CN1170179C - Optical switch matrix - Google Patents
Optical switch matrix Download PDFInfo
- Publication number
- CN1170179C CN1170179C CNB021599327A CN02159932A CN1170179C CN 1170179 C CN1170179 C CN 1170179C CN B021599327 A CNB021599327 A CN B021599327A CN 02159932 A CN02159932 A CN 02159932A CN 1170179 C CN1170179 C CN 1170179C
- Authority
- CN
- China
- Prior art keywords
- port
- optical switch
- switch matrix
- photoswitch
- optical
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
- Optical Communication System (AREA)
Abstract
The present invention relates to an optical switch matrix which belongs to the technical field of optical communication, particularly to a switching matrix in an optical network. The present invention discloses the optical switch matrix which comprises n 1*n optical switches marked orderly and n 1*n couplers marked orderly. One port in n output ports of each 1*n coupler is selected as a lower path port; one port in n input ports of each 1*n optical switch is selected as an upper path port; residual n-1 output ports of the 1*n couplers marked with i are respectively connected with one unoccupied input port of n-1 1*n optical switches marked with j, wherein i=1, 2,..., n, j=1, 2,..., n, and i is not equal to j; input ports of the couplers and output ports of the optical switches are respectively the input ports and the output ports of the optical switch matrix. The present invention solves the requirement of realizing a broadcasting function on an optical domain, and simultaneously supports the functions of a flexible upper path and a flexible lower path.
Description
Technical field
A kind of optical switch matrix belongs to the optical communication technology field, particularly the switching matrix in the optical-fiber network.
Background technology
Optical-fiber network has been acknowledged as the infrastructure of communications field key through in a few years development.Optical-fiber network mainly is made up of optical switch matrix and wavelength-division multiplex technique.Wherein the function of optical switch matrix is on the light territory light signal to be carried out cross connection, perhaps dataway operation up and down.The kind of photoswitch is a lot of at present, and Fig. 1 is a kind of typical commercial n * n photoswitch principle assumption diagram, and this photoswitch is made up of two groups of n 1 * n photoswitches, and the photoswitch inner connecting way comprises that free space, optical fiber, waveguide etc. are several.The advantage of the photoswitch of the type is that it can realize the cross connect function of the strictly non-blocking of n * n; Its weak point is that it does not possess broadcast capability, and the method for electricity is mainly adopted in the realization of broadcast capability, and it does not also possess the function of road up and down of light signal simultaneously, and the function of road up and down of light signal realizes by developing corresponding module.
Functions such as the broadcasting of data service, CATV business, multicast require optical-fiber network to have corresponding broadcast capability.Owing to also do not support the optical switch matrix of broadcast capability at present, so optical-fiber network realizes that the mechanism of broadcast capability is very complicated.
Summary of the invention
The objective of the invention is to utilize simple in structure, cheap optical switch matrix on the light territory, to realize the requirement of broadcast capability, support flexibly the function on road up and down simultaneously.
The invention discloses a kind of optical switch matrix, n the 1 * n photoswitch that comprises sequence notation, it is characterized in that: this optical switch matrix also comprises n 1 * n coupling mechanism of sequence notation, each described 1 * n coupling mechanism all has an input port and n output port, each described 1 * n photoswitch all has n input port and an output port, and wherein n is the integer greater than 1;
Choose a port in n the output port of each 1 * n coupling mechanism arbitrarily as the following road port of local signal; Choose a port in n the input port of each 1 * n photoswitch arbitrarily as the last road port of local signal; N-1 the output port except that described down road port that is labeled as 1 * n coupling mechanism of i links to each other with a unappropriated input port of the individual 1 * n photoswitch of the n-1 that is labeled as j respectively, i=1 wherein, and 2 ..., n, j=1,2 ..., n, and i ≠ j;
The input port of a described n coupling mechanism and the output port of n photoswitch are respectively n input port and n output port of described optical switch matrix.
As the further improvement of optical switch matrix, j output port of i coupling mechanism is connected with i input port of j photoswitch, i=1 wherein, and 2 ..., n, j=1,2 ..., n, and i ≠ j; I output port of described i coupling mechanism and i input port of i photoswitch be respectively as the following road port and the last road port of local signal, i=1 wherein, and 2 ..., n.
In above-mentioned optical switch matrix, adopt waveguide to link to each other between described n 1 * n coupling mechanism and n the 1 * n photoswitch corresponding port, or adopt optical fiber continuous, or the employing free space.
The present invention is a novel optical switch matrix a kind of simple in structure, practical, cheap, has realized the requirement of broadcast capability on the light territory, has broadcasting and non-broadcast capability, supports flexibly road up and down simultaneously, has greatly expanded the range of application of optical switch matrix.
Description of drawings
Fig. 1 is typical commercial n * n optical switch matrix principle assumption diagram.
Fig. 2 is a principle assumption diagram of the present invention.
Fig. 3 is the principle assumption diagram of the embodiment of the invention.
