Faraday rotator for magneto-optical switch and magneto-optical switch

Abstract

The utility model discloses a kind of Faraday rotator and magneto-optical switch for magneto-optical switch, it is related to optical device technical field, wherein, Faraday rotator includes coil framework, magneto-optical crystal and multiple magnetic field generating components;Magneto-optical crystal is located at coil framework;Multiple magnetic field generating components are connected in parallel, multiple magnetic field generating components are spaced and arranged side by side, and from one end of coil framework, the other end of coil framework is wound, and single-layer solenoid inductance structure is formed;The technical scheme provided by the utility model can solve the problems of poor heat dissipation performance and slow switching speed of existing magneto-optical switch.

Description

Technical Field

[0001] This utility model relates to the field of optical device technology, and in particular to a Faraday rotator and a magneto-optical switch for use in magneto-optical switching. Background Technology

[0002] A magneto-optical switch is a key device that uses the magneto-optical effect to switch optical signals, and it has broad application prospects in optical communication, optical sensing, and other fields. The Faraday rotator, as the core component of the magneto-optical switch, directly affects the overall performance of the switch.

[0003] Traditional Faraday rotators have several shortcomings in terms of magnetic field generation and coil winding. For example, some Faraday rotators use loosely wound coils for their magnetic field generation components, resulting in uneven magnetic field distribution. This can lead to nonlinear effects, causing distortion of some optical signals and significantly impacting the rotation angle, stability, and reliability of the optical signal. Conversely, some Faraday rotators use tightly wound coils for their magnetic field generation components, resulting in high power consumption in the magneto-optical switch, severe heat generation during continuous operation, and a significantly shortened device lifespan. Furthermore, some Faraday rotators have large inductance and time constants, causing a significant lag in the magnetic field response speed. This results in magneto-optical switch switching times generally exceeding tens of microseconds, making it difficult to meet the nanosecond-level fast switching requirements of modern optical communication networks. Utility Model Content

[0004] The main purpose of this invention is to propose a Faraday rotator and a magneto-optical switch for magneto-optical switching, aiming to solve the problems of poor heat dissipation performance and slow switching speed of existing magneto-optical switches.

[0005] To achieve the above objectives, the present invention proposes a Faraday rotator for a magneto-optical switch, comprising:

[0006] Coil frame;

[0007] A magneto-optical crystal is disposed on the coil frame;

[0008] Multiple magnetic field generating components are arranged in parallel, spaced apart and side by side, and wound from one end of the coil frame to the other end of the coil frame to form a single-layer solenoid inductor structure.

[0009] In one embodiment, the coil frame is coaxially arranged with the plurality of magnetic field generating components.

[0010] In one embodiment, the plurality of magnetic field generating components include a first magnetic field generating component, a second magnetic field generating component, a third magnetic field generating component, and a fourth magnetic field generating component. The first magnetic field generating component includes a first coil with multiple turns, the second magnetic field generating component includes a second coil with multiple turns, the third magnetic field generating component includes a third coil with multiple turns, and the fourth magnetic field generating component includes a fourth coil with multiple turns. The first coil, the second coil, the third coil, and the fourth coil have the same number of turns.

[0011] In one embodiment, the first coil with multiple turns is wound with a first enameled wire, the second coil with multiple turns is wound with a second enameled wire, the third coil with multiple turns is wound with a third enameled wire, and the fourth coil with multiple turns is wound with a fourth enameled wire. The first enameled wire, the second enameled wire, the third enameled wire, and the fourth enameled wire are arranged side by side at equal intervals.

[0012] In one embodiment, the first, second, third, and fourth enameled wires are all connected to a common terminal at their beginning ends, and the last ends of the first, second, third, and fourth enameled wires are all connected to another common terminal.

[0013] In one embodiment, the first enameled wire, the second enameled wire, the third enameled wire, and the fourth enameled wire have the same wire diameter.

[0014] In one embodiment, the magneto-optical crystal is disposed on the coil frame and located in the middle of the coil frame.

[0015] In one embodiment, the magneto-optical crystal is a rare-earth iron garnet crystal.

[0016] In one embodiment, the coil frame is made of epoxy resin.

[0017] This invention also proposes a magneto-optical switch, including the Faraday rotator for magneto-optical switching as described above.

