Lightweight high-reliability optical fiber assembly

Abstract

The application discloses a light-weight high-reliability optical fiber assembly which is composed of an input end, a splitter, an output end and a transmission optical fiber, is used for efficiently receiving and transmitting optical signals and can be applied to occasions such as a laser radar system. The assembly has a main-backup path redundancy design and high reliability, follows a light-weight design principle, is compact in structure and light in weight, is excellent in vibration resistance and impact resistance after endurance mechanical environment design, is strong in anti-radiation capacity through anti-radiation reinforcement design and can guarantee long-term work of the optical fiber assembly in a space environment such as a satellite.

Description

Technical Field

[0001] This invention relates to an optical fiber assembly, and more particularly to a lightweight and highly reliable optical fiber assembly. Background Technology

[0002] In multi-beam lidar, it is necessary to guide the echo light signal from the receiving lens into the relay optical assembly. Previous spatial light transmission methods suffer from high assembly and adjustment difficulties and sensitivity to jitter, making them unsuitable for application requirements. This invention proposes an optical fiber assembly that can efficiently collect and transmit the echo light signal from the optical focal plane of the receiving lens and guide it into the relay optical assembly, solving the problems of previous transmission methods. Summary of the Invention

[0003] The technical problem solved by this invention is to overcome the shortcomings of the prior art and provide a lightweight and highly reliable optical fiber assembly with a primary and backup redundancy design, which has high reliability; it follows the principle of lightweight design, with a compact structure and light weight; through mechanical environment resistance design, it has excellent vibration and shock resistance; and it adopts radiation-resistant reinforcement design, which has strong radiation resistance and can ensure that the optical fiber assembly can work for a long time in space environments such as satellites.

[0004] The technical solution of this invention is:

[0005] A lightweight and highly reliable optical fiber assembly is characterized by comprising an optical fiber, an input terminal I, a splitter II, and an output terminal III. The optical fiber comprises at least two fibers, one end of which is bundled together by connecting to the input terminal I, and the other end is split by the splitter II. Each fiber is connected to an output terminal III at its end.

[0006] Input terminal I is used to connect to the optical focal plane of the receiving lens that transmits echo light signals, and output terminal III is used to connect to the relay optical components.

[0007] The input terminal I includes a two-core ferrule base, a two-core flange, a two-core connecting nut, and a two-core compression sleeve a. The two-core ferrule base has a small hole to fix the optical fiber in the small hole. The size and position accuracy of the small hole are ensured by precision machining to meet the requirements of optical signal transmission. The two-core flange is sleeved outside the two-core ferrule base and has an interference fit with the two-core ferrule base. An armored tube a is provided outside the optical fiber. The outer surface of the two-core ferrule base has a rectangular groove. The two-core compression sleeve a presses the armored tube a tightly against the outside of the two-core ferrule base. The two-core connecting nut is threaded to one end of the two-core flange and is sleeved outside the two-core compression sleeve a.

[0008] The two-core insert base is fitted with a keyway between the two-core flange to prevent the two-core insert base from rotating within the two-core flange.

[0009] The PEEK sheath a is arranged between the optical fiber and the armored empty pipe a; the thermal shrinkage sleeve b is arranged outside the armored empty pipe a; the thermal shrinkage sleeve a is arranged outside the two-core connecting nut and the thermal shrinkage sleeve b.

[0010] The optical fiber is fixed in the small hole of the two-core ferrule base by the 353ND optical fiber adhesive a; the internal gap between the two-core ferrule base and the two-core flange is filled with the 2651 epoxy resin adhesive a; the gap between the two-core ferrule base and the optical fiber, the PEEK sheath a and the armored empty pipe a is filled with the 353ND optical fiber adhesive a, so as to ensure the firm connection between the optical fiber and the two-core ferrule base.

[0011] The splitter II comprises a splitter shell, a two-core wire fixing cylinder, a single-core wire fixing cylinder, a splitter cover plate, a two-core pressing sleeve b and a single-core pressing sleeve b; the internal space of the splitter shell is elongated, so as to reduce the bending curvature of the optical fiber when the optical fiber is divided into two paths, and reduce the loss of optical energy; the two-core wire fixing cylinder is connected to one end of the splitter shell, and the single-core wire fixing cylinder is connected to the other end of the splitter shell; the two-core pressing sleeve b is arranged outside the two-core wire fixing cylinder; the splitter cover plate is arranged in the groove at the end of the splitter shell, and the splitter cover plate is connected to the splitter shell through screws; the armored empty pipe b is arranged outside the single optical fiber, and the single-core pressing sleeve b is arranged outside the single-core wire fixing cylinder.

