WO2018041189A1

WO2018041189A1 - Magnetic surface fast-mode arbitrary-angle unidirectional bend waveguide with leak-free low-loss type magneto-optic gap

Info

Publication number: WO2018041189A1
Application number: PCT/CN2017/099827
Authority: WO
Inventors: 欧阳征标; 郑耀贤
Original assignee: 深圳大学
Priority date: 2016-08-31
Filing date: 2017-08-31
Publication date: 2018-03-08
Also published as: CN106291811B; CN106291811A

Abstract

Disclosed is a magnetic surface fast-mode arbitrary-angle unidirectional bend waveguide with a leak-free low-loss type magneto-optic gap, comprising an optical input port (1), an optical output port (2), two magneto-optic material layers (3, 4), a dielectric layer (5), four wave absorption layers (6, 7, 8 and 9) and two bias magnetic fields in opposite directions. The magneto-optic material layers (3, 4) and the dielectric layer (5) are an optical waveguide with a three-layer structure, wherein the three-layer structure is bend-shaped at arbitrary angle, and the two bias magnetic fields in opposite directions are arranged on the magneto-optic material layers (3, 4). The dielectric layer (5) is in a gap between the magneto-optic material layers (3, 4). A bending part of the waveguide is of an annular shape at the dielectric layer (5). A magnetic surface fast wave is on a surface of the magnetic-optic material layers (3, 4) and the dielectric layer (5). The unidirectional bend waveguide has a simple structure, is convenient for integration, has low loss, has high transmission efficiency, and is applicable to large-scale optical path integration.

Description

Leak-free low-loss type magneto-optical gap magnetic surface fast mode arbitrary angle one-way curved waveguide

Technical field

The invention relates to a magneto-optical material, a surface wave and a photodiode, in particular to a non-leakage and low-loss type magneto-optical gap magnetic surface fast mode arbitrary angle one-way turning waveguide.

Background technique

A curved waveguide is an optical device used as a conversion optical path, which occupies an important position in an optical waveguide device. Bending in the optical waveguide is necessary due to the change in the direction of beam propagation in the optical waveguide, the displacement of the beam transmission axis, and the need to reduce the volume of the device. The bending of the waveguide causes a change in the optical characteristic distribution of the waveguide material in the direction of light transmission, so that the curved waveguide has a high loss. The field of turning waveguides has been extensively studied, and the curved turning type curved waveguide is the main content of this research. But even for this type of waveguide, the bending loss and transition loss that are present still severely restrict the transmission efficiency. In addition, structural defects and the like can also cause other losses to the waveguide.

Photodiodes and isolators are optics that only allow light to travel in one direction and are used to prevent unwanted light feedback. The main component of conventional photodiodes and isolators is the Faraday rotator, which applies the Faraday effect (magneto-optical effect) as its working principle. Conventional Faraday isolators consist of a polarizer, a Faraday rotator, and an analyzer. This device is complex in structure and is commonly used in free-space optical systems. For integrated optical paths, integrated optical devices such as fiber optics or waveguides are non-polarization-maintaining systems that cause loss of polarization angle and are therefore not suitable for use with pull-up isolators.

Summary of the invention

The object of the present invention is to overcome the deficiencies in the prior art and provide a non-leakage low loss type magneto-optical gap magnetic surface fast mode arbitrary angle with simple and effective structure, low loss, high light transmission efficiency, small volume and easy integration. One-way turning waveguide.

In order to achieve the above object, the present invention adopts the following design:

The leakage-free low-loss type magneto-optical gap magnetic surface fast mode arbitrary angle one-way turning waveguide of the invention comprises an optical input port 1, a light output port 2, two magneto-

optical material layers

3, 4, a dielectric layer 5, and four

Absorbing layers

6, 7, 8 and 9 and two opposite bias magnetic fields; said magneto-

optical material layers

3, 4 and dielectric layer 5 being a three-layer optical waveguide, said three-layer structure being bent at any angle Forming two bias magnetic fields in opposite directions at the magneto-

optical material layers

3, 4; the gap between the magneto-

optical material layers

3, 4 is a dielectric layer 5, and the port 1 of the unidirectional curved waveguide It is an optical input port, and its port 2 is a light output port; the dielectric layer 5 has a ring shape at a curved portion of the waveguide; and the surface of the magneto-

optical material layers

3, 4 and the dielectric layer 5 is a magnetic surface fast wave.

