Fiber grating assembly

Abstract

The invention belongs to the technical field of fiber bragg gratings, and particularly relates to a fiber bragg grating assembly, which comprises a filtering shell, an optical fiber cable, a light guide shell, an adjustable coupling shell, a filtering assembly, an extinction assembly and a single-pass dimming assembly, and is characterized in that the optical fiber cable is fixedly connected to the outer side of the filtering shell, and the light guide shell sleeves the outer side of the optical fiber cable; the adjustable coupling shell is fixedly connected to the side, away from the light guide shell, of the optical fiber cable, the extinction assembly is installed in the light guide shell, the single-pass dimming assembly is rotationally connected to the interior of the adjustable coupling shell, and the filtering assembly is installed in the filtering shell; light can penetrate through the interior of the refractor body, and the filtered light is scanned on the polarizer of the lens frame, so that light reflection and glare are eliminated, and precise switching of different refractor lenses is completed; a plurality of groups of single-pass optical filters with different optical filter transmission bands are adopted to directly act between a phosphorescent organic light emitter and a phototriode to adjust the optical signal intensity, so that the data transmission efficiency of the optical fiber cable is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of optical fiber grating (FBG), and in particular relates to an optical fiber grating (FBG) component. Background Art

[0002] Fiber Bragg grating is a diffraction grating formed by periodically modulating the refractive index of the fiber core in the axial direction through a certain method. It is a passive filter device. The main method of making fiber Bragg grating is to use the photosensitivity of the optical fiber material to write the incident light coherent field pattern into the fiber core through ultraviolet exposure, and produce periodic changes in the refractive index along the axial direction of the fiber core in the fiber core, thereby forming a permanent spatial phase grating. For uniform fiber Bragg grating, uniform fiber Bragg grating can reflect a certain wavelength of light in the incident light, and the reflection bandwidth is narrow. In the field of sensors, it can be used to make temperature sensors, strain sensors, etc.; in the field of optical communications, it can be used to make devices such as bandpass filters, add-drop multiplexers and demultiplexers of wavelength division multiplexers.

[0003] For example, the Chinese patent with the publication number of "CN213125035U" discloses a fiber Bragg grating assembly, which drives the threaded column to rotate by turning the knob, and drives the first cone block to move under the cooperation of the threaded column and the threaded tube. When the first cone block and the second cone block are separated, the limit rod is pushed to move under the cooperation of the spring, and the clamping block can be pulled to separate the clamping block from the clamping slot, which is convenient for people to disassemble the fixed table carrying the fiber Bragg grating body and then inspect the fiber Bragg grating body. For another example, the Chinese patent with the publication number of "CN220896056U" discloses a fiber Bragg grating temperature adjustment device and a fiber Bragg grating assembly, including a docking part, a threaded part, a first adjustment nut and a second adjustment nut. The above device can ensure that the fiber Bragg grating can be maintained at a higher temperature, so that the fiber Bragg grating can be unaffected by low temperature in a cold environment, thereby ensuring the stability of the fiber Bragg grating mode locking.

[0004] However, the two ends of the fiber Bragg grating are directly connected to the optical fiber cable part and then fixed in use. However, since the grating body is always exposed to the outside, it will still cause deformation of the grating body after being pressed by a heavy object. In addition, due to the influence of ambient temperature, diffraction is formed due to the axial periodic modulation of the refractive index of the optical fiber core, and there is no relevant fill light and shading adjustment effect, so the output wavelength of the fiber Bragg grating is not stable enough.

[0005] Therefore, a fiber grating component is designed to solve the above problems. Summary of the invention

[0006] To solve the problems raised in the above background technology, the present invention provides a fiber grating assembly to solve the problem that the output wavelength of the fiber grating is not stable enough due to the axial periodic modulation of the refractive index of the fiber core, and the related fill light and shading adjustment effects are not provided.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a fiber grating assembly, comprising a filter housing, an optical fiber, a light guide housing, an adjustable coupling housing, a filter assembly, a light extinction assembly and a single-pass dimming assembly, wherein the optical fiber is fixedly connected to the outside of the filter housing, the light guide housing is sleeved on the outside of the optical fiber, the adjustable coupling housing is fixedly connected to a side of the optical fiber away from the light guide housing, the light extinction assembly is installed inside the light guide housing, the single-pass dimming assembly is rotatably connected inside the adjustable coupling housing, and the filter assembly is installed inside the filter housing;

[0008] The filter housing cooperates with the filter component to select the required wavelength from multiple groups of wavelengths and simultaneously transmit multiple optical signals of different wavelengths in the same optical fiber line. The optical fiber line is used for high-speed and long-distance data transmission. The light-guiding housing cooperates with the extinction component to eliminate reflections and glare. The adjustable coupling housing cooperates with the single-pass dimming component to adjust the light sensitivity. The single-pass dimming component is used to receive light and convert it into electrical signals.

