitter 132-1～132-4, further is transferred to the optical network unit of corresponding group by described profile fiber 138.
And aspect up, the time slot transmission upstream data that the light network unit of each group adopts its up wavelength X u1～λ u4 respectively and authorizes at described optical line terminal 110, because each group optical network unit adopts different up wavelength respectively, therefore same time slot can have the optical network unit of the different up wavelength of a plurality of employings to send upstream data simultaneously.After the upstream data of the different wave length that described not on the same group optical network unit sends converges by its corresponding second level optical splitter 132-1～132-4 respectively, be coupled to the different branch port of described upgoing wave division multiplexer 133 by different branch coupler 134-1～134-4.Described up wavelength multiplexer 133 is further carried out wavelength division multiplexing to the upstream data of described different wave length and is formed after the multi-wavelength upward signal, be coupled to described trunk optical fiber 136 by described trunk coupler 135, and be transferred to described optical line terminal 110 by described trunk optical fiber 136.
Multi-wavelength passive optical network system 100 provided by the invention is divided into many groups with described optical network unit 120-1～120-n, and the branch optical fiber 137 that connects in the branch port of described first order optical splitter 131 realizes that by the described wavelength reflector 139 of serial connection downstream wavelength separate, adopt described upgoing wave division multiplexer 133 to realize up wavelength multiplexing, thereby realize adopting respectively many up-downgoing data of the up-downgoing wavelength being carried not optical network unit on the same group respectively, thus, section just can utilize different wave length to transmit the data of a plurality of optical network units simultaneously at one time, thereby effectively the overall bandwidth of elevator system satisfies user's broadband services to the increased requirement of bandwidth.
The above only is embodiments of the invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes description of the present invention to do; or directly or indirectly be used in other relevant technical field, all in like manner be included in the scope of patent protection of the present invention.
Claims (7)
1. a multi-wavelength passive optical network system is characterized in that, comprises optical line terminal, Optical Distribution Network and a plurality of optical network unit, and described optical line terminal is connected to described optical network unit by described Optical Distribution Network in the mode of putting multiple spot; Wherein, described a plurality of optical network unit is divided into many groups, each group optical network unit adopts different up-downgoing wavelength respectively, described Optical Distribution Network comprises first order optical splitter and a plurality of second level optical splitter, the public port of wherein said first order optical splitter is connected to described optical line terminal by trunk optical fiber, and its branch port connects branch optical fiber respectively and is connected to one group of optical network unit by one of them second level optical splitter, the branch optical fiber that the branch port of described first order optical splitter connects is serially connected with the wavelength reflector respectively, the public port of described first order optical splitter is connected with light absorber, and different wavelength reflectors has different transmission peak wavelengths and reflection wavelength respectively.
2. multi-wavelength passive optical network system according to claim 1, it is characterized in that, described a plurality of optical network unit is divided into four groups, and described first order optical splitter comprises four branch port, each branch port corresponds respectively to wherein one group of optical network unit, and the branch optical fiber that described four branch port connect is serially connected with the first wavelength reflector, the second wavelength reflector, three-wavelength reflector and the 4th wavelength reflector respectively.
3. multi-wavelength passive optical network system according to claim 2 is characterized in that, the transmission peak wavelength of the described first wavelength reflector is the downstream wavelength of first group of optical network unit, and its reflection wavelength is the downstream wavelength of its excess-three group optical network unit; The transmission peak wavelength of the described second wavelength reflector is the downstream wavelength of second group of optical network unit, and its reflection wavelength is the downstream wavelength of its excess-three group optical network unit; The transmission peak wavelength of described three-wavelength reflector is the downstream wavelength of the 3rd group of optical network unit, and its reflection wavelength is the downstream wavelength of its excess-three group optical network unit; The transmission peak wavelength of described the 4th wavelength reflector is the downstream wavelength of the 4th group of optical network unit, and its reflection wavelength is the downstream wavelength of its excess-three group optical network unit.
4. multi-wavelength passive optical network system according to claim 2, it is characterized in that, described Optical Distribution Network also comprises the upgoing wave division multiplexer, the public port of described upgoing wave division multiplexer is coupled to trunk optical fiber by the trunk coupler, and the branch port of described upgoing wave division multiplexer is coupled to one of them branch optical fiber by branch coupler respectively.
5. multi-wavelength passive optical network system according to claim 4, it is characterized in that channel center's wavelength of a plurality of branch port of described upgoing wave division multiplexer is respectively the up wavelength of the up wavelength of the up wavelength of described first group of optical network unit, described second group of optical network unit, described the 3rd group of optical network unit and the up wavelength of described the 4th group of optical network unit.
6. multi-wavelength passive optical network system according to claim 1 is characterized in that, described optical line terminal comprises a plurality of optical transmitting sets, and wherein the emission wavelength of each optical transmitting set is distinguished the wherein downstream wavelength of one group of optical network unit.
