CN103760640B - Based on the fat tree optical router of four ports of Mach once moral photoswitch - Google Patents
Based on the fat tree optical router of four ports of Mach once moral photoswitch Download PDFInfo
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Abstract
The invention discloses a kind of fat tree optical router of four ports based on Mach once moral photoswitch, it comprises: comprise first Mach of once moral photoswitch (M1), second Mach of once moral photoswitch (M2), the 3rd Mach of once moral photoswitch (M3) and the 4th Mach once moral photoswitch (M4).Four kinds of different route-patterns can be realized between above-mentioned four switches, in the above-mentioned four multi-port optical routers that the present invention proposes, input optical signal repeatedly intersects or leads directly in a Mach once moral photoswitch, thus decrease the number of Mach once moral photoswitch and lightguide cross, decrease the optical loss of four multi-port optical routers; Using Mach once moral photoswitch as elementary cell node, utilize Mach once moral photoswitch phase-modulation change optical transmission direction, simultaneously uplink communication and downgoing communication can be realized.
Description
Technical field
The present invention relates to optical communication sheet glazing field of interconnect technologies, particularly relate to a kind of four ports fat tree (Fat-Tree) optical router based on Mach Zeng De (Mach-Zehnder) photoswitch.
Background technology
The people such as RichardA.Soraf have found the plasma dispersion effect of silicon.The university such as 2008-2009, MIT, Rice proposes oneself optical router structure in succession.2010, IBM proposed a kind of four port router based on Mach Zeng De (Mach-Zehnder) photoswitch.Fig. 1 shows the four port router structured flowcharts based on Mach once moral photoswitch that IBM proposes.As shown in Figure 1, this router comprises 6 waveguides and intersects, 6 Mach once moral photoswitch (M1-M6).This router can realize clog-free routing function.But four above-mentioned port router employ 6 Mach once moral light shutter device, chip occupying area is comparatively large, and there are 6 waveguides in addition and intersect, insertion loss is large.
The optical transmission of information principle of Mach once moral photoswitch is described below in conjunction with Fig. 2 A and Fig. 2 B.The state of Mach once moral photoswitch is by the phase decision of modulation arm, if when modulation arm phase place is 0, then from the input signal of input port I1 by Mach once moral photoswitch export from O2 port, from the input signal of input port I2 by Mach once moral photoswitch export from O1 port, thus realize the intersection (cross) of input signal, as shown in Figure 2 A.If when phase modulation is π, then from the input signal of input port I1 by Mach once moral photoswitch export from O1 port, from the input signal of input port I2 by Mach once moral photoswitch export from O2 port, thus to realize straight-through (bar) of input signal, as shown in Figure 2 B.Visible, by the phase place of modulation corresponding modulating arm, the switching at runtime of Mach once moral photoswitch two states can be realized.But due to the characteristic of Mach once moral photoswitch, input signal only has straight-through or intersects two states.
Summary of the invention
(1) technical matters that will solve
In view of above-mentioned technical matters, the invention provides a kind of fat tree optical router of four ports based on Mach once moral photoswitch.
(2) technical scheme
The invention provides a kind of fat tree optical router of four ports based on Mach once moral photoswitch, it is characterized in that, comprising:
First Mach of once moral photoswitch (M1), its first input end is as the first input end mouth of the fat tree optical router of this four port, and its first output terminal is as the second output port of the fat tree optical router of this four port;
Second Mach of once moral photoswitch (M2), its first input end is as the second input port of the fat tree optical router of this four port, and its first output terminal is as the first output port of the fat tree optical router of this four port;
3rd Mach of once moral photoswitch (M3), its first input end is connected to the second output terminal of first Mach of once moral photoswitch (M1), second input end is connected to the second output terminal of second Mach of once moral photoswitch (M2), its first output terminal is as the 3rd output port of the fat tree optical router of this four port, and the second output terminal is as the 4th output port of the fat tree optical router of this four port;
4th Mach of once moral photoswitch (M4), its first input end is as the 3rd input port of the fat tree optical router of this four port, its second input end is as the four-input terminal mouth of the fat tree optical router of this four port, its first output terminal connects the second input end of first Mach of once moral photoswitch (M1), and its second output terminal connects the second input end of second Mach of once moral photoswitch (M2).
(3) beneficial effect
As can be seen from technique scheme, the four multi-port optical routers that the present invention is based on Mach once moral photoswitch have following beneficial effect:
(1) by optimizing optical route, input optical signal repeatedly intersects or straight-through in a Mach once moral photoswitch, thus decreases the number of Mach once moral photoswitch and lightguide cross, decreases the optical loss of four multi-port optical routers;
(2) using Mach once moral photoswitch as elementary cell node, utilize Mach once moral photoswitch phase-modulation change optical transmission direction, simultaneously uplink communication and downgoing communication can be realized.