[0012] The PEEK sheath b is arranged between the armored empty pipe b and the single optical fiber; a small amount of GD414 silicone rubber is filled in the internal space of the splitter shell, so as to fix the optical fiber in the internal space of the splitter shell; the mounting ears are arranged outside the middle part of the splitter shell, and the splitter shell is fixed through the two through holes in the mounting ears; the splitter shell is made of aluminum alloy, and the surface is subjected to anodic oxidation blackening treatment; the thermal shrinkage sleeve c is arranged outside the two-core pressing sleeve b and the armored empty pipe a, and the thermal shrinkage sleeve d is arranged outside the single-core pressing sleeve b and the armored empty pipe b.

[0013] The output end III comprises a single-core ferrule base, a single-core flange, a single-core connecting nut and a single-core pressing sleeve a; the single-core ferrule base has a small hole at one end, and the optical fiber is fixed in the small hole; the single-core flange is arranged outside the single-core ferrule base and is in interference fit with the outside of the single-core ferrule base; the key groove is arranged between the single-core ferrule base and the single-core flange, so as to prevent the single-core ferrule base from rotating in the single-core flange; the rectangular groove is arranged outside one end of the single-core ferrule base, and is used for cooperating with the single-core pressing sleeve a to press the armored empty pipe b outside the single-core ferrule base; the single-core connecting nut is threadedly connected to the single-core flange, and the single-core connecting nut is arranged outside the single-core pressing sleeve a.

[0014] The armored empty pipe b is provided with a PEEK sheath b between the optical fiber; the armored empty pipe b is provided with a heat-shrinkable sleeve g and a heat-shrinkable sleeve f outside, and the heat-shrinkable sleeve f and the single-core connecting nut are provided with a heat-shrinkable sleeve e outside; the optical fiber is fixed into the small hole of the single-core ferrule base through 353ND optical fiber adhesive b; the internal gap of the single-core ferrule base and the single-core flange is filled with 2651 epoxy resin adhesive b; the gap of the single-core ferrule base and the optical fiber, the PEEK sheath b and the armored empty pipe b is filled with 353ND optical fiber adhesive b.

[0015] The optical fiber is selected from a large core diameter, high numerical aperture and radiation-resistant multimode optical fiber.

[0016] In summary, the present application at least includes the following beneficial technical effects:

[0017] (1) The main and standby road redundancy design is adopted, and the reliability is high;

[0018] (2) The light weight design is adopted, and the structure is compact and light in weight;

[0019] (3) Excellent mechanical environment design, excellent vibration and impact resistance;

[0020] (4) Anti-radiation reinforcement design, strong radiation resistance. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a three-dimensional overall structure schematic diagram of the optical fiber assembly of the present application;

[0022] Figure 2 It is a two-dimensional overall structure schematic diagram of the optical fiber assembly of the present application;

[0023] Figure 3 It is a cross-sectional structure schematic diagram of the input end of the optical fiber assembly of the present application;

[0024] Figure 4 It is a cross-sectional structure schematic diagram of the splitter part of the optical fiber assembly of the present application;

[0025] Figure 5 It is a cross-sectional structure schematic diagram of the output end of the optical fiber assembly of the present application;

[0026] Figure 6 It is a cross-sectional structure schematic diagram of the input end optical fiber and sheath of the optical fiber assembly of the present application;

[0027] Figure 7 It is a cross-sectional structure schematic diagram of the output end optical fiber and sheath of the optical fiber assembly of the present application.

