Tail fiber upper piece and optical device

Abstract

The utility model provides a tail fiber upper piece and an optical device, and relates to the technical field of optical communication modules. The tail fiber upper piece comprises an optical fiber and an optical fiber fixing piece. The optical fiber is provided with a bare fiber and a protective layer wrapping the bare fiber. The bare fiber comprises a connecting part exposed out of the protective layer and an extension part wrapped by the protective layer. The optical fiber fixing piece comprises a first end face and a second end face which are opposite, a first through hole communicated with the first end face and the second end face is formed in the optical fiber fixing piece, the connecting part penetrates through the first through hole, at least part of the connecting part is located in the first through hole, the extension part is located outside the first through hole, and the extension part is closer to the second end face relative to the first end face. And a sealing layer is arranged between the connecting part and the hole wall of the first through hole. By arranging the sealing layer, the sealing performance between the bare fiber and the optical fiber fixing piece can be improved, and the liquid cooling requirement of the optical device is met.

Description

Technical Field

[0001] The utility model relates to the technical field of optical communication modules, in particular to a pigtail upper part and an optical device. Background Art

[0002] As the speed and number of optical devices used in data centers gradually increase, the average power of a single cabinet in global data centers also increases, resulting in huge power losses. In order to effectively reduce the power usage efficiency index (PUE) of data centers and reduce the power costs of data centers, most of them currently use liquid cooling solutions for data centers, which forces the optical devices in data centers to meet the requirements of liquid cooling solutions.

[0003] At present, there are many press-fit gaps and glue processes in the structure of optical devices, which cannot achieve effective liquid-tightness and air-tightness. When the optical device is immersed in fluorinated liquid and affected by other gases, the stability and reliability of the internal optical path cannot be guaranteed. Utility Model Content

[0004] The utility model aims to provide a pigtail upper part and an optical device, which have reliable sealing performance and can ensure the stability and reliability of the internal optical path in a liquid cooling environment.

[0005] The embodiment of the utility model is achieved as follows:

[0006] In a first aspect, the utility model provides a pigtail upper part, comprising:

[0007] An optical fiber, the optical fiber comprising a bare fiber and a protective layer coated outside the bare fiber; the bare fiber comprises a connecting portion exposing one end of the protective layer and an extension portion coated by the protective layer;

[0008] An optical fiber fixing member, the optical fiber fixing member comprising a first end face and a second end face opposite to each other, a first through hole communicating the first end face and the second end face is provided in the optical fiber fixing member, the connecting portion is passed through the first through hole, the connecting portion is at least partially located in the first through hole, the extension portion is located outside the first through hole, and the extension portion is closer to the second end face than the first end face;

[0009] A sealing layer is provided between the connecting portion and the hole wall of the first through hole, and the sealing layer seals and connects the connecting portion and the hole wall of the first through hole.

[0010] In an optional embodiment, the connecting portion is provided with a first plating layer, and the hole wall of the first through hole is provided with a second plating layer; the sealing layer is solder; the first plating layer, the second plating layer and the solder are melted to seal the connecting portion and the hole wall of the first through hole together.

[0011] In an optional embodiment, the first coating layer and the second coating layer are both made of metal.

[0012] In an optional embodiment, it also includes a fixing ring, which is provided with a second through hole connected to the first through hole, and the connecting part is partially provided in the second through hole and partially provided in the first through hole; the optical fiber fixing piece is provided with a third through hole connected to the first through hole, and the fixing ring is provided in the third through hole.

[0013] In an optional embodiment, the fixing ring is sealed and connected to the hole wall of the third through hole of the optical fiber fixing member, and the hole wall of the second through hole of the fixing ring is sealed and connected to the connecting portion.

[0014] In an optional embodiment, the pigtail upper part further includes protective glue, the protective glue is bonded to the end of the optical fiber fixing part away from the fixing ring, and the protective glue covers a portion of the extension part.

[0015] In an optional embodiment, an end surface of the connecting portion away from the protective layer is flush with an end surface of the fixing ring.

[0016] In a second aspect, the utility model provides an optical device, comprising a coaxial package, a mounting ring and a pigtail top piece as described in any one of the aforementioned embodiments, wherein one end of the mounting ring is connected to the coaxial package, and the other end is connected to the pigtail top piece.

