CN102681089A - 2 * 2 asymmetric x-node coupling structure in 2 * N-typed chip of PLC (programmable logic controller) optical branching device - Google Patents
2 * 2 asymmetric x-node coupling structure in 2 * N-typed chip of PLC (programmable logic controller) optical branching device Download PDFInfo
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Abstract
The invention relates to 2 * 2 asymmetric x-node coupling structure in 2 * N-typed chip of a PLC (programmable logic controller) optical branching device. The coupling structure comprises a straight waveguide, a first input bent waveguide, a second input bent waveguide, a first output bent waveguide and a second output bent waveguide, wherein the first input bent waveguide, the second input bent waveguide, the first output bent waveguide and the second output bent waveguide are respectively connected at the two ends of the straight waveguide to form the 2 * 2 x-node coupling structure. The width of the second input bent waveguide is greater than that of the first input bent waveguide, and the radiuses of the curvature of the first input bent waveguide and the second input bent waveguide are equal or unequal. Compared with the prior art, the 2 * 2 asymmetric x-node coupling structure has the advantages that the coupling structure is short in length, excellent in bandwidth flatness and easy in integration.
Description
Technical field
The invention belongs to the integrated optics field, relate in particular to 2 * 2 asymmetric x knot coupled structure and application thereof of optical waveguide in a kind of glass-based integrated optics.
Background technology
Photo-coupler is a kind of device of using often in the optical communication network, is a kind of important passive device.What generally adopt at present is that fiber fuse draws the preparation of awl method.Two single-mode fibers are removed surrounding layer and coat, the sandwich layer that exposes is out drawn close, heating and melting at high temperature, and stretch to both sides.Such two sandwich layers are just close to each other to be reached about 10 μ m together, and luminous energy can be coupled mutually.Real-time testing in the manufacturing process is monitored splitting ratio in real time, according to feedback result control fused biconical taper process.
But the coupled apparatus that fiber fuse draws awl to make is long, if be used in 2 * 4,2 * 8,2 * 16,2 * 32,2 * 64,2 * 128, in 2 * 256 devices, then total device length can be very big.And the splitting ratio of this coupling mechanism is relevant with optical wavelength, and the bandwidth flatness is bad.
Summary of the invention
The object of the invention is exactly to provide a kind of length little for the defective that overcomes above-mentioned prior art existence, and the bandwidth flatness is good, is easy to the integrated optical waveguiding structure in the integrated PLC optical branching device chip.
The object of the invention can be realized through following technical scheme: 2 * 2 asymmetric x knot coupled structures in a kind of PLC optical branching device 2 * N cake core; It is characterized in that; This structure comprises straight wave guide; And the first input curved waveguide, the second input curved waveguide, the first output curved waveguide and second that the straight wave guide two ends connect are respectively exported curved waveguide; Constitute 2 * 2 X junction type coupled structure, the width of the described second input curved waveguide is greater than the width of the first input curved waveguide, and the radius-of-curvature of the described first input curved waveguide and the second input curved waveguide equates or do not wait.
The width of the described first input curved waveguide is 1.5～10 μ m, and radius-of-curvature is 200000～2000000 μ m, and the angle of starting point place and horizontal direction is 0.5～10 degree, terminal join with straight wave guide, and be 0 to spend at the angle of phase contact place and horizontal direction.
The width of the described second input curved waveguide is 2～20 μ m, and radius-of-curvature is 200000～2000000 μ m, and the angle of starting point place and horizontal direction is 0.5～10 degree, terminal join with straight wave guide, and be 0 to spend at the angle of phase contact place and horizontal direction.
The width of described straight wave guide is the width sum of the width and the first input curved waveguide of the second input curved waveguide; Length is 0～1000 μ m; The angle of straight wave guide and horizontal direction is 0 degree; The straight wave guide front end connects the first input curved waveguide and the second input curved waveguide, and the rear end connects the first output curved waveguide and the second output curved waveguide.
The width of described straight wave guide is 3.5～30 μ m.