The photodiode and the isolator are composed of magneto-

optical material layers

3, 4 and a dielectric layer 5.

The magneto-optical material is magneto-optical glass or various rare earth element-doped garnets and rare earth-transition metal alloy films.

The layers of magneto-

optical material

3, 4 and dielectric layer 5 are connected to the optical input port and the optical output port by any angular bending.

The dielectric layer 5 is a vacuum, air, silicon dioxide or a working wave transparent plastic.

The three-layer structure is a flat structure.

The arbitrary angle curved 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.

The absorbing

layers

6, 7, 8, and 9 are the same or different absorbing materials; the absorbing materials are polyurethane, graphite, graphene, carbon black, carbon fiber epoxy resin mixture, graphite thermoplastic material mixture , boron fiber epoxy resin mixture, graphite fiber epoxy resin mixture, epoxy polysulfide, silicone rubber, urethane, fluoroelastomer, polyether ether ketone, polyether sulfone, polyaryl sulfone or polyethyleneimine.

The absorbing

layers

6, 7, 8, and 9 are each at a distance of 1/4 to 1/2 wavelength from the surface of the flat waveguide; the thicknesses of the absorbing

layers

6, 7, 8, and 9 are respectively not Less than 1/4 wavelength.

The bias magnetic field is generated by an electromagnet or a permanent magnet; the unidirectional turning waveguide is composed of a magneto-optical gap waveguide; and the unidirectional cornering waveguide operates in a TE mode.

The invention is suitable for large-scale optical path integration and has broad application prospects. Compared with the prior art, it has the following positive effects.

1. The structure is simple and easy to implement.

2. Small size for easy integration.

3. Magnetic surface waves have immune characteristics to structural defects, and have ultra-low loss and ultra-high transmission efficiency, and are widely used in the design of various optical waveguides.

DRAWINGS

1 is a structural diagram of a non-leakage low loss type magneto-optical gap magnetic surface fast mode arbitrary angle one-way turning waveguide.

In the figure: optical input port 1 optical output port 2 first magneto-optical material layer 3 second magneto-optical material layer 4 dielectric layer 5 first absorbing layer 6 second absorbing layer 7 third absorbing layer 8 fourth absorbing wave Layer 9 Biasing magnetic field ⊙H ₀ (outer) Biasing magnetic field ⊕H ₀ (in) Dielectric layer thickness w Distance between the absorbing layer and the waveguide w ₁ Inner arc radius of the ring r Outer arc radius of the ring r+w

2 is a working principle diagram of a non-leaked magneto-optical gap magnetic surface fast mode unidirectional turning waveguide.

Fig. 3 is a graph showing a first embodiment of the forward-reverse transmission efficiency of the unidirectionally curved waveguide with no leakage magneto-optical gap as a function of the optical frequency.

4 is a graph showing a second embodiment of the forward-reverse transmission efficiency of a non-leaked magneto-optical gap unidirectional cornering waveguide as a function of lightwave frequency.

Fig. 5 is a graph showing a third embodiment of the forward-reverse transmission efficiency of the unidirectional curved waveguide with no leakage magneto-optical gap as a function of the optical frequency.

Fig. 6 is a graph showing a fourth embodiment of the forward-reverse transmission efficiency of the unidirectionally curved waveguide with no leakage magneto-optical gap as a function of the optical frequency.

detailed description

As shown in FIG. 1, the leakage-free low-loss type magneto-optical gap magnetic surface fast mode arbitrary angle one-way turning waveguide of the present invention comprises an optical input port 1, an optical output port 2, and a first magneto-optical material layer 3, two magneto-optical material layer 4, a dielectric layer 5, a first absorbing layer 6, a second absorbing

