MT insertion core and joint

Abstract

The MT insertion core comprises an insertion core main body and an optical fiber, the end face of the insertion core main body is provided with an optical fiber arrangement hole, the optical fiber arrangement hole penetrates through the insertion core main body to one side face corresponding to the end face of the insertion core main body, and the optical fiber is fixed on the insertion core main body through the optical fiber arrangement hole. And the other surfaces of the ferrule main body are provided with outer surface coatings. According to the MT insertion core provided by the utility model, the outer surface coating is arranged on the surface of the insertion core main body, so that the purpose of resisting short-term high temperature can be realized, the production process of the MT insertion core main body does not need to be changed, and batch production is facilitated; and the outer surface coating can greatly reduce the shrinkage deformation quantity of the MT ferrule, so that the loss variation of the MT ferrule is reduced, and the MT ferrule can bear a short-term high-temperature environment.

Description

Technical Field

[0001] The utility model relates to the technical field of ferrules, in particular to an MT ferrule and a connector. Background Art

[0002] MT ferrules are the first generation of spring clamp multi-core connectors developed by NTT in Japan in 1980. With the development of optical fiber networks and data centers, MT ferrules are currently widely used in connectors and cables in data centers, as well as in the interior of high-speed optical modules.

[0003] The main raw materials of MT ferrules produced by mainstream manufacturers are a blend of PPS (polyphenylene sulfide) and SiO2 (silicon dioxide) microspheres. Since its main material is PPS plastic, its temperature resistance is generally within the range of -40℃ to 85℃, and the short-term working temperature cannot exceed 120℃. When the operating temperature exceeds 120℃, the MT ferrule will shrink and deform, causing changes in the end face of the connector, resulting in a significant decrease in the accuracy of optical fiber docking and an increase in insertion loss, which ultimately makes the products made by it unusable.

[0004] In the current mature production process of silicon photonic modules, the MT ferrule needs to have a small insertion loss after the reflow process, so there is a demand for the MT ferrule to withstand short-term high temperatures. In the prior art, CN209215633U relies on filling the MT ferrule with high-temperature resistant glue to increase the internal strength of the ferrule as a whole, but this method still cannot avoid the problem that the ferrule main body material cannot maintain structural strength at high temperatures. Utility Model Content

[0005] The purpose of the utility model is to solve the above technical problems and provide an MT ferrule and a connector.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An MT ferrule comprises a ferrule body and an optical fiber, wherein the end face of the ferrule body is provided with an optical fiber arrangement hole, the optical fiber arrangement hole penetrates the ferrule body to a side surface corresponding to the end face of the ferrule body, the optical fiber is fixed to the ferrule body through the optical fiber arrangement hole, and the remaining surface of the ferrule body is provided with an outer surface coating.

[0008] In some embodiments of the present invention, the outer surface coating includes at least one layer of a thermal conductive coating and / or a thermal insulation coating.

[0009] In some embodiments of the present invention, the outer surface coating further includes a bonding coating, and the bonding coating is located between the core body and other outer surface coatings, and / or the bonding coating is located between other outer surface coatings.

[0010] In some embodiments of the present invention, the outermost layer of the outer surface coating further includes a protective coating.

[0011] In some embodiments of the present invention, a side surface corresponding to the end surface of the ferrule body is provided with a tail sheath, and the optical fiber passes through the tail sheath into the optical fiber arrangement hole.

[0012] In some embodiments of the present invention, the material of the insert body is a mixture of polyphenylene sulfide plastic and silicon dioxide microspheres.

[0013] In some embodiments of the present invention, the material of the thermal conductive coating is at least one of titanium or chromium, and the thickness of each layer of the thermal conductive coating is 80 to 200 microns; the material of the thermal insulation coating is at least one of titanium dioxide, cerium dioxide or tantalum pentoxide, and the thickness of each layer of the thermal insulation coating is 80 to 200 microns.

[0014] In some embodiments of the present invention, the material of the bonding coating is at least one of tantalum pentoxide, magnesium difluoride or silicon dioxide, and the thickness of each layer of the bonding coating is 30 to 80 microns; the material of the protective coating is at least one of silicon dioxide, magnesium difluoride or aluminum oxide, and the thickness of each layer of the protective coating is 30 to 80 microns.

[0015] In some embodiments of the present invention, the thickness of the outer surface coating is at least 30 microns.