Accompanying drawing explanation
Fig. 1 is the schematic diagram based on Mach once four multi-port optical routers of moral photoswitch in prior art;
Fig. 2 A and Fig. 2 B is the schematic diagram of the modulation arm phase place of Mach once moral photoswitch in prior art optical transmission signal when being respectively 0 and π;
Fig. 3 is the structural representation of fat tree;
Fig. 4 is the structural representation based on the Mach once fat tree optical router of four ports of moral photoswitch in the embodiment of the present invention;
Fig. 5 is for the fat tree optical router of four port shown in Fig. 4 is at the route schematic diagram of state 1;
Fig. 6 is for the fat tree optical router of four port shown in Fig. 4 is at the route schematic diagram of state 2;
Fig. 7 is for the fat tree optical router of four port shown in Fig. 4 is at the route schematic diagram of state 3;
Fig. 8 is for the fat tree optical router of four port shown in Fig. 4 is at the route schematic diagram of state 4.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.It should be noted that, in accompanying drawing or instructions describe, similar or identical part all uses identical figure number.The implementation not illustrating in accompanying drawing or describe is form known to a person of ordinary skill in the art in art.In addition, although herein can providing package containing the demonstration of the parameter of particular value, should be appreciated that, parameter without the need to definitely equaling corresponding value, but can be similar to corresponding value in acceptable error margin or design constraint.
The present invention is in four ports fat tree (Fat-Tree) optical router based on Mach Zeng De (Mach-Zehnder) photoswitch, by optimizing the topological structure of this optics route, thus the number that once moral photoswitch and the waveguide of minimizing Mach intersects, and then decrease the loss of four ports fat tree optical router.
Fig. 3 shows the structural representation of fat tree.As shown in Figure 3, described fat tree construction comprises: processor and optical router.A kind of four multi-port optical routers based on Mach once moral photoswitch that each node in fat tree construction is proposed by the present invention realize, processor is connected to the optical router of the bottom as leaf node, respectively with 1 from the bottom, 2,4, optical router is formed optical router cluster according to Geometric Sequence by 8 grades, and every layer of optical router cluster has father's optical router cluster and two sub-optical router clusters.Described optical router cluster is a kind of distortion of binary tree structure.Described optical router comprises the first ~ four port totally four ports, and the first port and the second port are connected to father's router cluster, and the 3rd port and the 4th port are connected to sub-router cluster.Fig. 4 shows a kind of structured flowchart based on Mach once four multi-port optical routers of moral photoswitch provided in the embodiment of the present invention.As shown in Figure 4, this four port fat tree optical router comprises the Mach once moral photoswitch (M1, M2, M3 and M4) that four have identical structure and size, each Mach once moral photoswitch has two input ends and two output terminals, and four ports of this optical router comprise a Mach once input end of moral photoswitch and an output terminal respectively, wherein:
First Mach of once moral photoswitch (M1), its first input end is as the first input end mouth of the fat tree optical router of this four port, and its first output terminal is as the second output port of the fat tree optical router of this four port;
Second Mach of once moral photoswitch (M2), its first input end is as the second input port of the fat tree optical router of this four port, and its first output terminal is as the first output port of the fat tree optical router of this four port;
3rd Mach of once moral photoswitch (M3), its first input end is connected to the second output terminal of first Mach of once moral photoswitch (M1), second input end is connected to the second output terminal of second Mach of once moral photoswitch (M2), its first output terminal is as the 3rd output port of the fat tree optical router of this four port, and the second output terminal is as the 4th output port of the fat tree optical router of this four port;
4th Mach of once moral photoswitch (M4), its first input end is as the 3rd input port of the fat tree optical router of this four port, its second input end is as the four-input terminal mouth of the fat tree optical router of this four port, its first output terminal connects the second input end of first Mach of once moral photoswitch (M1), and its second output terminal connects the second input end of second Mach of once moral photoswitch (M2).
In the present embodiment, Mach was once all connected by optical waveguide between each input end of moral photoswitch M1, M2, M3, M4 and output terminal.
Find out from said structure, this four multi-port optical router has once moral photoswitch and three waveguides of four Mach to intersect (as shown in Figure 4).And the four multi-port optical routers of IBM have once moral photoswitch and six waveguides of six Mach to intersect in prior art.Therefore compared to prior art, The present invention reduces Mach once 33% of moral photoswitch number and the number of lightguide cross 50%, decrease the optical loss of four multi-port optical routers.