[0028] Legend: I, input end; II, one splitter; III, two output ends;

[0029] 1, two-core ferrule base; 2, two-core flange; 3, two-core connecting nut; 4, two-core pressing sleeve a;

[0030] 5, splitter housing; 6, two-core fixed wire drum; 7, single-core fixed wire drum; 8, splitter cover plate;

[0031] 9, single-core plug-in core base; 10, single-core flange; 11, single-core connecting nut; 12, single-core pressing sleeve a;

[0032] 13, optical fiber; 14, PEEK sheath a; 15, armored empty tube a; 16, 2651 epoxy resin glue a; 17, 353ND optical fiber adhesive a; 18, heat shrink sleeve a; 19, GD414 silicone rubber; 20, PEEK sheath b; 21, armored empty tube b; 22, heat shrink sleeve b;

[0033] 29, two-core pressing sleeve b; 30, single-core pressing sleeve b; 28, heat shrink sleeve c; 31, heat shrink sleeve d; 35, 2651 epoxy resin glue b; 36, 353ND optical fiber adhesive b; 32, heat shrink sleeve e; 33, heat shrink sleeve f; 34, heat shrink sleeve g; 37, spiral steel tube; 38, Kevlar / braided layer; 39, ETFE outer protective layer. DETAILED DESCRIPTION

[0034] The present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0035] The embodiment of the present application discloses a light-weight and high-reliability optical fiber assembly, as shown in Figure 1 and Figure 2 The overall structure is composed of an input end I, a splitter II, two output ends III, and optical fibers and sheaths connecting each part. The optical signal enters the main and standby optical fibers through the input end I, the main and standby optical fibers are divided into two independent paths through the splitter II, and finally the optical signal is output through the output end III of the main and standby optical fibers.

[0036] As shown in Figure 3The input end is shown as a cross-sectional structure diagram, including two-core ferrule base 1, two-core flange 2, two-core connecting nut 3, two-core pressing sleeve a4, optical fiber 13, PEEK sheath a14, armored empty tube a15, 2651 epoxy resin glue a16, 353ND optical fiber adhesive a17, heat shrink sleeve a18, heat shrink sleeve b22. Two-core ferrule base 1 has two small holes at one end, and 353ND optical fiber adhesive a17 is used to fix the cores / cladding of the main and standby link optical fibers 13 in the two small holes. The size and position accuracy of the two small holes, such as hole diameter, hole center distance, and hole axis angle, are ensured through precision machining, and a large core diameter, high numerical aperture multimode optical fiber is selected. Through the above measures, it can be ensured that the incident light is fully received by the optical fiber, the optical energy loss is reduced, the optical transmission efficiency is improved, and the optical performance transmission requirement is met. The two-core ferrule base 1 is in interference fit with the two-core flange 2, and the distance between the end faces of the two-core ferrule base 1 and the two-core flange 2 is ensured through special tool installation. There is a key groove between the two-core ferrule base 1 and the two-core flange 2 to prevent the two-core ferrule base 1 from rotating in the two-core flange 2, and to improve the mechanical environmental reliability of the optical fiber assembly. The stepped hole inside the two-core ferrule base 1 is used to install the spiral steel pipe in the PEEK sheath a14 and the armored empty tube a15. The 2651 epoxy resin glue a16 is poured into the inside through the glue pouring holes on both sides of the two-core ferrule base 1 to fill the gap between the two-core ferrule base 1 and the two-core flange 2. The gap between the optical fiber 13, the PEEK sheath a14, the armored empty tube a15 and the two-core ferrule base 1 is filled with 353ND optical fiber adhesive a17 to ensure the firm connection of the optical fiber 13 and the two-core ferrule base 1. There are several rectangular grooves at the other end of the two-core ferrule base 1, which can effectively press the Kevlar / braided layer of the armored empty tube a15 in cooperation with the two-core pressing sleeve 4, provide tensile protection for the optical fiber 13, and increase the tensile capacity of the optical fiber assembly. The two-core flange 2 is designed with external threads at one end, which cooperates with the two-core connecting nut 3 to fix the input end as a whole and protect the internal structure of the input end. The 2651 epoxy resin glue is dotted on the external threads of the two-core flange 2 to prevent loosening. The heat shrink sleeve a18 is installed at the other end of the two-core connecting nut 3 to improve the bending resistance of the optical fiber assembly. Several rectangular grooves are designed on the two-core connecting nut 3 to increase the bonding of the heat shrink sleeve a18. The heat shrink sleeve b22 is installed below the heat shrink sleeve a18 to increase the smoothness of the transition of the heat shrink sleeve a18. Through the above compact structure design, the size and weight are significantly reduced to achieve the purpose of lightweight. The pressing, glue pouring, and glue dotting methods further improve the mechanical properties of the optical fiber assembly and improve the reliability.

