Processing method of free space isolator

Abstract

The invention relates to the technical field of optical device processing, in particular to a processing method of a free space isolator. The processing method comprises the following steps: providing a substrate and a magnetic plate; bonding and fixing the substrate and the magnetic plate through glue to form a base structure; the edge of the base structure is machined to be flush; the base structure is machined into a plurality of bases, each base comprises a substrate and a magnetic block fixedly attached to the substrate, and at least one channel is formed in each magnetic block through machining; at least one isolator core is installed on each channel of the base, and each base and the corresponding isolator core are assembled to form a free space isolator. According to the processing method, processing is carried out on the whole base structure, the base plate serves as the substrate, the magnetic block is not prone to being broken or fractured when the magnetic block is processed or used, the process problem that the base of a single free space isolator and the magnetic block are staggered or glue overflows does not exist, and the processing process difficulty is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of optical device processing, in particular to a processing method of a free space isolator. Background Art

[0002] Free space isolator is an optical passive device widely used in optical communication and laser fields. Its function is to ensure the unidirectional transmission of optical signals and prevent reflected light from interfering with the system.

[0003] Free space isolators can be mainly divided into circular free space isolators and surface mount free space isolators according to the assembly method. Surface mount free space isolators are widely used because they are easy to process into multi-channel arrays such as 2-channel, 3-channel, 4-channel, 8-channel, etc.

[0004] Due to the limitation of product installation space, the surface mount free space isolator product size is required to be as small as possible, and the magnetic blocks used are required to be small and thin. However, thin magnetic blocks are prone to breakage or fracture during processing or use. In addition, in some special application scenarios, the bottom surface of the magnetic block is required to be bonded to the substrate to achieve insulation with the bonded substrate (i.e. the substrate of the applied product), better adhesion, expansion coefficient matching, etc. However, when assembling a single free space isolator, when the magnetic block and the substrate are bonded with glue, the magnetic block and the substrate are prone to misalignment or glue overflow, making it difficult to control the quality of the free space isolator and the processing technology is difficult. Summary of the invention

[0005] The technical problem to be solved by the embodiments of the present invention is to provide a processing method for a free space isolator to solve the problems in the prior art that the magnetic block is easy to break during the processing of a single free space isolator, the magnetic block and the substrate are easy to misalign or glue overflows, and the processing technology is difficult.

[0006] The present invention discloses a method for processing a free space isolator, and the method for processing the free space isolator comprises:

[0007] providing a substrate and a magnetic plate;

[0008] The substrate and the magnetic plate are bonded and fixed by glue to form a base structure;

[0009] Processing the edge of the base structure to be flush;

[0010] Processing the base structure into a plurality of bases, each of the bases comprising a substrate and a magnetic block attached and fixed to the substrate, wherein at least one channel is formed on the magnetic block;

[0011] At least one isolator core is installed on each channel of the base, and each of the bases is assembled with the corresponding isolator core to form a free space isolator.

[0012] Optionally, the shapes of the bases are the same or different.

[0013] Optionally, the step of bonding and fixing the substrate and the magnetic plate by glue to form a base structure includes:

[0014] Apply glue on one end surface of the substrate, and laminate the magnetic plate onto the glue-applied end surface of the substrate;

[0015] applying pressure to the magnetic plate toward the substrate;

[0016] placing the substrate and the magnetic plate in a vacuum environment for evacuation;

[0017] The glue between the substrate and the magnetic plate is cured to form a base structure.

[0018] Optionally, the step of dispensing glue on one end surface of the substrate includes:

[0019] Glue is dispensed at a plurality of positions on one end surface of the substrate, and glue is dispensed at each position to form a long strip of glue layer.

[0020] Optionally, the glue between the substrate and the magnetic plate is cured by heating.

[0021] Optionally, the step of processing the base structure into a plurality of bases comprises:

[0022] A plurality of grooves are processed on an end surface of the magnetic plate of the base structure facing away from the substrate, wherein the plurality of grooves are arranged along a first direction;

[0023] The base structure is cut along a first direction and a second direction to be cut into a plurality of bases, and the same groove is cut into a plurality of identical channels, wherein the first direction and the second direction are arranged perpendicular to each other.

[0024] Optionally, the shapes of the plurality of grooves are the same or different.

