Optical fiber array assembly using external permanent magnets, and optical module

Abstract

The present invention relates to an optical fiber array assembly using external permanent magnets, and an optical module. The optical fiber array assembly comprises an optical fiber array module and optical isolators, the optical fiber array module comprising a first clamping portion, a second clamping portion and at least two optical fibers, and the optical fibers being arranged in an array. The optical isolators are respectively arranged at an end portion of the optical fiber array module and correspond to the optical fibers, and the optical isolators are non-magnetic optical isolators; at least one side of each optical isolator is provided with a permanent magnet, and the optical isolator is at least within a magnetic force range of the adjacent permanent magnet, the optical isolator being configured to operate under the action of the magnetic force of the permanent magnet. The present optical fiber array assembly can effectively reduce the risk of demagnetization, such that the yield of the optical fiber array assembly can be improved, the rework rate can be reduced, and the stability and reliability of the entire optical fiber array assembly can be improved; moreover, the present invention can effectively reduce the cost and avoid the problem of the production progress being affected due to supply shortage and ordering difficulties, thus better meeting market requirements.

Description

A fiber optic array assembly and optical module utilizing an external permanent magnet Technical Field

[0001] This invention relates to the field of optical communication equipment technology, and more specifically to an optical fiber array assembly and optical module utilizing an external permanent magnet. Background Technology

[0002] Optical modules are crucial components in optical communication technology, primarily used for converting between photoelectric signals and signals. Existing optical modules typically consist of a base, top cover, PCBA board (circuit board), fiber optic interface, receiver (RX), and / or transmitter (TX). The receiver primarily performs photoelectric conversion, while the transmitter primarily performs electro-optical conversion.

[0003] In the transmit section (TX) of existing optical modules, a fiber optic array assembly is usually configured. For example, the fiber optic array assembly configured in the transmit section (TX) of 400G / 800G DR series optical modules typically includes a fiber optic array module and an optical isolator located at the front end of the fiber optic array module. The front end of the fiber optic array module corresponds to a fiber optic coupling lens, which allows the optical signal to enter the optical isolator through the fiber optic coupling lens and then enter the fiber optic array module through the optical isolator. The rear end of the fiber optic array module is connected to a fiber optic interface through an optical fiber, so as to connect to an external optical fiber and transmit the optical signal. Existing fiber optic array modules typically include a first clamping part (base), a second clamping part (cover plate), and at least two optical fibers. Each optical fiber is arranged in an array and clamped between the first and second clamping parts to fix the optical fibers, as shown in Figure 1. Optical isolators are usually placed at the front end of the fiber optic array module and correspond to each optical fiber, as shown in Figure 2. The main function of the optical isolator is to prevent backward transmission light generated in the optical path due to various reasons from adversely affecting the light source and the optical path system. It plays an important role in improving optical wave transmission efficiency, protecting the light source, and improving system stability.

[0004] Optical isolators typically operate under the influence of a magnetic field. Existing optical isolators in fiber optic array assemblies are self-magnetic optical isolators. These self-magnetic optical isolators include a magnetic element located in the middle and polarizers and analyzers located at both ends of the magnetic element, as shown in Figure 2. The magnetic element is a self-magnetized Faraday rotator. Before the optical isolator leaves the factory, the self-magnetized Faraday rotator in the optical isolator is magnetized, making the self-magnetized Faraday rotator magnetic, thereby ensuring that the entire optical isolator remains magnetic for a long time so that it can work normally in the fiber optic array assembly. However, in practical applications, it has been found that the optical isolator with its own magnetic field is at risk of demagnetization. For example, it is prone to demagnetization during reliability testing, and after demagnetization, it needs to be remagnetized and repaired. This not only leads to low yield and high repair rate of the fiber array components, but also results in low stability and reliability of the fiber array components. In addition, in this type of optical isolator with its own magnetic field, the magnetic element uses a self-magnetized Faraday rotator, which is made of a special material. This not only results in relatively high cost, but also easily leads to supply shortages and ordering difficulties, affecting production progress. This issue urgently needs to be addressed. Summary of the Invention

[0005] The first aspect of this invention addresses the aforementioned technical problems by providing a fiber optic array assembly that reduces the risk of demagnetization. This not only makes the fiber optic array assembly more stable and reliable but also helps to reduce costs. The main concept is as follows:

[0006] A fiber optic array assembly utilizing an external permanent magnet includes a fiber optic array module and an optical isolator. The fiber optic array module includes a first clamping part, a second clamping part, and at least two optical fibers clamped between the first clamping part and the second clamping part, with each optical fiber arranged in an array.

