CN101018098A - Wave division multiplexer/demultiplexer and its making method - Google Patents
Wave division multiplexer/demultiplexer and its making method Download PDFInfo
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- CN101018098A CN101018098A CNA2007100173068A CN200710017306A CN101018098A CN 101018098 A CN101018098 A CN 101018098A CN A2007100173068 A CNA2007100173068 A CN A2007100173068A CN 200710017306 A CN200710017306 A CN 200710017306A CN 101018098 A CN101018098 A CN 101018098A
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Abstract
The disclosed wavelength division multiplexer comprises: the light-sensitive material with multiple Prague grid layers, a light guide device coupled with different first or third ends of grid layer, at least one grid layer as the emergent/incidence surface, one of the second and fourth surfaces as incidence/emergent surface, and some fiber receivers and some strip focus devices. This invention has much coupled wavelength, and close channel.
Description
Technical field
The present invention relates to a kind of energy and realize the Wavelength-division multiplexer/demultiplexer of intensive different wave length light wave multiplex/demultiplex, and relate to its manufacture method.
Background technology
Wavelength-division demultiplexing (WDM, wavelength-division multiplexing) technology is widely used in modern optical communication and optical-fiber network, this is a kind of channel-splitting filter, the light of one group of wavelength can be divided into several wavelength, the light wave of different wave length can be separated.Because the light wave of different wave length is the different channel of correspondence in optical communication, therefore increase the bandwidth that demultiplexing wavelength channel number can effectively increase optical communication.And because to the continuous growth of broadband high-speed communication demand, satisfy the demand that message capacity and speed are increased day by day, except spread bandwidth, an effective method reduces channel spacing exactly.Channel spacing is reduced to 10GHz, 50GHz from 200GHz at present, will be reduced to 1GHz even littler in the near future.Therefore, the demodulation multiplexer that is used for the wavelength-division demultiplexing need be handled increasing wavelength, and littler channel spacing is called such Wave decomposing multiplexer dense wavelength division demodulation multiplexer (DWDM, dense wavelength-division multiplexing) usually.
DWDM (dense wavelength division demultiplexing) technology is little with respect to its channel spacing of WDM technology, channel closeness height, and increase the wavelength channel quantity of demultiplexing as far as possible.Dense wavelength division demultiplexing technology becomes big Capacity Optical communication and gradually to the preferred plan of existing network dilatation, and become the key of following optical-fiber network, along with the requirement of modern communications development, the novel multi-channel dense wavelength division demultiplexing of stable performance will be by wilderness demand.
In recent years, the holographic Bragg grating of body is with the various advantages in its good angle and wavelength selectivity and the making, and the development for light wave decomposition multiplex device provides a kind of new thinking and method.Promptly by utilizing optical writing method, people make Bragg grating to be used as narrow band optical filter or Wave decomposing multiplexer spare in body piece light sensitive material.
The n rerouting glug grating that writes down in light sensitive material can be realized the demultiplexing of n passage.In order to obtain the holographic Bragg grating of body as much as possible in the light sensitive material of same volume, usual method is along using perpendicular to the optical propagation direction split block with light sensitive material.Such as the D.Psaltis of California, USA science and engineering leader seminar developed utilize bar shaped subregion method record be used for being in harmonious proportion the volume holographic grating of Fixed Wavelength Filter.But this subregion method is owing to slab region laterally arranges, each port generally can only be distributed in the two ends of slab region during real work, and the raster count of demultiplexing is subjected to the restriction in output port space generally to be no more than two, thereby this bar shaped partitioned organization is seldom as Wave decomposing multiplexer.
In addition, wavelength division multiplexer is exactly that the light wave of different wave length is coupled in the same optical fiber, and it is the inverse process of wavelength-division demultiplexing.Since the invertibity of light path, so the structure of wavelength division multiplexer can be identical with the structure of Wave decomposing multiplexer, and both manufacture methods are also consistent.So prior art Wave decomposing multiplexer channel is few, port is provided with limited problem, exists too in wavelength division multiplexer.
Summary of the invention
Prior art Wavelength-division multiplexer/demultiplexer channel is few in order to overcome, port is provided with limited problem, the invention provides that a kind of channel is intensive, port is provided with Wavelength-division multiplexer/demultiplexer freely.