[0018] The technical solution of this invention arranges multiple parallel magnetic field generating components side-by-side at intervals, forming a single-layer solenoid-type inductor structure wound from one end of the coil frame to the other. This structure reduces overlap between components, lowers the overall resistance and inductance, thereby directly reducing power consumption and heat generation, allowing the components to maintain a lower temperature during continuous operation and extending their service life. Simultaneously, this layout ensures the uniformity of the magnetic field distribution, avoiding nonlinear effects caused by magnetic field inhomogeneity, reducing optical signal distortion, and ensuring the accuracy and stability of the optical signal rotation angle. Furthermore, a smaller inductance value also means a shorter time constant, which accelerates the magnetic field response speed, enabling the magneto-optical switch to complete switching within nanoseconds, meeting the high-speed switching requirements of modern optical communication networks. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the structure of the Faraday rotator for a magneto-optical switch provided by this utility model;

[0021] Figure 2 An axial schematic diagram of multiple magnetic field generating components of the Faraday rotator for magneto-optical switches provided by this utility model;

[0022] Figure 3 A schematic diagram of the vertical axis of multiple magnetic field generating components of the Faraday rotator for magneto-optical switch provided by this utility model;

[0023] Figure 4 Simulation diagram of the rise time of the magneto-optical switch provided by this utility model;

[0024] Figure 5 A simulation diagram of the fall time of the magneto-optical switch provided by this utility model.

[0025] Explanation of icon numbers:

[0026] 100. Faraday rotator; 110. Coil frame; 120. Magneto-optic crystal; 130. Magnetic field generating component; 131. First magnetic field generating component; 1311. First coil; 13111. First enameled wire; 132. Second magnetic field generating component; 1321. Second coil; 13211. Second enameled wire; 133. Third magnetic field generating component; 1331. Third coil; 13311. Third enameled wire; 134. Fourth magnetic field generating component; 1341. Fourth coil; 13411. Fourth enameled wire.

[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0029] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0030] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0031] Understandably, magneto-optical switches are key devices that utilize the magneto-optical effect to switch optical signals, and they have broad application prospects in optical communication, optical sensing, and other fields. The Faraday rotator, as the core component of a magneto-optical switch, directly affects its overall performance. Traditional Faraday rotators have some shortcomings in magnetic field generation and coil winding. For example, some Faraday rotators use loosely wound coils for their magnetic field generation components, resulting in uneven magnetic field distribution, which further induces nonlinear effects, causing distortion of some optical signals and significantly affecting the rotation angle, stability, and reliability of the optical signal. Other Faraday rotators use tightly wound coils for their magnetic field generation components, leading to high power consumption, severe heat generation during continuous operation, and significantly shortened device lifespan. Furthermore, some Faraday rotators have large inductance and time constants, resulting in a severely delayed magnetic field response speed. This causes the switching time of magneto-optical switches to generally exceed the tens of microseconds, making it difficult to meet the nanosecond-level fast switching requirements of modern optical communication networks.

[0032] Therefore, this utility model proposes a Faraday rotator 100 for magneto-optical switches, aiming to solve the problems of poor heat dissipation performance and slow switching speed of existing magneto-optical switches.

[0033] Please see Figure 1 and Figure 2 In one embodiment of this utility model, the Faraday rotator 100 for a magneto-optical switch includes:

[0034] Coil frame 110;

[0035] A magneto-optical crystal 120 is disposed on the coil frame 110;

[0036] Multiple magnetic field generating components 130 are arranged in parallel, spaced apart and side by side, and wound from one end of the coil frame 110 to the other end of the coil frame 110 to form a single-layer solenoid inductor structure.

[0037] It is important to understand that, in addition to the Faraday rotator 100 mentioned above, the magneto-optical switch may also include optical components such as an input collimator, an output collimator, a polarization beam splitter, and a reflector. When the magneto-optical switch is operating, the optical signal enters the switch through the input collimator, is split into beams of different polarization states by the polarization beam splitter, and one of these beams passes through the Faraday rotator 100. Under the influence of an external magnetic field, its polarization direction rotates. The rotated beam continues to propagate and is reflected by the reflector, then reoriented by the polarization beam splitter to the output collimator, ultimately outputting an optical signal in the target direction. By controlling the on / off state and direction of the magnetic field generating component 130 in the Faraday rotator 100, dynamic switching of the optical signal path can be achieved, thereby completing the conduction or redirection of the optical path and meeting the requirements for optical signal routing and control in optical communication systems.