In addition, for optical router, same port includes a Mach once input end of moral photoswitch and an output terminal, the corresponding output end of other port of input end signal Guided optical router of this port is called uplink communication, and this output terminal that led by the input end signal of other port of optical router is called downgoing communication.The uplink communication of the input end of any one port of four multi-port optical routers can not have influence on the downgoing communication of the output terminal of the same port of this optical router, is obtained by exhaustive Link State.
In the four multi-port optical routers meeting above-mentioned annexation, by regulating in four multi-port optical routers the phase place of four Mach once moral photoswitch (M1, M2, M3, M4), four kinds of multi-form routes can be realized, as shown in table 1.In Table 1, for convenience of representing, first input end mouth is designated as 1, and the first output port is designated as 1 ', second input port is designated as 2, and the second output port is designated as 2 ', and the 3rd input port is designated as 3,3rd output port is designated as 3 ', and the 3rd input port is designated as 3, and the 3rd output port is designated as 4 '.It is emphasized that each following port all relative to four multi-port optical routers, instead of relative to Mach once moral photoswitch.
Table 1 the present invention four port fat tree optical router routing table
| State | Route | M1 | M2 | M3 | M4 |
| 1 | 1→3′，2→4′，3→1′，4→2′ | Intersect | Intersect | Straight-through | Intersect |
| 2 | 1→4′，2→3′，3→1′，4→2′ | Intersect | Intersect | Intersect | Intersect |
| 3 | 1→3′，2→4′，3→2′，4→1′ | Intersect | Intersect | Straight-through | Straight-through |
| 4 | 1→4′，2→3′，3→2′，4→1′ | Intersect | Intersect | Intersect | Straight-through |
Below with reference to table 1, respectively each state that the present invention is based on Mach once four port router of moral photoswitch is described in detail.
1, state 1
Please refer to table 1 and Fig. 5, in state 1, once moral photoswitch M1, M2 and M4 were for intersecting for Mach, and Mach once moral photoswitch M4 is straight-through.Each route comprises:
(1) input signal is from first input end mouth through Mach once moral photoswitch M1 and Mach once moral photoswitch M3, is exported, i.e. first input end mouth → the 3rd output port by the 3rd output port;
(2) input signal is from the second input port through Mach once moral photoswitch M2 and Mach once moral photoswitch M3, is exported, i.e. the second input port → the 4th output port by the 4th output port;
(3) input signal is from the 3rd input port through Mach once moral photoswitch M4 and Mach once moral photoswitch M2, is exported, i.e. the 3rd input port → the first output port by the 4th output port;
(4) input signal is from four-input terminal mouth through Mach once moral photoswitch M4 and Mach once moral photoswitch M1, is exported, i.e. four-input terminal mouth → the second output port by the first output port.
Visible, input signal to be coupled to other completely output port from input port is realized by the change of adjustment phase place, and for input end and the output terminal of each port, communication can be carried out with other ports simultaneously, thus carry out uplink communication and downgoing communication simultaneously.And lower 4 links of this state have passed through altogether once moral photoswitch and 6 waveguides of 8 Mach to intersect.And under identical state, in prior art, the four multi-port optical routers of IBM have passed through altogether 12 Mach once moral photoswitch and 12 waveguides intersections.Therefore the optical router of this invention design can effectively reduce optical loss.
2, state 2
Please refer to table 1 and Fig. 6, state 2 times, Mach once moral photoswitch M1, M2, M3, M4 is intersection, and each route comprises:
(1) input signal is from first input end mouth through Mach once moral photoswitch M1 and Mach once moral photoswitch M3, is exported, i.e. first input end mouth → the 4th output port by the 3rd output port;
(2) input signal is from the second input port through Mach once moral photoswitch M2 and Mach once moral photoswitch M3, is exported, i.e. the second input port → the 3rd output port by the 4th output port;
(3) input signal is from the 3rd input port through Mach once moral photoswitch M4 and Mach once moral photoswitch M2, is exported, i.e. the 3rd input port → the first output port by the 4th output port;
(4) input signal is from four-input terminal mouth through Mach once moral photoswitch M4 and Mach once moral photoswitch M1, is exported, i.e. four-input terminal mouth → the second output port by the first output port.