layer

7, 8, 9 and fourth absorbing layer two opposite directions absorbing layer a third bias magnetic field H ₀ The unidirectional turning waveguide is composed of a magneto-optical gap waveguide, and the working mode of the unidirectional turning waveguide is TE mode, and the first magneto-optical material layer 3, the second magneto-optical material layer 4 and the dielectric layer 5 are a three-layer optical waveguide. The optical waveguide can transmit optical signals unidirectionally, serving as a photodiode and an isolator, and the photodiode and isolator are composed of a first magneto-optical material layer 3, a second magneto-optical material layer 4, and a dielectric layer 5. The three-layer structure is a flat waveguide structure, and the three-layer structure is curved at an arbitrary angle, and the shape bent at an arbitrary angle is a circular arc shape (arc-shaped turning type curved waveguide), for example, when the turning angle is 45 degrees, it is eight points. One ring; when the turning angle is 90 degrees, it is a quarter ring; when the turning angle is 180 degrees, it is a half ring, etc., and so on. The bending at any angle can be any angle between 0 and 180 degrees. The bending angle of the unidirectional turning waveguide can also be between 0 and 180 degrees. Only the commonly used waveguide turning angles are shown in the figure: 30 degrees. 45 degrees, 60 degrees, 90 degrees, 120 degrees, 135 degrees, 150 degrees and 180 degrees. Figure 1 (a) one-way turning angle is 30 degrees, Figure 1 (b) one-way turning angle is 45 degrees, Figure 1 (c) one-way turning angle is 60 degrees, Figure 1 (d), (i) single The turning angle is 90 degrees, the one-way turning angle of Figure 1 (e) is 120 degrees, the one-way turning angle of Figure 1 (f) is 135 degrees, the one-way turning angle of Figure 1 (g) is 150 degrees, and Figure 1 ( h) The one-way turning angle is 180 degrees. Since the device structure of the present invention satisfies the symmetry conservation, that is, its corresponding mirror structure can also work effectively, both of the structures of FIGS. 1(d) and (i) are mirror-symmetrical and have the same operational characteristics. The first magneto-optical material layer 3, the second magneto-optical material layer 4, and the dielectric layer 5 are connected to the optical input port and the optical output end by an arbitrary angular bending shape. The dielectric layer 5 is a region where the light energy is mainly concentrated, and the gap between the first magneto-optical material 3 and the second magneto-optical material 4 is the dielectric layer 5, and the dielectric layer 5 has a ring shape in the curved portion of the waveguide, and the inner arc of the ring The radius r, the outer arc radius r+w, the length of the curved portion depends on the turning angle; the dielectric layer 5 is vacuum, air, silicon dioxide (glass), and a transparent plastic wave. The first magneto-optical material layer 3, the second magneto-optical material layer 4 and the dielectric layer 5 constitute a photodiode and an isolator capable of unidirectionally transmitting optical signals, a first magneto-optical material layer 3, a second magneto-optical material layer 4 and a dielectric layer The surface of 5 is a magnetic surface fast wave. The magneto-optical material is magneto-optical glass or various rare earth-doped garnets and rare earth-transition metal alloy films. The first magneto-optical material layer 3 and the second magneto-optical material layer 4 are respectively provided with oppositely directed bias static magnetic fields H _{0 ,} that is, a bias magnetic field ⊙H ₀ (outer) and a bias magnetic field ⊕H ₀ (in), The bias magnetic field H ₀ is generated by an electromagnet or a permanent magnet. When the static magnetic field H ₀ to the drawing outwardly perpendicular magneto-optical material 3 is applied, the magneto-optical material 4 is applied perpendicular to the static magnetic field H ₀ in the paper facing, unidirectional turning to port 1 of the optical waveguide input port 1, port 2 For the light output port. The first absorbing layer 6, the second absorbing layer 7, the third absorbing layer 8 and the fourth absorbing layer 9 are the same or different absorbing materials, and the absorbing materials are polyurethane, graphite, graphene, carbon black, Carbon fiber epoxy resin mixture, graphite thermoplastic material mixture, boron fiber epoxy resin mixture, graphite fiber epoxy resin mixture, epoxy polysulfide, silicone rubber, urethane, fluoroelastomer, polyether ether ketone, poly Ether sulfone, polyaryl sulfone or polyethylene imine. The first absorbing layer 6, the second absorbing layer 7, the third absorbing layer 8, and the fourth absorbing layer 9 are each at a distance of 1/4 to 1/2 wavelength from the surface of the flat waveguide, and the first absorbing wave The thicknesses of the layer 6, the second wave absorbing layer 7, the third wave absorbing layer 8, and the fourth wave absorbing layer 9 are each not less than 1/4 wavelength, respectively.