[0007] Each optical isolator is disposed at the end of the fiber array module and corresponds to each fiber. The optical isolators are non-magnetic optical isolators.

[0008] An optical isolator has a permanent magnet on at least one side, and the isolator is at least within the magnetic field range of the adjacent permanent magnet. The optical isolator is used to operate under the magnetic force of the permanent magnet. In this scheme, by directly placing the optical isolator at the end of the fiber array module, and making each optical isolator correspond to each fiber, the optical isolator is used to prevent back-propagating light from various causes in the optical path from adversely affecting the light source and the optical path system, which is beneficial to improving optical wave transmission efficiency, protecting the light source, and improving system stability. By configuring the optical isolator to be a non-magnetic ordinary optical isolator, and setting a permanent magnet on at least one side of the optical isolator, so that the optical isolator is at least within the magnetic field range of the adjacent permanent magnet, this design not only allows the optical isolator to operate under the magnetic force of the permanent magnet. The optical isolator operates normally and the permanent magnets do not pose a risk of demagnetization, thus greatly reducing the probability of demagnetization of the fiber optic array components. On the one hand, the production and manufacturing process does not require a magnetization step, which simplifies the process and eliminates the need for re-magnetization during subsequent use. This can improve the yield of the fiber optic array components, reduce the rework rate, and improve the stability and reliability of the entire fiber optic array components. On the other hand, the ordinary Faraday rotator configured in the non-magnetic optical isolator is made of common materials, is easier to obtain, and has a lower cost. It is less likely to cause problems such as supply shortages and ordering difficulties that affect the production schedule, and better meets market demand.

[0009] Preferably, the permanent magnet is fixed to the end of the fiber optic array module, resulting in a higher degree of integration of the entire fiber optic array assembly.

[0010] Preferably, the permanent magnet is attached to the end of the fiber optic array module. This simplifies the process and helps reduce costs.

[0011] Preferably, the optical isolator is attached to the end of the fiber optic array module. This simplifies the process and helps reduce costs.

[0012] Preferably, there is a gap between the optical isolator and the adjacent permanent magnet. This not only facilitates the assembly of the optical isolator and the permanent magnet, but also helps to obtain a more stable magnetic field at the optical isolator.

[0013] Preferably, the optical isolator includes a non-magnetic Faraday rotator, a polarizer, and an analyzer, with the polarizer and analyzer respectively disposed at both ends of the Faraday rotator.

[0014] Preferably, the optical isolator is constructed in a block shape, which facilitates production and manufacturing.

[0015] To ensure stable operation of the optical isolator, preferably, the permanent magnet includes an S-pole and an N-pole. The S-pole of the permanent magnet corresponds to the end of the fiber array module, and the N-pole of the permanent magnet is opposite to the end of the fiber array module; alternatively, the N-pole of the permanent magnet corresponds to the end of the fiber array module, and the S-pole of the permanent magnet is opposite to the end of the fiber array module. This allows magnetic field lines to pass through the optical isolator along its thickness direction, which helps to provide a more stable magnetic field for the optical isolator. This not only ensures the stable normal operation of the optical isolator but also facilitates better optical isolation.

[0016] Preferably, the thickness of the permanent magnet is greater than or equal to the thickness of the optical isolator, so that the magnetic field of the permanent magnet can better cover the entire optical isolator.

[0017] In some feasible solutions, the permanent magnet is constructed as a block-shaped structure or an arc-shaped structure.

[0018] In some feasible designs, each permanent magnet is positioned between two adjacent optical isolators. This allows the same permanent magnet to simultaneously provide a stable magnetic field for both optical isolators, which simplifies the structure.