[0016] The utility model also provides a connector, comprising the MT ferrule as described in any one of the above items.

[0017] The utility model has the following beneficial effects:

[0018] The MT ferrule proposed by the utility model can achieve the purpose of short-term high temperature resistance by arranging an outer surface coating on the surface of the ferrule body, without changing the production process of the MT ferrule body, and is convenient for mass production; the outer surface coating can greatly reduce the shrinkage deformation of the MT ferrule, thereby reducing its loss change, so that it can withstand a short-term high temperature environment.

[0019] In addition, in some embodiments, the following beneficial effects are also achieved:

[0020] Both the thermal conductive coating and the thermal insulation coating have good toughness, hardness, and thermal conductivity; the bonding coating can increase the bonding force between the outer surface coating and the MT core main body material and other outer surface coatings, so that the outer surface coating as a whole is tightly bonded to the MT core main body material; the protective coating is arranged on the outermost layer of the outer surface coating, and has good toughness and hardness, providing mechanical protection for the outer surface coating. When the core is in a short-term high temperature environment, because the outer surface coating has good toughness and hardness, and the deformation amount is small with the temperature increase, and it is tightly bonded with the internal MT core main body or because of the bonding coating between them, it is tightly bonded, thereby supporting the structure of the MT core main body, thereby reducing the shrinkage deformation amount of the MT core main body; and because the material of the thermal conductive coating has good thermal conductivity, the MT core inside the coating maintains the uniformity of the internal temperature in a short-term high temperature environment, so as not to produce large local deformation; or because the thermal insulation coating has good thermal insulation, the MT core inside the coating undergoes a small temperature change in a short-term high temperature environment, so as not to produce large local deformation.

[0021] Other beneficial effects of the embodiments of the present invention will be further described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the MT ferrule in the embodiment of the utility model;

[0023] Figure 2 This is an exploded view of the MT ferrule in the embodiment of the utility model;

[0024] Figure 3 It is a line graph of the average change in fiber height in the experimental case;

[0025] Figure 4 It is a line graph of the insertion loss variation in the experimental example;

[0026] The reference numerals are as follows:

[0027] Ferrule body 1, optical fiber 2, tail sheath 3, outer surface coating 4, optical fiber arrangement hole 5, guide pin positioning hole 6. DETAILED DESCRIPTION

[0028] The present invention is further described below with reference to the accompanying drawings and in combination with preferred embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0029] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, connection can be used for fixing as well as for coupling or communication.

[0030] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] The following embodiment of the present invention provides an MT ferrule that can withstand short-term high temperatures. The short-term in the present invention is about 10 minutes, and the high temperature refers to a temperature exceeding 120 degrees Celsius.

[0032] The present invention provides an MT ferrule according to an embodiment of the present invention. Figure 1 and Figure 2 , including a core body and an optical fiber 2, the end face of the core body 1 is provided with an optical fiber arrangement hole 5, the optical fiber arrangement hole 5 penetrates the core body 1 to a side surface corresponding to the end face of the core body 1, the optical fiber 2 is fixed to the core body through the optical fiber arrangement hole 5, and the remaining surface of the core body is provided with an outer surface coating 4.

[0033] In a preferred embodiment, the outer surface coating 4 includes at least one layer of a thermal conductive coating and / or a thermal insulation coating.

[0034] In a preferred embodiment, the outer surface coating 4 further includes a bonding coating, and the bonding coating is located between the ferrule body 1 and other outer surface coatings 4 , and / or the bonding coating is located between other outer surface coatings 4 .

[0035] In a preferred embodiment, the outermost layer of the outer surface coating 4 also includes a protective coating.

[0036] In a preferred embodiment, a side surface corresponding to the end surface of the ferrule body is provided with a tail sheath 3 , and the optical fiber 2 passes through the tail sheath 3 and enters the optical fiber arrangement hole 5 .

[0037] In a preferred embodiment, the material of the insert body is a mixture of polyphenylene sulfide plastic and silica microspheres.

[0038] In a preferred embodiment, the material of the thermal conductive coating is at least one of titanium or chromium, and the thickness of each layer of the thermal conductive coating is 200 microns; the material of the thermal insulation coating is at least one of titanium dioxide, cerium dioxide or tantalum pentoxide, and the thickness of each layer of the thermal insulation coating is 80 to 200 microns.

