CN1374538A - Structure of matrix light shifter - Google Patents
Structure of matrix light shifter Download PDFInfo
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- CN1374538A CN1374538A CN 01109410 CN01109410A CN1374538A CN 1374538 A CN1374538 A CN 1374538A CN 01109410 CN01109410 CN 01109410 CN 01109410 A CN01109410 A CN 01109410A CN 1374538 A CN1374538 A CN 1374538A
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Abstract
In the matrix light shifter, there are stepped compensating structures separately in both the incident light side and the outgoing light side to compensate different light path. The light shifter for a NxN squared matrix has one stepped compensating structure of N-1 steps, and after being compensated the light path for each light route is 2N-1 units. Therefore, each light shifting route has homogeneous light attenuation during shifting.
Description
The present invention relates to an optical communication technique, particularly a kind of light shifter (opticalswitch), it has the feature of space compensation.
Along with the increase of optical communication load and wideband demand, how effectively management of wavelengths just becomes a stubborn problem.Light shifter is to be used for the key element of keyholed back plate wavelength and flow at present, the form of light shifter has a variety of, and wherein utilizing micro-electromechanical technology (Micro-Electro-Mechanical System Technology) to produce light shifter will be one of following possibility technology.How much frameworks that utilize micro-electromechanical technology to produce light shifter have a variety of, wherein are widely used most with the framework of matrix again.The light shifter of matrix type just was suggested as far back as 1986.The framework of traditional matrix type light shifter as shown in Figure 1.
In the mechanism of optical communication, general electronic signal, particularly digital electronic signal is converted into light signal, and light signal is by the optical fiber transmission.And light signal generally needs to exchange through light shifter will be delivered to another optical fiber the time.Among Fig. 1, an optical signal transmission element 14 can comprise an optical fiber 10 and gradually changed refractive index type lens 12 (Gradient-Index Lens, GRINLens).In addition the matrix type light shifter body matrix shown in dotted line, 4 * 4 matrix for example.The matrix type light shifter has a smooth emitting edge and a smooth outgoing limit, and some optical signal transmission elements 14 of its each matrix unit are arranged in regular turn, and invests numbering G1-G8.For example, optical signal transmission element G1-G4 be positioned at the light emitting edge, and optical signal transmission element G5-G8 is positioned at light outgoing limit among the figure.The light emitting edge is adjacent with light outgoing limit.In each rectangular cells of matrix, has a catoptron 20.With Fig. 1 is example, and it has 16 catoptrons 20.Catoptron 20 is liftable.General catoptron 20 is to be in down position, promptly is the OFF state.When incident light information will be when an optical signal transmission element 14 switches to another optical signal transmission element 14, a catoptron 20 of its correspondence can rise, and promptly is the ON state, with the light signal reflection, does 90 degree deviations.For example by the light signal of transfer element G1 incident, through (X3, Y1) catoptron 20 of ON state and be switched to transfer element G7.In addition, the light signal of transfer element G4 incident also can switch to transfer element G5 through different paths.
The matrix type light shifter of above-mentioned Fig. 1 is traditional arrangement, and the light path that its light signal is passed through in light shifter can be different different in size because of the path.Especially for example be, by the light path of transfer element G1, more than longer to the light path of transfer element G5 by transfer element G4 to transfer element G8.The optical loss that each light path is caused because of the light path difference can improve the complexity of system's keyholed back plate.
The light path of Fig. 1 is simplified to as shown in Figure 2 structure.In Fig. 2, when light switched, the light path of passing through therebetween was called operating distance (working distance) again.Light signal is passed through operating distance can loss, and when the transfer element 10+12 on quilt the right received, its light intensity that receives can be different.Shown in Figure 3ly being, is that the accurate value device of light (collimator) of 10mm is example with the operating distance, because of the variation of operating distance, and the optical loss variation that is produced.Curve by Fig. 3 finds out that obviously optical loss is obviously inconsistent.This also represents, in Fig. 1, and different paths, its light intensity that receives is also different.