The technical solution adopted for the present invention to solve the technical problems is: a kind of Wavelength-division multiplexer/demultiplexer, it comprises light-sensitive material, described light-sensitive material comprises first that connects successively, second, the 3rd and fourth face, described first and the 3rd face are oppositely arranged, described second and fourth face are oppositely arranged, and described light-sensitive material inside is provided with some multiple Bragg grating layers, one end face of wherein at least one Bragg grating layer is exit facet/plane of incidence, its other end is connected by the end face that the arbitrary Bragg grating layer of photocon and all the other is on first or the 3rd, and the end face that described arbitrary Bragg grating layer is in first and the 3rd by photocon respectively with first or the 3rd of different Bragg grating layer on end face be of coupled connections in twos, described in addition second and fourth face one at least are the plane of incidence/exit facet, to being provided with some fiber optic receivers and some bar shaped convergence apparatus by face, described each bar shaped convergence apparatus is contour with each Bragg grating layer respectively, and corresponding each fiber optic receiver of its focus point.
Described photocon can adopt the hits prism that is all-trans of some discrete arrangements, and the described hits prism that is all-trans is of coupled connections by index-matching fluid and described Bragg grating layer end face, to realize the light wave transmissions between the adjacent Bragg grating layer.
Described photocon can adopt optical fiber, and the two ends that described optical fiber is connected with Bragg grating layer end face are respectively and import end and derive end, and the importing end of described optical fiber and derive end and be of coupled connections by collimater and Bragg grating facing layer separately respectively.
Described Bragg grating is provided with anti-reflection film with the corresponding end face of photocon.
Described bar shaped convergence apparatus comprises bar shaped convex lens or bar shaped post lens.
The manufacture method of Wavelength-division multiplexer/demultiplexer of the present invention in addition, its step comprises:
The first step a: light-sensitive material is provided, described light-sensitive material is arranged in the interference field, utilize the mode of coherent light interference that the Bragg grating layer is set in described light-sensitive material, described light-sensitive material is rotated some angles continuously or rotates described interference light wave angle degree, and in this Bragg grating layer, form multiple Bragg grating by multiexposure, multiple exposure;
Second step: being of coupled connections between described different Bragg grating layer end face to be communicated with the photocon of described different Bragg grating layer;
The 3rd step: the bar shaped convergent lens is set in second of described light-sensitive material and fourth face and each Bragg grating layer equal-height position;
The 4th step: can some fiber optic receivers be set focal spot in described bar shaped convergent lens.
The invention has the beneficial effects as follows: the present invention is as demodulation multiplexer, because the end face of Bragg grating layer is coupled with photocon, it can be logical with different Bragg grating photoconduction, make and do not entered next Bragg grating layer by the light wave of a last Bragg grating layer institute diffraction, and proceed the diffraction demultiplexing, so repeatedly, can make that the light wave of each wavelength is separated fully.Therefore the number of wavelengths of demodulation multiplexer demultiplexing of the present invention is many, and channel spacing is little, is easy to realize intensive wavelength-division demultiplexing, and the light wave that institute's diffraction separates is understood the fiber optic receiver that coalescence is coupled into corresponding wavelength by the bar shaped convergent lens, so demultiplexing is effective.In addition, second of described light-sensitive material and fourth face all can be used as the signal output face of wavelength-division demultiplexing, therefore a plurality of output ports can be set, and are easy to realize intensive demultiplexing.
In addition, as wavelength division multiplexer, each Bragg grating layer all can be used as the incident port at second end face with fourth face, so port is provided with degree of freedom height.In addition, the light wave of the different wave length that enters by each Bragg grating layer will be coupled to certain one deck Bragg grating layer, and from the outgoing end face outgoing of this Bragg grating layer, therefore the wavelength of coupling is many, and channel is intensive.
Below in conjunction with drawings and Examples the utility model is further specified.
Description of drawings
Fig. 1 is the structural representation of Wave decomposing multiplexer first execution mode of the present invention;
Among the figure, 1-light-sensitive material, 2-photocon, 3-bar shaped convergent lens, 4-fiber optic receiver, first of 11-, second of 12-, the 3rd of 13-, 14-fourth face, 25-Bragg grating layer, anti-reflection film 21.
Fig. 2 is the floor map of Bragg grating layer among Fig. 1;
Among the figure, 25-Bragg grating layer, 26-substance Bragg grating.