[0019] A second aspect of this invention addresses the problem of improving the stability of optical isolators. Furthermore, permanent magnets are provided on at least both sides of the optical isolator. This allows for a higher magnetic field strength at the optical isolator, ensuring its stable operation.

[0020] Preferably, the permanent magnet has an L-shaped structure, with the optical isolator located inside the permanent magnet. This not only allows for a higher magnetic field strength at the optical isolator, ensuring stable operation, but also simplifies the manufacturing process and helps reduce costs.

[0021] Preferably, the permanent magnet has a U-shaped structure, with the optical isolator located inside the permanent magnet. This not only allows for a higher magnetic field strength at the optical isolator, ensuring stable operation, but also simplifies the manufacturing process and helps reduce costs.

[0022] Preferably, the permanent magnet has a U-shaped structure, with the optical isolator located inside the permanent magnet. This not only allows for a higher magnetic field strength at the optical isolator, ensuring stable operation, but also simplifies the manufacturing process and helps reduce costs.

[0023] Preferably, the permanent magnet is constructed in a cylindrical or square shape. This facilitates both production and manufacturing, as well as installation and disassembly.

[0024] The third aspect of this invention addresses the problem of simplifying the process and reducing costs while maintaining the magnetic field strength at the optical isolator. Preferably, the permanent magnet disposed at the front end of the fiber array module is an integrally formed component. The permanent magnet includes a magnetic strip and magnetic blocks disposed on one side of the magnetic strip and spaced apart from each other. Each optical isolator is located on the same side of the magnetic strip, and each optical isolator is separated from each other by the magnetic blocks. This not only allows the permanent magnet to surround at least two sides of the optical isolator, thereby obtaining a higher magnetic field strength at the optical isolator, ensuring stable operation of the optical isolator, but also helps to reduce the size of the permanent magnet while maintaining the magnetic field strength, thus contributing to a more compact structure of the fiber array assembly; moreover, installation and disassembly are simpler and more efficient, effectively simplifying the process and reducing costs.

[0025] Preferably, the permanent magnet disposed at the front end of the fiber optic array module is an integrally molded component. The permanent magnet includes two parallel magnetic strips and multiple magnetic blocks disposed between the two magnetic strips. The magnetic blocks are spaced apart, and each optical isolator is located between the two magnetic strips, and each optical isolator is separated from the others by the magnetic blocks. This not only allows the permanent magnet to surround at least three sides of the optical isolator, thereby obtaining a higher magnetic field strength at the optical isolator, ensuring stable operation of the optical isolator, but also helps to reduce the size of the permanent magnet while maintaining the magnetic field strength, thus contributing to a more compact structure of the fiber optic array assembly; moreover, installation and disassembly are simpler and more efficient, and the process can be effectively simplified, which helps to reduce costs.

[0026] Preferably, the permanent magnet disposed at the front end of the fiber optic array module is an integrally molded component. The permanent magnet has a plate-like structure with multiple through holes. The permanent magnet is fixed to the end of the fiber optic array module, and each optical isolator is located within one of the through holes. This design not only utilizes the permanent magnet to surround the optical isolator, thereby obtaining a higher magnetic field strength at the optical isolator, ensuring stable operation of the optical isolator, but also helps to reduce the size of the permanent magnet while maintaining the magnetic field strength, thus contributing to a more compact structure of the fiber optic array assembly. Furthermore, installation and disassembly are simpler and more efficient, effectively simplifying the process and reducing costs.

[0027] An optical module, including the fiber array assembly.

[0028] Compared with existing technologies, the fiber optic array assembly and optical module using an external permanent magnet provided by this invention can effectively reduce the risk of demagnetization, not only improve the yield of the fiber optic array assembly and reduce the rework rate, but also improve the stability and reliability of the entire fiber optic array assembly, effectively reduce costs, and are less likely to have production schedules affected by supply shortages and ordering difficulties, thus better meeting market demands. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 is a schematic diagram of the structure of an existing fiber optic array module.

[0031] Figure 2 is a schematic diagram of the structure of an existing fiber optic array assembly.

