CN102590942B - Light path structure for integrated optical device - Google Patents
Light path structure for integrated optical device Download PDFInfo
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- CN102590942B CN102590942B CN201210093484.XA CN201210093484A CN102590942B CN 102590942 B CN102590942 B CN 102590942B CN 201210093484 A CN201210093484 A CN 201210093484A CN 102590942 B CN102590942 B CN 102590942B
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Abstract
The invention relates to a light path structure for an integrated optical device. The structure comprises a long straight waveguide, a linear widening waveguide, a first circular bent waveguide and a second circular bent waveguide, wherein one end of the linear widening waveguide is connected with the long straight waveguide, and the other end of the linear widening waveguide is respectively connected with the first circular bent waveguide and the second circular bent waveguide to form a 1*2 Y-shaped branched structure; the long straight waveguide is as wide as the initial node of the linear widening waveguide; the linear widening waveguide is extended to two sides by using the central line of the long straight waveguide as a center, and the tail end of the linear widening waveguide is divided into two sides which are respectively connected with the first circular bent waveguide and the second circular bent waveguide; the first circular bent waveguide and the second circular bent waveguide are bent to two sides by using the central line of the long straight waveguide as the center; the curvature radius of the first circular bent waveguide is 15,000 to 100,000 microns; and the curvature radius of the second circular bent waveguide is 15,000 to 100,000 microns. Compared with the prior art, the light path structure has the advantages of low loss, high efficiency and the like.
Description
Technical field
The invention belongs to integrated optics field, relate in particular to Y branched structure and the application of optical waveguide in a kind of glass-based integrated optics.
Background technology
On market, ADSL remains the main flow of broadband access network at home, but in broadband access aspect, follow-on network must be that Fiber to the home.This is because amalgamation business is had higher requirement to bandwidth.Optical fiber communication has bandwidth, capacity is large, unit bandwidth cost is low, can carry the features such as high-quality video, environmental protection, and its use can adapt to amalgamation business development needs better in access link.Internal optical fiber is accelerated gradually to the progress at family, and optical branching device is a basic device for EPON, and the demand of optical branching device will be larger when the time comes.
Summary of the invention
Object of the present invention is exactly to provide in order to overcome the defect that above-mentioned prior art exists the light path structure for integrated optical device that a kind of loss is low, efficiency is high.
Object of the present invention can be achieved through the following technical solutions: a kind of light path structure for integrated optical device, it is characterized in that, this structure comprises long straight wave guide, Linear expansion waveguide, the first circular arc curved waveguide, the second circular arc curved waveguide, described Linear expansion waveguide one end connects long straight wave guide, the other end connects respectively the first circular arc curved waveguide and the second circular arc curved waveguide, form 1 × 2 y-branch structure, the width of described long straight wave guide equates with the width of Linear expansion waveguide start node width, described Linear expansion waveguide is extended to both sides centered by the center line of long straight wave guide, and be divided into both sides at its end, connect respectively the first circular arc curved waveguide and the second circular arc curved waveguide, described the first circular arc curved waveguide and the second circular arc curved waveguide are complete to both sides centered by the center line of long straight wave guide, wherein the radius-of-curvature of the first circular arc curved waveguide is 15000～100000 μ m, the radius-of-curvature of the second described circular arc curved waveguide is 15000～100000 μ m.
The width of described long straight wave guide is 1.5～18 μ m, and length is 100～2000 μ m.
The length of described Linear expansion waveguide is 50～800 μ m, and the width of end is 3～40 μ m.
The width of the first described circular arc curved waveguide is 1.5～18 μ m, the starting point tangential direction of the first circular arc curved waveguide and the angle of horizontal direction are 0.1-1 degree, and the end tangential direction of the first circular arc curved waveguide and the angle of horizontal direction are 0.7-10 degree.
The width of the second described circular arc curved waveguide is 1.5～18 μ m, the starting point tangential direction of the second circular arc curved waveguide and the angle of horizontal direction are 0.1-1 degree, and the end tangential direction of the first circular arc curved waveguide and the angle of horizontal direction are 0.7-10 degree.