Fig. 3 is the enlarged diagram of photocon among Fig. 1;
Among the figure, 1-light-sensitive material, 2-photocon, second of 12-, 22, the 23-reflecting surface, 24-coupling surface, 25-Bragg grating layer.
Fig. 4 is the vertical view of Fig. 1 Wave decomposing multiplexer;
Among the figure, 1-light-sensitive material, 3-bar shaped convergent lens, 4-fiber optic receiver, second of 12-, 14-fourth face.
Fig. 5 is the structural representation of Wave decomposing multiplexer second execution mode of the present invention;
Among the figure, the 1-light-sensitive material, the 2-photocon, 3-bar shaped convergent lens, first of 11-, second of 12-, the 3rd of 13-, the 14-fourth face, 25-Bragg grating layer, 32-imports end, and 33-derives end.
The improvement schematic diagram of second embodiment of the invention during Fig. 6;
Among the figure, the 1-light-sensitive material, the 2-photocon, 3-bar shaped convergent lens, first of 11-, second of 12-, the 3rd of 13-, the 14-fourth face, 25-Bragg grating layer, 32-imports end, and 33-derives end.
Embodiment
Embodiment one:
See also Fig. 1, it is the structural representation of Wave decomposing multiplexer first execution mode of the present invention.Described Wave decomposing multiplexer comprises a light-sensitive material 1, some photocons 2, some bar shaped convergent lenses 3 and some fiber optic receivers 4, and wherein, described some photocons 2 are of coupled connections with described light-sensitive material 1.
Described light-sensitive material 1 is side's body, and it is subjected to after the illumination refractive index or transmitance can change, and the size that refractive index or transmitance change is relevant with exposure.Described light-sensitive material 1 can be the light sensitive material of photorefractive material, photochromic material, photopolymer or other type.Described light-sensitive material 1 comprises successively first 11, second 12, the 3rd 13 and the fourth face 14 that connects, and wherein, described first 11 is oppositely arranged respectively with the 3rd 13, second 12 and fourth face 14.Be provided with the k layer Bragg grating layer 25 that is parallel to each other in the described light-sensitive material 1, and every layer there is m rerouting glug grating 26.
Please consult Fig. 2 simultaneously, it is double Bragg grating 26 schematic diagrames of 25 li on described Bragg grating layer, described every rerouting glug grating 26 is arranged in parallel, different heavy Bragg grating 26 interlaced formation grids, and corresponding different wavelength, thereby described light-sensitive material 1 has k*m channel passage.In addition, described k layer Bragg grating layer 25 end face are respectively formed on 1 first 11, second 12, the 3rd 13 of described light-sensitive materials and the fourth face 14.Wherein, described first 11 one deck Prague end face is the plane of incidence, and the described plane of incidence is coated with an anti-reflection film 21.Described second 12 and fourth face 14 all can be used as the exit facet by 25 diffraction demultiplexing of each Bragg grating layer.
In addition, described photocon 2 is the hits prism that is all-trans, it is by be of coupled connections end face between the described light-sensitive material 1 adjacent Bragg grating layer 25 of index-matching fluid, wherein, light loss when described index-matching fluid can effectively reduce optical transmission, in addition, the refractive index of described total reflection right-angle prism is consistent with the refractive index of described light-sensitive material 1.See also Fig. 3, it is the be all-trans enlarged diagram of hits prism of photocon 2 among Fig. 1, the wherein said hits prism that is all-trans comprises a coupling surface 24 and orthogonal two reflectings surface 22,23, described coupling surface 24 is connected with described two reflectings surface 22,23, and is of coupled connections in twos with the end face of adjacent two Bragg grating layers 25.
Described some bar shaped convergent lenses 3 are the bar shaped convex lens, described bar shaped convex lens are arranged parallel to each other, it is provided with towards second 12 of described light-sensitive material and fourth face 14, and respectively with described second 12 and fourth face 14 end faces on each Bragg grating layer 25 mutually contour.Please consult Fig. 4 simultaneously, it is the vertical view of Fig. 1 Wave decomposing multiplexer.Wherein, described bar shaped convergent lens 3 and fiber optic receiver 4 are arranged on second 12 and fourth face 14 both sides of described light-sensitive material 1, described fiber optic receiver 4 is arranged on the meeting focal spot of described bar shaped convergent lens 3, and receives the light wave of being assembled by described convergent lens 3.