Be set at a fixed value if will detect 0/1 critical value (Threshold), then its light intensity that detects has varying strength because of different paths, will improve the generation of the bit error rate.If with critical value setting is variable mode, it can increase the complicacy of system.Therefore optical loss is inconsistent is a suitable stubborn problem for whole communication system, but also can't solve the inconsistent problem of optical loss even install the modulation attenuator additional at outlet optical fiber place, because may advancing G5 by G1, light signal goes out, also may advance G5 and go out, also can't effectively solve the above problems even therefore install attenuator additional in the G5 exit by G2.
In view of this, the invention provides a kind of structure of matrix light shifter, have a staged collocation structure respectively at light emitting edge and light outgoing limit, to compensate the light path in different paths.Light shifter.For the square matrix of one N * N, its staged collocation structure is the ladder on N-1 rank, and light path through the compensation after, the light path of each light toggle path is a 2N-1 elementary cell.When switching, each light toggle path has uniform light path light path and damping capacity.
Above-mentioned staged collocation structure is also applicable to two-way light shifter structure, and it comprises that a plurality of rectangular cells constitute an array formula body, and wherein this body has one first symmetrical limit and one second limit.Be positioned at some rectangular elements on first limit and second limit, constitute a ladder structure.Comprise a plurality of liftable catoptrons in addition again, be positioned at the rectangular element of a part, the optical information by an emitting edge incident can be reflexed to an outgoing limit, wherein emitting edge be its first limit and second limit thereof the two one of, and the outgoing limit is an opposite side of emitting edge.
The present invention provides a kind of matrix light shifter optical range compensating method in addition, and comprising provides a matrix light shifter body, and it constitutes one N * N matrix by a plurality of rectangular cells.The light shifter body has adjacent light input limit and light output limit.Then, compensation is by the light path of light input limit to light output limit.Wherein some rectangular cells with the folded center line in light input limit and light output limit are a benchmark, export the direction on limit to light input limit with light, compensate light path and make and respectively has N rectangular cells.And each this light path has 2N-1 rectangular cells altogether.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. is described in detail below:
The drawing explanation:
Fig. 1 is a classical matrix type light shifter;
Fig. 2 is a path of a light shifter and the relation of operating distance;
Fig. 3 is the change curve of an optical loss with operating distance;
Fig. 4 a is according to the present invention, a unidirectional light shifter;
Fig. 4 b is according to the present invention, a two-way light shifter.
Description of reference numerals;
10 optical fiber
12 gradually changed refractive index type lens (Gradient-Index Lens)
14 optical signal transmission elements
20 catoptrons
31,32,33,34 staged light collocation structures
Embodiment:
One of feature of the present invention is to utilize the light collocation structure of a staged, and it is isometric to make that the light path in each path is all, so optical loss has a stationary value.
The present invention is directed to the front, traditional structure shown in Figure 1, the problem of its generation proposes suitable optical range compensating method.Fig. 4 a is according to the present invention, a unidirectional light shifter.The matrix structure of dotted portion as hereinbefore, it has a smooth emitting edge and a smooth outgoing limit.For example by transfer element G2 to the light path shown in the transfer element G7, it is through a mirror reflects deviation.
And framework is on the matrix structure light shifter, and the light collocation structure 31 that the present invention proposes a staged is positioned at the light emitting edge of matrix structure, and light collocation structure 32 is positioned at the light outgoing limit of matrix structure.With regard to regard to the body of N * N matrix structure, light collocation structure 31,32 is the staircase structure on N-1 rank.The position of its high-order is contiguous mutually, by (X1, unit Y4) is to external compensation.Because the light collocation structure lacks single order than N, transfer element G1 and G8 still be located in the matrix structure body (X1, Y1) and (X4 is Y4) on the rectangular cells.Therefore after compensation, the total optical path of each light path is 2N-1 unit.This makes the optical loss of each light path that one stationary value be arranged.Light shifter of the present invention like this can be avoided causing because of the path difference, produces the deviation (bias) of light intensity.
According to the compensation principle that identical the invention described above proposes, it is also applicable to two-way light shifter.Fig. 4 b is according to the present invention, a two-way light shifter.In Fig. 4 b, but catoptron 20 has the function of double-sided reflecting, for example when catoptron 20 in that (X3, when Y2) rising, it can reflex to the light signal by transfer element G2 input on the transfer element G7.This moment, catoptron 20 also can for example reflex to the light signal by transfer element G11 input on the transfer element G15.Otherwise, also the light signal by transfer element G15 input can being reflexed on the transfer element G11, its path is identical, only is the difference of transmission direction.