[0017] In an optional embodiment, the coaxial packaging component includes a tube cap, the tube cap and the mounting ring are welded or bonded, and the mounting ring and the optical fiber fixing component are welded or bonded.

[0018] In an optional embodiment, the tube cap and the mounting ring, and the mounting ring and the optical fiber fixing member are respectively laser spin welded.

[0019] The beneficial effects of the embodiments of the utility model include:

[0020] The pigtail top part provided by the embodiment of the utility model has a sealing layer between the connecting part of the bare fiber and the hole wall of the first through hole of the optical fiber fixing part. The sealing layer seals the connecting part and the hole wall of the first through hole. By providing the sealing part, the gap between the bare fiber and the optical fiber fixing part can be well sealed, so that the pigtail top part has good sealing performance, meets the requirements of air tightness and liquid tightness, is suitable for liquid cooling environment, and can also ensure the reliability and stability of the internal optical path in the liquid cooling environment.

[0021] The optical device provided by the embodiment of the utility model, including the above-mentioned pigtail upper part, has good sealing performance and can ensure the reliability and stability of the internal optical path even when used in a liquid cooling environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the overall structure of the pigtail upper member provided in an embodiment of the utility model;

[0024] Figure 2 A schematic diagram of the split structure of the pigtail upper part provided in an embodiment of the utility model;

[0025] Figure 3 A schematic cross-sectional structure diagram of a pigtail upper member provided in an embodiment of the utility model;

[0026] Figure 4 A schematic diagram of the structure of an optical fiber of a pigtail top member provided in an embodiment of the utility model;

[0027] Figure 5 A schematic diagram of the structure of an optical fiber fixing member of a pigtail upper member provided in an embodiment of the utility model;

[0028] Figure 6 A schematic cross-sectional structure diagram of an optical fiber fixing member of a pigtail upper member provided in an embodiment of the utility model;

[0029] Figure 7 A schematic diagram of another split structure of the pigtail upper member provided in an embodiment of the utility model;

[0030] Figure 8 Another schematic cross-sectional structure diagram of a pigtail upper member provided in an embodiment of the utility model;

[0031] Fig. 9 Another schematic cross-sectional structure diagram of an optical fiber fixing member of a pigtail upper member provided in an embodiment of the utility model;

[0032] Fig.10 A schematic diagram of the overall structure of an optical device provided in an embodiment of the utility model;

[0033] Fig.11 A schematic cross-sectional structure diagram of an optical device provided in an embodiment of the utility model;

[0034] Fig.12 A schematic diagram of the stacked structure of welding points when welding the mounting ring provided in an embodiment of the utility model.

[0035] Icons: 100-pigtail top; 110-optical fiber; 111-bare fiber; 113-protective layer; 115-connecting part; 116-extension part; 117-first coating; 120-optical fiber fixing part; 1201-first end face; 1203-second end face; 121-first through hole; 122-sealing layer; 123-second coating; 125-third through hole; 126-fifth coating; 127-fourth through hole; 130-fixing ring; 131-second through hole; 140-isolator; 150-protective glue; 200-optical device; 210-coaxial packaging part; 211-tube seat; 213-tube cap; 215-pin; 220-mounting ring; 230-solder point. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] 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 present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does 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 utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] The optical device provided in this embodiment can work in a liquid cooling environment, has good sealing performance, is suitable for a data center, and can meet the liquid cooling requirements of the data center.