The first described circular arc curved waveguide and the radius-of-curvature of the second circular arc curved waveguide and width do not equate or not etc.
The first described circular arc curved waveguide and the end of the second circular arc curved waveguide respectively connect a described y-branch structure, form 1 × 4 branched structure, and continue to connect described y-branch structure at its end, form 1 × 8 branched structure, 1 × 16 branched structure, 1 × 32 branched structure, 1 × 64 branched structure, 1 × 128 branched structure or 1 × 256 branched structure.
Compared with prior art, Y branched structure of the present invention is mainly used in the equal division and combination ripple of luminous energy.This structure comprises an input end and two output terminals.Input end is propagated the luminous energy of coming for other light path of receiving front-end.Two output terminals propagate the luminous energy being divided into two to follow-up light path, to complete other object or function.This Y branched structure is connected successively, can obtain 1 × 4,1 × 8,1 × 16,1 × 32,1 × 64,1 × 128,1 × 256 functional device.Compared with common branched structure, Y branched structure of the present invention, when guaranteeing that light wave transmissions loss is low, the geometric shape parameters of light path is more flexible and changeable, according to reasonable arrangement, can effectively shorten 1 × 4,1 × 8,1 × 16,1 × 32,1 × 64, the length of 1 × 128,1 × 256 functional device.
Accompanying drawing explanation
Fig. 1 is existing y-branch structural representation;
Fig. 2 is light path structure for integrated optical device schematic diagram of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
As shown in Figure 2, a kind of light path structure for integrated optical device, this structure is by long straight wave guide 201, and Linear expansion waveguide 202, the first circular arc curved waveguides 203 and the second circular arc curved waveguide 211 form.Long straight wave guide 201 is as input end, and node P215 is the end of long straight wave guide 201, and the length of long straight wave guide 201 is L211, and width is W204.The start node of Linear expansion waveguide 202 is P215, and terminal node is P216, and length is L205, and the width of end is W212.The start node of the first circular arc curved waveguide 203 and the second circular arc curved waveguide 211 is respectively P217 and P218, node P217 and node P218 are positioned on the border of Linear expansion waveguide 202 one end, end, the radius-of-curvature that the radius-of-curvature of the first circular arc curved waveguide 203 is respectively R219 and the second circular arc curved waveguide 211 is R208, the width of the first circular arc curved waveguide 203 is W213, and the width of the second circular arc curved waveguide 211 is W214.Angle A 209 is that the first circular arc curved waveguide 203 is at the tangential direction at node P217 place and the angle of horizontal direction.Angle A 210 is the first circular arc curved waveguide 203 angles in tangential direction and the horizontal direction at place, end.Angle A 220 is that the second circular arc curved waveguide 211 is at the tangential direction at node P218 place and the angle of horizontal direction.Angle A 221 is the second circular arc curved waveguide 211 angles in tangential direction and the horizontal direction at place, end.
Wherein: the width W 204 of long straight wave guide 201 is 12 μ m, length L 211 is 800 μ m; The length L 205 of Linear expansion waveguide 202 is 200 μ m, and the width W 212 of end is 24 μ m; The radius of curvature R 219 of the first circular arc curved waveguide 203 is 20000 μ m, and width W 213 is 12 μ m, and starting point angle A 209 is 0.3 degree, and angle at the end A210 is 1.5 degree.The radius of curvature R 208 of the second circular arc curved waveguide 211 is 20000 μ m, and width W 214 is 12 μ m, and starting point angle A 220 is 0.3 degree, and angle at the end A221 is 1.5 degree.Radius-of-curvature and the width of the first circular arc curved waveguide 203 and the second circular arc curved waveguide 211 can be unequal.The distance that the end of the second circular arc curved waveguide 211 departs from Y branch center line is W207, and meets
(W207)＝(R208)·[cos(A220)-cos(A221)] (1)
The distance that the end of the second circular arc curved waveguide 211 departs from node P215 is in the horizontal direction L206, and meets
(L206)＝(L205)+(R208)·[sin(A221)-sin(A220)] (2)
As shown in Figure 1, be a kind of prevailing Y branched structure, it is by as the long straight wave guide 101 of input port, and two straight wave guide outputs 102 and straight wave guide 112 form, and the length of long straight wave guide 101 is L108, and width is W103, and endpoint node is P112.The length of straight wave guide 102 is L109, and width is W110, with the angle of horizontal direction be A105.The distance that the end of output port departs from Y branch center line is W107, and meets
(W107)＝(L109)·sin(A105) (3)
The distance that the end of output port departs from node P112 is in the horizontal direction L106, and meets
(L106)＝(L109)·cos(A105) (4)
From above 4 formulas, relatively can know, in the situation that guaranteeing that loss ratio is lower, when horizontal broadening W207 equates with W107, L206 can be less than L106, and it represents that y-branch structure of the present invention is when laterally broadening amount is identical, and length can be less.