[0032] Figure 3 is a front view of a fiber optic array module provided in Embodiment 1 of the present invention, without an optical isolator installed.

[0033] Figure 4 is a left view of Figure 3.

[0034] Figure 5 is a schematic diagram of the structure of an optical fiber array assembly provided in Embodiment 1 of the present invention.

[0035] Figure 6 is a front view of the front end of the first type of fiber array module provided in Embodiment 1 of the present invention.

[0036] Figure 7 is one of the partial side views of Figure 6.

[0037] Figure 8 is a second partial side view of Figure 6.

[0038] Figure 9 is a front view of the front end of the second type of fiber array module provided in Embodiment 1 of the present invention.

[0039] Figure 10 is a front view of the front end of the third type of fiber array module provided in Embodiment 1 of the present invention.

[0040] Figure 11 is a front view of the front end of the fourth type of fiber array module provided in Embodiment 1 of the present invention.

[0041] Figure 12 is a front view of the front end of the fifth type of fiber array module provided in Embodiment 1 of the present invention.

[0042] Figure 13 is a front view of the front end of the sixth type of fiber array module provided in Embodiment 1 of the present invention.

[0043] Figure 14 is a front view of a fiber optic array assembly provided in Embodiment 2 of the present invention.

[0044] Figure 15 is a front view of the front end of the fiber optic array module in Figure 14.

[0045] Figure 16 is a front view of a fiber optic array assembly provided in Embodiment 3 of the present invention.

[0046] Figure 17 is a front view of the front end of the fiber array module in Figure 16.

[0047] Figure 18 is a front view of a fiber optic array assembly provided in Embodiment 4 of the present invention.

[0048] Figure 19 is a front view of the front end of the fiber optic array module in Figure 18.

[0049] The markings in the figure are as follows: Fiber optic array module 1, first clamping part 11, groove 111, second clamping part 12, fiber optic 13, front end 14, inclined surface 141; optical isolator 2, polarizer 21, self-magnetizing Faraday rotator 22, Faraday rotator 23, analyzer 24; permanent magnet 3, magnetic strip 31, magnetic block 32, through hole 33. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0051] Example 1

[0052] This embodiment provides a fiber optic array assembly utilizing an external permanent magnet, including a fiber optic array module 1 and multiple optical isolators 2. The fiber optic array module 1 includes a first clamping part 11, a second clamping part 12, and at least two optical fibers 13 clamped between the first clamping part 11 and the second clamping part 12. The optical fibers 13 are arranged in an array. In implementation, the number of optical fibers 13 can be determined according to actual needs, and can be two, three, four, etc. In a preferred embodiment, the number of optical fibers 13 configured in the fiber optic array module 1 can be a multiple of four, such as four or eight. For example, in this embodiment, the fiber optic array module 1 is configured with four optical fibers 13. The front ends of the four optical fibers 13 are clamped in an array between the first clamping part 11 and the second clamping part 12, as shown in Figures 3 and 4. The front ends of the optical fibers 13 can be flush with the front end 14 of the fiber optic array module 1, that is, the front ends of the optical fibers 13 can be flush with the front ends of the first clamping part 11 and the second clamping part 12, so as to better connect to the optical isolators 2.

[0053] During manufacturing, the front end face of the fiber array module 1 can be constructed as an inclined surface 141 in the vertical direction, as shown in Figure 3. That is, the front end faces of the first clamping part 11 and the second clamping part 12 can be constructed as inclined surfaces 141. At the same time, the front end face of the optical fiber can also be constructed as an inclined surface 141, which is more conducive to improving return loss.

