CN106772796A - Ultra wide bandwidth 3dB based on trapezoidal waveguide directional coupler points of bundling device and method - Google Patents
Ultra wide bandwidth 3dB based on trapezoidal waveguide directional coupler points of bundling device and method Download PDFInfo
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- CN106772796A CN106772796A CN201611158281.9A CN201611158281A CN106772796A CN 106772796 A CN106772796 A CN 106772796A CN 201611158281 A CN201611158281 A CN 201611158281A CN 106772796 A CN106772796 A CN 106772796A
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- trapezoidal
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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
- G02B6/122—Basic optical elements, e.g. light-guiding paths
-
- 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
- G02B6/122—Basic optical elements, e.g. light-guiding paths
- G02B6/125—Bends, branchings or intersections
-
- 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
- G02B2006/12133—Functions
- G02B2006/12147—Coupler
-
- 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
- G02B2006/12133—Functions
- G02B2006/1215—Splitter
Abstract
The invention discloses a kind of ultra wide bandwidth 3dB based on trapezoidal waveguide directional coupler points of bundling device and method, it is related to optic communication device field.The 3dB point bundling devices include axial symmetry waveguide, the first trapezoidal waveguide, the second trapezoidal waveguide, the first curved waveguide, the second curved waveguide, and the symmetry axis of axial symmetry waveguide is parallel with the direction of propagation, axial symmetry waveguide directional couple area gradually constriction to one fixed width；First trapezoidal waveguide, the second trapezoidal waveguide are arranged symmetrically in the both sides of axial symmetry waveguide, and in directional couple area, the first trapezoidal waveguide, the width of the second trapezoidal waveguide are gradually widened；First curved waveguide is connected with the first trapezoidal waveguide, and junction width is equal；Second curved waveguide is connected with the second trapezoidal waveguide, and junction width is equal；First curved waveguide, the second curved waveguide are arranged symmetrically along the symmetry axis of axial symmetry waveguide.The present invention can realize covering the ultra wide bandwidth 3dB division beams of optic communication O wave bands to U wave band, it is not necessary to lithographic accuracy very high.
Description
Technical field
The present invention relates to optic communication device field, a kind of ultra wide band based on trapezoidal waveguide directional coupler is specifically related to
3dB wide points of bundling device and method.
Background technology
Ultra wide bandwidth 3dB point bundling devices are an important devices of the application such as palarization multiplexing in optic communication.Use at present
3dB beam splitters mainly have：Y-branch 3dB beam splitters, 1 × 2 multi-mode interferometer, 3 waveguide beam splitters based on evanescent field.
Although Y-branch 3dB beam splitters can realize the 3dB beam splitting of ultra wide bandwidth, due to there is important fine knot
Structure, so needing machining accuracy very high, cost is very high.
The major defect of 1 × 2 multi-mode interferometer is bandwidth not wide, it is necessary to be separately designed for different-waveband.
3 waveguide beam splitters based on evanescent field apply 3 trapezoidal waveguides, and incident waveguide is narrowed to fairly small journey
Degree, makes light enter two outgoing waveguides after revealing, although this structure can be made very short, there is also important fine knot
Structure, so being also required to machining accuracy very high, cost is very high.
Therefore, existing 3dB points of bundling device needs machining accuracy, high processing costs very high, or narrower bandwidth.
The content of the invention
The invention aims to overcome the shortcomings of above-mentioned background technology, there is provided one kind is based on trapezoidal waveguide directional couple
The ultra wide bandwidth 3dB of device points of bundling device and method, can realize covering the ultra wide bandwidth 3dB divisions of optic communication O wave bands to U wave band
Beam, and need not be very high lithographic accuracy, process complexity is low, low cost.
The present invention provides a kind of ultra wide bandwidth 3dB based on trapezoidal waveguide directional coupler points of bundling device, the 3dB division beams
Device includes axial symmetry waveguide, the first trapezoidal waveguide, the second trapezoidal waveguide, the first curved waveguide, the second curved waveguide, axial symmetry ripple
The symmetry axis led is parallel with the direction of propagation, axial symmetry waveguide directional couple area gradually constriction to one fixed width；First trapezoidal wave
Lead, the second trapezoidal waveguide is arranged symmetrically in the both sides of axial symmetry waveguide, it is the first trapezoidal waveguide, second trapezoidal in directional couple area
The width of waveguide is gradually widened；First curved waveguide is connected with the first trapezoidal waveguide, and junction width is equal；Second bending wave
Lead and be connected with the second trapezoidal waveguide, junction width is equal；First curved waveguide, the second curved waveguide are right along axial symmetry waveguide
Claim axial symmetry arrangement.
