CN101938312A - Double-fibre passive bus type optical network structure - Google Patents
Double-fibre passive bus type optical network structure Download PDFInfo
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- CN101938312A CN101938312A CN2010102680961A CN201010268096A CN101938312A CN 101938312 A CN101938312 A CN 101938312A CN 2010102680961 A CN2010102680961 A CN 2010102680961A CN 201010268096 A CN201010268096 A CN 201010268096A CN 101938312 A CN101938312 A CN 101938312A
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Abstract
The invention discloses a double-fibre passive bus type optical network structure comprising two main optical fibres, an along-line node connection structure and an end node connection structure, wherein the along-line node connection structure is connected to the two main optical fibres, and the end node connection structure is connected to the two ends of the two main optical fibres; each along-line node connection structure is formed by connecting more than one light emission module with a light receiver module by a plurality of optical couplers; each along-line node connection structure comprises the following optical couplers: first to fourth 1*2 optical couplers, a P*3 optical coupler and a 3*P optical coupler; and the end node connection structure is composed of an N*2 star-type optical coupler, a 2*N star-type optical coupler, a corresponding light emission module and a corresponding light receiver module. Any one node in the bus type optical network can receive optical signals emitted by all nodes including self for once.
Description
Technical field
The present invention relates to technical field of optical fiber communication.
Background technology
Existing passive bus type optical network structure, main by two main fibers, be connected two nodes on the main cable and constitute, each node comprises more than one light emission module TX and light is accepted module RX, the light signal that any one node sends on the optical-fiber network, can be received by the whole nodes that comprise oneself, any two nodes on the bus can be realized the intercommunication of light signal, in order in the bus-type optical-fiber network, to increase more node, can increase star-like smooth shunting coupler in the one or both ends of optical network system.As shown in Figure 3, existing a kind of optical network structure, left end inserts the star-like smooth shunting coupler of N * N, and right-hand member inserts the star-like smooth shunting coupler of M * M, and when the light signal of any one TX end input, all RX all can receive.But there are the following problems for this kind structure: receive the light signal of TXN transmission as RXN after, with this optical signal transmission in a core of twin-core bus system, star-like optical branching device M * M by the other end receives, again be transferred to this light signal among the RXN again, go down with regard to having formed light signal unlimited circle transmission in this bus-network like this, cause the stack of light signal, make the overall optical network system all be affected.
Summary of the invention
The object of the present invention is to provide a kind of two fine passive bus type optical network structure, solve the problem of the signal stack that exists in the prior art.
Technical scheme of the present invention is: a kind of two fine passive bus type optical network structures, comprise that two are extended setting side by side, the transmitting optical signal direction opposite first, second main fiber and a plurality of nodes that are connected on two main fibers, described node has two kinds, a kind of is the node connecting structure along the line that distributes one by one along the main fiber bearing of trend, another kind is the terminated nodes syndeton that is connected the two ends of two main fibers, described each node connecting structure along the line is by more than one light emission module, more than one Optical Receivers connects and composes by a plurality of optical couplers, optical coupler in each node connecting structure along the line has: first～the 41 * 2 optical coupler, P * 3 optical couplers, 3 * P optical coupler, the number of P and light emission module, the number of Optical Receivers is identical, its connected mode is: the output of each light emission module of node connecting structure along the line is connected with each input of P * 3 optical couplers respectively, and the input of each Optical Receivers of node connecting structure along the line is connected with each output of 3 * P optical coupler respectively; First, second 1 * 2 optical coupler 1,2 is connected in turn on first main fiber along optical transmission direction, the input of the one 1 * 2 optical coupler is connected with first main fiber by the input port of node structure, two outputs of the one 1 * 2 optical coupler are connected with the first input end of the 21 * 2 optical coupler, the first input end of 3 * P optical coupler respectively, second input of the 21 * 2 optical coupler is connected with first output of P * 3 optical couplers, and the output of the 21 * 2 optical coupler is connected with first main fiber by the delivery outlet of node structure; Three, the 41 * 2 optical coupler is connected in turn on second main fiber along optical transmission direction, the input of the 31 * 2 optical coupler is connected with second main fiber by the input port of node structure, two outputs of the 31 * 2 optical coupler are connected with the first input end of the 41 * 2 optical coupler, second input of 3 * P optical coupler respectively, second input of the 41 * 2 optical coupler is connected with second output of P * 3 optical couplers, and the output of the 41 * 2 optical coupler is connected with second main fiber by the delivery outlet of node structure; The 3rd output of P * 3 optical couplers is connected with the 3rd input of 3 * P optical coupler; Described each terminated nodes syndeton is by more than one light emission module, more than one Optical Receivers connects and composes by a star-like optical coupler in N * 2 and the star-like optical coupler of 2 * N, the wherein number of N and light emission module, the number of Optical Receivers is identical, export/go into the corresponding light-receiving/transmitter module that connects each star-like distribution of end for the N of two star-like optical couplers, two of two star-like optical couplers export/go into end except that correspondence interconnects between the two, also with the terminated nodes syndeton on the input/go out end to connect of two main fibers being connected.
