CN101888280A - Wavelength selecting device and method as well as wavelength multiplexing equipment - Google Patents
Wavelength selecting device and method as well as wavelength multiplexing equipment Download PDFInfo
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- CN101888280A CN101888280A CN2009100839824A CN200910083982A CN101888280A CN 101888280 A CN101888280 A CN 101888280A CN 2009100839824 A CN2009100839824 A CN 2009100839824A CN 200910083982 A CN200910083982 A CN 200910083982A CN 101888280 A CN101888280 A CN 101888280A
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Abstract
The embodiment of the invention relates to wavelength selecting device and method as well as wavelength multiplexing equipment. The wavelength selecting device comprises a diffracting unit, a redirecting unit, a liquid crystal unit group and a refracting unit, wherein the diffracting unit is used for resolving incident light into subchannel light beams with different central wavelengths; the redirecting unit is used for redirecting the subchannel light beams into subparallel subchannel light beams; the liquid crystal unit group comprises at least one liquid crystal unit and is used for selectively changing a polarization state of the subparallel subchannel light beams; and the refracting unit is used for projecting the subchannel light beams transmitting the liquid crystal unit to different emergent ports according to the change of the polarization state. The wavelength selecting device and method as well as the wavelength multiplexing equipment provided by the embodiment of the invention simplify the structure of a wavelength selecting light path system, and a light path formed by the liquid crystal unit and the refracting unit is beneficial to the expansion upgrading of the whole light path system.
Description
Technical field
The embodiment of the invention relates to communication technical field, especially a kind of wavelength selection system and method, wavelength multiplexing equipment.
Background technology
Along with the development of optical-fiber network technology, (Reconfigurable Optical Add-Drop Multiplexer ROADM) has become the sharp weapon of systems provider in metropolitan area optical network market to Reconfigurable Optical Add/drop Multiplexer.In ROADM, the light switching technology is the technology of its core, and (Wavelength Select Switch WSS) is present more common light switching technology, also is development in recent years ROADM subsystem rapidly and wavelength is selected interchanger.Because WSS adopts the free space optical switching technology, though the road wave number is supported higher dimension less up and down, can support that integrated parts are more, so become ROADM one preferred technique more than 4 dimensions gradually based on the ROADM of WSS.
The inventor finds in implementing process of the present invention, there is following defective at least in the WSS of prior art: because the complex structure of WSS medium wavelength selected cell, cause the number of wavelength selection unit to be difficult to expansion, thereby be unfavorable for that light path system upgrades to more high-dimensional expansion.
Summary of the invention
The object of the present invention is to provide a kind of wavelength selection system and method, wavelength multiplexing equipment, simple in structure, be beneficial to the expansion upgrading of light path system.
The embodiment of the invention provides a kind of wavelength selection system, comprising:
Diffraction element is used for incident light is resolved into the subchannel light beam of different centre wavelengths;
Be redirected the unit, being used for described subchannel light beam is redirected is subparallel subchannel light beam;
The liquid crystal cells group comprises at least one liquid crystal cells, is used for optionally changing the polarization state of described subparallel subchannel light beam;
The refraction unit is used for the variation according to described polarization state, will be projected to different exit ports through the subchannel light beam of described liquid crystal cells.
Above-mentioned wavelength selection system, by the polarization state that liquid crystal cells optionally changes subparallel subchannel light beam is set, and by be provided with the refraction unit subchannel light beam is projected to different exit ports, make multichannel light wave multiplexed signals be separated into different light beams, simplified the structure of optical wavelength selection system, and the formed light path of liquid crystal cells and refraction unit is beneficial to the expansion upgrading of whole optical path system.
The embodiment of the invention also provides a kind of Wavelength selecting method, comprising:
Incident light is resolved into the subchannel light beam of different centre wavelengths;
It is subparallel subchannel light beam that described subchannel light beam is redirected;
Optionally change the polarization state of described subparallel subchannel light beam;
Variation according to described polarization state is projected to different exit ports with described subparallel subchannel light beam.