In order to compensate the light path of light path, two other light collocation structure 33,34 also be seated in the Y1 row with X4 capable on.Its principle is still kept, and makes the total optical path that obtains 2N-1.Therefore by another angle, the principle of light compensation is exactly, so that (X1 arrives Y4) that (X4, unit, oblique angle Y1) make two direction that the unit of number all be arranged etc.With among Fig. 4 b (X3, Y2), its both sides through the compensation after three unit are all arranged.Therefore the total optical path of each light path all has seven unit.
If not with the body of N * N matrix structure, light shifter of the present invention can be considered an array body that is made of some rectangular cells in addition.Shown in Fig. 4 b, this array body has two symmetrical opposite side, is positioned at the rectangular cells on two opposite side, constitutes a ladder structure.Transfer element places on the rectangular cells on both sides.At this moment, the position of catoptron only is arranged on some rectangular cells, makes transfer element be able to mutual communication.The position of catoptron can be selected according to the requirement in the design.Light shifter of the present invention, the light path that permission is set up has identical light path.
Therefore the present invention utilizes a ladder structure, compensates the light path in light shifter, makes each light path that identical light path all be arranged.This makes has a stationary value by the optical loss of light signal in light shifter.The light intensity of light signal can not have difference because of the different rows inbound path.
Light compensation staircase structure of the present invention in fact is a space compensation, with regard to regard to the viewpoint of method, as long as transfer element is suitably increased light path according to mentioned above principle.
The present invention cooperates traditional N * N matrix light shifter, utilizes the staged collocation structure on two N-1 rank, does not need can reach through the process of complexity the feature of identical light path.
In sum, though the present invention is with a preferred embodiment openly as above, so it is not that any heat is practised the technician of this technology in order to qualification the present invention, without departing from the spirit and scope of the present invention, and when doing various renewals and improvement.But protection scope of the present invention should be as the criterion with claims restricted portion.
Claims (17)
1. structure of matrix light shifter, it is characterized in that: it comprises:
One N rank matrix switcher body, it has a smooth emitting edge, and a contiguous smooth outgoing limit;
One first staircase structure has the N-I rank, is positioned at this light emitting edge, and one of this first staircase structure high-order wherein is positioned at a corner of this N rank matrix switcher body;
One second staircase structure has the N-1 rank, is positioned at this light outgoing limit, and wherein one of this second staircase structure high-order also is positioned at this corner.
2. structure of matrix light shifter according to claim 1, it is characterized in that: it also comprises: a plurality of optics output/input elements, be positioned at each rank of this first staircase structure and this second staircase structure, and on this switch body that is not capped on this light emitting edge and this light outgoing limit.
3. structure of matrix light shifter according to claim 1, it is characterized in that: by this light emitting edge each light switching light path to this light outgoing limit, through the compensation of this first staircase structure and this second staircase structure, it is 2N-1 unit that this each light switches light path.
4. structure of matrix light shifter according to claim 1 is characterized in that: this switch body comprises a catoptron, the incident light by this light emitting edge can be reflexed to this light outgoing limit.
5. two-way structure of matrix light shifter, it is characterized in that: it comprises:
One N rank matrix switcher body, one first smooth emitting edge, one second smooth outgoing limit, one second smooth emitting edge and one first smooth outgoing limit are arranged in regular turn, wherein this first smooth emitting edge is adjacent in one first corner with this first smooth outgoing limit, and this second smooth emitting edge is adjacent in one second corner with this second smooth outgoing limit;
One first staircase structure, one second staircase structure, one the 3rd staircase structure, and a four-step structure, respectively have the N-1 rank, be positioned at this first smooth emitting edge in regular turn, this second smooth outgoing limit, this second smooth emitting edge and this first smooth outgoing limit, wherein the high-order of this first staircase structure and this four-step structure is contiguous mutually in this first corner, and the high-order of this first staircase structure and the 3rd staircase structure is contiguous mutually in this second corner.