[0025] Optionally, the step of installing an isolator core on each channel of the base comprises:

[0026] Dispensing glue on the bottom end surface of each channel of the base;

[0027] Adhere at least one isolator core to the glue-dispensed bottom end surface of the channel;

[0028] The glue between the isolator core and the bottom end surface of the channel is cured.

[0029] Optionally, the glue between the separator core and the bottom end surface of the channel is cured by heating.

[0030] Optionally, the substrate is made of ceramic, glass, silicon aluminum oxide or aluminum nitride, and / or the magnetic plate is made of samarium cobalt, neodymium iron boron or aluminum nickel cobalt magnet.

[0031] Compared with the prior art, the processing method of the free space isolator provided by the embodiment of the present invention has the beneficial effect of: firstly, the substrate and the magnetic plate are bonded and fixed by glue to form a whole, forming a base structure, and then the edge of the base structure is processed to be flush, and the flush base structure is processed into multiple bases, each of which includes a base and a magnetic block fixed to the base. Since there is a substrate as a backing, the magnetic block is not easy to break or fracture when processing or using the magnetic block. Furthermore, by installing an isolator core on the channel of the magnetic block, each base can be assembled with the corresponding isolator core to form a free space isolator. Since the base of each free space isolator is processed based on the base structure formed after the substrate and the magnetic plate are fixed, there is no process problem of misalignment between the base and the magnetic block of a single free space isolator or glue overflow, thereby reducing the difficulty of the processing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0033] Figure 1 is a schematic flow chart of a method for processing a free space isolator provided in an embodiment of the present invention;

[0034] Figure 2 It is a schematic diagram of a process of processing a substrate and a magnetic plate to form a base structure provided by an embodiment of the present invention;

[0035] Figure 3 It is a schematic diagram of a process of processing a base structure into multiple bases provided by an embodiment of the present invention;

[0036] Figure 4 It is a schematic diagram of a process of installing an isolator core on a base provided by an embodiment of the present invention;

[0037] Figure 5 is a schematic structural diagram of a substrate and a magnetic plate before bonding provided by an embodiment of the present invention;

[0038] Figure 6 It is a structural schematic diagram of a base structure formed by bonding and fixing a substrate and a magnetic plate provided in an embodiment of the present invention;

[0039] Figure 7It is a schematic diagram of a structure in which a base structure part is processed to form a plurality of bases according to an embodiment of the present invention;

[0040] Figure 8 is a structural schematic diagram of a base provided by an embodiment of the present invention;

[0041] Fig. 9 yes Figure 8 Schematic diagram of the structure of the isolator core installed on the base shown.

[0042] The reference numerals in the figures are:

[0043] 110, substrate; 120, magnetic plate; 130, base structure; 130a, groove; 131, base; 1311, substrate; 1312, magnetic block; 1312a, channel; 140, isolator core. DETAILED DESCRIPTION

[0044] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, the preferred embodiments of the present invention are described in detail.

[0045] The embodiment of the present invention provides a method for processing a free space isolator, such as Figure 1 , Figures 5 to 9 As shown, the processing methods of free space isolators include:

[0046] S101, providing a substrate 110 and a magnetic plate 120;

[0047] S102, bonding and fixing the substrate 110 and the magnetic plate 120 by glue to form a base structure 130;

[0048] S103, processing the edge of the base structure 130 to be flush;

[0049] S104, processing the base structure 130 into a plurality of bases 131, each base 131 comprising a base 1311 and a magnetic block 1312 attached and fixed to the base 1311, and at least one channel 1312a is formed on the magnetic block 1312;

[0050] S105 , at least one isolator core 140 is installed on each channel 1312 a of the base 131 , and each base 131 is assembled with the corresponding isolator core 140 to form a free space isolator.

[0051] In the embodiment of the present invention, the substrate 110 and the magnetic plate 120 are first fixed by gluing to form a whole, forming a base structure 130, and then the edge of the base structure 130 is processed to be flush, and the processed flush base structure 130 is processed into a plurality of bases 131, each of which includes a base 1311 and a magnetic block 1312 fixed to the base 1311. Since the substrate 110 is used as a substrate, the magnetic block 1312 is not easy to be broken or fractured when processing or using the magnetic block 1312. In a step, by installing the isolator core 140 on the channel 1312a of the magnetic block 1312, each base 131 can be assembled with the corresponding isolator core 140 to form a free space isolator. Since the base 131 of each free space isolator is processed as a whole based on the base structure 130 formed by fixing the substrate 110 and the magnetic plate 120, there is no process problem of misalignment between the base 1311 and the magnetic block 1312 of a single free space isolator or glue overflow, thereby reducing the difficulty of the processing technology.