The magnetic surface wave generated by the magneto-optical material-medium interface is a phenomenon similar to the metal surface plasmon (SPP). Under the action of the biased static magnetic field, the magneto-optical material has a magnetic permeability of tensor, and at the same time, its effective refractive index is negative in a certain optical band. Thus, the surface of the magneto-optical material is capable of producing a guided wave and has a property of unidirectional propagation, which is called a surface acoustic wave (Surface Magnetically Polarized Wave, SMP).

The invention has no leakage and low loss type magneto-optical gap magnetic surface fast mode arbitrary angle one-way cornering waveguide based on the non-reciprocity of magneto-optical materials, and can be produced by combining magneto-optical materials and medium interfaces. A unidirectional turning waveguide with excellent properties developed by the characteristics of surface waves. The magneto-optical material, the medium and the magneto-optical material three-layer structure waveguide and the absorbing layer are combined, and the magnetic surface fast wave generated by the magneto-optical material and the medium interface is used for unidirectional bending transmission of light, and the absorbing layer absorbs unnecessary waves and eliminates Optical path interference.

The technical scheme of the invention realizes the design of the unidirectional turning waveguide based on the optical non-reciprocity of the magneto-optical material and the unique conductive surface wave characteristic of the magneto-optical material and the medium interface. The basic principles of this technical solution are as follows:

The magneto-optical material is a material having magnetic anisotropy, and the magnetic dipole inside the magneto-optical material is arranged in the same direction by the application of a static magnetic field, thereby generating a magnetic dipole moment. The magnetic dipole moment will interact strongly with the optical signal, which in turn produces a non-reciprocal transmission of light. The magnetic permeability tensor of the magneto-optical material is under the action of a bias magnetic field H ₀ oriented in the direction perpendicular to the vertical paper:

The matrix elements of the permeability tensor are given by the following equations:

Where μ ₀ is the magnetic permeability in vacuum, γ is the gyromagnetic ratio, H ₀ is the applied magnetic field, M _s is the saturation magnetization, ω is the operating frequency, and α is the loss coefficient. If the direction of the biasing magnetic field is changed to the vertical paper facing direction, H ₀ and M _s will change the sign.

The magnetic surface wave generated by the magneto-optical material-medium interface can be based on the magnetism of the magneto-optical material. The conductivity tensor and Maxwell's equations are solved. The electric and magnetic fields that satisfy the surface wave (TE wave) at the interface should have the following form:

Where i=1 represents the magneto-optical material region and i=2 represents the dielectric region. Substituting Maxwell's equations:

According to the constitutive relation and the boundary conditions, the transcendental equation about the wave vector k _z of the magnetic surface wave can be obtained:

among them,

It is the effective permeability of magneto-optical materials. This transcendental equation can be solved by a numerical solution, and finally the value of k _z is obtained. It can also be seen from the equation that since the equation contains the term of μ _κ k _z , the surface acoustic wave has non-reciprocity (one-way propagation).

It can be seen that if a three-layer structure of magneto-optical material-medium-magneto-optical material is used, and a static magnetic field in the opposite direction is added at the first magneto-optical material layer 3 and the second magneto-optical material layer 4, an effective one-way is formed. waveguide. And due to the characteristics of the surface acoustic wave (SMP), the curved waveguide will theoretically have no loss due to the curved structure. As shown in Fig. 2, yttrium iron garnet (YIG) is used as the magnetic anisotropic material, the dielectric layer 5 is air (n ₀ =1), the bias magnetic field is 900 Oe, and the thickness of the dielectric layer is w=5 mm. The distance between the absorbing layer 6, the second absorbing layer 7, the third absorbing layer 8 and the fourth absorbing layer 9 and the waveguide respectively is w ₁ = 5 mm, and the radius of the inner arc of the ring is r = 30 mm. The operating frequency f of the device is determined by the dielectric constants ε ₁ , ε ₂ and the magnetic permeability [μ ₁ ], μ _{2 of} the magneto-optical material and the medium. The operating frequency is f = 6 GHz, and the YIG material loss coefficient α = 3 × 10 ^-4 , the turning angle is 90 degrees. The magnetic field at the first magneto-optical material 3 faces the vertical paper, and the magnetic field at the second magneto-optical material 4 faces the vertical paper. When the light wave is input from the port 1, the magnetic surface wave of the unidirectional forward transmission is generated at the interface between the two magneto-optical materials and the medium at the same time, and finally outputted from the port 2; when the light wave is input from the port 2, due to the non-mutual wave of the magnetic surface wave Ease of light causes the light wave to be reversed in the device and cannot be output from port 1, and the light energy is completely blocked at port 2. At the same time, it can be seen that the light wave can be well confined to the curved waveguide, and the loss value is very low.