7. multi-wavelength passive optical network system according to claim 6 is characterized in that, described optical line terminal also comprises a plurality of optical receivers, and wherein the reception wavelength of each optical receiver is distinguished the wherein up wavelength of one group of optical network unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310242631XA CN103281605A (en) | 2013-06-19 | 2013-06-19 | Multi-wavelength passive optical network system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310242631XA CN103281605A (en) | 2013-06-19 | 2013-06-19 | Multi-wavelength passive optical network system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103281605A true CN103281605A (en) | 2013-09-04 |
Family
ID=49064023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310242631XA Pending CN103281605A (en) | 2013-06-19 | 2013-06-19 | Multi-wavelength passive optical network system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103281605A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109803327A (en) * | 2017-11-16 | 2019-05-24 | 华为技术有限公司 | A kind of communication means and equipment |
| WO2021077890A1 (en) * | 2019-10-23 | 2021-04-29 | 华为技术有限公司 | Port detection method, optical network device and passive optical network system |
| CN115437085A (en) * | 2018-12-29 | 2022-12-06 | 华为技术有限公司 | Light splitting device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1859810A (en) * | 2005-12-31 | 2006-11-08 | 华为技术有限公司 | Passive optical network of multiple optical cut-in net shared optical fiber distribution net and realizing method |
| WO2011110005A1 (en) * | 2010-08-27 | 2011-09-15 | 华为技术有限公司 | Passive optical network and device |
| CN102244539A (en) * | 2010-05-11 | 2011-11-16 | 华为技术有限公司 | Method and system for detecting branch optical fibers, PON (passive optical network) and optical splitter |
| CN102439998A (en) * | 2011-10-25 | 2012-05-02 | 华为技术有限公司 | Passive optical network system and downlink transmission method thereof |
-
2013
- 2013-06-19 CN CN201310242631XA patent/CN103281605A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1859810A (en) * | 2005-12-31 | 2006-11-08 | 华为技术有限公司 | Passive optical network of multiple optical cut-in net shared optical fiber distribution net and realizing method |
| CN102244539A (en) * | 2010-05-11 | 2011-11-16 | 华为技术有限公司 | Method and system for detecting branch optical fibers, PON (passive optical network) and optical splitter |
| WO2011110005A1 (en) * | 2010-08-27 | 2011-09-15 | 华为技术有限公司 | Passive optical network and device |
| CN102439998A (en) * | 2011-10-25 | 2012-05-02 | 华为技术有限公司 | Passive optical network system and downlink transmission method thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109803327A (en) * | 2017-11-16 | 2019-05-24 | 华为技术有限公司 | A kind of communication means and equipment |
| CN115437085A (en) * | 2018-12-29 | 2022-12-06 | 华为技术有限公司 | Light splitting device |
| US11714247B2 (en) | 2018-12-29 | 2023-08-01 | Huawei Technologies Co., Ltd. | Optical splitting apparatus |
| WO2021077890A1 (en) * | 2019-10-23 | 2021-04-29 | 华为技术有限公司 | Port detection method, optical network device and passive optical network system |
| JP2022553365A (en) * | 2019-10-23 | 2022-12-22 | 華為技術有限公司 | Port detection method, optical network device, and passive optical network system |
| JP7473640B2 (en) | 2019-10-23 | 2024-04-23 | 華為技術有限公司 | PORT DETECTION METHOD, OPTICAL NETWORK DEVICE, AND PASSIVE OPTICAL NETWORK SYSTEM - Patent application |
| US12107666B2 (en) | 2019-10-23 | 2024-10-01 | Huawei Technologies Co., Ltd. | Port detection method, optical network device, and passive optical network system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103281605A (en) | Multi-wavelength passive optical network system | |
| CN103281603B (en) | Multi-wavelength passive optical network system | |
| CN103281609A (en) | Multi-wavelength passive optical network system | |
| CN103313153A (en) | Multi-wavelength passive optical network system | |
| CN103281626A (en) | Multi-wavelength passive optical network system | |
| CN103281608A (en) | Multi-wavelength passive optical network system | |
| CN103281604A (en) | Downlink transmission method of multi-wavelength passive optical network system | |
| CN103281610A (en) | Multi-wavelength passive optical network system | |
| CN103297168A (en) | Multi-wavelength passive optical network system | |
| CN103297872A (en) | Multi-wavelength passive optical network system | |
| CN103281606A (en) | Downlink transmission method of multi-wavelength passive optical network system | |
| CN103313152A (en) | Multi-wavelength passive optical network system | |
| CN103297871A (en) | Downlink transmission method of multi-wavelength passive optical network system | |
| CN103281637A (en) | Multi-wavelength passive optical network system | |
| CN103281622A (en) | Multi-wavelength passive optical network system | |
| CN103297874A (en) | Multi-wavelength passive optical network system | |
| CN103281627A (en) | Multi-wavelength passive optical network system | |
| CN103281624A (en) | Multi-wavelength passive optical network system | |
| CN103297875A (en) | Multi-wavelength passive optical network system | |
| CN103281625A (en) | Multi-wavelength passive optical network system | |
| CN103281618A (en) | Multi-wavelength passive optical network system | |
| CN103281623A (en) | Multi-wavelength passive optical network system | |
| CN103281636A (en) | Multi-wavelength passive optical network system | |
| CN103281638A (en) | Multi-wavelength passive optical network system | |
| CN103297167A (en) | Multi-wavelength passive optical network system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: QIN ZHEN Free format text: FORMER OWNER: SUZHOU CAIYUNFEI ELECTRONIC CO., LTD. Effective date: 20140425 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 215021 SUZHOU, JIANGSU PROVINCE TO: 518052 SHENZHEN, GUANGDONG PROVINCE |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20140425 Address after: 518052 room 217, West Tower, Nanshan digital culture industry base, Shenzhen, Nanshan District, Guangdong Applicant after: Qin Zhen Address before: 210, room 13, olive Bay Garden, No. 266, Song Jiang Road, Suzhou, Jiangsu, 215021 Applicant before: Suzhou Caiyunfei Electronic Co., Ltd. |
|
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130904 |
|
| RJ01 | Rejection of invention patent application after publication |