Embodiment 2
Wherein: the width W 204 of long straight wave guide 201 is 1.5 μ m, length L 211 is 100 μ m; The length L 205 of Linear expansion waveguide 202 is 50 μ m, and the width W 212 of end is 3 μ m; The radius of curvature R 219 of the first circular arc curved waveguide 203 is 15000 μ m, and width W 213 is 1.5 μ m, and starting point angle A 209 is 0.1 degree, and angle at the end A210 is 0.7 degree.The radius of curvature R 208 of the second circular arc curved waveguide 211 is 15000 μ m, and width W 214 is 1.5 μ m, and starting point angle A 220 is 0.1 degree, and angle at the end A221 is 0.7 degree.The radius-of-curvature of the first circular arc curved waveguide 203 and the second circular arc curved waveguide 211 and width equate.At the first circular arc curved waveguide 203, be respectively connected respectively a y-branch structure with the second circular arc curved waveguide 211 ends more again, form one one and be divided into the four i.e. branched structures of (1 × 4), all the other are with embodiment 1.
Embodiment 3
Wherein: the width W 204 of long straight wave guide 201 is 18 μ m, length L 211 is 2000 μ m; The length L 205 of Linear expansion waveguide 202 is 800 μ m, and the width W 212 of end is 40 μ m; The radius of curvature R 219 of the first circular arc curved waveguide 203 is 100000 μ m, and width W 213 is 18 μ m, and starting point angle A 209 is 1 degree, and angle at the end A210 is 10 degree.The radius of curvature R 208 of the second circular arc curved waveguide 211 is 100000 μ m, and width W 214 is 18 μ m, and starting point angle A 220 is 1 degree, and angle at the end A221 is 10 degree.The radius-of-curvature of the first circular arc curved waveguide 203 and the second circular arc curved waveguide 211 and width equate.At the first circular arc curved waveguide 203, be respectively connected again respectively a y-branch structure with the second circular arc curved waveguide 211 ends again, and continue y-branch structure of each connection at the end of four new circular arc curved waveguides, form one one and be divided into the eight i.e. branched structures of (1 × 8), all the other are with embodiment 1.
Embodiment 4
Wherein: the width W 204 of long straight wave guide 201 is 10 μ m, length L 211 is 1000 μ m; The length L 205 of Linear expansion waveguide 202 is 500 μ m, and the width W 212 of end is 22 μ m; The radius of curvature R 219 of the first circular arc curved waveguide 203 is 50000 μ m, and width W 213 is 10 μ m, and starting point angle A 209 is 0.5 degree, and angle at the end A210 is 5 degree.The radius of curvature R 208 of the second circular arc curved waveguide 211 is 60000 μ m, and width W 214 is 12 μ m, and starting point angle A 220 is 0.5 degree, and angle at the end A221 is 5 degree.Radius-of-curvature and the width of the first circular arc curved waveguide 203 and the second circular arc curved waveguide 211 are unequal.All the other are with embodiment 1.
