CN105572796A - Add/drop filter based on antisymmetric multimode Bragg waveguide grating - Google Patents
Add/drop filter based on antisymmetric multimode Bragg waveguide grating Download PDFInfo
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- CN105572796A CN105572796A CN201610126673.0A CN201610126673A CN105572796A CN 105572796 A CN105572796 A CN 105572796A CN 201610126673 A CN201610126673 A CN 201610126673A CN 105572796 A CN105572796 A CN 105572796A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/12007—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind forming wavelength selective elements, e.g. multiplexer, demultiplexer
- G02B6/12009—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind forming wavelength selective elements, e.g. multiplexer, demultiplexer comprising arrayed waveguide grating [AWG] devices, i.e. with a phased array of waveguides
Abstract
The invention discloses an add/drop filter based on an antisymmetric multimode Bragg waveguide grating. When TE light is input from a single-mode input waveguide, a drop asymmetric Y-branch waveguide converts the TE light into a TE fundamental mode of a multimode waveguide; the antisymmetric Bragg waveguide grating carries out back-coupling on the incident light meeting phase matching condition wavelength to form reflected light; the reflected light is converted into a TE mode of a drop single-mode waveguide when passing through the drop asymmetric Y-branch waveguide, and the TE mode is output from the drop end; transmission light passes through an add asymmetric Y-branch waveguide and is output from a single-mode output waveguide; similarly, add light is input from an add single-mode input waveguide; the add asymmetric Y-branch waveguide converts the add light into a TE first-order mode of the multimode waveguide; and the antisymmetric Bragg waveguide grating enables the reflected light meeting the phase matching condition wavelength to be converted into a TE mode of the single-mode output waveguide when the reflected light passes through the add asymmetric Y-branch waveguide, and the TE mode is output from the output end. The add/drop filter realizes signal adding/dropping function, and can be applied to an on-chip super-integrated optical interconnection system.
Description
Technical field
The present invention relates to setting out on a journey and lower road filtering integrated device of a kind of light, particularly relate to a kind of path filter up and down based on antisymmetry multimode Bragg waveguide grating.
Background technology
Along with the develop rapidly of integrated circuit, transistor feature size constantly reduces, and high speed information has inevitably met with a series of bottlenecks in speed, bandwidth sum power consumption etc. when electrical interconnection is transmitted.The solution that sheet glazing based on silicon optics is interconnected as this technical barrier provides a kind of feasible scheme, and the exchange of information is directly carried out in the transport layer of light.
Optical filter, as a basic function device of light network, can realize the separation of unlike signal neatly, set out on a journey He Xialu, is the very important link of dense wavelength division multiplexing optical networks.The device that can realize light top and bottom path filter function at present mainly contains three kinds of structures: the first is micro-ring resonant cavity configuration, it can provide higher Q value, it does not need two to reflect end face simultaneously, but there is a series of resonance wavelength in it, the filtering of light is subject to the impact of free spectrum width, and the bandwidth of filtering is less; The second is F-P cavity structure, and its needs two reflection end faces, there is a series of resonance wavelength and the little feature of filtering bandwidth; The third is Bragg-grating structure, it utilizes periodic refractive index perturbation district, the light filter function of different bandwidth can be realized, but because it is two end device, band cannot be realized lead to and bandreject filtering function simultaneously, the reflectance spectrum of light cannot be extracted by similar fiber optic circulator, if adopt symmetrical Y bifurcation structure will introduce the loss of 6dB.
Therefore, develop that structure is simple, compact dimensions, multiple functional, the optical filter of road up and down that is easy to integrated and makes is the important and significant work of integrated optical communication technology on Future Development sheet.
Summary of the invention
The object of the present invention is to provide a kind of path filter up and down based on antisymmetry multimode Bragg waveguide grating, structure be simple, compact dimensions, multiple functional, be easy to integrated and make.