Above-mentioned Wavelength selecting method, by optionally changing the polarization state of subparallel subchannel light beam, and by the subchannel light beam is projected to different exit ports, make multichannel light wave multiplexed signals be separated into different light beams, simplified the structure of optical wavelength selection system, and the formed light path of liquid crystal cells and refraction unit is beneficial to the expansion upgrading of whole optical path system.
The embodiment of the invention also provides a kind of wavelength multiplexing equipment, comprising: the wavelength selection system in polarization converter, incident exit ports and the technique scheme;
Described polarization converter is used for unified multi-wavelength multiplex polarization state of light, and described multi-wavelength multiplex polarization state of light is restored to described incident exit ports in outgoing;
Described wavelength selection system, be used for described multi-wavelength multiplex photolysis is become the subchannel light beam of different centre wavelengths, by optionally changing the polarization state of described subparallel subchannel light beam, described subchannel light beam is converged the multi-wavelength multiplex light that closes the formation of bundle back be emitted to described polarization converter;
Described incident exit ports is used to receive described subchannel light beam and converges and close the multi-wavelength multiplex light that the bundle back forms, and penetrates the described multi-wavelength multiplex light that closes behind the bundle that converges.
Above-mentioned wavelength multiplexing equipment, by the polarization state that wavelength selection system optionally changes subparallel subchannel light beam is set, and by the subchannel light beam is projected to different exit ports, make multichannel light wave multiplexed signals be separated into different light beams, simplified the structure of optical wavelength selection system, and the formed light path of liquid crystal cells and refraction unit is beneficial to the expansion upgrading of whole optical path system.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art 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.
Fig. 1 is the light channel structure vertical view of an embodiment of wavelength selection system of the present invention;
Fig. 2 is a light channel structure left view embodiment illustrated in fig. 1;
Fig. 3 is a 3-D solid structure schematic diagram embodiment illustrated in fig. 1;
Fig. 4 is the 3-D solid structure schematic diagram of another embodiment of wavelength selection system of the present invention;
Fig. 5 is be reflected direction of propagation schematic diagram after module 443 reflection of subchannel light beam shown in Figure 4;
Fig. 6 is the 3-D solid structure schematic diagram of another embodiment of wavelength selection system of the present invention;
Fig. 7 is the 3-D solid structure schematic diagram of another embodiment of wavelength selection system of the present invention;
Fig. 8 is the light channel structure vertical view of another embodiment of wavelength selection system of the present invention;
Fig. 9 is a light channel structure left view embodiment illustrated in fig. 8;
Figure 10 is a 3-D solid structure schematic diagram embodiment illustrated in fig. 8;
Figure 11 is the schematic flow sheet of an embodiment of Wavelength selecting method of the present invention;
Figure 12 is the schematic flow sheet of another embodiment of Wavelength selecting method of the present invention;
Figure 13 is the structural representation of an embodiment of wavelength multiplexing equipment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, the every other embodiment that those of ordinary skills are obtained under the prerequisite of not making creative work belongs to the scope of protection of the invention.
For common natural daylight, can equivalence regard two mutual vertical and separate p components and s component as, and satisfy: the vibration of the vibration of p component and s component has equal amplitude, and the vibration of the vibration of p component and s component does not have fixed phase relation.The embodiment of the invention for the sake of simplicity, the polarization state that only comprises the subchannel light beam of p component is called the p attitude, the polarization state that only comprises the subchannel light beam of s component is called the s attitude, with the subchannel light beam of " ↑ " expression p attitude, with the subchannel light beam of " zero " expression s attitude.In addition,, light beam can not be resolved into completely parallel light beam in the perfect condition in the reality, so the subchannel light beam of the embodiment of the invention alleged " closely parallel " is meant the subchannel light beam of " approximate parallel or parallel " because the precision of optical device is higher.
Fig. 1 is the light channel structure vertical view of an embodiment of wavelength selection system of the present invention, Fig. 2 is a light channel structure left view embodiment illustrated in fig. 1, Fig. 3 is a 3-D solid structure schematic diagram embodiment illustrated in fig. 1, as Fig. 1～shown in Figure 3, present embodiment comprises: diffraction element 11, be redirected unit 12, liquid crystal cells 13, refraction unit 14.Liquid crystal cells group in the present embodiment only comprises a liquid crystal cells.