Visible, realize input signal by the change of adjustment phase place and be coupled to corresponding output port completely from input port, and for input port and the output port of each port, communication can be carried out with other ports simultaneously, thus carry out uplink communication and downgoing communication simultaneously.And lower 4 links of this state have passed through altogether once moral photoswitch and 6 waveguides of 8 Mach to intersect.And under identical state, the four multi-port optical routers of IBM have passed through altogether once moral photoswitch and 12 waveguides of 12 Mach and intersect.Therefore the optical router of this invention design can effectively reduce optical loss.
3, state 3
Please refer to table 1 and Fig. 7, state 3 times, once moral photoswitch M1, M2 are for intersecting for Mach, and Mach once moral photoswitch M1, M2 is straight-through, and each route comprises:
(1) input signal is from first input end mouth through Mach once moral photoswitch M1 and Mach once moral photoswitch M3, is exported, i.e. first input end mouth → the 3rd output port by the 3rd output port;
(2) input signal is from the second input port through Mach once moral photoswitch M2 and Mach once moral photoswitch M3, is exported, i.e. the second input port → the 4th output port by the 4th output port;
(3) input signal is from the 3rd input port through Mach once moral photoswitch M4 and Mach once moral photoswitch M1, is exported, i.e. the 3rd input port → the second output port by the 4th output port;
(4) input signal is from four-input terminal mouth through Mach once moral photoswitch M4 and Mach once moral photoswitch M2, is exported, i.e. four-input terminal mouth → the first output port by the first output port.
Visible, realize input signal by the change of adjustment phase place and be coupled to corresponding output port completely from input port, and for input port and the output port of each port, communication can be carried out with other ports simultaneously, thus carry out uplink communication and downgoing communication simultaneously.And lower 4 links of this state have passed through altogether once moral photoswitch and 6 waveguides of 8 Mach to intersect.And under identical state, the four multi-port optical routers of IBM have passed through altogether once moral photoswitch and 12 waveguides of 12 Mach and intersect.Therefore the optical router of this invention design can effectively reduce optical loss.
4, state 4
Please refer to table 1 and Fig. 8, state 4 times, Mach once moral photoswitch M1, M2, M3, M4 is intersection, and each route comprises:
(1) input signal is from first input end mouth through Mach once moral photoswitch M1 and Mach once moral photoswitch M3, is exported, i.e. first input end mouth → the 4th output port by the 3rd output port;
(2) input signal is from the second input port through Mach once moral photoswitch M2 and Mach once moral photoswitch M3, is exported, i.e. the second input port → the 3rd output port by the 4th output port;
(3) input signal is from the 3rd input port through Mach once moral photoswitch M4 and Mach once moral photoswitch M2, is exported, i.e. the 3rd input port → the first output port by the 4th output port;
(4) input signal is from four-input terminal mouth through Mach once moral photoswitch M4 and Mach once moral photoswitch M1, is exported, i.e. four-input terminal mouth → the second output port by the first output port.
Visible, realize input signal by the change of adjustment phase place and be coupled to corresponding output port completely from input port, and for input port and the output port of each port, communication can be carried out with other ports simultaneously, thus carry out uplink communication and downgoing communication simultaneously.And lower 4 links of this state have passed through altogether once moral photoswitch and 6 waveguides of 8 Mach to intersect.And under identical state, the four multi-port optical routers of IBM have passed through altogether once moral photoswitch and 12 waveguides of 12 Mach and intersect.Therefore the optical router of this invention design can effectively reduce optical loss.
So far, by reference to the accompanying drawings the present embodiment has been described in detail.Describe according to above, those skilled in the art should to the present invention is based on Mach once the fat tree optical router of four ports of moral photoswitch had and be clearly familiar with.
In addition, the above-mentioned definition to each element is not limited in the various concrete structure or shape mentioned in embodiment, and those of ordinary skill in the art can replace it with knowing simply.
In sum, the fat tree optical router of four ports that the present invention is based on Mach once moral photoswitch takes full advantage of the characteristic of Mach once moral photoswitch, makes four ports can carry out communication simultaneously, is in clog-free state, decrease lightguide cross quantity, Loss reducing simultaneously.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1., based on the fat tree optical router of four ports of Mach once moral photoswitch, it is characterized in that, comprising:
First Mach of once moral photoswitch (M1), its first input end is as the first input end mouth of the fat tree optical router of this four port, and its first output terminal is as the second output port of the fat tree optical router of this four port;
Second Mach of once moral photoswitch (M2), its first input end is as the second input port of the fat tree optical router of this four port, and its first output terminal is as the first output port of the fat tree optical router of this four port;
3rd Mach of once moral photoswitch (M3), its first input end is connected to the second output terminal of first Mach of once moral photoswitch (M1), second input end is connected to the second output terminal of second Mach of once moral photoswitch (M2), its first output terminal is as the 3rd output port of the fat tree optical router of this four port, and the second output terminal is as the 4th output port of the fat tree optical router of this four port;
4th Mach of once moral photoswitch (M4), its first input end is as the 3rd input port of the fat tree optical router of this four port, its second input end is as the four-input terminal mouth of the fat tree optical router of this four port, its first output terminal connects the second input end of first Mach of once moral photoswitch (M1), and its second output terminal connects the second input end of second Mach of once moral photoswitch (M2).