A kind of path filter up and down based on antisymmetry multimode Bragg waveguide grating of the present invention, comprise singlemode input waveguide, the Asymmetry Y furcation waveguide of lower road, multimode waveguide, antisymmetry Bragg waveguide grating, to set out on a journey Asymmetry Y furcation waveguide, single-mode output waveguide, lower road single mode waveguide and singlemode input waveguide of setting out on a journey, wherein singlemode input waveguide is connected with lower road Asymmetry Y furcation waveguide one branch, lower road single mode waveguide is connected with another branch of lower road Asymmetry Y furcation waveguide, the trunk of lower road Asymmetry Y furcation waveguide is connected with one end of multimode waveguide, the other end of multimode waveguide and the Truck Connection of Asymmetry Y furcation waveguide of setting out on a journey, single-mode output waveguide is connected with Asymmetry Y furcation waveguide one branch of setting out on a journey, singlemode input waveguide of setting out on a journey is connected with another branch of Asymmetry Y furcation waveguide of setting out on a journey, described antisymmetry Bragg waveguide grating is positioned on multimode waveguide, distribute in antisymmetry.
Described singlemode input waveguide, the Asymmetry Y furcation waveguide of lower road, multimode waveguide, antisymmetry Bragg waveguide grating, Asymmetry Y furcation waveguide of setting out on a journey, lower road single mode waveguide, set out on a journey single mode waveguide and single-mode output waveguide are slab waveguide.
Described lower road Asymmetry Y furcation waveguide is consistent with Asymmetry Y furcation waveguiding structure of setting out on a journey, and two branches of Asymmetry Y furcation waveguide are made up of the single mode waveguide that two width are different, and the trunk of Asymmetry Y furcation waveguide is made up of a multimode waveguide.
It is the phase-matching condition of TE First-Order Mode that the cycle of described antisymmetry Bragg waveguide grating meets the TE basic mode reverse coupled in multimode waveguide.
The periodic refractive index perturbation district of this antisymmetry Bragg waveguide grating is on the dual-side of multimode waveguide.
The periodic unit shape of described formation antisymmetry Bragg waveguide grating is rectangle.
Adopt technical scheme of the present invention, TE light inputs from singlemode input waveguide, the Asymmetry Y furcation waveguide of lower road is converted into the TE basic mode of multimode waveguide, antisymmetry Bragg waveguide grating is the TE First-Order Mode in multimode waveguide the incident light reverse coupled meeting phase-matching condition wavelength, reflected light, by being converted into the TE mould of lower road single mode waveguide during lower road Asymmetry Y furcation waveguide, exports from lower terminal, and do not meet the transmitted light of phase-matching condition wavelength, by setting out on a journey Asymmetry Y furcation waveguide, export from single-mode output waveguide, same, set out on a journey light from singlemode input waveguide input of setting out on a journey, Asymmetry Y furcation waveguide of setting out on a journey is converted into the TE First-Order Mode of multimode waveguide, antisymmetry Bragg waveguide grating is the TE basic mode in multimode waveguide the light reverse coupled of setting out on a journey meeting phase-matching condition wavelength, reflected light by set out on a journey Asymmetry Y furcation waveguide time be converted into the TE mould of single-mode output waveguide, export from the output terminal of single-mode output waveguide, the present invention achieves signal upper and lower road function simultaneously, there is structure simple, compact dimensions and the advantage such as tolerance is large, manufacture craft has CMOS technology compatibility, be easy to integrated and expansion, facilitate low cost manufacture, can be applicable to superintegrated optical interconnection system on sheet.
The invention has the beneficial effects as follows:
1, achieve upper and lower road optical filter function in conjunction with Asymmetry Y furcation waveguide and antisymmetry Bragg waveguide grating, there is the features such as the little and tolerance of Insertion Loss is large.
2, device layout structure is simple, compact dimensions.
3, device making technics has CMOS technology compatibility, makes device be easy to integrated and expansion, facilitates low cost manufacture, can be widely used in superintegrated light network communication system on sheet.