[0038] This embodiment mainly describes in detail the composition and working principle of the Faraday rotator 100. The Faraday rotator 100 includes a coil frame 110, a magneto-optical crystal 120, and multiple magnetic field generating components 130. The coil frame 110 provides physical support and a winding foundation for the entire Faraday rotator 100, ensuring the mechanical stability and spatial compactness of the Faraday rotator 100. The magneto-optical crystal 120 is disposed on the coil frame 110, and preferably located at the very center of the coil frame 110, so that the magneto-optical crystal 120 is in the core region of the uniform magnetic field generated by the magnetic field generating components 130, ensuring that the optical signal can obtain the best Faraday rotation effect when passing through, and improving the accuracy and stability of optical signal conversion. The parallel connection of multiple magnetic field generating components 130 means that each magnetic field generating component 130 is independently connected to the circuit and works together. This not only reduces the overall resistance, energy loss and heat generation during operation, but also makes the current distribution more balanced, improves the efficiency and uniformity of magnetic field generation, and effectively avoids the nonlinear effects and optical signal distortion caused by uneven magnetic field distribution under the traditional winding method.

[0039] It is worth mentioning that multiple magnetic field generating components 130 are wound alternately and side-by-side on the coil frame 110, forming a single-layer solenoid-type inductor structure. That is, each magnetic field generating component 130 is spirally wound from one end of the coil frame 110 to the other, with only one layer and no overlap or multiple layers. This single-layer layout ensures that the magnetic field generated by all magnetic field generating components 130 can uniformly cover the area where the magneto-optical crystal 120 is located, avoiding the problems of local overheating and magnetic field non-uniformity caused by traditional dense winding methods. At the same time, due to the single-layer structure, the total length and resistance of the coil in the magnetic field generating component 130 can be reduced, thereby reducing the power consumption and heat generation of the entire Faraday rotator 100, and making the inductance value smaller, the time constant is also reduced accordingly, improving the magnetic field response speed, which helps to achieve fast, stable and reliable optical signal switching.

[0040] The technical solution of this utility model involves arranging multiple parallel magnetic field generating components 130 side-by-side at intervals, and winding them from one end of the coil frame 110 to the other to form a single-layer solenoid-type inductor structure. This structure reduces overlap between components, lowers the overall resistance and inductance, thereby directly reducing power consumption and heat generation, allowing the components to maintain a lower temperature during continuous operation and extending their service life. Simultaneously, this layout ensures the uniformity of the magnetic field distribution, avoiding nonlinear effects caused by magnetic field inhomogeneity, reducing optical signal distortion, and ensuring the accuracy and stability of the optical signal rotation angle. Furthermore, a smaller inductance value also means a shorter time constant, which accelerates the magnetic field response speed, enabling the magneto-optical switch to complete switching within nanoseconds, meeting the requirements of modern optical communication networks for rapid switching.

[0041] Please see Figure 1 and Figure 2 In one embodiment of this utility model, the coil frame 110 is coaxially arranged with multiple magnetic field generating components 130.

[0042] In this embodiment, the coil frame 110 is coaxially arranged with multiple magnetic field generating components 130. This means that the central axis of the coil frame 110 coincides with the central axis of each magnetic field generating component 130. All magnetic field generating components 130 are distributed around the same axis and wound on the coil frame 110. This ensures that the magnetic field is uniformly distributed along the axial direction, improves the magnetic field consistency in the region of the magneto-optical crystal 120, and thus effectively enhances the accuracy and stability of the Faraday rotator 100 in controlling the polarization state of the optical signal.

[0043] Please see Figure 3 In one embodiment of the present invention, a plurality of magnetic field generating components 130 include a first magnetic field generating component 131, a second magnetic field generating component 132, a third magnetic field generating component 133, and a fourth magnetic field generating component 134. The first magnetic field generating component 131 includes a multi-turn first coil 1311, the second magnetic field generating component 132 includes a multi-turn second enameled wire 1321, the third magnetic field generating component 133 includes a multi-turn third coil 1331, and the fourth magnetic field generating component 134 includes a multi-turn fourth coil 1341. The first coil 1311, the second enameled wire 1321, the third coil 1331, and the fourth coil 1341 have the same number of turns.