[0037] As Figure 4The cross-sectional structure of the splitter is shown in the schematic diagram, including the splitter housing 5, two-core fixed wire drum 6, single-core fixed wire drum 7, splitter cover plate 8, two-core pressing sleeve b29, single-core pressing sleeve b30, optical fiber 13, PEEK sheath a14, armored empty tube a15, GD414 silicone rubber 19, PEEK sheath b20, armored empty tube b21, heat shrink sleeve c28, heat shrink sleeve d31. The splitter housing 5 is used to divide the main and backup optical fibers 13 into two independent paths, achieving the purpose of main and backup path redundancy design. The internal space of the splitter housing 5 is elongated to minimize the bending curvature of the optical fiber 13 when it is divided into two paths, reduce optical energy loss, and ensure optical transmission efficiency. One end of the splitter housing 5 is connected to the input end through the optical fiber 13, and the two-core pressing sleeve b29 is pressed on the two-core fixed wire drum 6 by using the crimping pliers for fixing the armored empty tube a15. The two-core fixed wire drum 6 is connected with the splitter housing 5 through screws, and a point of thread glue is applied on the screw to prevent loosening. The other end of the splitter housing 5 is connected to the output end through the optical fiber 13, and the single-core pressing sleeve b30 is pressed on the single-core fixed wire drum 7 by using the crimping pliers for fixing the armored empty tube b21 of the main and backup links. The two single-core fixed wire drums 7 are pressed in the grooves at the end of the splitter housing 5 by using the splitter cover plate 8, and the splitter cover plate 8 is connected with the splitter housing 5 through screws, and a point of thread glue is applied on the screw to prevent loosening. A small amount of GD414 silicone rubber 19 is filled in the splitter housing 5 for fixing the optical fiber 13 and improving the vibration and impact resistance. A mounting ear is designed in the middle of the splitter housing 5, and the splitter housing 5 is fixed through the two through holes on the mounting ear. The parts of the splitter housing 5 are made of aluminum alloy material, which significantly reduces the weight of the product, and the surface is treated by anodic oxidation blackening to reduce the influence of stray light.

[0038] Figure 5The cross-sectional structure of the output end is shown in the schematic view, including a single-core ferrule base 9, a single-core flange 10, a single-core connecting nut 11, a single-core pressing sleeve a 12, an optical fiber 13, 2651 epoxy resin glue b 35, 353ND optical fiber adhesive b 36, heat shrink sleeve e 32, PEEK sheath b 20, armored empty tube b 21, heat shrink sleeve f 33, and heat shrink sleeve g 34. The single-core ferrule base 9 has a small hole at one end, and the core / cladding of the optical fiber is fixed in the small hole using 353ND optical fiber adhesive b 36. The single-core ferrule base 9 is in interference fit with the single-core flange 10, and the distance between the end face of the single-core ferrule base 9 and the end face of the single-core flange 10 is ensured by special tooling installation. There is a key groove between the single-core ferrule base 9 and the single-core flange 10 to prevent the single-core ferrule base 9 from rotating in the single-core flange 10, thereby improving the mechanical environmental reliability of the optical fiber assembly. The stepped hole inside the single-core ferrule base 9 is used to install the spiral steel tube in the PEEK sheath b 20 and the armored empty tube b 21. The 2651 epoxy resin glue b 35 is poured into the inside through the glue pouring holes on both sides of the single-core ferrule base 9 to fill the gap between the single-core ferrule base 9 and the single-core flange 10. The gap between the optical fiber 13, the PEEK sheath b 20, the armored empty tube b 21, and the single-core ferrule base 9 is completely filled with 353ND optical fiber adhesive b 36 to ensure firm connection of the optical fiber 13 and the single-core ferrule base 9. There are several rectangular grooves at the other end of the single-core ferrule base 9, which cooperate with the single-core pressing sleeve 12 to effectively press the Kevlar / braided layer of the armored empty tube b 21, provide tensile protection for the optical fiber 13, and increase the tensile capacity of the optical fiber assembly. The single-core flange 10 is designed with external threads at one end, which cooperate with the single-core connecting nut 11 to fix the output end as a whole and protect the internal structure of the output end. The 2651 epoxy resin glue is applied on the external threads of the single-core flange 10 to prevent loosening. The heat shrink sleeve e 32 is installed at the other end of the single-core connecting nut 11 to improve the bending resistance of the optical fiber assembly. Several rectangular grooves are designed on the single-core connecting nut 11 to increase the bonding of the heat shrink sleeve e 32. The heat shrink sleeve f 33 and the heat shrink sleeve g 34 are installed below the heat shrink sleeve e 32 to increase the smoothness of the transition of the heat shrink sleeve e 32. Through the above compact structure design, the size and weight are significantly reduced to achieve the purpose of lightweight. The methods such as crimping, glue pouring, and glue applying further improve the mechanical properties and reliability of the optical fiber assembly.