Accompanying drawing explanation
Fig. 1 is structural drawing of the present invention;
Fig. 2 is the sectional view of slab waveguide in Fig. 1;
Fig. 3 is the periodic unit schematic shapes of Bragg waveguide grating in Fig. 1;
Fig. 4 is the vertical view of Bragg waveguide grating in Fig. 1;
Below in conjunction with drawings and Examples, the invention will be further described.
Identify in figure:
1, singlemode input waveguide 2, the Asymmetry Y furcation waveguide of lower road
3, multimode waveguide 4, antisymmetry Bragg waveguide grating
5, to set out on a journey Asymmetry Y furcation waveguide 6, single-mode output waveguide
7, lower road single mode waveguide 8, singlemode input waveguide of setting out on a journey.
Embodiment
As shown in Figure 1, a kind of path filter up and down based on antisymmetry multimode Bragg waveguide grating of the present invention, comprise singlemode input waveguide (1), lower road Asymmetry Y furcation waveguide (2), multimode waveguide (3), antisymmetry Bragg waveguide grating (4), to set out on a journey Asymmetry Y furcation waveguide (5), single-mode output waveguide (6), lower road single mode waveguide (7) and singlemode input waveguide of setting out on a journey (8), wherein singlemode input waveguide (1) is connected with lower road Asymmetry Y furcation waveguide (2) branch, lower road single mode waveguide (7) is connected with another branch of lower road Asymmetry Y furcation waveguide (2), the trunk of lower road Asymmetry Y furcation waveguide (2) is connected with one end of multimode waveguide (3), the other end of multimode waveguide (3) and the Truck Connection of Asymmetry Y furcation waveguide (5) of setting out on a journey, single-mode output waveguide (6) is connected with Asymmetry Y furcation waveguide (5) branch of setting out on a journey, singlemode input waveguide (8) of setting out on a journey is connected with another branch of Asymmetry Y furcation waveguide (5) of setting out on a journey, described antisymmetry Bragg waveguide grating (4) is positioned on multimode waveguide (3), distribute in antisymmetry, TE light inputs from singlemode input waveguide (1), lower road Asymmetry Y furcation waveguide (2) is converted into the TE basic mode of multimode waveguide, antisymmetry Bragg waveguide grating (4) is the TE First-Order Mode in multimode waveguide (3) the incident light reverse coupled meeting phase-matching condition wavelength, reflected light, by being converted into the TE mould on lower road single mode waveguide (7) time lower road Asymmetry Y furcation waveguide (2), exports from lower terminal, and do not meet the transmitted light of phase-matching condition wavelength, by setting out on a journey Asymmetry Y furcation waveguide (5), export from single-mode output waveguide (6), same, light of setting out on a journey inputs from singlemode input waveguide of setting out on a journey (8), Asymmetry Y furcation waveguide (5) of setting out on a journey is converted into the TE First-Order Mode of multimode waveguide (3), antisymmetry Bragg waveguide grating (4) is the TE basic mode in multimode waveguide (3) the light reverse coupled of setting out on a journey meeting phase-matching condition wavelength, reflected light by set out on a journey Asymmetry Y furcation waveguide (5) time be converted into the TE mould of single-mode output waveguide (6), export from the output terminal of single-mode output waveguide (6), the present invention achieves signal upper and lower road function simultaneously, there is structure simple, compact dimensions and the advantage such as tolerance is large, manufacture craft has CMOS technology compatibility, be easy to integrated and expansion, facilitate low cost manufacture, can be applicable to superintegrated optical interconnection system on sheet.