[0044] In this embodiment, the multiple magnetic field generating components 130 include a first magnetic field generating component 131, a second magnetic field generating component 132, a third magnetic field generating component 133, and a fourth magnetic field generating component 134. Each magnetic field generating component 130 is composed of a multi-turn coil. Specifically, the first magnetic field generating component 131 includes a multi-turn first coil 1311, the second magnetic field generating component 132 includes a multi-turn second enameled wire 1321, the third magnetic field generating component 133 includes a multi-turn third coil 1331, and the fourth magnetic field generating component 134 includes a multi-turn fourth coil 1341. The first coil 1311, the second enameled wire 1321, the third coil 1331, and the fourth coil 1341 have the same number of turns. This design ensures that each magnetic field generating component 130 can generate a magnetic field of the same intensity when energized, making the magnetic field distribution among them more consistent and avoiding the problem of magnetic field imbalance caused by the difference in the number of turns. This improves the uniformity and stability of the overall magnetic field and further enhances the accuracy and reliability of the Faraday rotator 100 in controlling the rotation angle of the optical signal.

[0045] Please see Figure 3In one embodiment of this utility model, the multi-turn first coil 1311 is wound with a first enameled wire 13111, the multi-turn second enameled wire 1321 is wound with a second enameled wire 13211, the multi-turn third coil 1331 is wound with a third enameled wire 13311, and the multi-turn fourth coil 1341 is wound with a fourth enameled wire 13411. The first enameled wire 13111, the second enameled wire 13211, the third enameled wire 13311, and the fourth enameled wire 13411 are arranged side by side at equal intervals.

[0046] In this embodiment, the multi-turn first coil 1311 is wound with first enameled wire 13111, the multi-turn second enameled wire 1321 is wound with second enameled wire 13211, the multi-turn third coil 1331 is wound with third enameled wire 13311, and the multi-turn fourth coil 1341 is wound with fourth enameled wire 13411. These enameled wires are arranged side-by-side at equal intervals, meaning that the first enameled wire 13111, the second enameled wire 13211, the third enameled wire 13311, and the fourth enameled wire 13411 are arranged parallel to each other at the same spacing on the coil frame 110, and each is independently wound into a multi-turn coil. This arrangement not only ensures that each magnetic field generating component 130 can contribute independently and uniformly to the generation of the overall magnetic field, but also avoids magnetic field interference or unevenness caused by inconsistent spacing between coils. Furthermore, by adopting an equidistant spacing method, electromagnetic interference between coils can be effectively reduced, and the stability and consistency of the magnetic field can be improved, thereby ensuring that the Faraday rotator 100 has higher accuracy and reliability during optical signal switching.

[0047] Please see Figure 3 In one embodiment of this utility model, the first ends of the first enameled wire 13111, the second enameled wire 13211, the third enameled wire 13311, and the fourth enameled wire 13411 are all connected to a common end, and the tail ends of the first enameled wire 13111, the second enameled wire 13211, the third enameled wire 13311, and the fourth enameled wire 13411 are all connected to another common end.

[0048] In this embodiment, the first enameled wire 13111, the second enameled wire 13211, the third enameled wire 13311, and the fourth enameled wire 13411 are all connected to a common terminal at their beginnings and to another common terminal at their ends. This means that the four enameled wires are electrically connected in parallel, allowing current to simultaneously enter all four wires from the first common terminal and converge to the second common terminal from the other end. This connection method enables the four enameled wires to work synchronously when energized, generating a magnetic field with the same direction and uniform distribution, thereby improving the consistency and stability of the magnetic field strength. Simultaneously, the parallel structure reduces the overall resistance of the Faraday rotator 100, reducing energy loss and heat generation, which helps improve the working efficiency and reliability of the Faraday rotator 100, meeting the performance requirements of the magneto-optical switch for fast response and stable operation.

[0049] Please see Figure 3 In one embodiment of this utility model, the first enameled wire 13111, the second enameled wire 13211, the third enameled wire 13311 and the fourth enameled wire 13411 have the same wire diameter.

[0050] In this embodiment, the wire diameters of the first enameled wire 13111, the second enameled wire 13211, the third enameled wire 13311, and the fourth enameled wire 13411 are preferably 0.04 mm. This setting ensures the consistency of the electrical characteristics of the enameled wires, so that the magnetic field strength generated by each coil is uniform under the same current, avoiding uneven current density and local overheating problems caused by differences in wire diameter. At the same time, the same wire diameter also helps to simplify the winding process, improve production consistency, and enhance the stability and reliability of the overall structure.

[0051] Please see Figure 1 In one embodiment of the present invention, the magneto-optical crystal 120 is disposed on the coil frame 110 and located in the middle of the coil frame 110.