Wherein, diffraction element 11 resolves into incident light the subchannel light beam of different centre wavelengths; The subchannel light beam that redirected unit 12 decomposes diffraction element 11 is redirected and is subparallel subchannel light beam; Liquid crystal cells 13 optionally changes the polarization state that is redirected the subparallel subchannel light beam that is redirected unit 12; Refraction unit 14 will be projected to different exit ports through the subchannel light beam of liquid crystal cells 13 according to the variation of polarization state.
The wavelength selection system that the embodiment of the invention provides, by the polarization state that liquid crystal cells 13 optionally changes the subchannel light beam is set, and, refraction unit 14 will be projected to different exit ports from the subchannel light beam of liquid crystal cells 13 emission by being set, make multichannel light wave multiplexed signals be separated into different light beams, simplified the structure of optical wavelength selection system, and liquid crystal cells 13 is upgraded with the expansion that refraction unit 14 formed light paths are beneficial to the whole optical path system.
Fig. 4 is the 3-D solid structure schematic diagram of another embodiment of wavelength selection system of the present invention, Fig. 5 is be reflected direction of propagation schematic diagram after module 443 reflection of subchannel light beam shown in Figure 4, as Fig. 4, shown in Figure 5, on the basis of above-mentioned Fig. 1～embodiment illustrated in fig. 3, refraction unit 44 specifically comprises: the first polarised light spectral module 441, the second polarised light spectral module 442, reflecting module 443.
Wherein, diffraction element 41 resolves into incident light the subchannel light beam of different centre wavelengths; The subchannel light beam that redirected unit 42 decomposes diffraction element 41 is redirected and is subparallel subchannel light beam; Liquid crystal cells 43 optionally changes the polarization state that is redirected the subparallel subchannel light beam that is redirected unit 42; The subchannel refraction of optical beam that the first polarised light spectral module 441 has changed polarization state is transmitted through the second polarised light spectral module 442 to reflecting module 443 with the unaltered subchannel light beam of polarization state; The second polarised light spectral module 442 with the unaltered subchannel beam reflection of polarization state to reflecting module 443; Because the subchannel light beam is launched into the diverse location place of reflecting module 443, so reflecting module 443 can be projected to the subchannel light beam different exit ports.
As shown in Figure 5, polarization state shown in " ↑ " is that polarization state shown in subchannel light beam and " zero " of p attitude is the differing heights place that the subchannel light beam of s attitude is positioned at reflecting module 443, makes reflecting module 443 the subchannel light beam at differing heights place can be projected to different exit ports.
The wavelength selection system that the embodiment of the invention provides, by the subchannel refraction of optical beam that the first polarised light spectral module 441 changed polarization state being set to reflecting module 443, and be provided with the second polarised light spectral module 442 with the unaltered subchannel beam reflection of polarization state to reflecting module 443, because the subchannel light beam is reflected to the diverse location place of reflecting module 443, the subchannel light beam is separated from each other, reflecting module 443 is projected to different exit ports with the subchannel light beam, simplified the structure of optical wavelength selection system, and liquid crystal cells 43 is upgraded with the expansion that refraction unit 44 formed light paths are beneficial to the whole optical path system.
Fig. 6 is the 3-D solid structure schematic diagram of another embodiment of wavelength selection system of the present invention, as shown in Figure 6, on above-mentioned basis embodiment illustrated in fig. 4, two reflecting module 643 are set, correspond respectively to the first polarised light spectral module 641 and the second polarised light spectral module 642.
Wherein, diffraction element 61 resolves into incident light the subchannel light beam of different centre wavelengths; The subchannel light beam that redirected unit 62 decomposes diffraction element 61 is redirected and is subparallel subchannel light beam; Liquid crystal cells 63 optionally changes the polarization state that is redirected the subparallel subchannel light beam that is redirected unit 62; The subchannel refraction of optical beam that the first polarised light spectral module 641 has changed polarization state is transmitted through the second polarised light spectral module 642 to reflecting module 643 with the unaltered subchannel light beam of polarization state; The second polarised light spectral module 642 with the unaltered subchannel beam reflection of polarization state to another reflecting module corresponding 643 with it; Because the subchannel light beam is launched into two separate reflecting module 643, and the position difference of two reflecting module 643, therefore two separate reflecting module 643 are projected to different exit ports with the subchannel light beam.