[0052] The channel on the magnetic block 1312 is an installation channel in which the isolator core 140 can be placed and installed, and its specific shape is not limited.

[0053] After the substrate 110 and the magnetic plate 120 are fixed by glue, there is a little misalignment and glue overflow between the substrate 110 and the magnetic plate 120. The edge of the base structure 130 can be processed to be flush by scraping the edge to remove the overflowed glue and misalignment. Scraping is a common processing method. Scraping refers to using a scraper or similar tool to scrape away excess material or uneven surface such as glue and misaligned protruding material along the edge of the base structure 130 to make the edge smooth.

[0054] Processing the edge of the base structure 130 to be flush can ensure that the edge of each base 131 after subsequent processing and cutting is smooth, without the need for additional edge scraping of a single base 131, thereby reducing the difficulty of the processing technology.

[0055] The shapes of the multiple bases 131 are the same or different. When the shapes of the multiple bases 131 are the same, for example, the shapes of the bases and magnetic blocks of the multiple bases are the same, and the number of channels set on the magnetic blocks is the same, they can be further assembled into multiple identical free space isolators. When the shapes of the multiple bases 131 are different, they can be further assembled into multiple different free space isolators, such as free space isolators with different numbers of channels 1312a.

[0056] In an optional embodiment of the present application, the material of the substrate 110 is ceramic, glass, silicon aluminum oxide or aluminum nitride. Exemplarily, the material of the substrate 110 is ceramic, and the ceramic material generally has excellent thermal stability and can maintain stable performance in a high temperature environment; it has high hardness and excellent mechanical properties and can withstand certain pressure and impact. The assembled free space isolator has high durability and stability, and ceramics generally have a low thermal expansion coefficient and high dimensional stability, which can maintain the stability of the device under temperature changes.

[0057] In an optional embodiment of the present application, the material of the magnetic plate 120 is samarium cobalt, neodymium iron boron or aluminum nickel cobalt magnet. Exemplarily, the material of the magnetic plate 120 is samarium cobalt, which has excellent magnetic properties, high magnetization intensity and magnetic saturation induction intensity, can provide a strong magnetic field, and is conducive to achieving a good optical isolation effect; has low hysteresis loss, can reduce energy loss, and improve the efficiency of the processed free space isolator; has high magnetic stability, can maintain stable magnetic properties in a wide temperature range, and helps to maintain the stable performance of the free space isolator.

[0058] In an optional embodiment of the present application, refer to Figure 2 The step of bonding the substrate 110 and the magnetic plate 120 by glue to form the base structure 130 includes:

[0059] S201, applying glue on one end surface of the substrate 110, and laminating the magnetic plate 120 on the glue-applied end surface of the substrate 110;

[0060] S202, applying pressure to the magnetic plate 120 toward the substrate 110;

[0061] S203, placing the substrate 110 and the magnetic plate 120 in a vacuum environment for evacuation;

[0062] S204 , curing the glue between the substrate 110 and the magnetic plate 120 to form a base structure 130 .

[0063] By laminating the magnetic plate 120 on the glued end surface of the substrate 110, the fitting area between the substrate 110 and the magnetic plate 120 can be increased, and the base structure 130 with a larger area can be processed so that the base structure 130 can be processed and assembled into more free space isolators. After the magnetic plate 120 is attached to the glued end surface of the substrate 110, by applying pressure to the magnetic plate 120 toward the substrate 110, the glue between the substrate 110 and the magnetic plate 120 can be spread horizontally and evenly arranged between the substrate 110 and the magnetic plate 120. Placing the substrate 110 and the magnetic plate 120 in a vacuum environment for vacuuming can discharge bubbles in the glue, increase the density of the glue between the substrate 110 and the magnetic plate 120, and increase the bonding force between the substrate 110 and the magnetic plate 120. After the glue is cured, the substrate 110 and the magnetic plate 120 are bonded and fixed to form a whole, forming a base structure 130 , which is then processed and assembled to form a plurality of free space isolators.