[0043] Please refer to Figures 1 to 6 , this embodiment provides a pigtail top part 100. It includes an optical fiber 110 and an optical fiber fixing part 120. The optical fiber 110 has a bare fiber 111 and a protective layer 113 coated on the bare fiber 111. The bare fiber 111 includes a connecting portion 115 at one end of which the protective layer 113 is exposed and an extension portion 116 coated by the protective layer 113. The optical fiber fixing part 120 includes a first end face 1201 and a second end face 1203 opposite to each other. A first through hole 121 connecting the first end face 1201 and the second end face 1203 is provided in the optical fiber fixing part 120. The connecting portion 115 is penetrated in the first through hole 121, and the connecting portion 115 is at least partially located in the first through hole 121. The extension portion 116 is located outside the first through hole 121. The extension portion 116 is closer to the second end face 1203 relative to the first end face 1201. A sealing layer 122 is provided between the connecting portion 115 and the hole wall of the first through hole 121. The sealing layer 122 seals and connects the connecting portion 115 and the hole wall of the first through hole 121. The connecting portion 115 is provided with a first coating layer 117. The hole wall of the first through hole 121 is provided with a second coating layer 123. The sealing layer 122 is solder. When the connecting portion 115 and the hole wall of the optical fiber fixing member 120 are welded, the first coating layer 117, the second coating layer 123 and the solder are sintered and melted at a high temperature to seal and connect the connecting portion 115 and the hole wall of the first through hole 121 together. The sealing performance of the connection between the optical fiber 110 and the optical fiber fixing member 120 can be improved, the liquid cooling requirements of the optical device 200 can be met, and the reliability and stability of the internal optical path of the optical fiber 110 in the liquid cooling environment can be ensured.

[0044] The first plating layer 117 and the second plating layer 123 are both made of metal. For example, one or a mixture of any of gold, tin, copper, silver, tungsten, titanium, etc. is used. If the first plating layer 117 and the second plating layer 123 are made of gold, the solder can be a gold-tin solder paste or other solder. It should be noted that if one of the connecting portion 115 and the hole wall of the first through hole 121 is made of metal itself, a metal plating layer may be continuously provided on its surface, or a metal plating layer may not be provided.

[0045] The first coating 117 and the second coating 123 are made of the same material. In this way, the coating is more tightly combined during high temperature melting in the later stage, and the sealing is better. Of course, in some other embodiments, the material of the first coating 117 and the material of the second coating 123 may also be different, which is not specifically limited here.

[0046] The aperture of the first through hole 121 is adapted to the outer diameter of the bare fiber 111. Optionally, the cross section of the first through hole 121 is circular, and the diameter is about 125 um.

[0047] Combined with reference Figures 7 to 9 , the pigtail upper part 100 also includes a fixing ring 130. The fixing ring 130 is provided with a second through hole 131 connected to the first through hole 121. The connecting portion 115 of the bare fiber 111 is partially provided in the second through hole 131 and partially provided in the first through hole 121. The optical fiber fixing part 120 is provided with a third through hole 125 connected to the first through hole 121. The fixing ring 130 is provided in the third through hole 125. That is, a fixing ring 130 is added between the connecting portion 115 and the optical fiber fixing part 120. The provision of the fixing ring 130 makes it easier to perform laser cutting or grinding on the connecting portion 115. The fixing ring 130 can be made of metal or other non-metallic materials. The fixing ring 130 in this embodiment is made of metal. The structural strength is large, and it is convenient to provide a metal coating on the fixing ring 130. The fixing ring 130 is sealed and connected to the hole wall of the third through hole 125 of the optical fiber fixing member 120, and the hole wall of the second through hole 131 of the fixing ring 130 is sealed and connected to the connecting portion 115. Optionally, the aperture of the second through hole 131 is adapted to the outer diameter of the connecting portion 115. The hole wall of the second through hole 131 is provided with a third coating. The third coating, the coating on the connecting portion 115 and the solder are sintered and melted at a high temperature, so as to realize a sealed connection between the connecting portion 115 and the hole wall of the second through hole 131 of the fixing ring 130, thereby improving the sealing performance.

[0048] The outer surface of the fixing ring 130 is provided with a fourth plating layer. The hole wall of the third through hole 125 is provided with a fifth plating layer 126. The fourth plating layer and the fifth plating layer 126 are sintered and melted at high temperature using gold-tin solder paste or other solder to achieve a sealed connection between the fixing ring 130 and the hole wall of the third through hole 125 of the optical fiber fixing member 120, thereby improving the sealing performance.

[0049] It should be noted that the first, second, third, fourth and fifth coating layers 126 are only used to distinguish different positions of the coating layers, and their materials, coating methods, etc. are similar and are not limited one by one here.