[0039] In a preferred embodiment, the material of the bonding coating is at least one of tantalum pentoxide or silicon dioxide, and the thickness of each layer of the bonding coating is 30 to 80 microns; the material of the protective coating is at least one of silicon dioxide, magnesium difluoride or aluminum oxide, and the thickness of each layer of the protective coating is 30 to 80 microns.

[0040] In a preferred embodiment, the outer surface coating 4 covers the end face and a side surface corresponding to the end face, and the thickness of the outer surface coating 4 is at least 30 microns.

[0041] The utility model also provides a connector, comprising the MT ferrule as described in any one of the above items.

[0042] The MT ferrule proposed in the utility model, and the method for making the outer surface coating 4 thereon, comprises the following steps: in the vacuum chamber of the magnetron sputtering equipment, the ferrule body is mounted on a rotating fixture, and then under specific environmental conditions (such as filling with inert gas), a high-energy electron pulse is used to bombard the target gun, so that the material on it is converted into an ion state and evenly attached to the ferrule body to form an outer surface coating 4. During magnetron sputtering, the rotating fixture drives the ferrule body to rotate at a uniform speed, so that the surface of the ferrule body is always perpendicular to the target gun, so that an outer surface coating 4 with uniform thickness is formed on each surface of the ferrule body. The thickness of the coating is controlled by controlling the duration of magnetron sputtering, and appropriate adjustments are made according to the maximum temperature and duration that need to be tolerated. When the outer surface coating 4 contains components with different functions, the target gun can be replaced after each single layer of coating is completed, and then the above-mentioned production method is repeated to form a new layer of coating on the ferrule body. The above is a description of the production implementation method of the outer surface coating 4 of the MT ferrule that is resistant to short-term high temperature, taking the magnetron sputtering method as an example. The purpose of the utility model described above can also be achieved by using electron beam evaporation coating methods, chemical coating, electrochemical coating, plasma sputtering coating, spray coating and the like; the purpose of the utility model described above can also be achieved by using a combination of the above different methods to produce a multilayer coating.

[0043] Example 1

[0044] The short-term high-temperature resistant MT ferrule proposed in the utility model comprises a ferrule body 1 and an outer surface coating 4; the ferrule body is made of a blend of PPS plastic and SiO2 microspheres; the ferrule body is in the shape of a rectangular parallelepiped, comprising a plurality of optical fiber arrangement holes penetrating the ferrule body, and a plurality of guide pin positioning holes 6 for docking and positioning with the outside; the outer surface coating 4 is located on multiple or all outer surfaces of the ferrule, at least covering the upper, lower, left and right surfaces thereof.

[0045] The outer surface coating 4 may include a single coating, or a combination of multiple single-layer coatings with the same or different functions. The functions of the single-layer coating include: thermal conductive coating, thermal insulation coating, bonding coating, and protective coating. The outer surface coating 4 has good bonding with the material of the core body, and has good toughness and hardness, and the outer surface coating 4 has a small deformation amount with temperature changes. The number of layers, thickness and material of the outer surface coating 4 can be appropriately adjusted according to the specific material of the core body, and the temperature and duration that need to withstand high temperatures.

[0046] The utility model achieves the purpose of short-term high temperature resistance by adding an outer surface coating 4 to the MT ferrule produced by a conventional process, without changing the production process of the MT ferrule body, which is convenient for mass production; the manufacturing process of the outer surface coating 4 can ensure that the thickness of the coating has high consistency, so that the temperature resistance performance of the obtained MT ferrule has consistency.

[0047] The outer surface coating 4 comprises a single layer or a combination of multiple layers of the following coatings:

[0048] Thermal conductive coating: has good toughness, hardness and thermal conductivity;

[0049] Thermal insulation coating: has good toughness, hardness and thermal insulation properties;

[0050] Bonding coating: increasing the bonding force between the coating and the MT ferrule main body material, and between single-layer coatings, so that the outer surface coating 4 as a whole is tightly bonded to the MT ferrule main body material.

[0051] Protective coating: It is arranged on the outermost layer of the outer surface coating 4 and has good toughness and hardness, providing mechanical protection for the outer surface coating 4.