On the basis of above-mentioned technical proposal, incident light is incident by 3dB points of one end of bundling device, into axial symmetry waveguide,
In directional couple area, symmetrical is coupled in the first trapezoidal waveguide and the second trapezoidal waveguide；When the first trapezoidal waveguide and the second ladder
During the length long enough of shape waveguide, coupling process is adiabatic, that is, realize the ultra wide bandwidth of covering optic communication O wave bands to U wave band
Coupling；Light in first trapezoidal waveguide is drawn by the first curved waveguide, and the light in the second trapezoidal waveguide is by the second curved waveguide
Draw, finally from the 3dB points of other end outgoing of bundling device, realize the 3dB of covering optic communication O wave bands to the ultra wide bandwidth of U wave band
Beam splitting.
On the basis of above-mentioned technical proposal, incident light is incident by the 3dB points of other end of bundling device, respectively enters first curved
Bent waveguide, the second curved waveguide, the light in the first curved waveguide are incided in the first trapezoidal waveguide, the light in the second curved waveguide
Incide in the second trapezoidal waveguide, the light in the first trapezoidal waveguide, the second trapezoidal waveguide is gradually coupled to axle in communication process
In symmetrical waveguide, when the length long enough of the first trapezoidal waveguide and the second trapezoidal waveguide, coupling process is adiabatic, that is, realize
Cover the coupling of optic communication O wave bands to the ultra wide bandwidth of U wave band；Finally from axial symmetry waveguide left end outgoing, realize that covering light leads to
Believe the 3dB conjunction beams of O wave bands to the ultra wide bandwidth of U wave band.
On the basis of above-mentioned technical proposal, the axial symmetry waveguide directional couple area gradually constriction to not less than make
The minimum width for making line width of technique.
On the basis of above-mentioned technical proposal, in directional couple area, first trapezoidal waveguide, the width of the second trapezoidal waveguide
Spend and gradually widen by not less than the minimum width for making line width of manufacture craft.
The present invention also provides a kind of application in the above-mentioned 3dB points of ultra wide band based on trapezoidal waveguide directional coupler of bundling device
3dB divisions Shu Fangfa wide, comprises the following steps：
Incident light is incident by 3dB points of one end of bundling device, into axial symmetry waveguide, in directional couple area, symmetrical coupling
To in the first trapezoidal waveguide and the second trapezoidal waveguide；When the length long enough of the first trapezoidal waveguide and the second trapezoidal waveguide, coupling
Conjunction process is adiabatic, that is, realize the coupling of covering optic communication O wave bands to the ultra wide bandwidth of U wave band；In first trapezoidal waveguide
Light is drawn by the first curved waveguide, and the light in the second trapezoidal waveguide is drawn by the second curved waveguide, finally divides bundling device from 3dB
Other end outgoing, realizes the 3dB beam splitting of covering optic communication O wave bands to the ultra wide bandwidth of U wave band；
Incident light is incident by the 3dB points of other end of bundling device, respectively enters the first curved waveguide, the second curved waveguide, the
Light in one curved waveguide is incided in the first trapezoidal waveguide, and the light in the second curved waveguide is incided in the second trapezoidal waveguide,
During light in first trapezoidal waveguide, the second trapezoidal waveguide is gradually coupled to axial symmetry waveguide in communication process, when first trapezoidal
During the length long enough of waveguide and the second trapezoidal waveguide, coupling process is adiabatic, that is, realize covering optic communication O wave bands to U ripples
The coupling of the ultra wide bandwidth of section；Finally from axial symmetry waveguide left end outgoing, the ultra-wide of covering optic communication O wave bands to U wave band is realized
The 3dB of bandwidth closes beam.
On the basis of above-mentioned technical proposal, the axial symmetry waveguide directional couple area gradually constriction to not less than make
The minimum width for making line width of technique.
On the basis of above-mentioned technical proposal, in directional couple area, first trapezoidal waveguide, the width of the second trapezoidal waveguide
Spend and gradually widen by not less than the minimum width for making line width of manufacture craft.