The invention discloses a three-layer structure characteristic of a magneto-optical material-medium-magneto-optical material, and a structural dimension and a parameter thereof, for example, an inner arc radius of a ring, a non-leakage low-loss type magneto-optical gap magnetic surface fast mode arbitrary angle one-way cornering waveguide r and the dielectric layer thickness w can be flexibly selected according to the working wavelength and actual needs. Changing the size has no major impact on device performance.

Four embodiments are given below with reference to the accompanying drawings. In the embodiment, YAG is used as the magnetic anisotropic material, the bias magnetic field is 900 Oe, and the dielectric layer 5 is air (n ₀ =1). The thickness of the layer 5 is w=5 mm, and the distance between the first absorbing layer 6, the second absorbing layer 7, the third absorbing layer 8, and the fourth absorbing layer 9 and the waveguide is respectively w ₁ = 5 mm, a circle The inner arc radius of the ring is r=30mm, the YIG material loss coefficient α=3×10 ^-4 , the operating frequency f of the device is the dielectric constant ε ₁ , ε ₂ and magnetic permeability [μ ₁ ] of the magneto-optical material and the medium. , μ ₂ is determined.

Example 1

Referring to Fig. 1(b), the one-way cornering waveguide is composed of a magneto-optical gap waveguide with a turning angle of 45 degrees. In the working frequency band, the light wave input from port 1 will generate a magnetic meter inside the device. The surface wave, which in turn is output from port 2 through the device, and the light wave input from port 2 will be blocked by the device and cannot be output from port 1. Referring to Figure 3, the unidirectional cornering waveguide has an operating frequency range of 4.99 GHz to 7.29 GHz. In the operating frequency range, considering the material loss, the unidirectional turning waveguide achieves a maximum forward-reverse transmission isolation of 23.215 dB and a forward transmission insertion loss of 0.0228 dB.

Example 2

Referring to Figures 1(d) and (i), the unidirectional turning waveguide is composed of a magneto-optical gap waveguide having a turning angle of 90 degrees. In the operating band, the light wave input from port 1 will generate a magnetic surface wave inside the device, which is then output from port 2 through the device; and the light wave input from port 2 will be blocked by the device and cannot be output from port 1. Referring to Figure 4, the operating frequency range of the unidirectional cornering waveguide is 5.04 GHz to 7.44 GHz. In the operating frequency range, considering the material loss, the one-way cornering waveguide achieves a maximum forward-reverse transmission isolation of 25.513 dB and a forward transmission insertion loss of 0.0123 dB.

Example 3

Referring to Fig. 1(f), the one-way cornering waveguide is composed of a magneto-optical gap waveguide with a turning angle of 135 degrees. In the operating band, the light wave input from port 1 will generate a magnetic surface wave inside the device, which is then output from port 2 through the device; and the light wave input from port 2 will be blocked by the device and cannot be output from port 1. Referring to Figure 5, the operating frequency range of the unidirectional cornering waveguide is 5.05 GHz to 7.41 GHz. In the operating frequency range, considering the material loss, the one-way cornering waveguide achieves a maximum forward-reverse transmission isolation of 23.372 dB and a forward transmission insertion loss of 0.0200 dB.

Example 4

Referring to Fig. 1(h), the one-way cornering waveguide is composed of a magneto-optical gap waveguide with a turning angle of 180 degrees. In the operating band, the light wave input from port 1 will generate a magnetic surface wave inside the device, which is then output from port 2 through the device; and the light wave input from port 2 will be blocked by the device and cannot be output from port 1. Referring to Figure 6, the unidirectional cornering waveguide has an operating frequency range of 4.99 GHz to 7.33 GHz. In the operating frequency range, considering the material loss, the one-way cornering waveguide has a maximum forward-reverse transmission isolation of 27.545 dB and a forward transmission insertion loss of 0.00765 dB.