[0054] In implementation, the first clamping part 11 can be glued to the second clamping part 12. In a further embodiment, the first clamping part 11 is constructed with grooves 111 for accommodating optical fibers 13, as shown in Figure 4. The number of grooves 111 is the same as the number of optical fibers 13, and each optical fiber 13 is disposed in its respective groove 111. The second clamping part 12 is connected to the first clamping part 11, thereby clamping the optical fibers 13 between the first clamping part 11 and the second clamping part 12, achieving a simpler, more stable, and reliable constraint of the optical fibers 13. Of course, in implementation, the second clamping part 12 can also be constructed with grooves 111 for accommodating optical fibers 13, with the number of grooves 111 being the same as the number of optical fibers 13, and each optical fiber 13 being disposed in its respective groove 111. The first clamping part 11 is connected to the second clamping part 12, and the optical fibers 13 are clamped between the first clamping part 11 and the second clamping part 12, achieving the same effect. In implementation, the groove 111 can be filled with adhesive; the groove 111 can preferably be a V-shaped groove, as shown in Figure 4; the first clamping part 11 can preferably be constructed as a plate-like structure or a similar plate-like structure; the second clamping part 12 can also preferably be constructed as a plate-like structure or a similar plate-like structure. Both the first clamping part 11 and the second clamping part 12 can preferably be made of glass.

[0055] In this embodiment, the number of optical isolators 2 is adapted to the number of optical fibers 13. For example, in this embodiment, the optical fiber array assembly is equipped with four optical isolators 2, as shown in Figures 4 and 5. Each optical isolator 2 is respectively disposed at the end of the optical fiber array module 1 and corresponds to each optical fiber 13. In specific implementation, the optical isolators 2 can be pasted to the end of the optical fiber array module 1, which is simple in process and helps to reduce costs.

[0056] In this embodiment, the optical isolator 2 is a non-magnetic optical isolator 2; at the same time, a permanent magnet 3 is provided on at least one side of the optical isolator 2, as shown in Figures 6, 10 and 12, and the optical isolator 2 is at least within the magnetic force range of the adjacent permanent magnet 3, so that the optical isolator 2 can work normally under the magnetic force of the permanent magnet 3.

[0057] In implementation, the permanent magnet 3 can be fixed to the end of the fiber array module 1. For example, the permanent magnet 3 can be preferentially attached to the end of the fiber array module 1 to reduce manufacturing complexity. In implementation, there can be a gap between the optical isolator 2 and the adjacent permanent magnet 3, which not only facilitates the assembly of the optical isolator 2 but also helps to obtain a more stable magnetic field at the optical isolator 2. Of course, it is understandable that in implementation, the permanent magnet 3 can also be placed close to the optical isolator 2 at the end of the fiber array module 1.

[0058] In implementation, the optical isolator 2 is preferably constructed as a block-shaped structure, as shown in Figure 5. In this embodiment, the optical isolator 2 includes a conventional Faraday rotator 23 (non-magnetic) disposed in the middle and a polarizer 21 and an analyzer 24 disposed at both ends of the magnetic element, as shown in Figure 5. In implementation, the analyzer 24 is close to the fiber array module 1, and the polarizer 21 is far away from the fiber array module 1.

[0059] In implementation, the permanent magnet 3 is arranged along the length of the optical isolator 2. For example, the permanent magnet 3 includes S-type and N-type magnets. During assembly, when the S-type magnet of the permanent magnet 3 corresponds to the end of the fiber array module 1, the N-type magnet of the permanent magnet 3 is positioned away from the end of the fiber array module 1, as shown in Figure 7. This allows the magnetic field lines of the permanent magnet 3 to pass through the optical isolator 2 along its length (thickness direction), as shown in Figure 7. This helps to provide a more stable magnetic field for the optical isolator 2 and achieve better optical isolation. Similarly, in implementation, when the N-type magnet of the permanent magnet 3 corresponds to the end of the fiber array module 1, the S-type magnet of the permanent magnet 3 is positioned away from the end of the fiber array module 1, as shown in Figure 8. This also allows the magnetic field lines of the permanent magnet 3 to pass through the optical isolator 2 along its length (thickness direction), which also helps to provide a more stable magnetic field for the optical isolator 2 and achieve better optical isolation.