[0064] Optionally, a heavy object is placed above the magnetic plate 120 , and due to gravity, the magnetic plate 120 is subjected to pressure toward the substrate 110 , so that the magnetic plate 120 and the substrate 110 are closely attached.

[0065] In an optional embodiment of the present application, the step of dispensing glue on one end surface of the substrate 110 includes:

[0066] Glue is dispensed at multiple locations on one end surface of the substrate 110 , and glue is dispensed at each location to form a long strip of glue layer.

[0067] By applying glue at multiple locations on one end surface of the substrate 110 and applying the glue to form a long strip-shaped glue layer, the coverage area of ​​the glue on the substrate 110 can be increased. When the magnetic plate 120 is pressed against the substrate 110, the glue can be squeezed and spread out to form a whole, thereby increasing the coverage area of ​​the glue between the substrate 110 and the magnetic plate 120 and increasing the bonding force between the two.

[0068] Optionally, the glue between the substrate 110 and the magnetic plate 120 is cured by heating. Heating can promote the curing process of the glue, so that it reaches the required strength in a shorter time, which can save time and improve production efficiency. It can also change the viscosity of the glue, promote the flow and penetration of the glue, and improve the bonding effect of the glue. The substrate 110 and the magnetic plate 120 are fixed by glue to form the effect diagram of the base structure 130 as shown in the figure below. Figure 6 shown.

[0069] In an optional embodiment of the present application, reference Figure 3 The step of processing the base structure 130 into a plurality of bases 131 includes:

[0070] S301, processing a plurality of grooves 130a on an end surface of the magnetic plate 120 of the base structure 130 facing away from the substrate 110, wherein the plurality of grooves 130a are all arranged along a first direction;

[0071] S302, cutting the base structure 130 along the second direction to cut the base structure 130 into a plurality of bases 131, and cutting the same groove 130a into a plurality of identical channels 1312a, wherein the first direction and the second direction are arranged perpendicular to each other.

[0072] The grooves 130a are uniformly processed on the magnetic plate 120 of the base structure 130, and then the base structure 130 is cut along the first direction and the second direction to be cut into a plurality of bases 131. The effect diagram is as shown in FIG. Figure 7 The effect diagram of the base 131 with four channels 1312a is shown as follows Figure 8 As shown. Since the grooves 130a are uniformly processed on the magnetic plate 120, with the substrate 110 as the substrate, the magnetic block 1312 is not easily broken or fractured during the processing. And since the base 131 of each free space isolator is cut and formed on the basis of the base structure 130, there is no process problem of misalignment between the base 1311 and the magnetic block 1312 of a single free space isolator or glue overflow, which reduces the difficulty of the processing technology. Among them, the first direction is as follows Figure 7 The X-axis direction is shown, and the second direction is as Figure 7 The Y-axis direction is shown.

[0073] A plurality of grooves 130a are processed on one end face of the magnetic plate 120 of the base structure 130 that faces away from the substrate 110. This can be performed by mechanical processing methods such as wire cutting, grinding, and milling. The entire base structure 130 is used as the basis for processing the grooves 130a. Compared with processing a channel 1312a for placing the isolator core 140 on a single magnetic block 1312, the processing operation is easier to control and the difficulty of the processing technology is reduced.

[0074] Furthermore, the shapes of the plurality of grooves 130a are the same or different. Grooves 130a of different shapes can be processed on the substrate 110, so as to process bases 131 of different sizes and shapes, and free space isolators of different sizes and shapes can be processed and assembled, such as free space optical isolators of single-channel 1312a, dual-channel 1312a, triple-channel 1312a, etc., or free space optical isolators of single-stage, dual-stage, triple-stage or triple-stage, which have high applicability.

[0075] When processing the groove 130a on the magnetic plate 120, grooves 130a of different shapes and the number of grooves 130a of the same shape can be processed according to the required free space isolator. In the process of cutting the base structure 130 along the first direction and the second direction, the base 131 of the required free space isolator can be cut at different positions of the base structure 130, so that the base 131 of the same or different shapes can be obtained, and then the free space isolators of the same or different shapes can be assembled. When installing the isolator core 140, one or more isolator cores 140 can be installed on the same channel 1312a according to the requirements of the optical isolation level to assemble free space isolators with different optical isolation levels.