The wavelength selection system that the embodiment of the invention provides, by independently reflecting module 643 is set, can further adjust the position of each subchannel light beam by the position of adjusting separate reflecting module 643 at exit ports, realize that the subchannel light beam is separated from each other, improved the flexibility of optical wavelength selection system configuration, and liquid crystal cells 63 and the first polarised light spectral module, 641 formed light paths are beneficial to the expansion upgrading of whole optical path system.
Fig. 7 is the 3-D solid structure schematic diagram of another embodiment of wavelength selection system of the present invention, as shown in Figure 7, on above-mentioned basis embodiment illustrated in fig. 6, liquid crystal cells 73 optionally changes the polarization state that is redirected the subparallel subchannel light beam that is redirected unit 72, the subchannel refraction of optical beam that the first polarised light spectral module 741 has changed polarization state is transmitted through the second polarised light spectral module 742 to reflecting module 743 with the unaltered subchannel light beam of polarization state; The second polarised light spectral module 742 with the unaltered subchannel beam reflection of polarization state to another reflecting module corresponding 743 with it; Because the subchannel light beam is launched into two separate reflecting module 743, and the height and position difference of two reflecting module 743, therefore two separate reflecting module 743 are projected to different exit ports with the subchannel light beam.
Further, the subchannel light beam is reflected onto through reflecting module 743 and is redirected unit 72, be redirected unit 72 and will converge to diffraction element 71 from the subchannel light beam of same reflecting module 743 reflections, diffraction element 71 is closed bundle with the subchannel light beam, forms two separate subchannel light beams at diffraction element 71 places.
The wavelength selection system that the embodiment of the invention provides by recycling diffraction element 71 and redirected unit 72, realizes that the subchannel light beam is separated from each other and is emitted to different exit ports, has saved the hardware cost of whole optical path system.
Fig. 8 is the light channel structure vertical view of another embodiment of wavelength selection system of the present invention, Fig. 9 is a light channel structure left view embodiment illustrated in fig. 8, Figure 10 is a 3-D solid structure schematic diagram embodiment illustrated in fig. 8, as Fig. 8～shown in Figure 10, on the basis of above-mentioned Fig. 1～embodiment illustrated in fig. 3, have two liquid crystal cells 83, two first polarised light spectral modules 841, three reflecting module 843.Liquid crystal cells group in the present embodiment comprises two liquid crystal cells.
Wherein, diffraction element 81 resolves into incident light the subchannel light beam of different centre wavelengths; The subchannel light beam that redirected unit 82 decomposes diffraction element 81 is redirected and is subparallel subchannel light beam; Liquid crystal cells 83 optionally changes the polarization state that is redirected the subparallel subchannel light beam that is redirected unit 82; The subchannel refraction of optical beam that the first polarised light spectral module 841 has changed polarization state is transmitted through the second polarised light spectral module 842 to reflecting module 843 corresponding with it with the unaltered subchannel light beam of polarization state; The second polarised light spectral module 842 with the unaltered subchannel beam reflection of polarization state to reflecting module 843 corresponding with it; Because the subchannel light beam is launched into different reflecting module 843, and the height difference of each reflecting module 843, so the reflecting module 843 at differing heights place can be projected to different exit ports with each subchannel light beam.
The wavelength selection system that the embodiment of the invention provides, by two liquid crystal cells 83 and two first polarised light spectral modules 841 are set, make multichannel subchannel light beam optionally change polarization state, three highly different reflecting module 843 are divided into three different height and positions with multichannel subchannel light beam, make multichannel subchannel light beam to be projected to three different exit ports by three different reflecting module 843, realize that the subchannel light beam is separated from each other, improved the flexibility of optical wavelength selection system configuration, and liquid crystal cells 83 and the first polarised light spectral module, 841 formed light paths are beneficial to the expansion upgrading of whole optical path system.