The width of the described first output curved waveguide is 1.5～15 μ m, and radius-of-curvature is 15000～100000 μ m, and the angle of starting point place and horizontal direction is 0.1～1 degree, and terminal angle with horizontal direction is 0.7～20 degree.
The width of the described second output curved waveguide is 1.5～15 μ m, and radius-of-curvature is 15000～100000 μ m, and the angle of starting point place and horizontal direction is 0.1～1 degree, and terminal angle with horizontal direction is 0.7～20 degree.
The width of the described second output curved waveguide equals the width of the first output curved waveguide; And the width sum of the width of the first output curved waveguide and the second output curved waveguide equals the width of straight wave guide; The radius-of-curvature of the described second output curved waveguide equals the radius-of-curvature of the first output curved waveguide; The angle of described second output curved waveguide starting point place and horizontal direction equals the angle of the first output curved waveguide starting point place and horizontal direction, and the terminal angle with horizontal direction of the described second output curved waveguide equals the angle of the first output curved waveguide end and horizontal direction.
Compared with prior art, the present invention 2 * 2 asymmetric x tie coupled structures, are mainly used in the equal division and combination ripple of luminous energy, are the integrated optical waveguiding structures that is used in PLC optical branching device 2 * N cake core, and this structure comprises two input ends and two output terminals.Light can reach the function that is divided into two-beam from any input of two input ends.Two output terminals are propagated the luminous energy that is divided into two to follow-up light path, to accomplish other purpose or function.Should tie coupled structure as the first order by asymmetric x, the follow-up Y bifurcation structure that connects successively can obtain 2 * 4,2 * 8,2 * 16,2 * 32,2 * 64,2 * 128,2 * 256 functional devices.Compare (N=4,8,16,32,64,128,256) with common 1 * N device, input end is many one road alternate channel when fiber optic network has one tunnel fault, can switch to alternate channel and continue to use, and has improved the reliability of optical-fiber network.Structure of the present invention draws tapered photo-coupler to compare with fiber fuse, and it is little to have length, and the bandwidth flatness is good, is easy to integrated advantage.
2 * 2 coupling mechanisms of the PLC integrated optics chip type that the present invention releases, its advantage has: (1) loss is insensitive to optical wavelength transmission, can satisfy the transmission needs of different wave length; (2) beam split is even, can give the user with the signal uniform distribution; (3) compact conformation, volume is little, cooperates 1 * 2 Y bifurcated waveguide, can be designed to 2 * 4,2 * 8,2 * 16,2 * 32,2 * 64,2 * 128,2 * 256 devices such as grade, and the port number of single-chip is many; (5) the multichannel cost is low, divides way many more, and cost advantage is obvious more.
Description of drawings
Fig. 1 is 2 * 2 asymmetric x knot coupled structure synoptic diagram in PLC optical branching device 2 * N cake core of the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is elaborated.
Embodiment 1
As shown in Figure 1; Integrated optical waveguiding structure in a kind of PLC optical branching device 2 * N cake core; This structure comprises straight wave guide 111; And the first input curved waveguide 101, second that the straight wave guide two ends connect is respectively imported curved waveguide 106, the first output curved waveguide 114 and the second output curved waveguide 119, the X junction type coupled structure of formation 2 * 2.
The width W 102 of the described first input curved waveguide 101 is 1.5 μ m; Radius of curvature R 103 is 200000 μ m; The included angle A 104 of starting point place and horizontal direction is 0.5 degree, terminal is connected to a P105 mutually with straight wave guide, is 0 to spend at the angle of phase contact place and horizontal direction.
The width W 107 of the described second input curved waveguide 106 is 2 μ m, and radius of curvature R 108 is 200000 μ m, and the included angle A 109 of starting point place and horizontal direction is 0.5 degree, terminal is connected to a P110 mutually with straight wave guide, is 0 to spend at the angle of phase contact place and horizontal direction.The width W 107 of the described second input curved waveguide 106 is greater than the width W 102 of the first input curved waveguide 101, and the radius-of-curvature of the described first input curved waveguide 101 and the second input curved waveguide 106 equates.