Compared with prior art, advantages of the present invention is as follows：
(1) the axial symmetry waveguide in the present invention directional couple area gradually constriction to one fixed width；First trapezoidal waveguide,
Two trapezoidal waveguides are arranged symmetrically in the both sides of axial symmetry waveguide, and the first trapezoidal waveguide, the width of the second trapezoidal waveguide gradually add
It is wide；First curved waveguide is connected with the first trapezoidal waveguide, and junction width is equal；Second curved waveguide and the second trapezoidal waveguide connect
Connect, junction width is equal；First curved waveguide, the second curved waveguide are arranged symmetrically along the symmetry axis of axial symmetry waveguide.Work as coupling
When closing the length long enough in area, duct width change is relatively slow, and coupling process is adiabatic, you can realize covering optic communication O wave bands
To the coupling of the ultra wide bandwidth of U wave band.
(2) device does not exist fine size, it is not necessary to which lithographic accuracy very high, process complexity is low, and tolerance is big, yield rate
Height, low cost.
Brief description of the drawings
Fig. 1 is the ultra wide bandwidth 3dB points of vertical view of bundling device based on trapezoidal waveguide directional coupler in the embodiment of the present invention
Figure.
Fig. 2 is the front view of Fig. 1.
Fig. 3 is sectional views of the Fig. 1 along A-A directions.
Fig. 4 is sectional views of the Fig. 1 along B-B directions.
Reference：1- axial symmetry waveguides, the trapezoidal waveguides of 2- first, the trapezoidal waveguides of 3- second, the curved waveguides of 4- first, 5-
Second curved waveguide.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in further detail.
Shown in Figure 1, the embodiment of the present invention provides a kind of the ultra wide bandwidth 3dB based on trapezoidal waveguide directional coupler points
Bundling device, including axial symmetry waveguide 1, the first trapezoidal waveguide 2, the second trapezoidal waveguide 3, the first curved waveguide 4, the second curved waveguide
5, the symmetry axis of axial symmetry waveguide 1 is parallel with the direction of propagation, axial symmetry waveguide 1 directional couple area gradually constriction to a fixed width
Degree；First trapezoidal waveguide 2, the second trapezoidal waveguide 3 are arranged symmetrically in the both sides of axial symmetry waveguide 1, in directional couple area, the first ladder
Shape waveguide 2, the width of the second trapezoidal waveguide 3 are gradually widened；First curved waveguide 4 is connected with the first trapezoidal waveguide 2, junction
Width is equal；Second curved waveguide 5 is connected with the second trapezoidal waveguide 3, and junction width is equal；First curved waveguide 4, second is curved
Bent waveguide 5 is arranged symmetrically along the symmetry axis of axial symmetry waveguide 1.
The embodiment of the present invention also provides a kind of apply in above-mentioned 3dB point bundling devices based on trapezoidal waveguide directional coupler
Ultra wide bandwidth 3dB division Shu Fangfa, comprise the following steps：
Incident light is incident by 3dB points of one end of bundling device, into axial symmetry waveguide 1, in directional couple area, symmetrical coupling
To in the first trapezoidal waveguide 2 and the second trapezoidal waveguide 3；When the first trapezoidal waveguide 2 and the length long enough of the second trapezoidal waveguide 3
When, coupling process is adiabatic, you can realize the coupling of covering optic communication O wave bands to the ultra wide bandwidth of U wave band；First trapezoidal wave
The light led in 2 is drawn by the first curved waveguide 4, and the light in the second trapezoidal waveguide 3 is drawn by the second curved waveguide 5, finally from 3dB
Divide the other end outgoing of bundling device, realize the 3dB beam splitting of covering optic communication O wave bands to the ultra wide bandwidth of U wave band.
Incident light is incident by the 3dB points of other end of bundling device, respectively enters the first curved waveguide 4, the second curved waveguide 5,
Light in first curved waveguide 4 is incided in the first trapezoidal waveguide 2, and the light in the second curved waveguide 5 incides the second trapezoidal wave
Lead in 3, during the light in the first trapezoidal waveguide 2, the second trapezoidal waveguide 3 is gradually coupled to axial symmetry waveguide 1 in communication process, when
During the length long enough of the first trapezoidal waveguide 2 and the second trapezoidal waveguide 3, coupling process is adiabatic, you can realize that covering light leads to
Believe the coupling of O wave bands to the ultra wide bandwidth of U wave band；Finally from the left end outgoing of axial symmetry waveguide 1, covering optic communication O wave bands are realized
3dB to the ultra wide bandwidth of U wave band closes beam.