[0050] Optionally, the end surface of the connecting portion 115 away from the protective layer 113 is flush with the end surface of the fixing ring 130. The connecting portion 115 passes through the second through hole 131 of the fixing ring 130. This arrangement can ensure the quality of the optical connection between the optical fiber 110 and the free space.

[0051] The pigtail upper part 100 further includes an isolator 140. The isolator 140 is disposed in the optical fiber fixing part 120 and is located at the end of the connecting part 115. In this embodiment, the isolator 140 is fixed to an end of the fixing ring 130 away from the protective layer 113. Specifically, the optical fiber fixing part 120 is provided with a fourth through hole 127 for mounting the isolator 140. The first through hole 121, the third through hole 125 and the fourth through hole 127 are located on the same axis and are interconnected.

[0052] Optionally, a protective glue 150 is provided between the optical fiber fixing member 120 and the protective layer 113 of the optical fiber 110. The protective glue 150 is bonded to the end of the optical fiber fixing member 120 away from the fixing ring 130, and the protective glue 150 covers part of the extension 116. The protective glue 150 includes hard glue and soft glue. The optical fiber fixing member 120 and the protective layer 113 of the optical fiber 110 can be fixed by hard glue, and the part covering the extension 116 can be transitioned and protected by soft glue.

[0053] The pigtail upper part 100 is provided with a coating on the surface of the connecting part 115 and the inner side of the optical fiber fixing part 120. The coating and the solder are sintered and melted to form a reliable seal, ensuring that the optical path inside the pigtail upper part 100 can work normally even in a liquid cooling environment, thereby ensuring the reliability and stability of the internal optical path.

[0054] Combination Fig.10 and Fig.11 The embodiment of the utility model further provides an optical device 200, comprising a coaxial package 210, a mounting ring 220 and a pigtail top piece 100 as in any of the above embodiments. One end of the mounting ring 220 is connected to the coaxial package 210, and the other end is connected to the pigtail top piece 100.

[0055] The coaxial package 210 includes a tube base 211, a tube cap 213 and a pin 215. The tube base 211 and the tube cap 213 are resistively welded to ensure good sealing. In this way, the lens, laser, laser heat sink, etc. in the tube cap 213 are not easily affected by the liquid cooling environment. The pin 215 is sintered on the tube base 211 at high temperature through a glass insulator to ensure the airtightness of the connection between the pin 215 and the tube base 211. The tube cap 213 adopts a flat window tube cap 213. The flat window glass is sintered with the metal part of the tube cap 213 through glass solder to improve the airtightness of the connection.

[0056] Combination Fig.12 , the tube cap 213 and the mounting ring 220 are welded or bonded, and the mounting ring 220 and the optical fiber fixture 120 are welded or bonded. Optionally, the tube cap 213 and the mounting ring 220, and the mounting ring 220 and the optical fiber fixture 120 are laser spin welded respectively. It can be understood that the laser spin welding method is adopted to ensure that the adjacent welding points 230 in the weld are stacked, and a 360° stack of welding points 230 is formed along the outer circumference of the mounting ring 220, thereby improving the air tightness of the welding. The weld formed by laser spin welding is fish scale-shaped, and the adjacent welding points 230 are stacked. This welding method is called fish scale welding. This welding method can ensure the sealing of the connection between the mounting ring 220 and the tube cap 213 and between the mounting ring 220 and the optical fiber fixture 120, and prevent liquid from entering the interior and affecting the normal and stable operation of the internal optical path.

[0057] Of course, in some embodiments, the mounting ring 220 and the cap 213 and the mounting ring 220 and the optical fiber fixture 120 may also be bonded, that is, sealed with glue to improve the sealing of the connection. Alternatively, bonding and welding may be combined, which is not specifically limited here.

[0058] In summary, the pigtail top piece 100 and the optical device 200 provided by the embodiment of the utility model have the following beneficial effects:

[0059] The pigtail top part 100 provided by the embodiment of the utility model is provided with a coating in the connection part 115 of the bare fiber 111 and the first through hole 121 of the optical fiber fixing part 120. The coating and the solder are sintered and melted to form an effective seal, so that the pigtail top part 100 has good sealing performance, meets the requirements of air tightness and liquid tightness, is suitable for liquid cooling environment, and can also ensure the reliability and stability of the internal optical path in the liquid cooling environment. A fixing ring 130 is provided to protect the bare fiber 111, which is convenient for cutting or grinding the bare fiber 111.