The width W 112 of described straight wave guide 111 is the width W 107 of the second input curved waveguide 106 and width W 102 sums of the first input curved waveguide 101; The width W 112 that is straight wave guide 111 is 3.5 μ m; Length L 113 is 0 μ m; Straight wave guide 111 is 0 degree with the angle of horizontal direction, and straight wave guide 111 front ends connect the first input curved waveguide 101 and the second input curved waveguide 106, and the rear end connects the first output curved waveguide 114 and the second output curved waveguide 119.
The width W 115 of the described first output curved waveguide 114 is 1.75 μ m, and radius of curvature R 116 is 15000 μ m, and the included angle A 117 of starting point place and horizontal direction is 0.1 degree, and terminal included angle A 118 with horizontal direction is 0.7 degree.
The width W 120 of the described second output curved waveguide 119 is 1.75 μ m, and radius of curvature R 121 is 15000 μ m, and the included angle A 122 of starting point place and horizontal direction is 0.1 degree, and terminal included angle A 123 with horizontal direction is 0.7 degree.The width W 120 of the described second output curved waveguide 119 equals the width W 115 of the first output curved waveguide 114; And width W 120 sums of the width W 115 of the first output curved waveguide 114 and the second output curved waveguide 119 equal the width W 112 of straight wave guide 111; The radius of curvature R 121 of the described second output curved waveguide 119 equals the radius of curvature R 116 of the first output curved waveguide 114; The included angle A 122 of described second output curved waveguide 119 starting point places and horizontal direction equals the included angle A 117 of the first output curved waveguide 114 starting point places and horizontal direction, and the described second output curved waveguide, 119 terminal included angle A 123 with horizontal direction equal the included angle A 118 of the first output curved waveguide, 114 ends and horizontal direction.
Embodiment 2
Referring to shown in Figure 1; Integrated optical waveguiding structure in a kind of PLC optical branching device 2 * N cake core; This structure comprises straight wave guide 111; And the first input curved waveguide 101, second that the straight wave guide two ends connect is respectively imported curved waveguide 106, the first output curved waveguide 114 and the second output curved waveguide 119, the X junction type coupled structure of formation 2 * 2.
The width W 102 of the described first input curved waveguide 101 is 10 μ m, and radius of curvature R 103 is 2000000 μ m, and the included angle A 104 of starting point place and horizontal direction is 10 degree, terminal is connected to a P105 mutually with straight wave guide, is 0 to spend at the angle of phase contact place and horizontal direction.
The width W 107 of the described second input curved waveguide 106 is 20 μ m, and radius of curvature R 108 is 2000000 μ m, and the included angle A 109 of starting point place and horizontal direction is 10 degree, terminal is connected to a P110 mutually with straight wave guide, is 0 to spend at the angle of phase contact place and horizontal direction.
The width W 107 of the described second input curved waveguide 106 is greater than the width W 102 of the first input curved waveguide 101, and the radius-of-curvature of the described first input curved waveguide 101 and the second input curved waveguide 106 equates.
The width W 112 of described straight wave guide 111 is the width W 107 of the second input curved waveguide 106 and width W 102 sums of the first input curved waveguide 101; The width W 112 of described straight wave guide 111 is 30 μ m; Length L 113 is 1000 μ m; Straight wave guide 111 is 0 degree with the angle of horizontal direction, and straight wave guide 111 front ends connect the first input curved waveguide 101 and the second input curved waveguide 106, and the rear end connects the first output curved waveguide 114 and the second output curved waveguide 119.
The width W 115 of the described first output curved waveguide 114 is 15 μ m, and radius of curvature R 116 is 100000 μ m, and the included angle A 117 of starting point place and horizontal direction is 1 degree, and terminal included angle A 118 with horizontal direction is 20 degree.
The width W 120 of the described second output curved waveguide 119 is 15 μ m, and radius of curvature R 121 is 100000 μ m, and the included angle A 122 of starting point place and horizontal direction is 1 degree, and terminal included angle A 123 with horizontal direction is 20 degree.