In actual applications, in directional couple area, gradually constriction makes to not less than manufacture craft is minimum for axial symmetry waveguide 1
The width of line width.In directional couple area, the first trapezoidal waveguide 2, the width of the second trapezoidal waveguide 3 are by not less than manufacture craft most
The width of little makings line width is gradually widened.
Those skilled in the art can carry out various modifications and variations to the embodiment of the present invention, if these modifications and change
Within the scope of the claims in the present invention and its equivalent technologies, then these modifications and modification are also in protection scope of the present invention for type
Within.
In the prior art that the content not described in detail in specification is known to the skilled person.
Claims (8)
1. a kind of ultra wide bandwidth 3dB based on trapezoidal waveguide directional coupler divides bundling device, it is characterised in that：The 3dB division beams
Device includes axial symmetry waveguide (1), the first trapezoidal waveguide (2), the second trapezoidal waveguide (3), the first curved waveguide (4), the second bending
Waveguide (5), the symmetry axis of axial symmetry waveguide (1) is parallel with the direction of propagation, and axial symmetry waveguide (1) is in directional couple area gradually constriction
To one fixed width；First trapezoidal waveguide (2), the second trapezoidal waveguide (3) are arranged symmetrically in the both sides of axial symmetry waveguide (1), fixed
To coupled zone, the first trapezoidal waveguide (2), the width of the second trapezoidal waveguide (3) are gradually widened；First curved waveguide (4) and the
One trapezoidal waveguide (2) is connected, and junction width is equal；Second curved waveguide (5) is connected with the second trapezoidal waveguide (3), junction
Width is equal；First curved waveguide (4), the second curved waveguide (5) are arranged symmetrically along the symmetry axis of axial symmetry waveguide (1).
2. the ultra wide bandwidth 3dB based on trapezoidal waveguide directional coupler as claimed in claim 1 divides bundling device, and its feature exists
In：Incident light is incident by 3dB points of one end of bundling device, and into axial symmetry waveguide (1), in directional couple area, symmetrical is coupled to
In first trapezoidal waveguide (2) and the second trapezoidal waveguide (3)；When the first trapezoidal waveguide (2) and the length foot of the second trapezoidal waveguide (3)
When enough long, coupling process is adiabatic, that is, realize the coupling of covering optic communication O wave bands to the ultra wide bandwidth of U wave band；First is trapezoidal
Light in waveguide (2) is drawn by the first curved waveguide (4), and the light in the second trapezoidal waveguide (3) is drawn by the second curved waveguide (5)
Go out, finally from the 3dB points of other end outgoing of bundling device, 3dB points of realization covering optic communication O wave bands to the ultra wide bandwidth of U wave band
Beam.
3. the ultra wide bandwidth 3dB based on trapezoidal waveguide directional coupler as claimed in claim 1 divides bundling device, and its feature exists
In：Incident light is incident by the 3dB points of other end of bundling device, respectively enters the first curved waveguide (4), the second curved waveguide (5), the
Light in one curved waveguide (4) is incided in the first trapezoidal waveguide (2), and the light in the second curved waveguide (5) incides the second ladder
In shape waveguide (3), the light in the first trapezoidal waveguide (2), the second trapezoidal waveguide (3) is gradually coupled to axial symmetry in communication process
In waveguide (1), when the length long enough of the first trapezoidal waveguide (2) and the second trapezoidal waveguide (3), coupling process be it is adiabatic,
Realize the coupling of covering optic communication O wave bands to the ultra wide bandwidth of U wave band；Finally from axial symmetry waveguide (1) left end outgoing, realize
Cover the 3dB conjunction beams of optic communication O wave bands to the ultra wide bandwidth of U wave band.
4. the ultra wide bandwidth 3dB based on trapezoidal waveguide directional coupler as claimed in claim 1 divides bundling device, and its feature exists
In：The axial symmetry waveguide (1) directional couple area gradually constriction to not less than the minimum width for making line width of manufacture craft.
5. the ultra wide bandwidth 3dB based on trapezoidal waveguide directional coupler as claimed in claim 1 divides bundling device, and its feature exists
In：In directional couple area, first trapezoidal waveguide (2), the width of the second trapezoidal waveguide (3) are by not less than manufacture craft most
The width of little makings line width is gradually widened.