Alternatively, three separate reflecting module 843 also can be integrated into a reflecting module, make the first polarised light spectral module 841 the subchannel light beam be projected the differing heights place of reflecting module, thereby the subchannel light beam is projected different exit ports, further save the hardware cost of whole optical path system.
On the basis of the foregoing description, in order to satisfy the needs of high-dimensional exit ports, can be by increasing the number of the liquid crystal cells and the first polarised light spectral module, and the number of corresponding increase reflecting module, and the liquid crystal cells and the first polarised light spectral module are arranged alternately, realize the expansion upgrading of whole optical path system.
Further, on the basis of the foregoing description, the first polarised light spectral module 841 can be polarised light splitter; Reflecting module 843 can be speculum or prism; The second polarised light spectral module 842 can be polarised light splitter or speculum or prism, and preferably, the second polarised light spectral module 842 can reduce the hardware cost of whole optical path system when being speculum or prism.
Preferably, among above-mentioned Fig. 1～embodiment illustrated in fig. 10, diffraction element can be diffraction grating or diffraction grating group, if diffraction grating group, the passage of the way up and down light beam in then embodiment illustrated in fig. 7 are incident upon respectively in the diffraction grating group and way passage light beam up and down respectively on the corresponding diffraction grating; In order to make the subchannel light beam can be near desirable collimated light beam behind the unit through being redirected, redirected unit can be lens or set of lenses, and diffraction element is positioned at the place, focal plane of lens or set of lenses; Liquid crystal cells is the liquid crystal array group, the liquid crystal array group is with corresponding from the subchannel light beam that is redirected the unit emission, by the open and close of control with the corresponding liquid crystal array group of subchannel light beam, make the polarization state of subchannel light beam change or remain unchanged, realize optionally changing the polarization state of subchannel light beam.
Figure 11 is the schematic flow sheet of an embodiment of Wavelength selecting method of the present invention, and Fig. 1～wavelength selection system embodiment shown in Figure 10 can realize the flow process of the embodiment of the invention, and as shown in figure 11, present embodiment may further comprise the steps:
The Wavelength selecting method that the embodiment of the invention provides, by optionally changing the polarization state of subchannel light beam, and the subchannel light beam is projected to different exit ports, make multichannel light wave multiplexed signals be separated into different light beams, simplify the structure of optical wavelength selection system, helped the expansion upgrading of whole optical path system.
Figure 12 is the schematic flow sheet of another embodiment of Wavelength selecting method of the present invention, and Fig. 1～wavelength selection system embodiment shown in Figure 10 can realize the flow process of the embodiment of the invention, and as shown in figure 12, present embodiment may further comprise the steps:
In the above-mentioned steps 123, can make the polarization state of the subchannel light beam that is parallel to each other change or remain unchanged by the open and close of control and the corresponding liquid crystal array group of subchannel light beam.
The Wavelength selecting method that the embodiment of the invention provides, open and close by control and the corresponding liquid crystal array group of subchannel light beam make the polarization state of the subchannel light beam that is parallel to each other change or remain unchanged, realize optionally changing the polarization state of subchannel light beam, by being converged again by diffraction element, the subchannel light beam closes bundle, make multichannel light wave multiplexed signals be separated into different light beams, simplify the structure of optical wavelength selection system, helped the expansion upgrading of whole optical path system.
Figure 13 is the structural representation of an embodiment of wavelength multiplexing equipment of the present invention, and as shown in figure 13, the wavelength multiplexing equipment in the present embodiment comprises: polarization converter 131, incident exit ports 132 and wavelength selection system 133; Wherein, the wavelength selection system in the present embodiment can be the wavelength selection system among above-mentioned Fig. 1～embodiment illustrated in fig. 10.