[0076] In an optional embodiment of the present application, refer to Figure 4 The step of installing the isolator core 140 on each channel 1312a of the base 131 includes:

[0077] S401, dispensing glue on the bottom end surface of each channel 1312a of the base 131;

[0078] S402, attaching the isolator core 140 to the glued bottom end surface of the channel 1312a;

[0079] S403, curing the glue between the isolator core 140 and the bottom end surface of the channel 1312a.

[0080] By gluing the isolator core 140 to the bottom end face of the channel 1312a of the base 131 with glue, good structural stability can be provided to ensure that the isolator core 140 will not loosen or shift during use, which helps to maintain the stability and performance of the free space isolator. The method of fixing the isolator core 140 with glue is also simpler and relatively easy to operate. Only an appropriate amount of glue and simple fixing steps are required to complete the fixing process, and the cost is low. Taking the base 131 with four channels 1312a as an example, the effect of the free space isolator after installing the isolator core 140 is shown in the figure below. Fig. 9 shown.

[0081] Optionally, the glue between the separator core 140 and the bottom end surface of the channel 1312a is cured by heating. Heating can promote the curing process of the glue, so that it reaches the required strength in a shorter time, which can save time and improve production efficiency. It can also change the viscosity of the glue, promote the flow and penetration of the glue, and improve the bonding effect of the glue.

[0082] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A method for processing a free space isolator, characterized in that: The processing method of the free space isolator comprises: providing a substrate and a magnetic plate; The substrate and the magnetic plate are bonded and fixed by glue to form a base structure; Processing the edge of the base structure to be flush; Processing the base structure into a plurality of bases, each of the bases comprising a substrate and a magnetic block attached and fixed to the substrate, wherein at least one channel is formed on the magnetic block; At least one isolator core is installed on each channel of the base, and each of the bases is assembled with the corresponding isolator core to form a free space isolator.

2. The method for processing a free space isolator according to claim 1, characterized in that: The shapes of the plurality of bases are the same or different.

3. The method for processing a free space isolator according to claim 2, characterized in that: The step of bonding and fixing the substrate and the magnetic plate by glue to form a base structure includes: Apply glue on one end surface of the substrate, and laminate the magnetic plate onto the glue-applied end surface of the substrate; applying pressure to the magnetic plate toward the substrate; placing the substrate and the magnetic plate in a vacuum environment for evacuation; The glue between the substrate and the magnetic plate is cured to form a base structure.

4. The method for processing a free space isolator according to claim 3, characterized in that: The step of dispensing glue on one end surface of the substrate comprises: Glue is dispensed at a plurality of positions on one end surface of the substrate, and glue is dispensed at each position to form a long strip-shaped glue layer.

5. The method for processing a free space isolator according to claim 4, characterized in that: The glue between the substrate and the magnetic plate is cured by heating.

6. The method for processing a free space isolator according to claim 1, characterized in that: The step of processing the base structure into a plurality of bases comprises: A plurality of grooves are processed on an end surface of the magnetic plate of the base structure facing away from the substrate, wherein the plurality of grooves are arranged along a first direction; The base structure is cut along a first direction and a second direction to be cut into a plurality of bases, and the same groove is cut into a plurality of identical channels, wherein the first direction and the second direction are arranged perpendicular to each other.

7. The method for processing a free space isolator according to claim 6, characterized in that: The shapes of the plurality of grooves are the same or different.

8. The method for processing a free space isolator according to claim 1, characterized in that: The step of installing an isolator core on each channel of the base comprises: Dispensing glue on the bottom end surface of each channel of the base; Laying at least one isolator core onto the glue-dispensed bottom end surface of the channel; The glue between the isolator core and the bottom end surface of the channel is cured.

9. The method for processing a free space isolator according to claim 8, characterized in that: The glue between the separator core and the bottom end surface of the channel is cured by heating.

10. The method for processing a free space isolator according to any one of claims 1 to 8, characterized in that: The substrate is made of ceramic, glass, silicon aluminum oxide or aluminum nitride, and / or the magnetic plate is made of samarium cobalt, neodymium iron boron or aluminum nickel cobalt magnet.

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