[0060] In implementation, the number, position, and shape of the permanent magnets 3 can be varied, ensuring that the optical isolator 2 is within the magnetic field range of the permanent magnets 3. For example, in one embodiment, the number of permanent magnets 3 configured in the fiber array assembly can be the same as the number of optical isolators 2, with each permanent magnet 3 positioned on one side (beside) of each optical isolator 2. In this case, the shape and thickness of the permanent magnets 3 only need to be sufficient to generate a sufficient magnetic field strength at the optical isolator 2 to ensure its normal operation; there is no need to restrict the shape and thickness of the permanent magnets 3. However, in the preferred embodiment provided in this example, the thickness of the permanent magnets 3 can preferably be greater than or equal to the thickness of the optical isolator 2 so that the magnetic field of the permanent magnets 3 can better cover the optical isolator 2. As an example, in implementation, the permanent magnets 3 can be constructed as a block-shaped structure, as shown in Figures 6-8, with each permanent magnet 3 positioned on one side of the optical isolator 2; or, as shown in Figure 9, the permanent magnets 3 can be constructed as an arc-shaped structure, with each permanent magnet 3 positioned on one side of the optical isolator 2.

[0061] Of course, in practice, the number of permanent magnets 3 configured in the fiber array assembly can be less than the number of optical isolators 2. For example, each permanent magnet 3 can be set between two adjacent optical isolators 2, so that the same permanent magnet 3 can provide a stable magnetic field for the optical isolators 2 on both sides at the same time, which is beneficial to simplifying the structure.

[0062] To further enhance the magnetic field strength at the optical isolator 2, in a further embodiment, permanent magnets 3 can be disposed on at least two sides of the optical isolator 2. For example, at least two permanent magnets 3 can be disposed outside the sides of the optical isolator 2, as shown in Figure 10, so as to obtain a higher magnetic field strength at the optical isolator 2 and ensure the stable operation of the optical isolator 2. In this case, the permanent magnets 3 can be unconnected to each other, and the number of permanent magnets 3 configured in the fiber array assembly is greater than the number of optical isolators 2. In addition, to facilitate assembly and simplify the process, in a more preferred embodiment, the permanent magnets 3 can be constructed as an L-shaped structure, as shown in Figure 11, with the optical isolator 2 located inside the permanent magnets 3, so that there are permanent magnets 3 on both sides of the optical isolator 2. This not only obtains a higher magnetic field strength at the optical isolator 2 and ensures the stable operation of the optical isolator 2, but also simplifies the process and helps to reduce costs.

[0063] For example, in a further embodiment, the permanent magnet 3 can also be constructed as a U-shaped structure, as shown in Figure 12, with the optical isolator 2 located inside the permanent magnet 3, so that the optical isolator 2 has permanent magnets 3 on three sides. This not only allows for a higher magnetic field strength at the optical isolator 2, ensuring stable operation of the optical isolator 2, but also simplifies the process and helps reduce costs.

[0064] For example, in a further embodiment, the permanent magnet 3 can also be constructed as a U-shaped structure, as shown in Figure 13. The optical isolator 2 is located inside the permanent magnet 3, so that the optical isolator 2 is surrounded by permanent magnets 3. This not only allows for a higher magnetic field strength at the optical isolator 2, ensuring stable operation of the optical isolator 2, but also simplifies the process and helps reduce costs. In implementation, the permanent magnet 3 can preferably be constructed as a cylindrical or square cylindrical structure, as shown in Figure 13. In this embodiment, the permanent magnet 3 is constructed as a square cylindrical structure.

[0065] Example 2

[0066] To address the issue of simplifying the process and reducing costs while maintaining the magnetic field strength at the optical isolator 2, the main difference between this embodiment 2 and the aforementioned embodiment 1 is that in the fiber optic array assembly provided in this embodiment, the permanent magnet 3 in the fiber optic array module 1 is an integral structure. For example, in one embodiment, as shown in Figures 14 and 15, the permanent magnet 3 includes a strip-shaped magnetic strip 31 and magnetic blocks 32 disposed on one side of the magnetic strip 31 and spaced apart from each other. The entire permanent magnet 3 is an integrally formed component. During assembly, the permanent magnet 3 is attached to the end of the fiber optic array module 1, as shown in Figures 14 and 15. Each optical isolator 2 is located on the same side of the magnetic strip 31, and each optical isolator 2 is separated from each other by the magnetic blocks 32, as shown in Figure 15. This design not only allows the permanent magnet 3 to surround at least two sides of the optical isolator 2, thereby obtaining a higher magnetic field strength at the optical isolator 2, ensuring the stable operation of the optical isolator 2, but also helps to reduce the volume of the permanent magnet 3 while maintaining the magnetic field strength, resulting in a more compact structure for the fiber optic array assembly; moreover, it simplifies the process and helps to reduce costs.