The number of described N, P is all between 1～32.
Described P=3, P * 3 optical couplers, 3 * P optical coupler in the node connecting structure along the line are 3 * 3 optical couplers.
Bus-type optical-fiber network of the present invention has improved the access form of the light shunting coupler on total optical fiber twin-core main line, can and realize that any one node in the bus-type optical-fiber network can both receive the light signal that all nodes of comprising oneself send, and receive only once, and can stop the circle transmission light signal, there is not the interference of signal stack in the optical-fiber network.
Description of drawings
Fig. 1 is the structural representation of embodiments of the invention 1;
Fig. 2 is the structural representation of embodiments of the invention 2;
Fig. 3 is the prior art constructions schematic diagram.
Embodiment
As shown in Figure 1, embodiments of the invention 1, be to extend side by side by two to be provided with, the transmitting optical signal direction opposite first, second main fiber 30,40 and a plurality of nodes that are connected on two main fibers constitute, the syndeton of described node and main fiber has two kinds, a kind of is four node connecting structures 10 along the line that distribute one by one along the main fiber bearing of trend, certainly node connecting structure structure 10 along the line can be according to concrete needs and 1 to 3 of the actual state arrangement of network or a plurality of above 4, and another kind is the terminated nodes syndeton 20 that is connected the two ends of two main fibers, 21.Arrow among the figure is represented the optical signal transmission direction.
Described each node connecting structure 10 along the line all is by three light emission module TX1～TX3, three Optical Receivers RX1～RX3 connect and compose by a plurality of optical couplers, optical coupler in each node connecting structure along the line has: first～the 41 * 2 optical coupler 1,2,3,4, first, the 23 * 3 optical coupler 5,6, its connected mode is: each output of light emission module TX1～TX3 is connected with three inputs of the one 3 * 3 optical coupler 5 respectively, and each input of Optical Receivers RX1～RX3 is connected with three outputs of the 23 * 3 optical coupler 6 respectively; First, the 21 * 2 optical coupler 1,2 are connected in turn on first main fiber 30 along optical transmission direction, the input of the one 1 * 2 optical coupler 1 is connected with first main fiber 30 by the input port of node structure, two outputs of the one 1 * 2 optical coupler 1 respectively with the first input end of the 21 * 2 optical coupler 2, the first input end of the 23 * 3 optical coupler 6 connects, second input of the 21 * 2 optical coupler 2 is connected with first output of the one 3 * 3 optical coupler 5, and the output of the 21 * 2 optical coupler 2 is connected with first main fiber 30 by the delivery outlet of node structure; The 3rd, the 41 * 2 optical coupler 3,4 are connected in turn on second main fiber 40 along optical transmission direction, the input of the 31 * 2 optical coupler 3 is connected with second main fiber 40 by the input port of node structure, two outputs of the 31 * 2 optical coupler 3 respectively with the first input end of the 41 * 2 optical coupler 4, second input of the 23 * 3 optical coupler 6 connects, second input of the 41 * 2 optical coupler 4 is connected with second output of the one 3 * 3 optical coupler 5, and the output of the 41 * 2 optical coupler 4 is connected with second main fiber 40 by the delivery outlet of node structure; The 3rd output of the one 3 * 3 optical coupler 5 is connected with the 3rd input of the 23 * 3 optical coupler 6.
Described two terminated nodes syndetons 20,21 structures are basic identical, difference only is the turnover number of used coupler and counting out of corresponding joint, terminated nodes syndeton 20 with the left side is that example is introduced, comprise that one 10 * 2 star-like optical coupler 201 and one 2 * 10 star-like optical coupler 202 constitute, 10 input correspondences of 10 * 2 star-like optical couplers 201 are connected with the light emission module TX1 ~ TX10 of 10 star-like distributions, 10 output correspondences of 2 * 10 star-like optical couplers 202 are connected with the Optical Receivers RX1 ~ RX10 of 10 star-like distributions, first of 10 * 2 star-like optical couplers 201, the second two outputs respectively with the first input end of 2 * 10 star-like optical couplers 202, the input of second main fiber 40 connects, and second input of 2 * 10 star-like optical couplers 202 is connected with the output of second main fiber 30.Comprise one 16 * 2 star-like optical coupler and one 2 * 16 star-like optical coupler and corresponding 16 pairs of light emissions, the receiver module that is connected in the terminated nodes syndeton 21 on right side, with two I/O ends of each star-like optical coupler outside corresponding transmit/receive module connects except between two planet couplers, connecting also with the terminated nodes syndeton on the corresponding connection of input/go out to hold of two main fibers being connected.