In the present embodiment, when light wave enters light-sensitive material 1 via the anti-reflection film 21 on the Bragg grating layer end face of 1 first 11 of light-sensitive material, at this moment, Prague incidence angle of each wavelength is identical.Yet, therefore the light wave that incides different wave length on the light-sensitive material 1 can be come out from second 12 or fourth face 14 selection diffraction with different angles because under the same rerouting glug grating, the condition of Prague that different wave length satisfied coupling is different.The light wave of diffracted separation is then assembled by the bar shaped convergent lens earlier, and is coupled into the fiber optic receiver 4 of corresponding different wave length, thereby realizes the wavelength-division demultiplexing.
The described light wave that does not satisfy Prague coupling penetrates this Bragg grating layer 25 straight, and is positioned at the 3rd 13 end face outgoing from described Bragg grating layer 25.The light wave of institute's outgoing then is coupled into described total reflection right-angle prism by the coupling surface 24 of total reflection right-angle prism.This light wave is successively through coupling surface 24 next Bragg grating layer 25 of coupling importing by the total reflection right-angle prism once more after described two reflectings surface 22,23 reflection then.Thereby the light wave that satisfies the respective wavelength of Prague matching relationship passes through second 12 and 14 diffraction outgoing of fourth face by this next Bragg grating layer 25 with different angles again, and after being assembled, be coupled into fiber optic receiver 4, thereby realize the wavelength-division demultiplexing with the contour bar shaped convergent lens 3 of this Bragg grating layer 25.Remaining light wave continues to enter down one deck Bragg grating layer 25 after then reflecting via the total reflection right-angle prism that is arranged at first 11, so repeatedly, the continuous diffraction of each wavelength of light wave can be separated, thereby realization is to the abundant wavelength-division demultiplexing of former light wave.
In addition, because every layer of Bragg grating layer 25 can be provided with multiple Bragg grating 26, therefore and the light wave of identical wavelength is also inconsistent in Prague matching condition that different rerouting glug gratings 26 are satisfied, can't still may be by other rerouting glug grating institute diffraction demultiplexings at the light wave of certain rerouting glug grating institute diffraction.Because the light wave of different wave length can separate from second 12 with fourth face 14 diffraction respectively via the heavy Bragg grating 26 of difference, therefore Wave decomposing multiplexer of the present invention can be provided with a plurality of output ports at second 12 and fourth face 14, thereby is easy to realize intensive demultiplexing.
Therefore Wave decomposing multiplexer of the present invention can carry out repeatedly fully wavelength-division demultiplexing by the total reflection right-angle prism of the some Bragg grating layers 25 and the adjacent two Bragg grating layers 25 that are of coupled connections to the light wave of different wave length, and it is little at interval by each optical wavelength that each 25 layers of institute of Bragg grating diffraction separates, channel is intensive, compact conformation.In addition, the light wave that institute's diffraction separates can be assembled convex lens by bar shaped can be coupled into fiber optic receiver 4 by coalescence, so demultiplexing is effective, and practicality is good.
In addition, the manufacture method of Wave decomposing multiplexer of the present invention is as follows, the steps include:
The first step a: light-sensitive material 1 is provided, described light-sensitive material 1 is arranged in the interference field, utilize the mode of coherent light interference in described light-sensitive material 1, Bragg grating layer 25 to be set, described light-sensitive material 1 is rotated some angles continuously or rotates described interference light wave angle degree, and in this Bragg grating layer 25, form multiple Bragg grating 26 by multiexposure, multiple exposure;
Second step: photocon 2 is binded in the end face coupling in described adjacent Bragg grating layer 25;
The 3rd step:, with each Bragg grating layer equal-height position bar shaped convergent lens 3 is set at second 12 of described light-sensitive material and fourth face 14 according to the light wave of the different wave length of 26 diffraction of described light-sensitive material 1 different rerouting glug gratings;
The 4th one: can some fiber optic receivers 4 be set focal spot in described bar shaped convergent lens.