6. it is a kind of to apply in 3dB described in the claim 1 points of ultra wide bandwidth 3dB based on trapezoidal waveguide directional coupler of bundling device
Division Shu Fangfa, it is characterised in that comprise the following steps：
Incident light is incident by 3dB points of one end of bundling device, and into axial symmetry waveguide (1), in directional couple area, symmetrical is coupled to
In first trapezoidal waveguide (2) and the second trapezoidal waveguide (3)；When the first trapezoidal waveguide (2) and the length foot of the second trapezoidal waveguide (3)
When enough long, coupling process is adiabatic, that is, realize the coupling of covering optic communication O wave bands to the ultra wide bandwidth of U wave band；First is trapezoidal
Light in waveguide (2) is drawn by the first curved waveguide (4), and the light in the second trapezoidal waveguide (3) is drawn by the second curved waveguide (5)
Go out, finally from the 3dB points of other end outgoing of bundling device, 3dB points of realization covering optic communication O wave bands to the ultra wide bandwidth of U wave band
Beam；
Incident light is incident by the 3dB points of other end of bundling device, respectively enters the first curved waveguide (4), the second curved waveguide (5),
Light in first curved waveguide (4) is incided in the first trapezoidal waveguide (2), and the light in the second curved waveguide (5) incides second
In trapezoidal waveguide (3), the light in the first trapezoidal waveguide (2), the second trapezoidal waveguide (3) is gradually coupled to axle pair in communication process
Claim in waveguide (1), when the length long enough of the first trapezoidal waveguide (2) and the second trapezoidal waveguide (3), coupling process is adiabatic
, that is, realize the coupling of covering optic communication O wave bands to the ultra wide bandwidth of U wave band；Finally from axial symmetry waveguide (1) left end outgoing,
Realize the 3dB conjunction beams of covering optic communication O wave bands to the ultra wide bandwidth of U wave band.
7. the ultra wide bandwidth 3dB division Shu Fangfa of trapezoidal waveguide directional coupler are based on as claimed in claim 6, and its feature exists
In：The axial symmetry waveguide (1) directional couple area gradually constriction to not less than the minimum width for making line width of manufacture craft.
8. the ultra wide bandwidth 3dB division Shu Fangfa of trapezoidal waveguide directional coupler are based on as claimed in claim 6, and its feature exists
In：In directional couple area, first trapezoidal waveguide (2), the width of the second trapezoidal waveguide (3) are by not less than manufacture craft most
The width of little makings line width is gradually widened.
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| CN201611158281.9A CN106772796A (en) | 2016-12-15 | 2016-12-15 | Ultra wide bandwidth 3dB based on trapezoidal waveguide directional coupler points of bundling device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594364A (en) * | 2018-04-23 | 2018-09-28 | 武汉邮电科学研究院有限公司 | Ultra wide bandwidth 3dB based on narrow slit wave-guide divides bundling device and method |
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| CN85200035U (en) * | 1985-04-01 | 1985-10-10 | 清华大学 | Directional coupler of a wide-band dielectric waveguide |
| CN101364660A (en) * | 2008-09-10 | 2009-02-11 | 中国科学技术大学 | Wideband directional coupler of PI type dielectric wave-guide |
| CN105467520A (en) * | 2015-12-15 | 2016-04-06 | 武汉邮电科学研究院 | Broadband polarization beam splitter/combiner based on gradient waveguide directional coupler |
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2016
- 2016-12-15 CN CN201611158281.9A patent/CN106772796A/en active Pending
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| CN85200035U (en) * | 1985-04-01 | 1985-10-10 | 清华大学 | Directional coupler of a wide-band dielectric waveguide |
| CN101364660A (en) * | 2008-09-10 | 2009-02-11 | 中国科学技术大学 | Wideband directional coupler of PI type dielectric wave-guide |
| CN105467520A (en) * | 2015-12-15 | 2016-04-06 | 武汉邮电科学研究院 | Broadband polarization beam splitter/combiner based on gradient waveguide directional coupler |
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| Title |
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| YANG WANG等: "Ultra-broadband and low-loss 3 dB optical power splitter based on adiabatic tapered silicon waveguides", 《OPTICS LETTERS》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594364A (en) * | 2018-04-23 | 2018-09-28 | 武汉邮电科学研究院有限公司 | Ultra wide bandwidth 3dB based on narrow slit wave-guide divides bundling device and method |
| CN108594364B (en) * | 2018-04-23 | 2019-11-05 | 武汉邮电科学研究院有限公司 | Ultra wide bandwidth 3dB based on narrow slit wave-guide divides bundling device and method |
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