The transmission efficiency curve of the magneto-optical gap magnetic surface fast mode unidirectional turning waveguide with different turning angles of FIG. 3, FIG. 4, FIG. 5 and FIG. 6 can obtain the optical frequency range of the magnetic surface fast wave transmitted by the magneto-optical air-bending waveguide. That is, the operating frequency range of the unidirectional turning waveguide. It can be seen from the results that the low loss type magneto-optical gap magnetic surface fast mode arbitrary angle one-way corner waveguide of the present invention can work effectively.

The invention described above is susceptible to modifications of the specific embodiments and applications, and should not be construed as limiting the invention.

Claims

A leakage-free low-loss magneto-optical gap magnetic surface fast mode arbitrary-angle unidirectional turning waveguide, characterized in that it comprises an optical input port (1), a light output port (2), and two magneto-optical material layers ( 3, 4), a dielectric layer (5), four absorbing layers (6), (7), (8) and (9) and two opposite bias magnetic fields; the magneto-optical material layer (3) 4) and the dielectric layer (5) is a three-layer structure optical waveguide, the three-layer structure is curved at an arbitrary angle, and two opposite directions are disposed at the magneto-optical material layer (3, 4) a magnetic field; a gap between the layers of magneto-optical material (3, 4) is a dielectric layer (5), a port (1) of the unidirectional curved waveguide is an optical input port, and a port (2) is a light output port; The dielectric layer (5) is annular in shape at the curved portion of the waveguide; the surface of the magneto-optical material (3, 4) and the surface of the dielectric layer (5) are magnetic surface fast waves.
The leak-free low-loss magneto-optical-void magnetic surface fast mode arbitrary-angle unidirectional turning waveguide according to claim 1, wherein the photodiode and the isolator are composed of a layer of magneto-optical material (3, 4) and a dielectric layer (5) ) constitutes.
The non-leakage low loss type magneto-optical gap magnetic surface fast mode arbitrary angle one-way cornering waveguide according to claim 1, wherein the magneto-optical material is magneto-optical glass or various rare earth doped garnets and rare earths. - Materials such as transition metal alloy films.
A non-leakage low loss type magneto-optical gap magnetic surface fast mode arbitrary angle one-way cornering waveguide according to claim 1, wherein said magneto-optical material layer (3, 4) and dielectric layer (5) pass any angle The curved shape is connected to the optical input port (1) and the optical output port (2).
The non-leakage low loss type magneto-optical gap magnetic surface fast mode arbitrary angle one-way corner waveguide according to claim 1, wherein the dielectric layer (5) is vacuum, air, and two Silicon oxide or working wave transparent plastic.
The leak-free low-loss magneto-optical-void magnetic surface fast mode arbitrary-angle unidirectional turning waveguide according to claim 1, wherein the three-layer structure is a flat structure.
The leak-free low-loss type magneto-optical gap magnetic surface fast mode arbitrary-angle one-way cornering waveguide according to claim 1, wherein the arbitrary angle curved shape is a 30-degree curved shape, a 45-degree curved shape, and a 60-degree curved shape. Shape, 90 degree turn shape, 120 degree turn shape, 135 degree turn shape, 150 degree turn shape or 180 degree turn shape.
A leak-free low-loss magneto-optical-void magnetic surface fast mode arbitrary-angle unidirectional turning waveguide according to claim 1, wherein said absorbing layers (6), (7), (8) and (9) The same or different absorbing materials; the absorbing materials are polyurethane, graphite, graphene, carbon black, carbon fiber epoxy resin mixture, graphite thermoplastic material mixture, boron fiber epoxy resin mixture, graphite fiber epoxy Resin mixture, epoxy polysulfide, silicone rubber, urethane, fluoroelastomer, polyetheretherketone, polyethersulfone, polyarylsulfone or polyethyleneimine.
A leak-free low-loss magneto-optical-void magnetic surface fast mode arbitrary-angle unidirectional turning waveguide according to claim 1, wherein said absorbing layers (6), (7), (8) and (9) The distance from the surface of the flat waveguide is 1/4 to 1/2 wavelength, respectively; the thickness of the absorbing layers (6), (7), (8) and (9) are not less than 1/4 respectively. wavelength.
A non-leakage low loss type magneto-optical gap magnetic surface fast mode arbitrary angle one-way cornering waveguide according to claim 1, wherein said bias magnetic field is generated by an electromagnet or a permanent magnet; said one-way turning waveguide is The magneto-optical gap waveguide is configured; the working mode of the one-way corner waveguide is TE mode.