Fig. 4 is the test result figure of the Power penalty of the embodiment of the invention.
Embodiment
Below in conjunction with description of drawings once embodiments of the invention and principle of work:
A kind of optical switch matrix that the present invention proposes is a n * n photoswitch with n input port and n output port, and wherein n is the integer greater than 1.
As shown in Figure 2, a kind of scheme of the present invention is: optical switch matrix comprises the photoswitch of coupling mechanism and the individual 1 * n of n of sequence notation of n the 1 * n of sequence notation.The input port of n coupling mechanism is as the input port of optical switch matrix, and the output port of n photoswitch is as the output port of optical switch matrix.
J output port of i coupling mechanism is connected with i input port of j photoswitch, i=1 wherein, and 2 ..., n, j=1,2 ..., n, and i ≠ j; I output port of i coupling mechanism and i input port of i photoswitch be respectively as the following road port and the last road port of local signal, i=1 wherein, and 2 ..., n.
Broadcast capability of the present invention realizes that principles illustrated is as follows: the input port 1 with optical switch matrix among Fig. 2 is the example explanation, light signal from input port 1 input of optical switch matrix, be divided into n output by first 1 * n coupling mechanism: the output port 1 of first 1 * n coupling mechanism is as the following road port of local signal, all the other output ports that are labeled as j link to each other with the input port 1 of j 1 * n photoswitch respectively, wherein j ≠ 1.If at this moment n-1 1 * n photoswitch all is configured to its input port 1 and links to each other with corresponding output port, then designed optical switch matrix has just been realized the 1st port input from optical switch matrix, and the broadcast state of identical output is all arranged at the 2nd to n output port of optical switch matrix.At this moment, the 1st output port of optical switch matrix need not the signal of the 1st input port, and this meets the on-the-spot requirement of using of optical node device.
Road function up and down of the present invention realizes that principle is as follows: as shown in Figure 2, n input signal links to each other with n input port of optical switch matrix respectively, owing to adopted coupling mechanism, so each input signal all has the following road port of local signal; Optical switch matrix has been arranged the last road port of n local signal simultaneously, and an input port with n 1 * n photoswitch links to each other respectively.This scheme has guaranteed that the user can choose suitable path channels up and down as required, is fit to very much the requirement of optical-fiber network dynamic wavelength route of future generation.
On the other hand, as shown in Figure 2, with the input port of above-mentioned optical switch matrix as output port, output port as input port, the connected mode of n photoswitch and n coupling mechanism is similar, road function about can realizing flexibly equally, but can't realize broadcast capability.
Shown in Figure 3 is one embodiment of the present of invention, i.e. the principle assumption diagram of 4 * 4 optical switch matrixes.In embodiments of the present invention, the ACWA104+1E NC that 1 * 4 coupling mechanism has adopted JDS company to produce, the SN12+107DUNC that 1 * 4 photoswitch adopts JDS company to produce, the input port of 4 coupling mechanisms is as the input port of 4 * 4 optical switch matrixes, and the output port of 4 photoswitches is as the output port of 4 * 4 optical switch matrixes.Standard single-mode fiber (SMF) is adopted in being connected between coupling mechanism and the switch, and connected mode is as follows:
J output port of i coupling mechanism is connected with i input port of j photoswitch, i=1 wherein, and 2 ..., 4, j=1,2 ..., 4, and i ≠ j; I output port of i coupling mechanism and i input port of i photoswitch be respectively as the following road port and the last road port of local signal, i=1 wherein, and 2 ..., 4.
The insertion loss that experiment records this 4 * 4 optical switch matrix is 7.2dB, PDL＜0.1dB, and switching time＜=5ms crosstalks＜40dB.Stability, reliability are guaranteed by the device that JDS company produces.
Utilize that 4 * 4 optical switch matrixes invented constitute have broadcasting, the optical node device of road function has passed through the test of network environment up and down, its Power penalty curve as shown in Figure 4: curve 1 represents that the judgment condition of Power penalty is the 10-12 bit error rate; Under the back-to-back condition of curve 2 expressions, the sensitivity curve of photoreceiver; After curve 3 expressions insert light device, the sensitivity curve of photoreceiver; As seen, the Power penalty of equipment satisfies relevant criterion less than 1.5dB.
In sum, optical switch matrix of the present invention has following advantage:
1, cross connect function.This is the function of present commercial photoswitch.
2, broadcast capability.This function has satisfied the requirement that digital signal, CATV signal transmit especially, has satisfied the needs of the metropolitan area optical network construction that is about to rise.
3, road function up and down.Utilize the signal port among the present invention, can realize the road up and down of arbitrary port signal neatly, satisfied the needs that following ASON (Automatically Switched Optical Network) dynamic routing is set up.
4, good stability, the reliability height.