[0039] Figure 6The schematic diagram of the cross-sectional structure of the input end optical fiber and sheath. The optical fiber 13 is a large core diameter, high numerical aperture, radiation resistant multimode optical fiber, including a core / cladding 23 and an ETFE coating layer 24. The innermost layer of the armored empty tube a15 is a spiral steel tube 25, the middle layer is a Kevlar / braided layer 26, and the outermost layer is an ETFE outer sheath 27. The spiral steel tube 25 is made of stainless steel, which protects the internal optical fiber and increases the compression resistance of the optical fiber. The Kevlar / braided layer 26 improves the tensile strength of the optical fiber. The ETFE outer sheath improves the radiation resistance of the optical fiber. The PEEK sheath a14 is between the optical fiber 13 and the armored empty tube a15, which protects the optical fiber 13 from damage by the spiral steel tube 25 in the armored empty tube a15. By selecting radiation resistant optical fibers, designing a multi-layer sheath structure, and adding an ETFE outer sheath, the radiation resistance of the optical fiber assembly is significantly improved.

[0040] Figure 7 The schematic diagram of the cross-sectional structure of the output end optical fiber and sheath, which is designed the same as Figure 6 The input end. The optical fiber 13 includes a core / cladding 23 and an ETFE coating layer 24. The innermost layer of the armored empty tube b21 is a spiral steel tube 37, the middle layer is a Kevlar / braided layer 38, and the outermost layer is an ETFE outer sheath 39. The PEEK sheath b20 is between the optical fiber 13 and the armored empty tube b21.

[0041] The content not described in detail in the specification of the present application belongs to the known technology of the person skilled in the art.

[0042] Although the present application is disclosed with the preferred embodiments as above, it is not intended to limit the present application, and any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application should be defined by the scope of the claims of the present application.

Claims

1. A lightweight high-reliability fiber assembly, characterized by: It comprises optical fibers (13), input end I, distributor II, output end III, the optical fibers (13) comprise at least two, one end of the optical fibers (13) is bundled together through the connection input end I, the other end is separated through the distributor II, the end of each optical fiber (13) is connected with an output end III respectively; The input end I is used for connecting the optical focal plane of the receiving lens which emits echo optical signals, and the output end III is used for connecting the relay optical assembly; The input end I comprises two-core ferrule base (1), two-core flange (2) and two-core connecting nut (3), two-core pressing sleeve a (4); The two-core ferrule base (1) is provided with a small hole, the optical fiber (13) is fixed in the small hole, the size and position precision of the small hole are ensured through precision machining, and the optical signal transmission requirement is met; the two-core flange (2) is sleeved outside the two-core ferrule base (1), and the two-core flange (2) is in interference fit with the two-core ferrule base (1); The optical fiber (13) is provided with armored empty pipe a (15) outside, the outer surface of the two-core ferrule base (1) is provided with a rectangular groove, and the armored empty pipe a (15) is pressed tightly outside the two-core ferrule base (1) by the two-core pressing sleeve a (4); The two-core connecting nut (3) is threadedly connected to one end of the two-core flange (2), and the two-core connecting nut (3) is sleeved outside the two-core pressing sleeve a (4); The two-core ferrule base (1) and the two-core flange (2) are in key groove cooperation, so that the two-core ferrule base (1) is prevented from rotating in the two-core flange (2); The distributor II comprises distributor shell (5), two-core wire fixing cylinder (6), single-core wire fixing cylinder (7), distributor cover plate (8), two-core pressing sleeve b (29) and single-core pressing sleeve b (30); The internal space of the distributor shell (5) is long and narrow, so that the bending curvature of the optical fiber (13) when being separated from one way is reduced, and the optical energy loss is reduced; The two-core wire fixing cylinder (6) is connected to one end of the distributor shell (5), and the single-core wire fixing cylinder (7) is connected to the other end of the distributor shell (5); The two-core pressing sleeve b (29) presses the armored empty pipe a (15) outside the two-core wire fixing cylinder (6); The distributor cover plate (8) presses at least two single-core wire fixing cylinders (7) in the grooves at the end of the distributor shell (5), each optical fiber (13) passes through a single-core wire fixing cylinder (7), and the distributor cover plate (8) is connected with the distributor shell (5) through screws; The single optical fiber (13) is sleeved with armored empty pipe b (21) outside, and the armored empty pipe b (21) is pressed tightly outside the single-core wire fixing cylinder (7) by the single-core pressing sleeve b (30); A small amount of GD414 silicone rubber (19) is filled in the internal space of the distributor shell (5), so as to fix the optical fiber (13) in the internal space of the distributor shell (5).