[0052] When the short-term high-temperature resistant MT ferrule is in a short-term high-temperature environment, the outer surface coating 4 has good toughness and hardness, and the deformation amount is small with the temperature increase, and is closely combined with the internal MT ferrule body or closely combined due to the bonding coating therebetween, so as to support the structure of the MT ferrule body, thereby reducing the shrinkage deformation amount of the MT ferrule body; and because the material of the thermal conductive coating has good thermal conductivity, the MT ferrule inside the coating maintains the uniformity of the internal temperature in the short-term high-temperature environment, so that no large local deformation occurs; or because the thermal insulation coating has good thermal insulation, the MT ferrule inside the coating undergoes a small temperature change in the short-term high-temperature environment, so that no large local deformation occurs.

[0053] The above characteristics can greatly reduce the shrinkage deformation of the MT ferrule, thereby reducing its loss change, allowing it to withstand short-term high temperature environments.

[0054] Example 2

[0055] The difference between this embodiment and embodiment 1 is that the outer surface coating 4 is located at Figure 1 The material, number of layers and thickness of the four surfaces shown, namely, the upper, lower, left and right surfaces, are selected according to the material of the MT ferrule body, as well as the maximum temperature and tolerance time that need to be tolerated.

[0056] In this embodiment, the end face of the ferrule body 1 has a fiber arrangement hole 5, and the end face corresponds to the rear end of the ferrule body 1, and the rear end is provided with a tail sheath 3; multiple optical fibers 2 pass through the tail sheath 3 and penetrate into the fiber arrangement hole 5 on the ferrule body.

[0057] In this embodiment, the outer surface coating 4 has a three-layer structure: the innermost layer is a bonding coating, which is made of Ta2O5 and has a thickness of 30 mm; the second layer is a bonding coating, which is made of SiO2 and has a thickness of 80 mm; the outermost layer is a thermal conductive coating, which is made of metal Ti and has a thickness of 200 mm; the outermost layer is a layer away from the core body 1.

[0058] In this embodiment, the innermost layer of the outer surface coating 4 and the second layer of the bonding coating make the thermal conductive coating and the ferrule body have good bonding force; the outermost layer of the outer surface coating 4 is a thermal conductive coating, which has excellent thermal conductivity, toughness and hardness. When the MT ferrule that can withstand short-term high temperature is in a short-term high temperature environment, the thermal conductive coating makes the temperature of each part of the MT ferrule body uniform, so that no local deformation will occur inside the MT ferrule; then, through the hardness and toughness of the outer surface coating 4 and the characteristics of small deformation, a frame that maintains its structure is formed outside the MT ferrule body, thereby reducing the shrinkage deformation of the MT ferrule body, and then reducing the increase in insertion loss of the MT ferrule body, so that it can withstand a short-term high temperature environment.

[0059] This embodiment takes a three-layer coating structure as an example to describe an implementation method of a short-term high temperature resistant MT ferrule. The purpose of the invention described above can also be achieved by using a thermal conductive coating or a thermal insulation coating alone, or using other coating combinations, or using a combination of multiple thermal conductive coatings or multiple thermal insulation coatings.

[0060] Example 3

[0061] The difference between this embodiment and embodiment 1 is that the outer surface coating 4 is located at Figure 1 The material, number of layers and thickness of the four surfaces shown, namely, the upper, lower, left and right surfaces, are selected according to the material of the MT ferrule body, as well as the maximum temperature and tolerance time that need to be tolerated.

[0062] In this embodiment, the end face of the ferrule body 1 has a fiber arrangement hole 5, and the end face corresponds to the rear end of the ferrule body 1, and the rear end is provided with a tail sheath 3; multiple optical fibers 2 pass through the tail sheath 3 and penetrate into the fiber arrangement hole 5 on the ferrule body.

[0063] In this embodiment, the outer surface coating 4 has a three-layer structure: the innermost layer is a bonding coating, which is made of Ta2O5 and has a thickness of 80 mm; the second layer is a thermal conductive coating, which is made of metal Ti and has a thickness of 200 mm; the outermost layer is a protective coating, which is made of Al2O3 and has a thickness of 80 mm; the outermost layer is a layer away from the core body 1.