Polarization converter 131 unified multi-wavelength multiplex polarization state of light; Wavelength selection system 133 becomes the multi-wavelength multiplex photolysis subchannel light beam of different centre wavelengths, by optionally changing the polarization state of subparallel subchannel light beam, the subchannel light beam is converged the multi-wavelength multiplex light that closes the formation of bundle back be emitted to polarization converter 131, polarization converter 131 will converge the multi-wavelength multiplex polarization state of light of closing behind the bundle and restore, and it is emitted to incident exit ports 132, converge the multi-wavelength multiplex light that closes behind the bundle from 132 outgoing of incident exit ports.
The wavelength multiplexing equipment that the embodiment of the invention provides, by the polarization state that wavelength selection system 133 optionally changes subparallel subchannel light beam is set, and by the subchannel light beam is projected to different exit ports, make multichannel light wave multiplexed signals be separated into different light beams, simplified the structure of wavelength multiplexing light path system, and the formed light path of liquid crystal cells and refraction unit is beneficial to the expansion upgrading of whole optical path system.
On the basis of the foregoing description, wavelength selection system 133 comprises: diffraction element, redirected unit, liquid crystal cells, refraction unit.
Wherein diffraction element resolves into incident light the subchannel light beam of different centre wavelengths; Redirected unit is redirected the subchannel light beam and is subparallel subchannel light beam; Liquid crystal cells optionally changes the polarization state of subparallel subchannel light beam; The refraction unit will be projected to different exit ports through the subchannel light beam of described liquid crystal cells according to the variation of polarization state.
The wavelength multiplexing equipment that the embodiment of the invention provides, by liquid crystal cells and refraction unit are set, realize optionally changing the polarization state of subparallel subchannel light beam, and by the subchannel light beam is projected to different exit ports, make multichannel light wave multiplexed signals be separated into different light beams, simplified the structure of wavelength multiplexing light path system, and the formed light path of liquid crystal cells and refraction unit is beneficial to the expansion upgrading of whole optical path system.
In the invention described above embodiment, incident light can be through the unified multi-wavelength multiplex light of polarization state behind the polarization converter, also can be without the skimble-scamble multi-wavelength multiplex light of the polarization state of polarization converter, in concrete enforcement, can change the polarization state of subchannel light beam by the control and the variation of the corresponding liquid crystal cells internal structure of subchannel light beam.The embodiment of the invention only for convenience of description, the unification of polarization of incident light attitude is the p attitude shown in " ↑ ", the polarization of incident light attitude also can be selected according to actual needs, as long as liquid crystal cells in the embodiment of the invention and refraction unit are carried out suitable control, make the subchannel light beam be projected to different exit ports, be the described technical scheme of the invention described above embodiment according to the condition of setting.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a wavelength selection system is characterized in that, comprising:
Diffraction element is used for incident light is resolved into the subchannel light beam of different centre wavelengths;
Be redirected the unit, being used for described subchannel light beam is redirected is subparallel subchannel light beam;
The liquid crystal cells group comprises at least one liquid crystal cells, is used for optionally changing the polarization state of described subparallel subchannel light beam;
The refraction unit is used for the variation according to described polarization state, will be projected to different exit ports through the subchannel light beam of described liquid crystal cells.
2. device according to claim 1 is characterized in that, described refraction unit comprises: the first polarised light spectral module, reflecting module and the second polarised light spectral module;
The described first polarised light spectral module, the subchannel beam reflection that is used for described polarization state has been changed is transmitted through the described second polarised light spectral module to described reflecting module with the unaltered subchannel light beam of described polarization state;
The described second polarised light spectral module is used for the unaltered subchannel refraction of optical beam of described polarization state to described reflecting module;
Described reflecting module is used for described subchannel light beam is projected to different exit ports.
3. device according to claim 2 is characterized in that, the number of described liquid crystal cells, the first polarised light spectral module is identical, is arranged alternately.
4. device according to claim 2 is characterized in that, described reflecting module and the described first polarised light spectral module, the second polarised light spectral module are corresponding one by one.
5. according to the arbitrary described device of claim 2～4, it is characterized in that,
Described reflecting module is speculum or prism;
The described second polarised light spectral module is polarised light splitter or speculum or prism;
Described diffraction element is diffraction grating or diffraction grating group;
Described redirected unit is lens or set of lenses, and described diffraction grating is positioned at the place, focal plane of described lens or set of lenses.