2. The lightweight high-reliability optical fiber assembly of claim 1, wherein: PEEK sheath a (14) is arranged between the optical fiber (13) and the armored empty pipe a (15); The armored empty pipe a (15) is provided with heat shrinkable sleeve b (22) outside, and the two-core connecting nut (3) and the heat shrinkable sleeve b (22) are provided with heat shrinkable sleeve a (18) outside.

3. The lightweight high-reliability fiber optic assembly of claim 2, wherein: The optical fiber (13) is fixed in the small hole of the two-core ferrule base (1) through 353ND optical fiber adhesive a (17); The internal gap between the two-core ferrule base (1) and the two-core flange (2) is filled with 2651 epoxy resin adhesive a (16). The gap between the two-core ferrule base (1) and the optical fiber (13), PEEK sheath a (14), armored empty tube a (15) is filled with 353ND optical fiber adhesive a (17), which ensures the firm connection between the optical fiber (13) and the two-core ferrule base (1).

4. The lightweight high-reliability fiber optic assembly of claim 3, wherein: The PEEK sheath b (20) is arranged between the armored empty tube b (21) and the single optical fiber (13). The middle part of the distribution box shell (5) is externally provided with mounting ears, and the distribution box shell (5) is fixed through the through holes in the mounting ears; the distribution box shell (5) is made of aluminum alloy and is subjected to anodic oxidation blackening treatment on the surface. The two-core pressing sleeve b (29) and the armored empty tube a (15) are externally provided with heat shrinkable sleeves c (28), and the single-core pressing sleeve b (30) and the armored empty tube b (21) are externally provided with heat shrinkable sleeves d (31).

5. The lightweight high-reliability fiber optic assembly of claim 1, wherein: The output end III comprises a single-core ferrule base (9), a single-core flange (10), a single-core connecting nut (11) and a single-core pressing sleeve a (12). One end of the single-core ferrule base (9) has a small hole, and the optical fiber (13) is fixed in the small hole; The single-core flange (10) is sleeved outside the single-core ferrule base (9), and the single-core flange (10) is in interference fit with the outside of the single-core ferrule base (9); the single-core ferrule base (9) and the single-core flange (10) are in key groove fit, so as to prevent the single-core ferrule base (9) from rotating in the single-core flange (10); One end of the single-core ferrule base (9) is externally provided with a rectangular groove, which is used for cooperating with the single-core pressing sleeve a (12) to press the armored empty tube b (21) tightly outside the single-core ferrule base (9); The single-core connecting nut (11) is threadedly connected to the single-core flange (10), and the single-core connecting nut (11) is sleeved outside the single-core pressing sleeve a (12).

6. The lightweight high-reliability fiber optic assembly of claim 5, wherein: The PEEK sheath b (20) is arranged between the armored empty tube b (21) and the optical fiber (13); the armored empty tube b (21) is externally sleeved with the heat shrinkable sleeve g (34) and the heat shrinkable sleeve f (33), and the heat shrinkable sleeve f (33) and the single-core connecting nut (11) are externally sleeved with the heat shrinkable sleeve e (32); The optical fiber (13) is fixed into the small hole of the single-core ferrule base (9) through the 353ND optical fiber adhesive b (36); The inside gap of the single-core ferrule base (9) and the single-core flange (10) is filled with 2651 epoxy resin adhesive b (35); the gap between the single-core ferrule base (9) and the optical fiber (13), the PEEK sheath b (20) and the armored empty tube b (21) is filled with 353ND optical fiber adhesive b (36).

7. A lightweight, high-reliability optical fiber assembly according to claim 1, characterized in that: The optical fiber (13) is selected from a large core diameter, high numerical aperture, radiation-resistant multi-mode optical fiber.

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