CN103901695A - Controllable light path converter - Google Patents
Controllable light path converter Download PDFInfo
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- CN103901695A CN103901695A CN201210571939.4A CN201210571939A CN103901695A CN 103901695 A CN103901695 A CN 103901695A CN 201210571939 A CN201210571939 A CN 201210571939A CN 103901695 A CN103901695 A CN 103901695A
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- photonic crystal
- optical path
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- photonic crystals
- path changer
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Abstract
The invention relates to a controllable light path converter. The controllable light path converter comprises first photonic crystals and second photonic crystals, wherein the first photonic crystals and the second photonic crystals are made of magneto-optic materials. Third photonic crystals made of non-magneto-optic materials are arranged between the first photonic crystals and the second photonic crystals. One one-way waveguide is formed between the third photonic crystals and the first photonic crystals form. The other one-way waveguide is formed between the third photonic crystals and the second photonic crystals. A defect cavity made of magneto-optic materials is formed in the third photonic crystals and is used as a magnetic control switch. The light path converter further comprises a magnetic field generator which is used for generating a magnetic field applied to the first photonic crystals, the second photonic crystals and the magnetic control switch. The controllable light path converter is little in loss, small in occupied space, convenient to integrate and flexible and convenient to operate.
Description
Technical field
The present invention relates to optical communication technique, in particular, relate to a kind of controllable type optical path changer.
Background technology
Optical path changer is the core parts of light interleaver (OXC); that OXC has concurrently is multiplexing, the multi-functional OTN transmission equipment of distribution, protection/recovery, monitoring and webmaster; can intersect to the signal of two-way; the configuration that makes optical-fiber network is more flexibly with less redundancy, in network, provides automatic traffic grooming.
Existing optical path changer normally utilizes optical fiber as core parts, light signal in multichannel light path is intersected mutually, but in light path, introduce optical fiber, can produce unavoidably light loss, affect the quality of signal transmission, and use optical fiber also will take the volume of whole optical-fiber network as the core component of OXC.
Summary of the invention
The object of the invention is to, larger for existing optical path changer loss, the more defect of volume taking, provides a kind of novel optical path changer, the above-mentioned defect to solve.
Solution of the above problems of the present invention is: a kind of controllable type optical path changer is provided, comprises the first photonic crystal and the second photonic crystal be made up of magneto-optic memory technique; Between the first photonic crystal and the second photonic crystal, be provided with the three-photon crystal that non-magneto-optic memory technique is made; Three-photon crystal and the first photonic crystal, the second photonic crystal form respectively one-way waveguide (ripple only can be propagated along a kind of direction in waveguide); In three-photon crystal, be also provided with the defect cavity of being made by magneto-optic memory technique, under controlling in magnetic field, play on-off action, below, for the purpose of clear, convenient, this magnetic defect cavity is called for short to magnetic switch; This optical path changer also comprises magnetic field generator, and magnetic field generator provides D.C. magnetic field to the first photonic crystal, the second photonic crystal and magnetic switch.
Controllable type optical path changer of the present invention, the first photonic crystal and the second photonic crystal are square lattice lattice structure, and three-photon crystal is and the square lattice lattice structure of the square lattice dot matrix angle at 45 ° of the first photonic crystal, the second photonic crystal.
Controllable type optical path changer of the present invention, the material that the first photonic crystal, the second photonic crystal and magnetic switch use is magneto-optic memory technique, comprises yttrium iron garnet or other magnet-optical medium; Medium post in three-photon crystal is non-magneto-optic memory technique, comprises aluminium or other high-index material.
Optical path changer of the present invention, the waveguide that three-photon crystal and the first photonic crystal, the second photonic crystal form is respectively linear pattern waveguide.
Controllable type optical path changer of the present invention, the waveguide that three-photon crystal and the first photonic crystal, the second photonic crystal form is respectively broken line type waveguide.
Controllable type optical path changer of the present invention, comprises the Manifold Light Way transducer that multiple the first photonic crystals and multiple the second photonic crystal are combined into.
Implement controllable type optical path changer of the present invention, do not use optical fiber as main assembly, the loss of its generation is little, the volume taking is little, in the time need to increasing optical path changer and carry out the cross processing of light signal as long as optical path changer of the present invention is increased in light path, without existing light path is changed on a large scale, operate flexible, convenient.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described in detail, wherein:
Fig. 1 is the structural representation of the first embodiment of controllable type optical path changer of the present invention;
Fig. 2 is that first embodiment of the invention sees through performance plot;
Fig. 3 is the laser propagation effect figure of first embodiment of the invention do not apply magnetic field on magnetic switch time;
Fig. 4 is that first embodiment of the invention is carried out the single channel laser propagation effect figure in when transmission;
Fig. 5 is the laser propagation effect figure that first embodiment of the invention is carried out single channel when transmission on another road;
Fig. 6 is first embodiment of the invention is carried out light chopper laser propagation effect figure to two-way transmission;
Fig. 7 is that second embodiment of the invention is carried out the single channel laser propagation effect figure in when transmission;
Fig. 8 is the laser propagation effect figure that second embodiment of the invention is carried out single channel when transmission on another road;
Fig. 9 is the laser propagation effect figure of second embodiment of the invention do not apply magnetic field on magnetic switch time;
Figure 10 is the laser propagation effect figure of third embodiment of the invention do not apply magnetic field on magnetic switch time;
Figure 11 is that third embodiment of the invention is carried out single channel first laser propagation effect figure in when transmission;
Figure 12 is that third embodiment of the invention is carried out single channel second laser propagation effect figure in when transmission;
Figure 13 is that third embodiment of the invention is carried out single channel the 3rd laser propagation effect figure in when transmission;
Figure 14 is that third embodiment of the invention is carried out the single channel four fundamental rules laser propagation effect figure in when transmission;
Figure 15 is that third embodiment of the invention is carried out single channel the 5th laser propagation effect figure in when transmission;
Figure 16 is that third embodiment of the invention is carried out single channel the 6th laser propagation effect figure in when transmission;
Figure 17 is the laser propagation effect figure of third embodiment of the invention while carrying out signal light chopper;
Figure 18 is the second item laser propagation effect figure of third embodiment of the invention while carrying out signal light chopper.
Figure 19 is the three item laser propagation effect figure of third embodiment of the invention while carrying out signal optical path change;
Figure 20 is the four fundamental rules laser propagation effect figure of third embodiment of the invention while carrying out signal light chopper;
Figure 21 is the Manifold Light Way transducer of the multiple module amalgamations of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Be illustrated in figure 1 the structural representation of the first embodiment of controllable type optical path changer of the present invention.In the present embodiment, optical path changer comprise the first photon crystal 1 00, the second photonic crystal 200 and be arranged on three-photon crystal 300, the three-photon crystal 300 between the two and the first photon crystal 1 00, the second photonic crystal 200 between form first wave guide 310 and the second waveguide 320.The first photon crystal 1 00, the second photonic crystal 200, three-photon crystal 300 are 2 D photon crystal, and the pillar of arranging by generating period type in two-dimensional flat plate forms.Two dimensional surface be XY institute in the plane.First wave guide 310 and the second waveguide 320 are linear pattern waveguide.
In the present embodiment, the first photon crystal 1 00 and the second photonic crystal 200 are the photonic crystal that yttrium iron garnet (Yttrium Iron Garnet, YIG) post forms, and are square lattice lattice structure, and radius is a
1=4.0 millimeters, grating constant is r
1=36.8 millimeters, specific inductive capacity is 15 ε
0(ε
0for permittivity of vacuum).Three-photon crystal 300 is the photonic crystal that aluminium (Al) pillar forms, and is also square lattice lattice structure, with the square lattice dot matrix angle at 45 ° of the first photonic crystal, the second photonic crystal.Grating constant r
3=26.0 millimeters, radius is a
2=3.9 millimeters, specific inductive capacity is taken as 10 ε
0.In three-photon crystal 300, on the position apart from common waveguide 310 and local waveguide 320 equal length, the cylinder being made up of YIG material is set, form magnetic switch 301, in magnetic switch 301, the radius of YIG cylinder is a
3=1.8 millimeters.
These are only the concrete size of the present embodiment, in the time of the signal transmission for different, above-mentioned a
1, a
2, a
3, r
1, r
3change etc. concrete numerical value adaptability.
If Fig. 2 is the transmission characteristic figure of the first embodiment, wherein signal is in first wave guide 311 port inputs, the implication of symbology in figure: straight line is while not applying magnetic field on magnetic switch 301, at the power transmission spectrum of 312 port gained; Triangle number expression is when having applied behind magnetic field on magnetic switch 301, and at the power transmission spectrum of 312 ports, and round dot and circle represent respectively when having applied behind magnetic field on magnetic switch 301, the power transmission spectrum of port 321 or 322 outputs.Figure is visible thus, and for the frequency of operation f0 of magnetic switch 301, in the time magnetic switch 301 not being applied to magnetic field, signal is propagated along first wave guide; In the time that magnetic switch 301 is applied to magnetic field, signal is coupled to the second waveguide by chamber.In the situation of the concrete material of the first embodiment and physical dimension, in the time that the magnetic field intensity on magnetic switch 301 is 900Oe, frequency of operation is 4.55GHz.The frequency of operation f0 of magnetic switch 301 is determined by its material, physical dimension and added magnetic field intensity, can design as required in practice.
Fig. 3 to Fig. 6 has provided the laser propagation effect figure of the first embodiment under different situations, and what Fig. 3 provided is at 311 and 321 ports input signal simultaneously, the laser propagation effect figure in the time not applying magnetic field on magnetic switch 301.Owing to now not applying magnetic field on magnetic switch 301, there is not light path converting in two signals, still propagates along former waveguide.
General, input signal in a waveguide therein, and add magnetic field on magnetic switch 301, can make the signal in waveguide be switched in another waveguide, as shown in Figure 4, Figure 5.When two paths of signals is during simultaneously in 311 and 321 ports input, these two signals are carried out light path simultaneously and switch to another waveguide and propagate.
The one-way waveguide that in above embodiment, photonic crystal forms is linear pattern, and the present invention is not limited to this, and the waveguide of fold-line-shaped can realize the light path converting of light signal too.Fig. 7 to Fig. 9 has provided second embodiment of the invention, the light chopper design sketch of fold-line-shaped waveguide.Fig. 7, Fig. 8 are signal transmission the laser propagation effect figure apply magnetic field in magnetic switch 301 time in single waveguide, and its laser propagation effect is similar to the effect of the first embodiment.Fig. 9 is not in the time that magnetic switch 301 applies magnetic field, and signal is along the design sketch of former waveguide.In order to realize the transmission of the signal in different port, below provide the second embodiment in the time that signal input part is first wave guide first end 311, the light chopper control table under different situations:
Table 1
In table 1, "+", "-" represent that respectively outside, the vertical paper of the vertical paper of magnetic direction is inside; " open ", " pass " represent whether on magnetic switch, apply magnetic field.
In the time using the linear pattern waveguide of the first embodiment, also there is similar light chopper control table.
The second embodiment is to carry out the splicing of multiple controllable type optical path changer than a benefit of the first embodiment.
Figure 10 is to Figure 20 shows that the third embodiment of the present invention, and the controllable type optical path changer of this embodiment is to be combined by the optical path changer of two the second embodiment.In order to describe each port, photonic crystal, magnetic switch in aspect, by its label, as shown in figure 10.
Table 2 provides when only having single signal in the time that port one is inputted, light chopper control table when signal is arrived to different port output by light chopper, and its laser propagation effect figure is as shown in Figure 10-Figure 15.
Table 2
The present embodiment also can be processed the light chopper while simultaneously there are multiple signals.For example, when existing when two signal sources, intersect at S2 place, and respectively in the time that 5,6,7 or 8 ports are exported corresponding signal, its light chopper control table is as shown in table 3, and accordingly design sketch as shown in Figure 16-Figure 20.
Table 3
In the time that the signal source applying is other ports, as long as make adaptability revision with reference to upper table.
Visible, the present invention has particularly preferred adaptability for the light chopper of multipath light signal: in the time need to increasing the light chopper of signal, as long as increase module, and the controllable type optical path changer of any multichannel, as shown in figure 21.
These are only the specific embodiment of the invention, can not limit scope of the present invention with this, equalization that those skilled in the art in the art do according to the present invention changes, and the change known of those skilled in that art, all should still belong to the scope that the present invention is contained.
Claims (6)
1. a controllable type optical path changer, is characterized in that, comprises the first photonic crystal and the second photonic crystal be made up of magneto-optic memory technique; Between the first described photonic crystal and the second photonic crystal, be provided with the three-photon crystal that non-magneto-optic memory technique is made; Described three-photon crystal and the first photonic crystal, the second photonic crystal form respectively one-way waveguide; In described three-photon crystal, be also provided with the magnetic switch of being made by magneto-optic memory technique; Described optical path changer also comprises magnetic field generator, and described magnetic field generator provides D.C. magnetic field to the first photonic crystal, the second photonic crystal and magnetic switch.
2. controllable type optical path changer according to claim 1, it is characterized in that, described the first photonic crystal and the second photonic crystal are square lattice lattice structure, and described three-photon crystal is and the square lattice lattice structure of the square lattice dot matrix angle at 45 ° of the first photonic crystal, the second photonic crystal.
3. controllable type optical path changer according to claim 1 and 2, is characterized in that, the material that described the first photonic crystal, the second photonic crystal and magnetic switch use is yttrium iron garnet; The material of described three-photon crystal is aluminium.
4. controllable type optical path changer according to claim 1, is characterized in that, the waveguide that described three-photon crystal and the first photonic crystal, the second photonic crystal form is respectively linear pattern waveguide.
5. controllable type optical path changer according to claim 1, is characterized in that, the waveguide that described three-photon crystal and the first photonic crystal, the second photonic crystal form is respectively broken line type waveguide.
6. controllable type optical path changer according to claim 1, is characterized in that, by the multichannel controllable type optical path changer that is combined into of multiple the first described photonic crystals and the second photonic crystal.
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| CN201210571939.4A CN103901695B (en) | 2012-12-25 | 2012-12-25 | Controllable type optical path changer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572921A (en) * | 2016-02-15 | 2016-05-11 | 欧阳征标 | Magnetic control alternative right-angled output optical path switch based on photonic crystal T-type waveguide |
| CN105572918A (en) * | 2016-02-15 | 2016-05-11 | 欧阳征标 | Magnetic control alternative optical path switch based on photonic crystal cross waveguide |
| CN105607304A (en) * | 2016-02-15 | 2016-05-25 | 欧阳征标 | Photonic crystal T-shaped waveguide-based horizontal output magnetic control alternative light path switch |
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| CN101414029A (en) * | 2007-11-14 | 2009-04-22 | 集美大学 | Two-dimensional hetero-junction photon crystal tunable filter |
| CN101614844A (en) * | 2009-06-09 | 2009-12-30 | 福建师范大学 | Optical add/drop filter based on 2 D photon crystal band gap and auto-collimation effect |
| CN101726873A (en) * | 2009-12-14 | 2010-06-09 | 深圳大学 | Photonic crystal three-port circulator |
-
2012
- 2012-12-25 CN CN201210571939.4A patent/CN103901695B/en not_active Expired - Fee Related
Patent Citations (3)
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| CN101414029A (en) * | 2007-11-14 | 2009-04-22 | 集美大学 | Two-dimensional hetero-junction photon crystal tunable filter |
| CN101614844A (en) * | 2009-06-09 | 2009-12-30 | 福建师范大学 | Optical add/drop filter based on 2 D photon crystal band gap and auto-collimation effect |
| CN101726873A (en) * | 2009-12-14 | 2010-06-09 | 深圳大学 | Photonic crystal three-port circulator |
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| QIONG WANG,ZHENGBIAO OUYANG,AND QIANG LIU: "Multiport photonic crystal circulators created by cascading magneto-optical cavities", 《JOURNAL OF OPTICAL SOCIETY OF AMERICA》 * |
| QIONG WANG,ZHENGBIAO OUYANG,KEYU TAO,ET.AL.: "T-shaped optical circulator based on coupled magneto-optical rods and a side-coupled cavity in a square-lattice photonic crystal", 《PHYSICS LETTERS A》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572921A (en) * | 2016-02-15 | 2016-05-11 | 欧阳征标 | Magnetic control alternative right-angled output optical path switch based on photonic crystal T-type waveguide |
| CN105572918A (en) * | 2016-02-15 | 2016-05-11 | 欧阳征标 | Magnetic control alternative optical path switch based on photonic crystal cross waveguide |
| CN105607304A (en) * | 2016-02-15 | 2016-05-25 | 欧阳征标 | Photonic crystal T-shaped waveguide-based horizontal output magnetic control alternative light path switch |
| CN105607304B (en) * | 2016-02-15 | 2021-02-19 | 欧阳征标 | Transverse output magnetic control alternative optical path switch based on photonic crystal T-shaped waveguide |
| CN105572918B (en) * | 2016-02-15 | 2021-02-19 | 深圳大学 | Magnetic control alternative optical path switch based on photonic crystal cross waveguide |
| CN105572921B (en) * | 2016-02-15 | 2021-02-19 | 深圳大学 | Magnetic control alternative right-angle output light path switch based on photonic crystal T-shaped waveguide |
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