The width W 120 of the described second output curved waveguide 119 equals the width W 115 of the first output curved waveguide 114; And width W 120 sums of the width W 115 of the first output curved waveguide 114 and the second output curved waveguide 119 equal the width W 112 of straight wave guide 111; The radius of curvature R 121 of the described second output curved waveguide 119 equals the radius of curvature R 116 of the first output curved waveguide 114; The included angle A 122 of described second output curved waveguide 119 starting point places and horizontal direction equals the included angle A 117 of the first output curved waveguide 114 starting point places and horizontal direction, and the described second output curved waveguide, 119 terminal included angle A 123 with horizontal direction equal the included angle A 118 of the first output curved waveguide, 114 ends and horizontal direction.
Embodiment 3
Wherein: the width W 102 of the first input curved waveguide 101 is 5 μ m, and radius of curvature R 103 is 1000000 μ m, and the included angle A 104 of starting point place and horizontal direction is 5 degree, terminal is connected to a P105 mutually with straight wave guide, is 0 to spend at the angle of phase contact place and horizontal direction.
The width W 107 of the described second input curved waveguide 106 is 10 μ m, and radius of curvature R 108 is 1500000 μ m, and the included angle A 109 of starting point place and horizontal direction is 5 degree, terminal is connected to a P110 mutually with straight wave guide, is 0 to spend at the angle of phase contact place and horizontal direction.
The width W 107 of the described second input curved waveguide 106 is greater than the width W 102 of the first input curved waveguide 101, and the radius-of-curvature of the described first input curved waveguide 101 and the second input curved waveguide 106 does not wait.
The width W 112 of described straight wave guide 111 is 15 μ m, and length L 113 is 500 μ m.
The width W 115 of the described first output curved waveguide 114 is 7.5 μ m, and radius of curvature R 116 is 50000 μ m, and the included angle A 117 of starting point place and horizontal direction is 0.5 degree, and terminal included angle A 118 with horizontal direction is 10 degree.
The width W 120 of the described second output curved waveguide 119 is 7.5 μ m, and radius of curvature R 121 is 50000 μ m, and the included angle A 122 of starting point place and horizontal direction is 0.5 degree, and terminal included angle A 123 with horizontal direction is 10 degree.All the other are with embodiment 1.
With the present invention as first order structure; The back connects the y-branch structure, can constitute 2 * 4 branched structure, 2 * 8 branched structure, 2 * 16 branched structure, 2 * 32 branched structure, 2 * 64 branched structure, 2 * 128 branched structure or branched structure of 2 * 256 or the like.And rationally adjust the parameter of its branched structure, can shorten the device overall length.
Claims (8)
1. 2 * 2 asymmetric x tie coupled structures in 2 * N cake core of a PLC optical branching device; It is characterized in that; This structure comprises straight wave guide; And straight wave guide the two ends first input curved waveguide, the second input curved waveguide, the first output curved waveguide and the second output curved waveguide that connect respectively, constituting 2 * 2 X junction type coupled structure, the width of the described second input curved waveguide is greater than the width of the first input curved waveguide.
2. 2 * 2 asymmetric x knot coupled structures in a kind of PLC optical branching device 2 * N cake core according to claim 1; It is characterized in that; The width of the described first input curved waveguide is 1.5～10 μ m, and radius-of-curvature is 200000～2000000 μ m, and the angle of starting point place and horizontal direction is 0.5～10 degree; Terminal joining with straight wave guide, is 0 to spend at the angle of phase contact place and horizontal direction.
3. 2 * 2 asymmetric x knot coupled structures in a kind of PLC optical branching device 2 * N cake core according to claim 1; It is characterized in that; The width of the described second input curved waveguide is 2～20 μ m, and radius-of-curvature is 200000～2000000 μ m, and the angle of starting point place and horizontal direction is 0.5～10 degree; Terminal joining with straight wave guide, is 0 to spend at the angle of phase contact place and horizontal direction.