Embodiment two:
See also Fig. 5, it is the structural representation of Wave decomposing multiplexer second execution mode of the present invention.The structural similarity of the Wave decomposing multiplexer of the described Wave decomposing multiplexer structure and first execution mode, it also comprises light-sensitive material 1, some photocons 2, some bar shaped convergent lenses 3 and some fiber optic receivers 4, and described light-sensitive material 1 inside also is provided with the Bragg grating layer 25 that is parallel to each other, and every layer of Bragg grating layer 25 also is provided with the staggered mutually Bragg grating 26 of some heavy phases.Yet the photocon 2 of the adjacent Bragg grating layer 25 of described connection is an optical fiber, and described optical fiber comprises an importing end 32 and one derivation end 33, and described importing end 32 and derivation end 33 all are coupled with collimater.Described optical fiber imports end 32 and is coupled with Bragg grating layer 25 1 end face by collimater and is connected, described optical fiber is derived end 33 and is coupled with an end face of its another different Bragg grating layer 25 and is connected, wherein, described collimater and Bragg grating layer 25 end face corresponding with it are provided with anti-reflection film 21, to reduce optical loss.
When light wave enters a Bragg grating layer 25 by Wave decomposing multiplexer light-sensitive material 1 one end faces, the incidence angle of different wave length light wave is identical, yet because the condition of Prague that different wave length satisfied coupling is different, and under the different rerouting glug gratings, Prague matching condition that same wavelength satisfied is also different, therefore the light wave that incides different wave length on the crystal can be separated from second 12 or fourth face 14 diffraction respectively with different angles.In addition, Bragg grating layer 25 from second 12 light wave that separates with 14 diffraction of fourth face by with the contour bar shaped convergent lens 3 of Bragg grating layer 25 understand coalescence and be coupled into fiber optic receiver 4, thereby realize the wavelength-division demultiplexing.
Similar with the Wave decomposing multiplexer of first embodiment of the invention, the light wave that does not satisfy Prague coupling penetrates this Bragg grating layer 25 straight, and be coupled into optical fiber by the collimater that is of coupled connections with these Bragg grating layer 25 end faces, enter next Bragg grating layer 25 via deriving end 33 by optical fiber behind the described fibre-optic light guide then, proceed the wavelength-division demultiplexing by this Bragg grating 25.The light wave that does not satisfy Prague matching condition then penetrates this Bragg grating layer 25 and introduces next the Bragg grating layer 25 that is adjacent by optical fiber, to proceed the wavelength-division demultiplexing, so repeatedly, can make the abundant diffraction of light wave of each wavelength of light wave separate, and assemble and be coupled into fiber optic receiver 4 again, thereby realize the wavelength-division demultiplexing by being arranged on second 12 and fourth face 14 and Bragg grating layer 25 contour bar shaped convergent lens 3.
The Wave decomposing multiplexer of present embodiment is realized the light wave of different wave length is carried out the dense wavelength division demultiplexing by the optical fiber of the Bragg grating layer 25 and the adjacent Bragg grating layer 25 that is of coupled connections, its channel is intensive, can satisfy in the modern optical communication demand to the high speed high bandwidth.
The step of manufacturing of present embodiment Wave decomposing multiplexer is as follows:
The first step a: light-sensitive material 1 is provided, described light-sensitive material 1 is arranged in the interference field, utilize the mode of coherent light interference in described light-sensitive material 1, Bragg grating layer 25 to be set, described light-sensitive material 1 is rotated some angles continuously or rotates described interference light wave angle degree, and in this Bragg grating layer 25, form multiple Bragg grating 26 by multiexposure, multiple exposure;
Second step: in the both ends of the surface of each Bragg grating layer 25 respectively by bonding collimater be of coupled connections different fiber importing end 32 and derive end 33, the importing end of this optical fiber and derive be of coupled connections end face between the adjacent Bragg grating layer of end;
The 3rd step: with 1 second 12 of described light-sensitive material and fourth face 14 the contour bar shaped convergent lens 3 of some and Bragg grating layer 25 is set, described bar shaped convergent lens 3 will be assembled the light wave of second 12 or fourth face 14 diffraction outgoing;
The 4th step: can some fiber optic receivers 4 be set focal spot in described bar shaped convergent lens.
Embodiment three:
See also Fig. 6, present embodiment also can be done following improvement, be the importing end 32 of described optical fiber and derive end 33 can be of coupled connections lay respectively between the different Bragg grating layer 25 first 11 with the 3rd 13 different end faces, thereby make Wave decomposing multiplexer each optical fiber importing end 32 and derive the same one side that end 33 is separately positioned on light-sensitive material 1, make with convenient.