[0064] In this embodiment, the innermost bonding coating of the outer surface coating 4 enables the thermal conductive coating and the ferrule body to have good bonding force; the middle layer of the outer surface coating 4 is a thermal conductive coating, which has excellent thermal conductivity, toughness and hardness. When the MT ferrule that can withstand short-term high temperature is in a short-term high temperature environment, the thermal conductive coating makes the temperature of each part of the MT ferrule body uniform, so that no local deformation will occur inside the MT ferrule; then, through the hardness and toughness of the outer surface coating 4 and the characteristics of small deformation, a framework that maintains its structure is formed outside the MT ferrule body, thereby reducing the amount of shrinkage deformation generated by the MT ferrule body, and then reducing the increase in insertion loss of the MT ferrule body, so that it can withstand a short-term high temperature environment. The outermost layer of the outer surface coating is a protective coating, which has similar hardness and toughness as the thermal conductive coating, and has the characteristic of being resistant to wipe, which can protect the internal thermal conductive coating from wear during use.

[0065] This embodiment takes a three-layer coating structure as an example to describe an implementation method of a short-term high temperature resistant MT ferrule. The purpose of the invention described above can also be achieved by using a thermal conductive coating or a thermal insulation coating alone, or using other coating combinations, or using a combination of multiple thermal conductive coatings or multiple thermal insulation coatings.

[0066] Experimental example:

[0067] The high temperature resistant 12-core MT ferrule in Example 2 was used to make a 12-core connector, which was then placed at 240°C for 10 minutes. The average data before and after each channel of the 12-core connector was compared. Figure 3 and Figure 4 As shown, it can be seen from the experimental results that the main indicators of the optical fiber end face and the final insertion loss change of the short-term high temperature resistant MT ferrule before and after the short-term high temperature treatment are very ideal, meeting the needs of normal use.

[0068] The background section of the present invention may contain background information about the problem or environment of the present invention, but does not necessarily describe the prior art. Therefore, the content included in the background section is not an admission by the applicant that the prior art is available.

[0069] The above content is a further detailed description of the present invention in combination with specific / preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, without departing from the concept of the present invention, it can also make several substitutions or modifications to these described embodiments, and these substitutions or modifications should be regarded as belonging to the protection scope of the present invention. In the description of this specification, the description of reference terms "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In the absence of mutual contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and modifications can be made herein without departing from the scope of protection of the patent application.

Claims

1. An MT ferrule, characterized in that: It includes a core body and an optical fiber. The end face of the core body is provided with an optical fiber arrangement hole. The optical fiber arrangement hole penetrates the core body to a side surface corresponding to the end face of the core body. The optical fiber is fixed to the core body through the optical fiber arrangement hole. The remaining surface of the core body is provided with an outer surface coating.

2. The MT ferrule according to claim 1, characterized in that: The outer surface coating includes at least one layer of a thermal conductive coating and / or a thermal insulation coating.

3. The MT ferrule according to claim 2, characterized in that: The outer surface coating further includes a bonding coating, wherein the bonding coating is located between the insert body and the at least one layer of the outer surface coating, and / or the bonding coating is located between the thermal conductive coating and the thermal insulation coating.

4. The MT ferrule according to claim 3, characterized in that: The outermost layer of the outer surface coating also includes a protective coating.

5. The MT ferrule according to claim 4, characterized in that: A tail sheath is provided on a side surface corresponding to the end surface of the ferrule body, and the optical fiber passes through the tail sheath and penetrates into the optical fiber arrangement hole.

6. The MT ferrule according to claim 5, characterized in that: The material of the thermal conductive coating is titanium or chromium, and the thickness of each layer of the thermal conductive coating is 80 to 200 microns; the material of the thermal insulation coating is titanium dioxide, cerium dioxide or tantalum pentoxide, and the thickness of each layer of the thermal insulation coating is 80 to 200 microns.

7. The MT ferrule according to claim 5, characterized in that: The material of the bonding coating is tantalum pentoxide, magnesium difluoride or silicon dioxide, and the thickness of each layer of the bonding coating is 30 to 80 microns; The material of the protective coating is silicon dioxide, magnesium difluoride or aluminum oxide, and the thickness of each layer of the protective coating is 30 to 80 microns.

8. The MT ferrule according to claim 5, characterized in that: The outer surface coating covers the end face and a side surface corresponding to the end face, and the thickness of the outer surface coating is at least 30 microns.

9. A joint, characterized in that: The invention comprises the MT ferrule according to any one of claims 1 to 8.

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