The present invention is used in to glass-based optical branching-device chip, also can forms 1 × 16 branched structure, 1 × 32 branched structure, 1 × 64 branched structure, 1 × 128 branched structure or branched structure of 1 × 256 etc.And rationally adjust the parameter of its branched structure, can shorten device overall length.
Claims (3)
1. a light path structure for integrated optical device, it is characterized in that, this structure comprises long straight wave guide, Linear expansion waveguide, the first circular arc curved waveguide, the second circular arc curved waveguide, described Linear expansion waveguide one end connects long straight wave guide, the other end connects respectively the first circular arc curved waveguide and the second circular arc curved waveguide, form 1 × 2 y-branch structure, the width of described long straight wave guide equates with the width of Linear expansion waveguide start node width, described Linear expansion waveguide is extended to both sides centered by the center line of long straight wave guide, and be divided into both sides at its end, connect respectively the first circular arc curved waveguide and the second circular arc curved waveguide, the first described circular arc curved waveguide and the second circular arc curved waveguide centered by the center line of long straight wave guide to two lateral bends, wherein the radius-of-curvature of the first circular arc curved waveguide is 15000～100000 μ m, the radius-of-curvature of the second described circular arc curved waveguide is 15000～100000 μ m,
The length of described Linear expansion waveguide is 50～800 μ m, and the width of end is 3～40 μ m;
The width of the first described circular arc curved waveguide is 1.5～18 μ m, the starting point tangential direction of the first circular arc curved waveguide and the angle of horizontal direction are 0.1-1 degree, and the end tangential direction of the first circular arc curved waveguide and the angle of horizontal direction are 0.7-10 degree;
The width of the second described circular arc curved waveguide is 1.5～18 μ m, the starting point tangential direction of the second circular arc curved waveguide and the angle of horizontal direction are 0.1-1 degree, and the end tangential direction of the second circular arc curved waveguide and the angle of horizontal direction are 0.7-10 degree;
The width of described long straight wave guide is 1.5～18 μ m, and length is 100～2000 μ m.
2. a kind of light path structure for integrated optical device according to claim 1, is characterized in that, the first described circular arc curved waveguide and the radius-of-curvature of the second circular arc curved waveguide and width do not equate or not etc.
3. a kind of light path structure for integrated optical device according to claim 1, it is characterized in that, the first described circular arc curved waveguide and the end of the second circular arc curved waveguide respectively connect a described y-branch structure, form 1 × 4 branched structure, and continue to connect described y-branch structure at its end, form 1 × 8 branched structure, 1 × 16 branched structure, 1 × 32 branched structure, 1 × 64 branched structure, 1 × 128 branched structure or 1 × 256 branched structure.
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| CN1580839A (en) * | 2003-08-05 | 2005-02-16 | 昭和电线电缆株式会社 | Optical branch waveguide |
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| JPH07198972A (en) * | 1993-12-28 | 1995-08-01 | Hitachi Cable Ltd | Y branch optical waveguide |
| JP2007293097A (en) * | 2006-04-26 | 2007-11-08 | Covalent Materials Corp | Y-branched optical waveguide |
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| CN1580839A (en) * | 2003-08-05 | 2005-02-16 | 昭和电线电缆株式会社 | Optical branch waveguide |
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Effective date of registration: 20180427 Address after: 215400 38 Qingdao West Road, Taicang Economic Development Zone, Suzhou, Jiangsu Patentee after: Suzhou light mantle integrated optics Co., Ltd. Address before: 200072 Room 102, 14 Lane 777, Guang Zhong Road, Zhabei District, Shanghai. Patentee before: Shanghai Guangxin Integrated Optical Co., Ltd. Co., Ltd. |
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Effective date of registration: 20200527 Address after: 213000 Jiangsu province west of the city of Changzhou Taihu science and Technology Industrial Park Dragon Road No. 2 Patentee after: Changzhou optical core integrated optics Co., Ltd Address before: 215400 Taicang Economic Development Zone, Jiangsu, Qingdao West Road, No. 38, No. Patentee before: SUZHOU OPTICORE INTEGRATED OPTICAL Co.,Ltd. |