6. according to the arbitrary described device of claim 1～4, it is characterized in that, described liquid crystal cells is the liquid crystal array group, the open and close control of described liquid crystal array group and the polarization state of the corresponding subchannel light beam of described liquid crystal array group make the polarization state of described subchannel light beam change or remain unchanged.
7. according to the arbitrary described device of claim 1～4, it is characterized in that,
Described redirected unit also is used to converge the subchannel light beam from described reflecting module reflection;
Described diffraction element also is used for the described subchannel light beam that described redirected unit sends is closed bundle.
8. a Wavelength selecting method is characterized in that, comprising:
Incident light is resolved into the subchannel light beam of different centre wavelengths;
It is subparallel subchannel light beam that described subchannel light beam is redirected;
Optionally change the polarization state of described subparallel subchannel light beam;
Variation according to described polarization state is projected to different exit ports with described subparallel subchannel light beam.
9. method according to claim 8 is characterized in that, described variation according to described polarization state is projected to different exit ports with described subparallel subchannel light beam and comprises:
The subchannel light beam that described polarization state has been changed reflects, and the unaltered subchannel light beam of described polarization state is carried out transmission;
Described subchannel light beam is projected to diverse location;
The subchannel light beam of described diverse location converged again close bundle.
10. a wavelength multiplexing equipment is characterized in that, comprising: the arbitrary described wavelength selection system of polarization converter, incident exit ports and claim 1～7;
Described polarization converter is used for unified multi-wavelength multiplex polarization state of light, and described multi-wavelength multiplex polarization state of light is restored to described incident exit ports in outgoing;
Described wavelength selection system, be used for described multi-wavelength multiplex photolysis is become the subchannel light beam of different centre wavelengths, by optionally changing the polarization state of described subparallel subchannel light beam, described subchannel light beam is converged the multi-wavelength multiplex light that closes the formation of bundle back be emitted to described polarization converter;
Described incident exit ports is used to receive described subchannel light beam and converges and close the multi-wavelength multiplex light that the bundle back forms, and penetrates the described multi-wavelength multiplex light that closes behind the bundle that converges.
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| CN2009100839824A CN101888280A (en) | 2009-05-13 | 2009-05-13 | Wavelength selecting device and method as well as wavelength multiplexing equipment |
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| CN2009100839824A CN101888280A (en) | 2009-05-13 | 2009-05-13 | Wavelength selecting device and method as well as wavelength multiplexing equipment |
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| CN110709762A (en) * | 2017-09-26 | 2020-01-17 | 华为技术有限公司 | Wavelength selection switch, alignment direction obtaining method, silicon-based liquid crystal and manufacturing method |
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| WO2017071017A1 (en) * | 2015-10-29 | 2017-05-04 | 武汉光迅科技股份有限公司 | Wavelength selective switch |
| US10401570B2 (en) | 2015-10-29 | 2019-09-03 | Accelink Technologies Co., Ltd. | Wavelength selective switch |
| CN107003480A (en) * | 2016-03-01 | 2017-08-01 | 肖峰 | Wavelength selection switch device, communication equipment and wavelength switching method |
| CN107003480B (en) * | 2016-03-01 | 2019-11-05 | 肖峰 | Wavelength selection switch device, communication equipment and wavelength switching method |
| CN110709762A (en) * | 2017-09-26 | 2020-01-17 | 华为技术有限公司 | Wavelength selection switch, alignment direction obtaining method, silicon-based liquid crystal and manufacturing method |
| US10901294B2 (en) | 2017-09-26 | 2021-01-26 | Huawei Technologies Co., Ltd. | Wavelength selective switch, alignment direction obtaining method, and liquid crystal on silicon and method for manufacturing same |
| CN110709762B (en) * | 2017-09-26 | 2021-04-09 | 华为技术有限公司 | Wavelength selection switch, alignment direction obtaining method, silicon-based liquid crystal and manufacturing method |
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Application publication date: 20101117 |