[0067] Example 3

[0068] To address the issues of ensuring the magnetic field strength at optical isolator 2 while simplifying the process and reducing costs, the main difference between this embodiment 3 and the above embodiment 1 is that in the fiber array assembly provided in this embodiment, the permanent magnet 3 in the fiber array module 1 is an integral structure. For example, in one embodiment, as shown in Figures 16 and 17, the permanent magnet 3 includes two parallel strip magnetic strips 31 and a plurality of magnetic blocks 32 disposed between the two magnetic strips 31. The magnetic blocks 32 are arranged at intervals, and the entire permanent magnet 3 is an integrally formed component.

[0069] During assembly, the permanent magnet 3 is attached to the end of the fiber array module 1, as shown in Figures 16 and 17. Each optical isolator 2 is located between two magnetic strips 31, and each optical isolator 2 is separated from each other by magnetic blocks 32, as shown in Figures 16 and 17. This makes the entire permanent magnet 3 a multi-channel integrated permanent magnet 3. This design not only allows the permanent magnet 3 to surround at least three sides of the optical isolator 2, as shown in Figure 17, thereby obtaining a higher magnetic field strength at the optical isolator 2, which can ensure the stable operation of the optical isolator 2, but also helps to reduce the size of the permanent magnet 3 while ensuring the magnetic field strength, which is conducive to a more compact structure of the fiber array assembly; moreover, it can simplify the process and reduce costs.

[0070] Example 4

[0071] To address the issues of ensuring the magnetic field strength at the optical isolator 2 while simplifying the process and reducing costs, the main difference between this embodiment 4 and the above embodiment 1 is that, in the fiber array assembly provided in this embodiment, the permanent magnet 3 in the fiber array module 1 is an integrally formed component. For example, in one embodiment, as shown in Figures 18 and 19, the permanent magnet 3 is constructed as a plate-like structure, and the permanent magnet 3 has multiple through holes 33. The number of through holes 33 is adapted to the number of optical isolators 2, and the size of the through holes 33 is greater than or equal to the size of the optical isolator 2, so that the entire permanent magnet 3 constitutes a multi-channel integral permanent magnet 3. During assembly, the permanent magnet 3 is attached to the end of the fiber array module 1, as shown in Figure 18. Each optical isolator 2 is located in each through hole 33, as shown in Figure 19. This design not only allows the permanent magnet 3 to surround the optical isolator 2, as shown in Figure 19, thereby obtaining a higher magnetic field strength at the optical isolator 2, which can ensure the stable operation of the optical isolator 2, but also helps to reduce the size of the permanent magnet 3 while ensuring the magnetic field strength, which is conducive to a more compact structure of the fiber array assembly; moreover, it can simplify the process and help reduce costs.

[0072] Example 5

[0073] This embodiment provides an optical module, including the fiber array assembly described in embodiment 1, embodiment 2, embodiment 3, or embodiment 4.

[0074] In a more refined embodiment, the optical module further includes a housing with an assembly space within which the fiber array assembly is disposed. In practice, the housing may include a base and a top plate, with the top plate detachably mounted on the base, forming the assembly space between the top plate and the base.

[0075] In a more complete implementation, the optical module also includes an optical fiber interface, which can be located at one end of the housing. The optical fiber array assembly is connected to the optical fiber interface via an optical fiber so as to transmit optical signals to the outside through the optical fiber interface.

[0076] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A fiber optic array assembly utilizing an external permanent magnet, characterized in that, It includes an optical fiber array module and an optical isolator. The optical fiber array module includes a first clamping part, a second clamping part, and at least two optical fibers clamped between the first clamping part and the second clamping part, and each optical fiber is arranged in an array. Each optical isolator is disposed at the end of the fiber array module and corresponds to each fiber. The optical isolators are non-magnetic optical isolators. The optical isolator has a permanent magnet on at least one side, and the optical isolator is at least within the magnetic force range of the adjacent permanent magnet. The optical isolator is used to operate under the magnetic force of the permanent magnet.