In addition, described photocon 2 is not limited to be of coupled connections and is positioned at first 11 and the 3rd 13 different end faces between the adjacent Bragg grating layer, its also can connect be positioned between the non-conterminous two Bragg grating layers mutually first 11 with the 3rd 13 on different end faces.Be that the end face that is positioned at first 11 and the 3rd 13 between each different Bragg grating layer can be of coupled connections in twos by photocon 2.
Moreover, Wave decomposing multiplexer of the present invention is arranged on 1 second 12 of light-sensitive material or fourth face 14 and each layer Bragg grating layer 25 contour some bar shaped convergent lens 3 and is not limited to the bar shaped convex lens, can be substituted by bar shaped post lens or other convergence apparatus, its light wave that 25 diffraction of different Bragg grating layers are separated is coupled into fiber optic receiver 4 at this bar shaped convergent lens focus place meeting coalescence and gets final product.Except that strengthening the coupling effect, also anti-reflection film 21 can be set between the end face that photocon 2 of the present invention reaches and light-sensitive material 1 intercouples, the light loss when being coupled to reduce by index-matching fluid.
In addition, Wave decomposing multiplexer of the present invention is reversible down in light path, can be used as wavelength division multiplexer and uses, and both structures are identical, and manufacture method is also consistent, and only light path reverses.At this moment, each fiber optic receiver 4 of former Wave decomposing multiplexer will send the light wave of different wave length, and described light wave is coupled into each Bragg grating layer 25 contour with it by described some bar shaped convergent lenses 3.By each rerouting glug grating 26 diffraction Wavelength matched with it, and from first 11 or the 3rd 13 outgoing, the light wave of institute's outgoing is coupled to a last Bragg grating layer 25 by photocon 2 to described light wave then in each Bragg grating layer 25.Described light wave converges with the light wave that enters from second 12 on this layer Bragg grating layer and fourth face 14, and imports a last Bragg grating layer 25 once more by photocon 2.So repeatedly, the light wave of the different wave length that entered by 25 second 12 on each Bragg grating layer and fourth face 14 can be coupling in the Bragg grating layer 25 of the superiors, and from the plane of incidence outgoing of former Wave decomposing multiplexer, thereby realize dense wave division multipurpose.Therefore as wavelength division multiplexer, because the end face of each Bragg grating layer 25 on second 12 and fourth face 14 all can be used as input port, so port number is many, and the light wave of the more different wave length that can be coupled is easy to realize dense wave division multipurpose.In addition, owing to port can be arranged on the variant Bragg grating layer 25, so port is provided with degree of freedom height.
The present invention has multiple Bragg grating layer and the Wave decomposing multiplexer of the photocon of the adjacent Bragg grating layer that is of coupled connections will not carried out the diffraction demultiplexing by the Bragg grating of one deck under the light wave of the last Bragg grating layer institute diffraction demultiplexing continuation importing, and so forth, make the light wave of each wavelength obtain abundant demultiplexing, therefore the diffracted demultiplexing of described light wave often, channel spacing is little, can effectively realize the dense wavelength division demultiplexing.And second of described light-sensitive material and fourth face all can be used as the exit facet of wavelength-division demultiplexing, therefore be beneficial to a plurality of output ports are set, thus easier realization dense wavelength division demultiplexing.In addition, the bar shaped convergent lens of Wave decomposing multiplexer of the present invention can be understood coalescence with the light wave that diffraction separates and be coupled into fiber optic receiver, so the demultiplexing effect is good.
As wavelength division multiplexer, each Bragg grating layer of wavelength division multiplexer of the present invention all can be used as the incident port at second end face with fourth face, so port is provided with degree of freedom height in addition.In addition, the light wave of the different wave length that enters by each Bragg grating layer will be coupled to certain one deck Bragg grating layer, and from the end face outgoing of this Bragg grating layer, therefore the wavelength of coupling is many, and channel is intensive.
Claims (6)
1, a kind of Wavelength-division multiplexer/demultiplexer, comprise light-sensitive material, it is characterized in that: described light-sensitive material comprises first that it connects successively, second, the 3rd and fourth face, described first and the 3rd face are oppositely arranged, described second and fourth face are oppositely arranged, and described light-sensitive material inside is provided with some multiple Bragg grating layers, one end face of wherein at least one Bragg grating layer is exit facet/plane of incidence, its other end is connected by the end face that the arbitrary Bragg grating layer of photocon and all the other is on first or the 3rd, and the end face that described arbitrary Bragg grating layer is in first and the 3rd by photocon respectively with first or the 3rd of different Bragg grating layer on end face be of coupled connections in twos, described second and fourth face one at least are the plane of incidence/exit facet, to being provided with some fiber optic receivers and some bar shaped convergence apparatus by face, described each bar shaped convergence apparatus is contour with each Bragg grating layer respectively, and corresponding each fiber optic receiver of its focus point.