[0052] In this embodiment, the magneto-optical crystal 120 is disposed on the coil frame 110 and located in the middle of the coil frame 110. This arrangement places the magneto-optical crystal 120 in the central region of the magnetic field generated by multiple magnetic field generating components 130, thereby enabling it to receive the most uniform and strongest magnetic field, which is beneficial to improving the efficiency and stability of the Faraday rotation effect. Placing the magneto-optical crystal 120 in the middle of the coil frame 110 not only helps to optimize the influence of the magnetic field distribution on it, but also ensures that the optical signal obtains a more accurate and consistent polarization rotation effect when passing through the magneto-optical crystal 120, thereby improving the accuracy and response speed of the magneto-optical switch in the optical communication system for controlling the optical signal.

[0053] Please see Figure 1 In one embodiment of this utility model, the magneto-optical crystal 120 is a rare earth iron garnet crystal.

[0054] In this embodiment, the rare-earth iron garnet crystal has a high magneto-optical coefficient and low coercivity, enabling it to achieve a large Faraday rotation angle under a relatively weak magnetic field, thus requiring a relatively low magnetic field strength. Simultaneously, the rare-earth iron garnet crystal matches the single-layer solenoid-type inductor structure designed in the above embodiment, which can significantly reduce the power consumption and temperature rise of the Faraday rotator 100 while meeting the magnetic field requirements, avoiding performance drift or structural aging problems caused by heat generation, thereby significantly enhancing the working stability and long-term reliability of the magneto-optical switch in complex environments.

[0055] Please see Figure 1 In one embodiment of this utility model, the magneto-optical crystal 120 has dimensions of 1.5mm × 1.5mm × 0.475mm.

[0056] Please see Figure 1 In one embodiment of this utility model, the coil frame 110 is made of epoxy resin.

[0057] In this embodiment, epoxy resin possesses excellent insulation properties, mechanical strength, and dimensional stability, effectively supporting multiple parallel magnetic field generating components 130 and ensuring their structural integrity during winding and operation. Simultaneously, epoxy resin also exhibits excellent heat resistance and corrosion resistance, maintaining stability during long-term operation of the magneto-optical switch and resisting deformation or aging due to temperature increases or environmental changes, thereby enhancing the reliability and service life of the entire Faraday rotator 100.

[0058] In addition, as a non-magnetic material, epoxy resin will not interfere with the magnetic field generated by the magnetic field generating component 130, which is conducive to the uniform distribution of the magnetic field and further ensures the stability of the magnetic field and the accuracy of optical signal modulation within the magneto-optical crystal 120 region.

[0059] This utility model also proposes a magneto-optical switch, which includes a Faraday rotator 100 for the magneto-optical switch. The specific structure of the Faraday rotator 100 for the magneto-optical switch is as described in the above embodiments. Since this magneto-optical switch adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0060] The magneto-optical switch in this embodiment, by employing the aforementioned Faraday rotator 100, can shorten the switching time and improve heat dissipation performance. A detailed analysis follows:

[0061] According to the formula for calculating the inductance of a multilayer coil:

[0062] ;

[0063] Where R is the coil radius, N is the number of coil turns, l is the coil length, t is the coil thickness, k(2R / l) is the Nagaoka coefficient, and C(l / t) is the correction coefficient.

[0064] As can be seen from the above formula for calculating the inductance of multilayer coils, when the coil radius R and coil thickness t remain unchanged, if the coil is wound with only one layer, that is, there is no longer a change in thickness caused by multiple layers, then the correction term C(l / t) involving thickness t in the original formula for calculating the inductance of multilayer structures will lose its multilayer meaning. At this time, the actual physical structure of the coil is equivalent to a single-layer solenoid structure, and the corresponding inductance calculation method is also simplified to a single-layer coil inductance formula that only depends on the coil radius, length and number of turns. Therefore, under this condition, the formula for calculating the inductance of multilayer coils naturally degenerates into a formula for calculating the inductance of single-layer structures.

[0065] With a fixed number of coil turns N, if four enameled wires are wound in series, the total series inductance is denoted as Ls. By winding four enameled wires in parallel, the number of coil turns of the four magnetic field generating components 130 is divided into N / 4, and the inductance values ​​of the four magnetic field generating components 130 are denoted as Ls1, Ls2, Ls3, and Ls4, respectively. The inductance values ​​of the four magnetic field generating components 130 are reduced to Ls / 16, and the total parallel inductance Lm is Ls / 64. By winding the enameled wires intermittently, the coil length l can be increased, which further reduces the inductance values ​​Ls1, Ls2, Ls3, and Ls4 of the four magnetic field generating components 130, and the total parallel inductance Lm will be even smaller, thereby greatly reducing the switching time of the magneto-optical switch.