2. The fiber optic array assembly utilizing an external permanent magnet according to claim 1, characterized in that, The permanent magnet is fixed to the end of the fiber optic array module.

3. The fiber optic array assembly utilizing an external permanent magnet according to claim 2, characterized in that, The optical isolator is attached to the end of the fiber optic array module; the permanent magnet is attached to the end of the fiber optic array module.

4. The fiber optic array assembly utilizing an external permanent magnet according to claim 1, characterized in that, There is a gap between the optical isolator and the adjacent permanent magnet.

5. The fiber optic array assembly utilizing an external permanent magnet according to claim 1, characterized in that, The optical isolator includes a non-magnetic Faraday rotator, a polarizer, and an analyzer, with the polarizer and analyzer respectively disposed at both ends of the Faraday rotator.

6. The fiber optic array assembly utilizing an external permanent magnet according to claim 1, characterized in that, The optical isolator has a block-shaped structure.

7. The fiber optic array assembly utilizing an external permanent magnet according to claim 1, characterized in that, The permanent magnet includes S-class and N-class. The S-class of the permanent magnet corresponds to the end of the fiber array module, and the N-class of the permanent magnet is away from the end of the fiber array module. Alternatively, the N-level of the permanent magnet corresponds to the end of the fiber array module, and the S-level of the permanent magnet is away from the end of the fiber array module.

8. The fiber optic array assembly utilizing an external permanent magnet according to claim 1, characterized in that, The thickness of the permanent magnet is greater than or equal to the thickness of the optical isolator.

9. The fiber optic array assembly utilizing an external permanent magnet according to any one of claims 1-8, characterized in that, The permanent magnet has a block-shaped or arc-shaped structure.

10. The fiber optic array assembly utilizing an external permanent magnet according to any one of claims 1-8, characterized in that, Each permanent magnet is positioned between two adjacent optical isolators.

11. The fiber optic array assembly utilizing an external permanent magnet according to any one of claims 1-8, characterized in that, The optical isolator has permanent magnets on at least two sides.

12. The fiber optic array assembly utilizing an external permanent magnet according to claim 11, characterized in that, The permanent magnet has an L-shaped structure, and the optical isolator is located inside the permanent magnet.

13. The fiber optic array assembly utilizing an external permanent magnet according to claim 11, characterized in that, The permanent magnet has a U-shaped structure, and the optical isolator is located inside the permanent magnet.

14. The fiber optic array assembly utilizing an external permanent magnet according to claim 11, characterized in that, The permanent magnet has a U-shaped structure, and the optical isolator is located inside the permanent magnet.

15. The fiber optic array assembly utilizing an external permanent magnet according to claim 14, characterized in that, The permanent magnet has a cylindrical or square structure.

16. The fiber optic array assembly utilizing an external permanent magnet according to any one of claims 1-8, characterized in that, The permanent magnet located at the front end of the fiber array module is an integrally formed component. The permanent magnet includes a magnetic strip and magnetic blocks disposed on one side of the magnetic strip and spaced apart from each other. Each optical isolator is located on the same side of the magnetic strip and is separated from each other by the magnetic blocks.

17. The fiber optic array assembly utilizing an external permanent magnet according to any one of claims 1-8, characterized in that, The permanent magnet located at the front end of the fiber array module is an integrally formed component. The permanent magnet includes two parallel magnetic strips and multiple magnetic blocks disposed between the two magnetic strips. The magnetic blocks are arranged at intervals. Each optical isolator is located between the two magnetic strips and is separated from each other by the magnetic blocks.

18. The fiber optic array assembly utilizing an external permanent magnet according to any one of claims 1-8, characterized in that, The permanent magnet located at the front end of the fiber array module is an integrally formed component. The permanent magnet has a plate-like structure with multiple through holes. The permanent magnet is fixed to the end of the fiber array module, and each optical isolator is located in each through hole.

19. An optical module, characterized in that, Includes the fiber optic array assembly as described in any one of claims 1-18.

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