2. the fat tree optical router of four port according to claim 1, is characterized in that:
Described first Mach once moral photoswitch (M1), second Mach once moral photoswitch (M2), the 3rd Mach once moral photoswitch (M3) and the 4th Mach once moral photoswitch (M4) for having the Mach once moral photoswitch of identical structure and size;
Above-mentioned first Mach once moral photoswitch (M1) once connected by optical waveguide between each input end of moral photoswitch (M4) and output terminal to the 4th Mach.
3. the fat tree optical router of four port according to claim 1, is characterized in that, described Mach once moral photoswitch tool leads directly to and intersection two states.
4. the fat tree optical router of four port according to claim 3, it is characterized in that, described first Mach once moral photoswitch (M1), second Mach once moral photoswitch (M2), the 4th Mach once moral photoswitch (M4) be crossing condition; 3rd Mach once moral photoswitch (M3) be pass-through state;
Thus the route realized between the following input/output end port of four multi-port optical routers: first input end mouth → the 3rd output port; Second input port → the 4th output port; 3rd input port → the first output port; Four-input terminal mouth → the second output port.
5. the fat tree optical router of four port according to claim 3, it is characterized in that, first Mach once moral photoswitch (M1), second Mach once moral photoswitch (M2), the 3rd Mach once moral photoswitch (M3), the 4th Mach once moral photoswitch (M4) be crossing condition;
Thus the route realized between the following input/output end port of four multi-port optical routers: the route of first input end mouth → the 4th output port, the second input port → the 3rd output port, the 3rd input port → the first output port, four-input terminal mouth → the second output port.
6. the fat tree optical router of four port according to claim 3, is characterized in that, described first Mach once moral photoswitch (M1), second Mach once moral photoswitch (M2) be crossing condition; 3rd Mach once moral photoswitch (M3), the 4th Mach once moral photoswitch (M4) be pass-through state;
Thus the route realized between the following input/output end port of four multi-port optical routers: the route of first input end mouth → the 3rd output port, the second input port → the 4th output port, the 3rd input port → the second output port, four-input terminal mouth → the first output port.
7. the fat tree optical router of four port according to claim 3, it is characterized in that, described first Mach once moral photoswitch (M1), second Mach once moral photoswitch (M2), the 3rd Mach once moral photoswitch (M3) be crossing condition; 4th Mach once moral photoswitch (M4) be pass-through state;
Thus the route realized between the following input/output end port of four multi-port optical routers: the route of first input end mouth → the 4th output port, the second input port → the 3rd output port, the 3rd input port → the second output port, four-input terminal mouth → the first output port.
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| CN114647034B (en) * | 2020-12-18 | 2023-03-24 | 联合微电子中心有限责任公司 | Optical switch, optical network and optical chip |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1387628A (en) * | 1999-11-01 | 2002-12-25 | 阿尔卡塔尔光电子英国有限公司 | Phaser with flattened pass-band |
| CN101872039A (en) * | 2010-05-12 | 2010-10-27 | 中国科学院半导体研究所 | 4*4 non-blocking optical router based on active micro-ring resonator |
| CN103345023A (en) * | 2013-07-17 | 2013-10-09 | 中国科学院半导体研究所 | Four-port optical route based on Mach-Zehnder optical switches |
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| US20020044318A1 (en) * | 2000-10-16 | 2002-04-18 | Henry Hung | Add/drop apparatus using multiple wavelength michelson interferometer |
| US20050163418A1 (en) * | 2004-01-23 | 2005-07-28 | Wong Chee W. | Single-level no-crossing microelectromechanical hitless switch for high density integrated optics |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1387628A (en) * | 1999-11-01 | 2002-12-25 | 阿尔卡塔尔光电子英国有限公司 | Phaser with flattened pass-band |
| CN101872039A (en) * | 2010-05-12 | 2010-10-27 | 中国科学院半导体研究所 | 4*4 non-blocking optical router based on active micro-ring resonator |
| CN103345023A (en) * | 2013-07-17 | 2013-10-09 | 中国科学院半导体研究所 | Four-port optical route based on Mach-Zehnder optical switches |
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