As shown in Figure 2, embodiments of the invention 2, be actually the situation that the turnover number of each optical coupler of the number of the light transmit/receive module in each node connecting structure among the embodiment 1 and corresponding with it connection is generalized to according to actual needs one or more with the difference of embodiment 1, light emission module in each node connecting structure 50 along the line, Optical Receivers is P, be respectively TX1～TXP, RX1～RXP, Dui Ying optical coupler is respectively that P * 3 optical couplers close device 55 and 3 * P optical coupler closes device 56 with it, and other syndetons in the node connecting structure 50 along the line are identical with embodiment 1.Two terminated nodes syndeton 60,61 structures are identical, terminated nodes syndeton 60 with the left side is that example is introduced, light emission in terminated nodes syndeton 60, receiver module are N, be respectively TX1～TXN and RX1～RXN, Dui Ying star-like optical coupler is respectively that the star-like optical coupler in N * 2 closes device 601 and the star-like optical coupler of 2 * N closes device 602 with it, and other syndetons are identical with embodiment 1 in the terminated nodes syndeton 60.Light emission in the terminated nodes syndeton 61, receiver module have M respectively, and Dui Ying star-like optical coupler is respectively the star-like optical coupler in M * 2 and closes device and the star-like optical coupler of 2 * M with it.
In the above embodiment of the present invention, can be according to the turnover number model that the insertion loss of optical coupler is calculated and actual required node number comes each coupler of selective light, the number of N, M, P both can be identical, also can be different.Can select commonly 1,2,4,8,10,16,32, also can be special unconventional number.Number can be greater than 32 under the situation that process conditions allow.
Claims (3)
1. two fine passive bus type optical network structure, comprise that two are extended setting side by side, the transmitting optical signal direction opposite first, second main fiber and a plurality of nodes that are connected on two main fibers, described node has two kinds, a kind of is the node connecting structure along the line that distributes one by one along the main fiber bearing of trend, another kind is the terminated nodes syndeton that is connected the two ends of two main fibers, it is characterized in that: described each node connecting structure along the line is by more than one light emission module, more than one Optical Receivers connects and composes by a plurality of optical couplers, optical coupler in each node connecting structure along the line has: first～the 41 * 2 optical coupler, P * 3 optical couplers, 3 * P optical coupler, the number of P and light emission module, the number of Optical Receivers is identical, its connected mode is: the output of each light emission module of node connecting structure along the line is connected with each input of P * 3 optical couplers respectively, and the input of each Optical Receivers of node connecting structure along the line is connected with each output of 3 * P optical coupler respectively; First, second 1 * 2 optical coupler 1,2 is connected in turn on first main fiber along optical transmission direction, the input of the one 1 * 2 optical coupler is connected with first main fiber by the input port of node structure, two outputs of the one 1 * 2 optical coupler are connected with the first input end of the 21 * 2 optical coupler, the first input end of 3 * P optical coupler respectively, second input of the 21 * 2 optical coupler is connected with first output of P * 3 optical couplers, and the output of the 21 * 2 optical coupler is connected with first main fiber by the delivery outlet of node structure; Three, the 41 * 2 optical coupler is connected in turn on second main fiber along optical transmission direction, the input of the 31 * 2 optical coupler is connected with second main fiber by the input port of node structure, two outputs of the 31 * 2 optical coupler are connected with the first input end of the 41 * 2 optical coupler, second input of 3 * P optical coupler respectively, second input of the 41 * 2 optical coupler is connected with second output of P * 3 optical couplers, and the output of the 41 * 2 optical coupler is connected with second main fiber by the delivery outlet of node structure; The 3rd output of P * 3 optical couplers is connected with the 3rd input of 3 * P optical coupler; Described each terminated nodes syndeton is by more than one light emission module, more than one Optical Receivers connects and composes by a star-like optical coupler in N * 2 and the star-like optical coupler of 2 * N, the wherein number of N and light emission module, the number of Optical Receivers is identical, export/go into the corresponding light-receiving/transmitter module that connects each star-like distribution of end for the N of two star-like optical couplers, two of two star-like optical couplers export/go into end except that correspondence interconnects between the two, also with the terminated nodes syndeton on the input/go out end to connect of two main fibers being connected.
2. two fine passive bus type optical network structure according to claim 1, it is characterized in that: the number of described N, P is all between 1～32.
3. two fine passive bus type optical network structure according to claim 1 is characterized in that: described P=3, P * 3 optical couplers, 3 * P optical coupler in the node connecting structure along the line are 3 * 3 optical couplers.
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| CN104660475A (en) * | 2015-02-05 | 2015-05-27 | 广州市地下铁道总公司 | Asymmetric passive optical fiber train bus topology structure and terminal interconnection method thereof |
| CN103716092B (en) * | 2013-12-16 | 2016-07-13 | 天津大学 | The communication means of the group network system of bidirectional optical fiber communication in a kind of bus-network |
| CN105812704A (en) * | 2016-05-16 | 2016-07-27 | 深圳市昊源科技有限公司 | Signal extending device and cable |
| CN116506017A (en) * | 2023-06-28 | 2023-07-28 | 深圳市埃尔法光电科技有限公司 | Optical transmission system for transmitting signals through photoelectric co-packaging module |
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| CN116506017A (en) * | 2023-06-28 | 2023-07-28 | 深圳市埃尔法光电科技有限公司 | Optical transmission system for transmitting signals through photoelectric co-packaging module |
| CN116506017B (en) * | 2023-06-28 | 2023-09-29 | 深圳市埃尔法光电科技有限公司 | Optical transmission system for transmitting signals through photoelectric co-packaging module |
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