Two branches of described lower road Asymmetry Y furcation waveguide (2) are made up of the single mode waveguide that two width are different, the trunk of lower road Asymmetry Y furcation waveguide (2) is made up of a multimode waveguide, when the input pattern of singlemode input waveguide (1) is TE mould, this patten transformation is the TE basic mode of multimode waveguide by lower road Asymmetry Y furcation waveguide (2);
The structure of described Asymmetry Y furcation waveguide (5) of setting out on a journey is consistent with lower road Asymmetry Y furcation waveguide (2) structure, when the input pattern of singlemode input waveguide of setting out on a journey (8) is TE mould, this patten transformation is the TE First-Order Mode of multimode waveguide by lower road Asymmetry Y furcation waveguide (2);
The periodic refractive index perturbation district symmetry of described antisymmetry Bragg waveguide grating (4) is located on the dual-side of multimode waveguide (3), distributes in antisymmetry; When the TE basic mode that lambda1-wavelength meets phase-matching condition in the multimode waveguide (3) is by antisymmetry Bragg waveguide grating (4), be reversed the TE First-Order Mode being coupled as multimode waveguide (3), the reflected light of this TE First-Order Mode, by being converted into the TE mould on lower road single mode waveguide (7) time lower road Asymmetry Y furcation waveguide (2), exports from the output terminal on lower road single mode waveguide (7); And when the TE basic mode that multimode waveguide (3) medium wavelength does not meet phase-matching condition is by antisymmetry Bragg waveguide grating (4), this transmitted light can not be subject to the impact of antisymmetry Bragg waveguide grating (4), continue onwards transmission, by set out on a journey Asymmetry Y furcation waveguide (5) time, be converted into the TE mould of single-mode output waveguide (6), export from the output terminal of single-mode output waveguide (6); When light inputs from singlemode input waveguide of setting out on a journey (8), by set out on a journey Asymmetry Y furcation waveguide (5) time, be converted into the First-Order Mode of multimode waveguide (3), when the TE First-Order Mode that wavelength meets phase-matching condition is by antisymmetry Bragg waveguide grating (4), be reversed the TE basic mode being coupled as multimode waveguide (3), the reflected light of this TE basic mode by set out on a journey Asymmetry Y furcation waveguide (5) time, be converted into the TE mould of single-mode output waveguide (6), export from the output terminal of single-mode output waveguide (6).
As shown in Figure 1, Figure 3 and Figure 4, described antisymmetry Bragg waveguide grating (4) is formed by etching one dimension rectangular Periodic unit in waveguide, and the cycle of antisymmetry Bragg waveguide grating (4) meets the phase-matching condition of TE basic mode reverse coupled to TE First-Order Mode of multimode waveguide (3).
For meeting the requirement of multimode waveguide (3) TE mould reverse coupled to TE First-Order Mode, needing to design the Bragg waveguide grating cycle, can be obtained by following formula
(1)
In formula, Λ is screen periods,
for the propagation constant of multimode waveguide TE basic mode,
for the propagation constant of multimode waveguide TE single order pattern.
A kind of embodiment as shown in Figure 1, a kind of path filter up and down based on antisymmetry multimode Bragg waveguide grating of the present invention is made up of single mode waveguide, Asymmetry Y furcation waveguide, multimode waveguide and antisymmetry Bragg waveguide grating, and this device all constituents is all positioned at same plane.All single mode waveguides 1,6,7,8 in Fig. 1, Asymmetry Y furcation waveguide 2,5, multimode waveguide 3 and Bragg waveguide grating 4, all adopt the slab waveguide shown in Fig. 2.
Embodiment:
As Fig. 1, shown in Fig. 2 and Fig. 4, adopting top layer silicon thick is 220nm, silicon (SOI) material on the insulation course that buried silicon oxide layer is 2 μm, after completing crystal column surface cleaning, carry out deep-UV lithography or e-beam direct write lithography acquisition silicon etching mask, by silicon dry etching, produce is highly the slab waveguide of 220nm, wherein two bifurcated waveguide width of Asymmetry Y furcation waveguide are respectively 500nm and 400nm, trunk waveguide is wide is 900nm, the width of multimode waveguide is 900nm, the Bragg waveguide grating of the dual-side etching antisymmetry structure of multimode waveguide, rectangular raster tooth is 150nm, its cycle is 308nm, the length of Bragg waveguide grating is 300 μm.