2, according to utilizing the described a kind of Wavelength-division multiplexer/demultiplexer of claim 1, it is characterized in that: described photocon adopts the hits prism that is all-trans of some discrete arrangements, and the described hits prism that is all-trans is of coupled connections by index-matching fluid and described Bragg grating layer end face.
3, according to utilizing the described a kind of Wavelength-division multiplexer/demultiplexer of claim 1, it is characterized in that: described photocon adopts optical fiber, the two ends that described optical fiber is connected with Bragg grating layer end face are respectively and import end and derive end, and the importing end of described optical fiber and derive end and be of coupled connections by collimater and Bragg grating facing layer separately respectively.
4, according to utilizing the described a kind of Wavelength-division multiplexer/demultiplexer of claim 1, it is characterized in that: described Bragg grating is provided with anti-reflection film with the corresponding end face of photocon.
5, according to utilizing the described a kind of Wavelength-division multiplexer/demultiplexer of claim 1, it is characterized in that: described bar shaped convergence apparatus comprises bar shaped convex lens or bar shaped post lens.
6, the manufacture method of the described Wavelength-division multiplexer/demultiplexer of a kind of claim 1 is characterized in that comprising the steps:
(a) provide a light-sensitive material, described light-sensitive material is arranged in the interference field, utilize the mode of coherent light interference that the Bragg grating layer is set in described light-sensitive material, described light-sensitive material is rotated some angles continuously or rotates described interference light wave angle degree, and in this Bragg grating layer, form multiple Bragg grating by multiexposure, multiple exposure;
(b) between described different Bragg grating layer end face, be of coupled connections and be communicated with the photocon of described different Bragg grating layer;
(c) in second of described light-sensitive material and fourth face and each Bragg grating layer equal-height position the bar shaped convergent lens is set;
(d) can some fiber optic receivers be set focal spot in described bar shaped convergent lens.
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| CN108873316A (en) * | 2018-07-09 | 2018-11-23 | 中国科学院上海光学精密机械研究所 | Muti-piece multichannel is multiplexed volume Bragg grating and cascades angular deflection device |
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| CN110389451A (en) * | 2018-04-19 | 2019-10-29 | 华为技术有限公司 | A kind of optic switching device |
| WO2022062676A1 (en) * | 2020-09-27 | 2022-03-31 | 苏州旭创科技有限公司 | Wavelength division multiplexer/demultiplexer, photonic integrated chip, and optical module |
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| US6373567B1 (en) * | 1999-12-17 | 2002-04-16 | Micron Optical Systems | Dispersive near-IR Raman spectrometer |
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| CN110389451A (en) * | 2018-04-19 | 2019-10-29 | 华为技术有限公司 | A kind of optic switching device |
| CN108873316A (en) * | 2018-07-09 | 2018-11-23 | 中国科学院上海光学精密机械研究所 | Muti-piece multichannel is multiplexed volume Bragg grating and cascades angular deflection device |
| CN108873316B (en) * | 2018-07-09 | 2020-10-16 | 中国科学院上海光学精密机械研究所 | Multi-block multi-channel multiplexing volume Bragg grating cascade angle deflector |
| CN109687910A (en) * | 2019-01-28 | 2019-04-26 | 杭州华宏通信设备有限公司 | A kind of optical module based on OTN optic communication |
| CN109687910B (en) * | 2019-01-28 | 2023-09-29 | 杭州华宏通信设备有限公司 | Optical module based on OTN optical communication |
| WO2022062676A1 (en) * | 2020-09-27 | 2022-03-31 | 苏州旭创科技有限公司 | Wavelength division multiplexer/demultiplexer, photonic integrated chip, and optical module |
| CN115657202A (en) * | 2022-10-21 | 2023-01-31 | 之江实验室 | Silicon-based wavelength demultiplexing device based on grating-assisted reverse coupling |
| CN115657202B (en) * | 2022-10-21 | 2023-08-01 | 之江实验室 | Silicon-based wavelength demultiplexing device based on grating auxiliary reverse coupling |
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