4. 2 * 2 asymmetric x knot coupled structures in a kind of PLC optical branching device 2 * N cake core according to claim 1; It is characterized in that; The width of described straight wave guide is the width sum of the width and the first input curved waveguide of the second input curved waveguide, and length is 0～1000 μ m, and the angle of straight wave guide and horizontal direction is 0 degree; The straight wave guide front end connects the first input curved waveguide and the second input curved waveguide, and the rear end connects the first output curved waveguide and the second output curved waveguide.
5. 2 * 2 asymmetric x knot coupled structures in a kind of PLC optical branching device 2 * N cake core according to claim 4 is characterized in that the width of described straight wave guide is 3.5～30 μ m.
6. 2 * 2 asymmetric x knot coupled structures in a kind of PLC optical branching device 2 * N cake core according to claim 1; It is characterized in that; The width of the described first output curved waveguide is 1.5～15 μ m; Radius-of-curvature is 15000～100000 μ m, and the angle of starting point place and horizontal direction is 0.1～1 degree, and terminal angle with horizontal direction is 0.7～20 degree.
7. 2 * 2 asymmetric x knot coupled structures in a kind of PLC optical branching device 2 * N cake core according to claim 1; It is characterized in that; The width of the described second output curved waveguide is 1.5～15 μ m; Radius-of-curvature is 15000～100000 μ m, and the angle of starting point place and horizontal direction is 0.1～1 degree, and terminal angle with horizontal direction is 0.7～20 degree.
8. according to 2 * 2 asymmetric x knot coupled structures in claim 6 or the 7 described a kind of PLC optical branching device 2 * N cake cores; It is characterized in that; The width of the described second output curved waveguide equals the width of the first output curved waveguide; And the width sum of the width of the first output curved waveguide and the second output curved waveguide equals the width of straight wave guide; The radius-of-curvature of the described second output curved waveguide equals the radius-of-curvature of the first output curved waveguide; The angle of described second output curved waveguide starting point place and horizontal direction equals the angle of the first output curved waveguide starting point place and horizontal direction, and the terminal angle with horizontal direction of the described second output curved waveguide equals the angle of the first output curved waveguide end and horizontal direction.
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| CN2012101649763A CN102681089A (en) | 2012-05-24 | 2012-05-24 | 2 * 2 asymmetric x-node coupling structure in 2 * N-typed chip of PLC (programmable logic controller) optical branching device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616743A (en) * | 2013-12-11 | 2014-03-05 | 上海光芯集成光学股份有限公司 | Chip structure of PLC (programmable logic controller) multimode waveguide optical divider |
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| US5175778A (en) * | 1990-08-22 | 1992-12-29 | Gec-Marconi Limited | Integrated optic waveguide coupler with reduced wavelength sensitivity |
| CN1651950A (en) * | 2004-01-26 | 2005-08-10 | 林克斯光化网络公司 | High-tolerance broadband-optical switch in planar lightwave circuits |
| CN201057644Y (en) * | 2007-01-23 | 2008-05-07 | 东南大学 | Channel protection type optical branching device structure |
| CN101694535A (en) * | 2009-10-10 | 2010-04-14 | 浙江大学 | Cascade 2*N optical power divider |
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- 2012-05-24 CN CN2012101649763A patent/CN102681089A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5175778A (en) * | 1990-08-22 | 1992-12-29 | Gec-Marconi Limited | Integrated optic waveguide coupler with reduced wavelength sensitivity |
| CN1651950A (en) * | 2004-01-26 | 2005-08-10 | 林克斯光化网络公司 | High-tolerance broadband-optical switch in planar lightwave circuits |
| CN201057644Y (en) * | 2007-01-23 | 2008-05-07 | 东南大学 | Channel protection type optical branching device structure |
| CN101694535A (en) * | 2009-10-10 | 2010-04-14 | 浙江大学 | Cascade 2*N optical power divider |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616743A (en) * | 2013-12-11 | 2014-03-05 | 上海光芯集成光学股份有限公司 | Chip structure of PLC (programmable logic controller) multimode waveguide optical divider |
| CN103616743B (en) * | 2013-12-11 | 2015-12-30 | 上海光芯集成光学股份有限公司 | A kind of chip structure of PLC multimode waveguide optical branching device |
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Application publication date: 20120919 |