Screen periods parameter in above-described embodiment is 1550nm for operation wavelength, 900nm width multimode slab waveguide design, device is also applicable to the multimode slab waveguide of other operation wavelength and width, also the slab waveguide of different top layer silicon thickness is applicable to, only need change the screen periods parameter that the size of graded guide is different with design, optical filter function can be realized.Whole device only need once etch can complete making.
Above-mentioned embodiment is used for explaining and the present invention is described, instead of limits the invention, and in the protection domain of spirit of the present invention and claim, any amendment make the present invention and change, all fall into protection scope of the present invention.
Claims (7)
1. the path filter up and down based on antisymmetry multimode Bragg waveguide grating, it is characterized in that: comprise singlemode input waveguide, the Asymmetry Y furcation waveguide of lower road, multimode waveguide, antisymmetry Bragg waveguide grating, to set out on a journey Asymmetry Y furcation waveguide, single-mode output waveguide, lower road single mode waveguide and singlemode input waveguide of setting out on a journey, wherein singlemode input waveguide is connected with lower road Asymmetry Y furcation waveguide one branch, lower road single mode waveguide is connected with another branch of lower road Asymmetry Y furcation waveguide, the trunk of lower road Asymmetry Y furcation waveguide is connected with one end of multimode waveguide, the other end of multimode waveguide and the Truck Connection of Asymmetry Y furcation waveguide of setting out on a journey, single-mode output waveguide is connected with Asymmetry Y furcation waveguide one branch of setting out on a journey, singlemode input waveguide of setting out on a journey is connected with another branch of Asymmetry Y furcation waveguide of setting out on a journey, described antisymmetry Bragg waveguide grating is positioned on multimode waveguide, distribute in antisymmetry.
2. a kind of path filter up and down based on antisymmetry multimode Bragg waveguide grating according to claim 1, is characterized in that: described singlemode input waveguide, Asymmetry Y furcation waveguide of setting out on a journey, multimode waveguide, the Asymmetry Y furcation waveguide of lower road, lower road single mode waveguide, set out on a journey singlemode input waveguide and single-mode output waveguide are slab waveguide.
3. a kind of path filter up and down based on antisymmetry multimode Bragg waveguide grating according to claim 2, it is characterized in that: two branches of described lower road Asymmetry Y furcation waveguide are made up of the single mode waveguide that two width are different, and the trunk of Asymmetry Y furcation waveguide is made up of multimode waveguide.
4. a kind of path filter up and down based on antisymmetry multimode Bragg waveguide grating according to claim 2, is characterized in that: described set out on a journey Asymmetry Y furcation waveguide and the Asymmetry Y furcation waveguide of lower road completely the same.
5. a kind of path filter up and down based on antisymmetry multimode Bragg waveguide grating according to claim 2, is characterized in that: the cycle of described antisymmetry Bragg waveguide grating meets the phase-matching condition TE basic mode in multimode waveguide and TE First-Order Mode mutually being occurred to be coupled.
6. a kind of path filter up and down based on antisymmetry multimode Bragg waveguide grating according to claim 2, is characterized in that: the periodic refractive index perturbation district of this antisymmetry Bragg waveguide grating is on the dual-side of multimode waveguide.