[0066] According to the time constant formula:

[0067] ;

[0068] Where τ is the time constant, L is the inductance value, and R is the resistance value. From the above analysis and the time constant formula, it can be seen that the time constant is positively correlated with the inductance value. When the inductance value of each magnetic field generating component 130 decreases, the time constant also decreases, that is, the switching time of the magneto-optical switch is reduced.

[0069] According to the resistance determination formula:

[0070] ;

[0071] Where ρ is the resistivity of the enameled wire, l is the length of the enameled wire, and S is the cross-sectional area of ​​the enameled wire. Considering that parallel connection of enameled wires will reduce the resistance R, this invention reduces the diameter of the enameled wire to reduce the cross-sectional area S, thereby increasing the resistance R, and further reduces the time constant.

[0072] Considering the influence of mutual inductance on the four magnetic field generating components 130 connected in parallel, the corresponding equivalent inductance is in the case of parallel connection in phase. According to the mutual inductance formula:

[0073] ;

[0074] The mutual inductance coupling coefficient k is taken as 0.8.

[0075] Based on the formula for calculating the mutual inductance of parallel coils in phase:

[0076] ;

[0077] According to the mutual inductance formula and the formula for calculating the mutual inductance of parallel coils in phase, when the number of coil turns N is constant, the total mutual inductance Lc of the parallel coils of the four magnetic field generating components 130 is still much smaller than the total series inductance Ls.

[0078] Therefore, it can be seen that, in combination Figure 4-5 The simulation diagram shows that the Faraday rotator 100 for magneto-optical switching in this embodiment can improve both the rise time and fall time of the magneto-optical switch to 800ns.

[0079] Furthermore, the Faraday rotator 100 for magneto-optical switches in this application employs a method in which multiple magnetic field generating components 130 are wound at intervals, which can increase air circulation, reduce heat accumulation, and thus improve the overall heat dissipation performance of the magneto-optical switch.

[0080] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A Faraday rotator for a magneto-optical switch, characterized in that, include: Coil frame; A magneto-optical crystal is disposed on the coil frame; Multiple magnetic field generating components are arranged in parallel, spaced apart and side by side, and wound from one end of the coil frame to the other end of the coil frame to form a single-layer solenoid inductor structure.

2. The Faraday rotator for a magneto-optical switch as described in claim 1, characterized in that, The coil frame is coaxially arranged with the plurality of magnetic field generating components.

3. The Faraday rotator for a magneto-optical switch as described in claim 1, characterized in that, The plurality of magnetic field generating components include a first magnetic field generating component, a second magnetic field generating component, a third magnetic field generating component, and a fourth magnetic field generating component. The first magnetic field generating component includes a first coil with multiple turns, the second magnetic field generating component includes a second coil with multiple turns, the third magnetic field generating component includes a third coil with multiple turns, and the fourth magnetic field generating component includes a fourth coil with multiple turns. The first coil, the second coil, the third coil, and the fourth coil have the same number of turns.

4. The Faraday rotator for a magneto-optical switch as described in claim 3, characterized in that, The first coil with multiple turns is wound with a first enameled wire, the second coil with multiple turns is wound with a second enameled wire, the third coil with multiple turns is wound with a third enameled wire, and the fourth coil with multiple turns is wound with a fourth enameled wire. The first enameled wire, the second enameled wire, the third enameled wire, and the fourth enameled wire are arranged side by side at equal intervals.

5. The Faraday rotator for a magneto-optical switch as described in claim 4, characterized in that, The first, second, third, and fourth enameled wires are all connected to a common terminal at their beginning ends, and the last three enameled wires are all connected to another common terminal at their end ends.

6. The Faraday rotator for a magneto-optical switch as described in claim 4, characterized in that, The first enameled wire, the second enameled wire, the third enameled wire, and the fourth enameled wire have the same wire diameter.

7. The Faraday rotator for a magneto-optical switch as described in claim 1, characterized in that, The magneto-optical crystal is disposed on the coil frame and located in the middle of the coil frame.

8. The Faraday rotator for a magneto-optical switch as described in claim 1, characterized in that, The magneto-optical crystal is a rare-earth iron garnet crystal.

9. The Faraday rotator for a magneto-optical switch as described in any one of claims 1 to 8, characterized in that, The coil frame is made of epoxy resin.

10. A magneto-optical switch, characterized in that, Includes a Faraday rotator for magneto-optical switching as described in any one of claims 1 to 9.

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