6. two-way structure of matrix light shifter according to claim 5, it is characterized in that: it also comprises: a plurality of optics output/input elements, be positioned at each rank of this first staircase structure, this second staircase structure, the 3rd staircase structure and this four-step structure, and on this switch body that is not capped.
7. two-way structure of matrix light shifter according to claim 5 is characterized in that: it is 2N-1 unit that each light of being set up switches light path.
8. two-way structure of matrix light shifter according to claim 5, it is characterized in that: this switch body comprises a catoptron, can with by this first smooth emitting edge and this second smooth emitting edge the two one of an incident light of incident, reflex to this first smooth outgoing limit and this second smooth outgoing limit.
9. two-way structure of matrix light shifter, it is characterized in that: it comprises:
One N rank matrix switcher body, one first smooth emitting edge, one second smooth emitting edge, one second smooth outgoing limit and one first smooth outgoing limit are arranged in regular turn, wherein this first smooth emitting edge is adjacent in one first corner with this first smooth outgoing limit, and this second smooth emitting edge is adjacent in one second corner with this second smooth outgoing limit;
One first staircase structure, one second staircase structure, one the 3rd staircase structure and a four-step structure, respectively have the N-I rank, be positioned at this first smooth emitting edge, this second smooth emitting edge, this second smooth outgoing limit and this first smooth outgoing limit in regular turn, wherein the high-order of this first staircase structure and this four-step structure is contiguous mutually in this first corner, and the high-order of this first staircase structure and the 3rd staircase structure is contiguous mutually in this second corner.
10. two-way structure of matrix light shifter according to claim 9, it is characterized in that: it also comprises: a plurality of optics output/input elements, be positioned at each rank of this first staircase structure, this second staircase structure, the 3rd staircase structure and this four-step structure, and on this switch body that is not capped.
11. two-way structure of matrix light shifter according to claim 9 is characterized in that: it is 2N-1 unit that each light of being set up switches light path.
12. two-way structure of matrix light shifter according to claim 9, it is characterized in that: this switch body comprises a catoptron, can with by this first smooth emitting edge and this second smooth emitting edge the two one of an incident light of incident, reflex to this first smooth outgoing limit and this second smooth outgoing limit.
13. a light shifter structure, it is characterized in that: it comprises:
A plurality of rectangular cells constitute an array body, and wherein this array body has one first symmetrical limit and one second limit, is positioned at these rectangular cells on this first limit and this second limit, constitutes a ladder structure;
A plurality of liftable catoptrons are positioned at these rectangular elements of a part, the optical information by an emitting edge incident can be reflexed to an outgoing limit, wherein this emitting edge be this first limit and this second limit the two one of, and this outgoing limit is an opposite side of this emitting edge.
14. light shifter structure according to claim 13 is characterized in that: these catoptrons are an one-way mirror.
15. light shifter structure according to claim 13 is characterized in that: these catoptrons are a two-way catoptron.
16. light shifter structure according to claim 13 is characterized in that: this staircase structure is a N staircase structure, and formed each switching light path has N these rectangular elements.
17. a matrix light shifter optical range compensating method, this optical range compensating method comprises:
One matrix light shifter body is provided, it constitutes one N * N matrix by a plurality of rectangular cells, this light shifter body has adjacent light input limit and light output limit, and compensation is by the light path of this light input limit to the light output limit, it is characterized in that: these rectangular cells with this light input limit and the folded center line in light output limit are a benchmark, direction to this light input limit and light output limit, compensate this light path, make respectively to have N rectangular cells, and each this light path has the 2N-1 rectangular cells altogether.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 01109410 CN1374538A (en) | 2001-03-08 | 2001-03-08 | Structure of matrix light shifter |
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| CN 01109410 CN1374538A (en) | 2001-03-08 | 2001-03-08 | Structure of matrix light shifter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113533353A (en) * | 2021-08-20 | 2021-10-22 | 合肥御微半导体技术有限公司 | Defect detection device and defect detection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113533353A (en) * | 2021-08-20 | 2021-10-22 | 合肥御微半导体技术有限公司 | Defect detection device and defect detection method |
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