7. a kind of path filter up and down based on antisymmetry multimode Bragg waveguide grating according to claim 2, is characterized in that: the periodic unit shape of described formation Bragg waveguide grating is rectangle.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105759362A (en) * | 2016-05-13 | 2016-07-13 | 龙岩学院 | Band-pass and band-stop filter based on anti-symmetric multimode Bragg light guide grating |
| CN105866893A (en) * | 2016-06-08 | 2016-08-17 | 龙岩学院 | Optical add drop multiplexer based on antisymmetric multimode waveguide Bragg grating |
| CN105911646A (en) * | 2016-06-13 | 2016-08-31 | 南京邮电大学 | Wavelength division die division mixing multiplexing demultiplexer based on photonic crystal and method thereof |
| CN106099263A (en) * | 2016-05-25 | 2016-11-09 | 哈尔滨工程大学 | A kind of THz wave wave filter interacted based on forbidden band |
| CN106199836A (en) * | 2016-07-21 | 2016-12-07 | 浙江大学 | A kind of bandwidth tunable filter based on silica-based waveguides grating |
| CN109254351A (en) * | 2018-12-03 | 2019-01-22 | 浙江大学宁波理工学院 | A kind of path filter up and down based on single antisymmetry multimode period waveguide microcavity |
| CN109407209A (en) * | 2018-12-25 | 2019-03-01 | 龙岩学院 | A kind of light wave based on mode converter and Bragg waveguide grating divides mould to divide hybrid multiplex demultiplexer |
| CN109597161A (en) * | 2019-01-29 | 2019-04-09 | 龙岩学院 | A kind of apodization type bandpass and band-rejection filter of no chirp |
| CN112630995A (en) * | 2021-01-11 | 2021-04-09 | 东南大学 | Method for converting polarization state of optical signal by silicon-based polarization rotator |
| CN112928599A (en) * | 2021-02-07 | 2021-06-08 | 南京大学 | Single-chip integrated mode-tunable chaotic laser and manufacturing and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105759362A (en) * | 2016-05-13 | 2016-07-13 | 龙岩学院 | Band-pass and band-stop filter based on anti-symmetric multimode Bragg light guide grating |
| CN106099263B (en) * | 2016-05-25 | 2019-03-05 | 哈尔滨工程大学 | A kind of THz wave filter based on forbidden band interaction |
| CN106099263A (en) * | 2016-05-25 | 2016-11-09 | 哈尔滨工程大学 | A kind of THz wave wave filter interacted based on forbidden band |
| CN105866893B (en) * | 2016-06-08 | 2019-01-15 | 龙岩学院 | A kind of optical add/drop multiplexer based on antisymmetry multimode Bragg waveguide grating |
| CN105866893A (en) * | 2016-06-08 | 2016-08-17 | 龙岩学院 | Optical add drop multiplexer based on antisymmetric multimode waveguide Bragg grating |
| CN105911646A (en) * | 2016-06-13 | 2016-08-31 | 南京邮电大学 | Wavelength division die division mixing multiplexing demultiplexer based on photonic crystal and method thereof |
| CN105911646B (en) * | 2016-06-13 | 2018-08-21 | 南京邮电大学 | A kind of wavelength-division mould based on photonic crystal divides hybrid multiplex demultiplexer and method |
| CN106199836A (en) * | 2016-07-21 | 2016-12-07 | 浙江大学 | A kind of bandwidth tunable filter based on silica-based waveguides grating |
| CN109254351A (en) * | 2018-12-03 | 2019-01-22 | 浙江大学宁波理工学院 | A kind of path filter up and down based on single antisymmetry multimode period waveguide microcavity |
| CN109407209A (en) * | 2018-12-25 | 2019-03-01 | 龙岩学院 | A kind of light wave based on mode converter and Bragg waveguide grating divides mould to divide hybrid multiplex demultiplexer |
| CN109597161A (en) * | 2019-01-29 | 2019-04-09 | 龙岩学院 | A kind of apodization type bandpass and band-rejection filter of no chirp |
| CN112630995A (en) * | 2021-01-11 | 2021-04-09 | 东南大学 | Method for converting polarization state of optical signal by silicon-based polarization rotator |
| CN112928599A (en) * | 2021-02-07 | 2021-06-08 | 南京大学 | Single-chip integrated mode-tunable chaotic laser and manufacturing and control method thereof |
| CN114675371A (en) * | 2022-04-07 | 2022-06-28 | 嘉兴佳晔光子科技有限公司 | Fabry-Perot filter with asymmetric structure Bragg grating structure |
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