Claims (3)
1. optical switch matrix, n the 1 * n photoswitch that comprises sequence notation, it is characterized in that: this optical switch matrix also comprises n 1 * n coupling mechanism of sequence notation, each described 1 * n coupling mechanism all has an input port and n output port, each described 1 * n photoswitch all has n input port and an output port, and wherein n is the integer greater than 1;
Choose a port in n the output port of each 1 * n coupling mechanism arbitrarily as the following road port of local signal; Choose a port in n the input port of each 1 * n photoswitch arbitrarily as the last road port of local signal; N-1 the output port except that described down road port that is labeled as 1 * n coupling mechanism of i links to each other with a unappropriated input port of the individual 1 * n photoswitch of the n-1 that is labeled as j respectively, i=1 wherein, and 2 ..., n, j=1,2 ..., n, and i ≠ j;
The input port of a described n coupling mechanism and the output port of n photoswitch are respectively n input port and n output port of described optical switch matrix.
2. optical switch matrix according to claim 1 is characterized in that: j output port of i coupling mechanism is connected with i input port of j photoswitch, i=1 wherein, and 2 ..., n, j=1,2 ..., n, and i ≠ j; I output port of described i coupling mechanism and i input port of i photoswitch be respectively as the following road port and the last road port of local signal, i=1 wherein, and 2 ..., n.
3. optical switch matrix according to claim 1 and 2 is characterized in that: adopt waveguide to link to each other between described n 1 * n coupling mechanism and n the 1 * n photoswitch corresponding port, or employing optical fiber is continuous.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021599327A CN1170179C (en) | 2002-12-30 | 2002-12-30 | Optical switch matrix |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021599327A CN1170179C (en) | 2002-12-30 | 2002-12-30 | Optical switch matrix |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1424600A CN1424600A (en) | 2003-06-18 |
| CN1170179C true CN1170179C (en) | 2004-10-06 |
Family
ID=4753361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021599327A Expired - Fee Related CN1170179C (en) | 2002-12-30 | 2002-12-30 | Optical switch matrix |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1170179C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107710042A (en) * | 2015-07-07 | 2018-02-16 | 华为技术有限公司 | Photoswitch with surface grating coupler and edge couplers |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006089452A1 (en) * | 2005-02-22 | 2006-08-31 | Zte Corporation | The equipment and system of switch matrix optical layer protection and corresponding wdm transmission system |
| CN108345068B (en) * | 2017-01-25 | 2020-01-17 | 华为技术有限公司 | Optical switch and optical switching system |
| CN108828724A (en) * | 2018-09-13 | 2018-11-16 | 中国电子科技集团公司第三十四研究所 | A kind of N × M optical switching matrix cascading mems optical switch |
-
2002
- 2002-12-30 CN CNB021599327A patent/CN1170179C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107710042A (en) * | 2015-07-07 | 2018-02-16 | 华为技术有限公司 | Photoswitch with surface grating coupler and edge couplers |
| CN107710042B (en) * | 2015-07-07 | 2020-01-10 | 华为技术有限公司 | Optical switch with surface grating coupler and edge coupler |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1424600A (en) | 2003-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6335992B1 (en) | Scalable optical cross-connect system and method transmitter/receiver protection | |
| Renaud et al. | Network and system concepts for optical packet switching | |
| CN1951051A (en) | WDM systems and methods | |
| CN1150514A (en) | Access network | |
| CN1435070A (en) | Four-fiber ring optical cross-connect system using 4*4 switch matrices | |
| CN1185820C (en) | NXN light exchanging structure in full photo exchanging nodal point | |
| CN1170179C (en) | Optical switch matrix | |
| CN1182733C (en) | Process for operating multistage NxN space-switching arrangement | |
| US6668106B1 (en) | Crosspoint microwave switching architecture for optical telecommunications | |
| JPH09506754A (en) | ATM system compatible 3-stage switching unit | |
| CN1231778C (en) | Constitution and control method for odd-port light switch matrix | |
| CN1157011C (en) | Multi-granularity light switch based on label | |
| Wosinska | Reliability study of fault-tolerant multiwavelength nonblocking optical cross connect based on InGaAsP/InP laser-amplifier gate-switch arrays | |
| CN100352187C (en) | Wavelength converter and optical cross-connect system using the same | |
| CN1119680C (en) | Single-fibre bidirectional optical split and complexer module | |
| CN1545820A (en) | Scalable, modular, strictly non-blocking electro-optical cross connect core | |
| CN1295394A (en) | Optical cross connection node for crossing between fiber link and wavelength groups | |
| CN2653792Y (en) | Full light wave long route cross module | |
| Hunter et al. | Architecture for large dilated optical TDM switching networks | |
| US20020091864A1 (en) | Ring network being installed as bus network | |
| Jajszczyk et al. | Tree-type photonic switching networks | |
| CN1423447A (en) | Classified exchange optical cross node structure based on information flow classifying model | |
| CN1231779C (en) | Constition and control method for light switch matrix with shielding purpose | |
| CN1207856C (en) | Node structure of light transmission network based on adjustable wavelength shifter and wavelength self-router | |
| Sabella | Tutorial: Key elements for WDM transport networks |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |