CN106405729B - The low fast mould random angle of damage type magneto-optic thin film magnetic surface of No leakage unidirectionally turns round waveguide - Google Patents
The low fast mould random angle of damage type magneto-optic thin film magnetic surface of No leakage unidirectionally turns round waveguide Download PDFInfo
- Publication number
- CN106405729B CN106405729B CN201610795826.0A CN201610795826A CN106405729B CN 106405729 B CN106405729 B CN 106405729B CN 201610795826 A CN201610795826 A CN 201610795826A CN 106405729 B CN106405729 B CN 106405729B
- Authority
- CN
- China
- Prior art keywords
- magneto
- waveguide
- optical film
- optical
- magnetic surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000010409 thin film Substances 0.000 title abstract description 14
- 230000003287 optical effect Effects 0.000 claims abstract description 36
- 238000005452 bending Methods 0.000 claims abstract description 18
- 239000012788 optical film Substances 0.000 claims description 56
- 239000000463 material Substances 0.000 claims description 52
- 239000010408 film Substances 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- 239000003822 epoxy resin Substances 0.000 claims description 9
- 229910002804 graphite Inorganic materials 0.000 claims description 9
- 239000010439 graphite Substances 0.000 claims description 9
- 229920000647 polyepoxide Polymers 0.000 claims description 9
- 239000011358 absorbing material Substances 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 6
- 239000002223 garnet Substances 0.000 claims description 5
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000004593 Epoxy Substances 0.000 claims description 3
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 3
- 239000004695 Polyether sulfone Substances 0.000 claims description 3
- 229920002873 Polyethylenimine Polymers 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910052796 boron Inorganic materials 0.000 claims description 3
- 239000006229 carbon black Substances 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 239000003989 dielectric material Substances 0.000 claims description 3
- 229920001973 fluoroelastomer Polymers 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 239000005304 optical glass Substances 0.000 claims description 3
- 229920006393 polyether sulfone Polymers 0.000 claims description 3
- 229920002530 polyetherether ketone Polymers 0.000 claims description 3
- 229920001021 polysulfide Polymers 0.000 claims description 3
- 239000005077 polysulfide Substances 0.000 claims description 3
- 150000008117 polysulfides Polymers 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 3
- 229920002379 silicone rubber Polymers 0.000 claims description 3
- 239000004945 silicone rubber Substances 0.000 claims description 3
- 239000012815 thermoplastic material Substances 0.000 claims description 3
- 229910052723 transition metal Inorganic materials 0.000 claims description 3
- 150000002910 rare earth metals Chemical class 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 21
- 230000035699 permeability Effects 0.000 description 7
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- MTRJKZUDDJZTLA-UHFFFAOYSA-N iron yttrium Chemical compound [Fe].[Y] MTRJKZUDDJZTLA-UHFFFAOYSA-N 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000003707 silyl modified polymer Substances 0.000 description 2
- 230000007847 structural defect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/09—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect
- G02F1/095—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect in an optical waveguide structure
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Optical Integrated Circuits (AREA)
Abstract
It unidirectionally turns round waveguide the invention discloses a kind of low fast mould random angle of damage type magneto-optic thin film magnetic surface of No leakage, it includes a light input end (1), a light output end (2), a magneto-optic thin film (3), background media (4), two suction wave layers (5,6) and a bias magnetic field；The left end of the unidirectional turn waveguide is light input end (1), its right end is light output end (2)；The magneto-optic thin film (3) is set in background media (4)；The magneto-optic thin film (3) uses magneto-optic memory technique；The magneto-optic thin film (3) and background media (4) are any angle Curved；Bias magnetic field is provided at the magneto-optic thin film (3)；Magneto-optic thin film (3) bending part is annulus shape；It is magnetic surface fast wave at the surface of the magneto-optic memory technique and the background media (4).The present invention is simple, small in size with structure, it is integrated to be convenient for, and low-loss, high-transmission are high-efficient, is suitable for extensive optical path and integrates, is widely applied in the design of various optical waveguides.
Description
Technical Field
The invention relates to a magneto-optical material, a surface wave and a photodiode, in particular to a leakage-free low-loss magneto-optical film magnetic surface fast mode arbitrary angle unidirectional turning waveguide.
Background
A corner waveguide is an optical device for use as a conversion optical path, and plays an important role in an optical waveguide device. Bends in the optical waveguide are necessary due to the need for changes in the direction of propagation of the light beam in the optical waveguide, displacement of the transmission axis of the light beam, and reduction in the volume of the device. The waveguide bending causes the distribution of optical characteristics of the waveguide material in the light transmission direction to change, so that the corner waveguide has high loss. There has been extensive research in the field of curve waveguides, of which arc turn type curve waveguides are the main subject of current research in this regard. Even with this type of waveguide, the bending and transition losses present still severely limit the transmission efficiency. In addition, structural defects and the like can also cause other losses to the waveguide.
A photodiode and an isolator are optical devices that allow light to travel in only one direction, and are used to prevent unwanted optical feedback. The main element of conventional photodiodes and isolators is a faraday rotator, which employs the faraday effect (magneto-optical effect) as its operating principle. The conventional faraday isolator is composed of a polarizer, a faraday rotator and an analyzer, and the device has a complex structure and is generally applied to a free-space optical system. For integrated optical circuits, integrated optical devices such as optical fibers or waveguides are non-polarization maintaining systems, which cause loss of polarization angle, and thus are not suitable for faraday isolators.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides the leakage-free low-loss unidirectional turning waveguide with the magnetic surface of the magneto-optical film, which has the advantages of simple and effective structure, low loss, high optical transmission efficiency, small volume and convenience for integration, and is suitable for any angle of the fast mode.
The purpose of the invention is realized by the following technical scheme.
The invention relates to a non-leakage low-loss magneto-optical film magnetic surface fast mode arbitrary angle one-way turning waveguide, which comprises a light input end 1, a light output end 2, a magneto-optical film 3, a background medium 4, two wave absorbing layers 5 and 6 and a bias magnetic field; the left end of the one-way turning waveguide is a light input end 1, and the right end of the one-way turning waveguide is a light output end 2; the magneto-optical film 3 is arranged in a background medium 4; the magneto-optical film 3 is made of magneto-optical materials; the magneto-optical film 3 and the background medium 4 are in a bent shape with any angle; a bias magnetic field is arranged at the magneto-optical film 3; the bending part of the magneto-optical film 3 is in a ring shape; the surface of the magneto-optical material and the background medium 4 is a magnetic surface fast wave.
The interface of the magneto-optical material with the background medium 4 constitutes an optical waveguide.
The magneto-optical film 3 and the background medium 4 are connected with the optical input port 1 and the optical output port 2 through any angle bending.
The magneto-optical material film and the background medium 4 structure are flat waveguide structures.
The magneto-optical material is magneto-optical glass or various rare earth element doped garnet, rare earth-transition metal alloy film and other materials.
The background medium 4 is a common medium material or air.
The arbitrary angle bending shape is a 30-degree bending shape, a 45-degree bending shape, a 60-degree bending shape, a 90-degree bending shape, a 120-degree bending shape, a 135-degree bending shape, a 150-degree bending shape or a 180-degree bending shape.
The wave-absorbing layers 5 and 6 are made of the same or different wave-absorbing materials; the wave-absorbing material is polyurethane, graphite, graphene, carbon black, a carbon fiber epoxy resin mixture, a graphite thermoplastic material mixture, a boron fiber epoxy resin mixture, a graphite fiber epoxy resin mixture, epoxy polysulfide, silicone rubber, urethane, a fluoroelastomer, polyether ether ketone, polyether sulfone, polyarylsulfone or polyethyleneimine.
The distance between the wave absorbing layers 5 and 6 and the surface of the flat waveguide is 1/4-1/2 wavelength; the thicknesses of the wave absorbing layers 5 and 6 are not less than 1/4 wavelengths respectively.
The bias magnetic field is generated by an electromagnet or a permanent magnet; the unidirectional turning waveguide is formed by a magneto-optical material film waveguide; the working mode of the one-way turning waveguide is a TE mode.
The invention is suitable for large-scale optical path integration and has wide application prospect. Compared with the prior art, the method has the following positive effects.
1. Simple structure and convenient realization.
2. Small volume and convenient integration.
3. The magnetic surface wave has the immune characteristic to structural defects, has ultra-low loss and ultra-high transmission efficiency, and is widely applied to the design of various optical waveguides.
Drawings
Fig. 1 is a structural diagram of a non-leakage low-loss type magneto-optical film magnetic surface fast mode arbitrary angle one-way bend waveguide.
In the figure, a light input end 1, a light output end 2, a magneto-optical film 3 (magneto-optical material film), a background medium 4, a first wave-absorbing layer 5, a second wave-absorbing layer 6, a bias magnetic field ⊙ H0Thickness w of (external) magneto-optical film and distance w between wave-absorbing layer and waveguide1The radius of the inner arc of the ring is r + w
FIG. 2 is a schematic diagram of the fast mode one-way turn waveguide on the magnetic surface of the magneto-optical film.
FIG. 3 is a graph of forward and reverse transmission efficiency of a magneto-optical thin film one-way bend waveguide as a function of frequency of light waves.
FIG. 4 is a graph of forward and reverse transmission efficiency of a magneto-optical thin film one-way bend waveguide as a function of frequency of light waves.
FIG. 5 is a graph of forward and reverse transmission efficiency of a magneto-optical film one-way bend waveguide as a function of frequency of light waves.
FIG. 6 is a graph of forward and reverse transmission efficiency of a magneto-optical film one-way bend waveguide as a function of frequency of light waves.
Detailed Description
As shown in figure 1, the leakage-free ultralow-loss magneto-optical film magnetic surface fast mode arbitrary angle one-way turning waveguide comprises an optical input end 1, an optical output end 2, a magneto-optical film 3, a background medium 4, a first wave absorbing layer 5, a second wave absorbing layer 6 and a bias magnetic field H0The working mode of the one-way bend waveguide is TE mode, the one-way bend waveguide is composed of magneto-optical material film waveguide, the interface of the magneto-optical film 3 and the background medium 4 is the area where the light energy is mainly concentrated, the magneto-optical film 3 is arranged in the background medium 4, and the magneto-optical film 3 is made of magneto-optical material, namely magneto-optical material film; the magneto-optical material is magneto-optical glass or various rare earth element doped garnet, rare earth-transition metal alloy film and other materials;the curved portion of the magneto-optical film 3 is in the shape of a circular ring, the radius of the inner circular arc of the circular ring is r, and the radius of the outer circular arc of the circular ring is r + w. The bend angle may be between 0 degrees and 180 degrees, and the bend angle of the one-way bend waveguide may also be: an angle between 0 degrees and 180 degrees; for example: 30 degrees, 45 degrees, 60 degrees, 90 degrees, 120 degrees, 135 degrees, 150 degrees, and 180 degrees. Wherein the one-way turning angle of fig. 1(a) is 30 degrees, the one-way turning angle of fig. 1(b) is 45 degrees, the one-way turning angle of fig. 1(c) is 60 degrees, the one-way turning angle of fig. 1(d), (i) is 90 degrees, the one-way turning angle of fig. 1(e) is 120 degrees, the one-way turning angle of fig. 1(f) is 135 degrees, the one-way turning angle of fig. 1(g) is 150 degrees, and the one-way turning angle of fig. 1(h) is 180 degrees. The length of the curved portion depends on the turning angle. The magneto-optical material film 3 and the background medium 4 are of any-angle bending shape, and the shape of any-angle bending is a circular arc (arc-shaped turning type turning waveguide), for example, when the turning angle is 45 degrees, the shape is one eighth of a circular ring; when the turning angle is 90 degrees, the turning angle is a quarter of a circular ring; when the turning angle is 180 degrees, the turning angle is a half circle ring, and the like. Since the device structure of the invention satisfies the symmetric conservation, that is, the corresponding mirror image structure can also work effectively, the two structures shown in fig. 1(d) and (i) have mirror images and have the same working characteristics. The surfaces of the magneto-optical material and the background medium 4 are magnetic surface fast waves, and the structures of the magneto-optical material film 3 and the background medium 4 are flat waveguide structures; the interface of the magneto-optical material and the background medium 4 forms an optical waveguide which unidirectionally transmits optical signals and is used as a photodiode or an isolator; the magneto-optical material film 3 and the background medium 4 are connected with the optical input port 1 and the optical output port 2 in a bent shape at any angle; the background medium 4 is made of common medium material or air; the first wave absorbing layer 5 and the second wave absorbing layer 6 are made of the same or different wave absorbing materials, and the wave absorbing materials are polyurethane, graphite, graphene, carbon black, a carbon fiber epoxy resin mixture, a graphite thermoplastic material mixture, a boron fiber epoxy resin mixture, a graphite fiber epoxy resin mixture, epoxy polysulfide, silicone rubber, urethane, a fluoroelastomer, polyether ether ketone, polyether sulfone, polyarylsulfone or polyethyleneimine; the distances between the first wave absorbing layer 5 and the second wave absorbing layer 6 and the surface of the flat waveguide are 1/4-12 wavelength, the thicknesses of the first wave absorbing layer 5 and the second wave absorbing layer 6 are not less than 1/4 wavelength respectively, and a bias magnetic field ⊙ H is arranged at the magneto-optical material film 30(external), the bias magnetic field is generated by an electromagnet or a permanent magnet. When the bias magnetic field direction is perpendicular to the paper surface and faces outwards or inwards, the port 1 of the one-way turning waveguide is an optical input end, and the port 2 of the one-way turning waveguide is an optical output end.
The surface magnetic wave generated at the magneto-optical material-medium interface is a phenomenon similar to metal Surface Plasmon Polariton (SPP). Under the action of bias static magnetic field, the magnetic conductivity of the magneto-optical material is in tensor form, and meanwhile, the effective refractive index of the magneto-optical material is a negative value within a certain optical band range. Thus, the surface of the magneto-optical material can generate a guided wave and has the property of propagating in one direction, called a magnetic surface wave (surface magnetically polarized wavelet, SMP).
The invention relates to a non-leakage low-loss type magneto-optical film magnetic surface fast mode arbitrary angle one-way turning waveguide. The device is a one-way turning waveguide with excellent performance which is researched based on the non-reciprocity of a magneto-optical material and combined with the characteristic that a magneto-optical material-medium interface can generate surface waves. The magneto-optical material film is placed in a medium (air) background and combined with two wave absorbing layers, unidirectional bending transmission of light is carried out by utilizing a magnetic surface fast wave generated by a magneto-optical material-medium interface, and the wave absorbing layers absorb useless waves and eliminate light path interference.
The technical scheme of the invention is based on the optical nonreciprocal property of the magneto-optical material and the unique property of the surface wave capable of being conducted of the magneto-optical material-medium interface, and realizes the design of the one-way turning waveguide. The basic principle of the technical scheme is as follows:
the magneto-optical material is a material with magnetic anisotropy, and magnetic dipoles in the magneto-optical material are arranged in the same direction due to an external static magnetic field, so that a magnetic dipole moment is generated. The magnetic dipole moment will interact strongly with the optical signal, resulting in a non-reciprocal transmission of light. A bias magnetic field H in a direction perpendicular to the paper surface0The permeability tensor of the magneto-optical material is:
the elements of the permeability tensor are given by the following system of equations:
wherein, mu0Is magnetic permeability in vacuum, gamma is gyromagnetic ratio, H0For application of a magnetic field, MsTo saturation magnetization, ω is the operating frequency and α is the loss factor, H if the direction of the bias field is changed to be perpendicular to the paper, then H0And MsThe sign will change.
The surface magnetic wave generated at the magneto-optical material-medium interface can be solved according to the permeability tensor of the magneto-optical material and the Maxwell equation set. The electric field and the magnetic field existing at the interface of the surface wave (TE wave) should have the following forms:
where i-1 represents the region of magneto-optical material and i-2 represents the region of the medium. Substituting maxwell's equations:
then, based on the constitutive relation and the boundary condition, the wave vector k of the magnetic surface wave can be obtainedzTranscendental equation of (a):
wherein,is the effective permeability of the magneto-optical material. The transcendental equation can be solved by numerical solution to finally obtain kzThe value of (c). It can also be seen from the equation that since the equation contains μκkzTherefore, the magnetic surface wave has nonreciprocity (unidirectional propagation).
It can be seen that by applying a biased static magnetic field to the magneto-optical material film 3 and using a common dielectric material or air as the background material, an effective unidirectional waveguide will be formed. And the loss of the corner waveguide theoretically generated by the curved structure is very low due to the characteristics of the magnetic surface wave (SMP). As shown in FIG. 2, Yttrium Iron Garnet (YIG) was used as the magnetic anisotropic material, and the background medium 4 was air (n)01), the bias magnetic field is 900Oe, the thickness w of the magneto-optical film is 5mm, and the distances between the first wave absorbing layer 5 and the second wave absorbing layer 6 and the waveguide are w15mm, the radius r of the inner arc of the ring 30mm, the operating frequency f of the device being determined by the dielectric constant epsilon of the magneto-optical material and the medium1，ε2And magnetic permeability [ mu ]1]，μ2The determined operating frequency is 6GHz, and the YIG material loss coefficient α is 3 × 10-4And the turning angle is 90 degrees. The direction of the bias magnetic field is vertical to the paper surface and outward, when light is input from the port 1, a magnetic surface wave with unidirectional forward transmission is generated on a magneto-optical material-medium interface, and finally the light is output from the port 2; when light is input from the port 2, the optical wave cannot be transmitted backward in the device due to the non-reciprocity of the magnetic surface wave, and thus cannot be output from the port 1. The light energy has been totally blocked at port 2. Meanwhile, the optical wave can be well limited in the turning waveguide of the magneto-optical film, and the loss value is very low.
The non-leakage low-loss magneto-optical film magnetic surface fast-mode arbitrary-angle one-way turning waveguide of the device is arranged in a common dielectric material by adopting a magneto-optical material, and the structural size and parameters of the waveguide, such as the inner arc radius r of a circular ring and the thickness of a dielectric layerw can be flexibly selected according to the working wavelength and the actual requirement. Changing the dimensions does not have a large impact on device performance. Four embodiments are given below with reference to the drawings, in which Yttrium Iron Garnet (YIG) is used as the magnetic anisotropic material, the bias magnetic field is 900Oe, the bias magnetic field is perpendicular to the paper surface and faces outwards, and the background medium 4 is air (n)01), the thickness w of the magneto-optical film is 5mm, and the distances between the first wave absorbing layer 5 and the second wave absorbing layer 6 and the waveguide are w15mm, 60mm radius of inner arc of circular ring, 3X 10 loss coefficient of YIG material α-4The operating frequency f of the device being determined by the dielectric constants epsilon of the magneto-optical material and the medium1，ε2And magnetic permeability [ mu ]1]，μ2And (4) determining.
Example 1
Referring to fig. 1(b), the one-way bend waveguide is formed of a magneto-optical thin film waveguide, and the bend angle is 45 °. In the working frequency band, the light wave input from the port 1 generates a magnetic surface wave in the device, and then is output from the port 2 through the device; the light wave input from port 2 will be blocked by the device and will not be output from port 1. Referring to FIG. 3, the operating frequency range of the one-way bend waveguide is 5.11 GHz-7.38 GHz. In the working frequency range, the material loss is considered, the highest forward and reverse transmission isolation of the one-way turning waveguide is 28.446dB, and the forward transmission insertion loss is 0.0664 dB.
Example 2
Referring to fig. 1(d) and (i), the one-way bend waveguide is formed of a magneto-optical thin film waveguide, and the bend angle is 90 °. In the working frequency band, the light wave input from the port 1 generates a magnetic surface wave in the device, and then is output from the port 2 through the device; the light wave input from port 2 will be blocked by the device and will not be output from port 1. Referring to fig. 4, the operating frequency range of the one-way bend waveguide is 5.00 GHz-7.40 GHz. In the working frequency range, the material loss is considered, the highest forward and reverse transmission isolation of the one-way turning waveguide is 31.993dB, and the forward transmission insertion loss is 0.0163 dB.
Example 3
Referring to fig. 1(f), the one-way bend waveguide is formed of a magneto-optical thin film waveguide, and the bend angle is 135 °. In the working frequency band, the light wave input from the port 1 generates a magnetic surface wave in the device, and then is output from the port 2 through the device; the light wave input from port 2 will be blocked by the device and will not be output from port 1. Referring to fig. 5, the operating frequency range of the one-way bend waveguide is 5.06 GHz-7.40 GHz. In the working frequency range, the material loss is considered, the highest forward and reverse transmission isolation of the one-way turning waveguide is 27.4473dB, and the forward transmission insertion loss is 0.0490 dB.
Example 4
Referring to fig. 1(h), the one-way bend waveguide is formed of a magneto-optical thin film waveguide, and the bend angle is 180 °. In the working frequency band, the light wave input from the port 1 generates a magnetic surface wave in the device, and then is output from the port 2 through the device; the light wave input from port 2 will be blocked by the device and will not be output from port 1. Referring to FIG. 6, the operating frequency range of the one-way bend waveguide is 5.00 GHz-7.39 GHz. In the working frequency range, the highest forward and reverse transmission isolation of the one-way turning waveguide is 35.753dB and the forward transmission insertion loss is 0.0383dB by considering material loss.
The optical frequency range of the fast mode of the magnetic surface transmitted by the magneto-optical film turn waveguide, that is, the working frequency range of the one-way turn waveguide, can be obtained from the transmission efficiency curve diagrams of the fast mode one-way turn waveguide of the magneto-optical film magnetic surface at different turn angles in fig. 3, 4, 5 and 6. The result shows that the low-loss magneto-optical film magnetic surface fast mode arbitrary angle one-way bend waveguide can work effectively.
The invention described above is subject to modifications both in the specific embodiments and in the field of application and should not be understood as being limited thereto.
Claims (14)
1. A non-leakage low-loss magneto-optical film magnetic surface fast mode arbitrary angle one-way turning waveguide is characterized by comprising a light input end (1), a light output end (2), a magneto-optical film (3), two layers of background media (4), two wave absorbing layers (5 and 6) and a bias magnetic field; the left end of the one-way turning waveguide is a light input end (1), and the right end of the one-way turning waveguide is a light output end (2); a bias magnetic field is arranged at the magneto-optical film (3); the magneto-optical film (3) is arranged in the interface of the background medium (4), and the magneto-optical film (3) is made of magneto-optical materials; the interface of the magneto-optical film (3) and the background medium (4) generates a magnetic surface fast wave; the magneto-optical film (3) and the background medium (4) are bent at any angle; the bending part of the magneto-optical film (3) is in a ring shape.
2. The non-leakage low-loss magneto-optical film magnetic surface fast mode arbitrary angle unidirectional turn waveguide according to claim 1, characterized in that the interface of the magneto-optical film (3) and the background medium (4) constitutes an optical waveguide.
3. The non-leakage low-loss magneto-optical film magnetic surface fast mode arbitrary angle unidirectional bend waveguide according to claim 1, wherein the magneto-optical film (3) and the background medium (4) are connected with the optical input end (1) and the optical output end (2) by an arbitrary angle bend.
4. The non-leakage low-loss magneto-optical film magnetic surface fast-mode arbitrary angle unidirectional bend waveguide of claim 1, wherein the magneto-optical film (3) and the background medium (4) structure are straight waveguide structures.
5. The non-leakage low-loss magneto-optical film magnetic surface fast mode arbitrary angle unidirectional bend waveguide of claim 1, wherein the magneto-optical material is magneto-optical glass, rare earth doped garnet, or rare earth-transition metal alloy film material.
6. The non-leakage low-loss magneto-optical film magnetic surface fast-mode arbitrary angle unidirectional turn waveguide according to claim 1, wherein the background medium (4) is a common dielectric material or air.
7. The non-leakage low loss magneto-optical film magnetic surface fast mode arbitrary angle unidirectional turn waveguide of claim 1, wherein the arbitrary angle turn shape is a 30 degree turn shape, a 45 degree turn shape, a 60 degree turn shape, a 90 degree turn shape, a 120 degree turn shape, a 135 degree turn shape, a 150 degree turn shape, or a 180 degree turn shape.
8. The non-leakage low-loss magneto-optical film magnetic surface fast-mode arbitrary angle unidirectional turn waveguide of claim 1, wherein: the wave-absorbing layers are made of the same or different wave-absorbing materials.
9. The non-leakage low-loss magneto-optical film magnetic surface fast-mode arbitrary angle unidirectional turn waveguide of claim 1, wherein: the wave-absorbing material is polyurethane, graphite, graphene, carbon black, a carbon fiber epoxy resin mixture, a graphite thermoplastic material mixture, a boron fiber epoxy resin mixture, a graphite fiber epoxy resin mixture, epoxy polysulfide, silicone rubber, urethane, a fluoroelastomer, polyether ether ketone, polyether sulfone, polyarylsulfone or polyethyleneimine.
10. The non-leakage low-loss magneto-optical film magnetic surface fast-mode arbitrary angle unidirectional turn waveguide of claim 1, wherein: the distance between the two wave absorbing layers (5 and 6) and the waveguide is 1/4-1/2 wavelength.
11. The non-leakage low-loss magneto-optical film magnetic surface fast-mode arbitrary angle unidirectional turn waveguide of claim 1, wherein: the thicknesses of the two wave absorbing layers (5 and 6) are respectively not less than 1/4 wavelengths.
12. The non-leakage low-loss magneto-optical film magnetic surface fast-mode arbitrary angle unidirectional turn waveguide of claim 1, wherein: the bias magnetic field is generated by an electromagnet or a permanent magnet.
13. The non-leakage low-loss magneto-optical film magnetic surface fast-mode arbitrary angle unidirectional turn waveguide of claim 1, wherein: the one-way bend waveguide is composed of a magneto-optical film waveguide.
14. The non-leakage low-loss magneto-optical film magnetic surface fast-mode arbitrary angle unidirectional turn waveguide of claim 1, wherein: the working mode of the one-way turning waveguide is a TE mode.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610795826.0A CN106405729B (en) | 2016-08-31 | 2016-08-31 | The low fast mould random angle of damage type magneto-optic thin film magnetic surface of No leakage unidirectionally turns round waveguide |
| PCT/CN2017/099812 WO2018041175A1 (en) | 2016-08-31 | 2017-08-31 | Magnetic surface fast-mode arbitrary-angle unidirectional bent waveguide with leakless low-loss magneto-optical thin film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610795826.0A CN106405729B (en) | 2016-08-31 | 2016-08-31 | The low fast mould random angle of damage type magneto-optic thin film magnetic surface of No leakage unidirectionally turns round waveguide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106405729A CN106405729A (en) | 2017-02-15 |
| CN106405729B true CN106405729B (en) | 2019-04-23 |
Family
ID=58001653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610795826.0A Expired - Fee Related CN106405729B (en) | 2016-08-31 | 2016-08-31 | The low fast mould random angle of damage type magneto-optic thin film magnetic surface of No leakage unidirectionally turns round waveguide |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106405729B (en) |
| WO (1) | WO2018041175A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405729B (en) * | 2016-08-31 | 2019-04-23 | 欧阳征标 | The low fast mould random angle of damage type magneto-optic thin film magnetic surface of No leakage unidirectionally turns round waveguide |
| CN106291812B (en) * | 2016-08-31 | 2019-04-30 | 欧阳征标 | The low fast mould any direction of damage magneto-optic thin film magnetic surface controllably unidirectionally turns round waveguide |
| CN106154416B (en) * | 2016-08-31 | 2021-02-19 | 深圳大学 | Controllable one-way arbitrary turning waveguide of no-leakage low-loss magneto-optical film magnetic surface fast mode |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996007945A1 (en) * | 1994-09-09 | 1996-03-14 | Deacon Research | Controllable beam director using poled structure |
| EP1102285A3 (en) * | 1999-10-27 | 2006-03-22 | Minebea Co., Ltd. | Magneto-optical member |
| CN203012182U (en) * | 2012-12-25 | 2013-06-19 | 深圳大学 | Signal add-drop multiplexing module and signal add-drop multiplexer |
| CN103901541A (en) * | 2012-12-25 | 2014-07-02 | 深圳大学 | Signal add-drop multiplexing module and signal add-drop multiplexer |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2003303601A1 (en) * | 2003-01-02 | 2004-07-29 | Massachusetts Institute Of Technology | Magnetically active semiconductor waveguides for optoelectronic integration |
| WO2009081487A1 (en) * | 2007-12-25 | 2009-07-02 | Shibaura Institute Of Technology | Optical nonreciprocal device and method for manufacturing optical nonreciprocal device |
| CN101672987B (en) * | 2008-09-12 | 2013-01-02 | 华为技术有限公司 | Optical isolator, optical add/drop multiplexer and optical combiner |
| CN106249445A (en) * | 2016-08-31 | 2016-12-21 | 欧阳征标 | The low damage type magneto-optic thin film magnetic surface unidirectional waveguide of turning round of fast mould random angle |
| CN106405729B (en) * | 2016-08-31 | 2019-04-23 | 欧阳征标 | The low fast mould random angle of damage type magneto-optic thin film magnetic surface of No leakage unidirectionally turns round waveguide |
| CN106154416B (en) * | 2016-08-31 | 2021-02-19 | 深圳大学 | Controllable one-way arbitrary turning waveguide of no-leakage low-loss magneto-optical film magnetic surface fast mode |
-
2016
- 2016-08-31 CN CN201610795826.0A patent/CN106405729B/en not_active Expired - Fee Related
-
2017
- 2017-08-31 WO PCT/CN2017/099812 patent/WO2018041175A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996007945A1 (en) * | 1994-09-09 | 1996-03-14 | Deacon Research | Controllable beam director using poled structure |
| EP1102285A3 (en) * | 1999-10-27 | 2006-03-22 | Minebea Co., Ltd. | Magneto-optical member |
| CN203012182U (en) * | 2012-12-25 | 2013-06-19 | 深圳大学 | Signal add-drop multiplexing module and signal add-drop multiplexer |
| CN103901541A (en) * | 2012-12-25 | 2014-07-02 | 深圳大学 | Signal add-drop multiplexing module and signal add-drop multiplexer |
Non-Patent Citations (3)
| Title |
|---|
| 基于磁光材料的非互易器件的研究与设计;倪福超;《中国优秀硕士学位论文全文数据库信息科技辑》;20140915;全文 |
| 新型磁光器件的基础研究;金亿昌;《中国优秀硕士学位论文全文数据库信息科技辑》;20140615;全文 |
| 非互易光波导的若干基础问题研究;陈瑞宜;《中国博士学位论文全文数据库信息科技辑》;20140615;全文 |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018041175A1 (en) | 2018-03-08 |
| CN106405729A (en) | 2017-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Shintaku | Integrated optical isolator based on efficient nonreciprocal radiation mode conversion | |
| CN106249445A (en) | The low damage type magneto-optic thin film magnetic surface unidirectional waveguide of turning round of fast mould random angle | |
| CN106291811B (en) | The fast mould random angle of the low damage type magneto-optic gap magnetic surface of No leakage unidirectionally turns round waveguide | |
| WO2018041173A1 (en) | Leakage-free, low-loss waveguide having fast mode at magnetic surface of magneto-optical thin film thereof and being unidirectionally flexible to any angle | |
| CN106405729B (en) | The low fast mould random angle of damage type magneto-optic thin film magnetic surface of No leakage unidirectionally turns round waveguide | |
| CN106291812B (en) | The low fast mould any direction of damage magneto-optic thin film magnetic surface controllably unidirectionally turns round waveguide | |
| CN110058431A (en) | The super surface magneto-optic Ke Er polarization converter of Terahertz | |
| WO2018041178A1 (en) | Magnetic surface fast-mode arbitrary-direction controllable unidirectional bend waveguide with low-loss magneto-optic gap | |
| WO2018041179A1 (en) | Magnetic surface fast wave photodiode having gap waveguide of leakless magneto-optical material | |
| CN106405885A (en) | Leak-free magneto-optic thin film magnetic surface fast wave direction-controllable photodiode | |
| WO2018041184A1 (en) | Magnetic surface fast wave photodiode with leakless magneto-optical thin film | |
| CN106200026B (en) | Leakage-free low-loss magneto-optical gap magnetic surface fast mode controllable one-way arbitrary turning waveguide | |
| CN106249352B (en) | The low damage type magneto-optic gap fast mould random angle of magnetic surface unidirectionally turns round waveguide | |
| WO2018041180A1 (en) | Magnetic surface fast wave direction-controllable photodiode with leakless magneto-optical material gap waveguide | |
| WO2018041182A1 (en) | Magnetic surface fast wave photodiode with magneto-optic material gap waveguide | |
| WO2018041176A1 (en) | Magnetic surface fast wave direction-controllable photodiode with magneto-optic material gap waveguide | |
| Shirato et al. | High isolation in silicon waveguide optical isolator employing nonreciprocal phase shift | |
| CN106249443A (en) | Magneto-optic thin film magnetic surface Fast-wave direction controllable light diode | |
| WO2018041174A1 (en) | Magnetic surface fast wave photodiode with magneto-optical thin film | |
| CN210428000U (en) | A multi-channel signal selector based on magneto-optical medium and PT symmetrical structure | |
| Jiang et al. | A compact low-loss one-way transmission structure based on nonreciprocal coupling | |
| CN102544660A (en) | Method for controlling adjustable one-way waveguide based on anisotropic gyromagnetic medium | |
| Rao et al. | Design of One-way Structure for Spatial EM Wave Based on the Magnetic Surface Plasmon States | |
| CN219843149U (en) | Dual-polarized asymmetric transmission and wave-absorbing metamaterial structure | |
| Jiang et al. | A Low-Loss Broadband One-Way Transmission Structure Based on Nonreciprocal Coupling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190423 Termination date: 20210831 |