[0060] The optical device 200 provided by the embodiment of the utility model includes the above-mentioned pigtail upper part 100, the tube seat 211 and the tube cap 213 are welded by resistance welding, and fish scale welding is adopted between the mounting ring 220 and the tube cap 213 and between the mounting ring 220 and the optical fiber fixing part 120, so as to improve the sealing of the connection and prevent liquid from entering the interior and affecting the normal and stable operation of the internal optical path. It is suitable for liquid cooling environment, can meet the sealing requirements of the optical device 200 in data centers, and has more flexible and extensive application scenarios.

[0061] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pigtail top, characterized in that: include: An optical fiber (110), the optical fiber (110) comprising a bare fiber (111) and a protective layer (113) coated outside the bare fiber (111); the bare fiber (111) comprises a connecting portion (115) exposing the protective layer (113) and an extension portion (116) coated by the protective layer (113); An optical fiber fixing member (120), the optical fiber fixing member (120) comprising a first end face (1201) and a second end face (1203) opposite to each other, a first through hole (121) communicating with the first end face (1201) and the second end face (1203) being provided in the optical fiber fixing member (120), the connecting portion (115) being passed through the first through hole (121), the connecting portion (115) being at least partially located in the first through hole (121), the extension portion (116) being located outside the first through hole (121), and the extension portion (116) being closer to the second end face (1203) than the first end face (1201); A sealing layer (122) is provided between the connecting portion (115) and the hole wall of the first through hole (121), and the sealing layer (122) seals and connects the connecting portion (115) and the hole wall of the first through hole (121).

2. The pigtail top piece according to claim 1, characterized in that: The connecting portion (115) is provided with a first plating layer (117), the hole wall of the first through hole (121) is provided with a second plating layer (123), and the sealing layer (122) is solder; the first plating layer (117), the second plating layer (123) and the solder are melted to seal the connecting portion (115) and the hole wall of the first through hole (121) together.

3. The pigtail top piece according to claim 2, characterized in that: The first coating layer (117) and the second coating layer (123) are both made of metal.

4. The pigtail top piece according to claim 1, characterized in that: The optical fiber fixing member (120) further comprises a fixing ring (130), wherein the fixing ring (130) is provided with a second through hole (131) connected to the first through hole (121), wherein the connecting portion (115) is partially provided in the second through hole (131) and partially provided in the first through hole (121); and the optical fiber fixing member (120) is provided with a third through hole (125) connected to the first through hole (121), and the fixing ring (130) is provided in the third through hole (125).

5. The pigtail top piece according to claim 4, characterized in that: The fixing ring (130) is sealedly connected to the hole wall of the third through hole (125) of the optical fiber fixing member (120), and the hole wall of the second through hole (131) of the fixing ring (130) is sealedly connected to the connecting portion (115).

6. The pigtail top piece according to claim 4, characterized in that: The pigtail upper part also includes a protective glue (150), which is bonded to the end of the optical fiber fixing part (120) away from the fixing ring (130), and the protective glue (150) covers a part of the extension part (116).

7. The pigtail top piece according to claim 4, characterized in that: An end surface of the connecting portion (115) away from the protective layer (113) is flush with an end surface of the fixing ring (130).

8. An optical device, characterized in that: It comprises a coaxial packaging component (210), a mounting ring (220) and a pigtail top piece according to any one of claims 1 to 7, wherein one end of the mounting ring (220) is connected to the coaxial packaging component (210), and the other end is connected to the pigtail top piece.

9. The optical device according to claim 8, characterized in that: The coaxial packaging component (210) comprises a tube cap (213); the tube cap (213) and the mounting ring (220) are welded or bonded; and the mounting ring (220) and the optical fiber fixing component (120) are welded or bonded.

10. The optical device according to claim 9, characterized in that: The tube cap (213) and the mounting ring (220), and the mounting ring (220) and the optical fiber fixing member (120) are respectively laser-rotation welded.

Images