[0009] Furthermore, the extinction component includes a refracting mirror body, a frame, a polarizer, a refracting mirror disk, a snap-on disk and a refracting mirror lens, the frame is arranged at the bottom of the light guide shell, the polarizer is fixedly connected to one side of the top of the frame, the refracting mirror disk is arranged below the refracting mirror body and snap-on to the inner wall surface of the light guide shell, the snap-on disk is slidably snap-on to the middle part of the refracting mirror disk, and the refracting mirror lens is fixedly connected to the raised end surface of the snap-on disk.

[0010] Furthermore, the single-pass dimming component includes a transparent conductive oxide film, a phosphorescent organic light emitting device, a photosensitive transistor, a variable resistor and an optical signal adjustment component, wherein the transparent conductive oxide film is fixedly connected to both sides of the interior of the adjustable coupling housing, the phosphorescent organic light emitting device is installed at the upper end of the photosensitive transistor, the variable resistor is welded to the output end of the photosensitive transistor through a lead, and the optical signal adjustment component is rotatably connected to the interior of the adjustable coupling housing.

[0011] Furthermore, the variable resistor includes a resistor housing, a sliding shaft, a moving contact piece, a fixed piece and a carbon film, the carbon film is installed inside the resistor housing for contacting the fixed piece, the fixed piece is installed on the outside of the resistor housing, the outside of the sliding shaft is fixedly connected to the moving contact piece, and the moving contact piece is slidably connected to the outside of the carbon film for changing the contact area to change the resistance value.

[0012] Furthermore, the optical signal adjustment component includes a supporting base, a rotating bracket, a small motor and a single-pass filter. The supporting base is installed inside the adjustable coupling housing, the rotating bracket is rotatably connected to the middle of the supporting base, the motor shaft of the small motor is fixedly connected to one end of the rotating bracket through a coupling, and the single-pass filter is installed on the outside of the rotating bracket.

[0013] Furthermore, the filter assembly includes a nanocrystalline soft magnetic alloy core and an external coil, wherein the nanocrystalline soft magnetic alloy core is fixedly connected to the inner side of the bottom of the filter housing, and the external coil is sleeved on the outside of the nanocrystalline soft magnetic alloy core.

[0014] Furthermore, a small motor 2, a finely polished plate, a fixed block, a positioning rod, a tension spring and a silicone rubber plate are also provided on the opposite side of the transparent conductive oxide film. The small motor 2 is installed on the outside of the fixed block, the fixed block is fixedly connected to the inside of the adjustable coupling housing, the positioning rod is installed on one side of the silicone rubber plate, the tension spring is fixedly connected to the opposite side of the positioning rod and the fixed block, and the finely polished plate is installed on the outside of the output end of the small motor 2.

[0015] Furthermore, a wear-resistant plate is adhesively connected to the inner side of the silicone rubber plate.

[0016] Furthermore, a toggle ring is provided on the outer side of the light guide housing.

[0017] Furthermore, the single-pass optical filters are provided in four groups, and the four groups of single-pass optical filters are arranged in an annular array on the top of the rotating bracket.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In the present invention, light can penetrate the interior of the refractor body and the filtered light is scanned on the polarizer of the frame, thereby eliminating reflections and glare, so that the refractor body can push the snap-on disk to rotate along the middle of the refractor disk at a reduced speed, thereby completing the precise switching of different refractor lenses.

[0020] 2. In the present invention, the nanocrystalline soft magnetic alloy core is fixed on the inner surface of the filter housing. Since two coils with the same number of turns are wound around the outside of the two groups of nanocrystalline soft magnetic alloy cores, the polarities of the coil input and output wires are exactly the same, that is, the same side and the same polarity, thereby achieving the effect of harmonic filtering.

[0021] 3. In the present invention, the device uses multiple sets of single-pass filters with different filter transmission bands to directly act between the phosphorescent organic light emitting device and the photosensitive transistor, thereby adjusting the light signal intensity emitted by the phosphorescent organic light emitting device, thereby improving the data transmission efficiency of the optical fiber line. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 It is a side view of the filter housing in the present invention;

[0025] Figure 3 It is a structural schematic diagram of the filter assembly in the present invention;

[0026] Figure 4 It is a structural schematic diagram of the matting component in the present invention;

[0027] Figure 5 It is a structural schematic diagram of a single-pass dimming component in the present invention;

[0028] Figure 6 is a distribution diagram of the transparent conductive oxide film in the present invention;

[0029] Figure 7 Schematic diagram of the structure of the silicone rubber sheet in the present invention;

[0030] Figure 8 It is a structural schematic diagram of the optical signal conditioning component in the present invention;

[0031] Fig. 9 is an enlarged view of the light guide housing in the present invention;

[0032] Fig.10 It is a structural schematic diagram of a cross section of a variable resistor in the present invention.

[0033] In the figure: 1. filter housing; 2. optical fiber line; 3. light guide housing; 4. adjustable coupling housing; 5. filter assembly; 51. nanocrystalline soft magnetic alloy core; 52. external coil; 6. extinction assembly; 61. refractor body; 62. mirror frame; 63. polarizer; 64. refractor disk; 65. snap-on disk; 66. refractor lens; 7. single-pass dimming assembly; 71. transparent conductive oxide film; 72. phosphorescent organic light emitter; 73. phototransistor; 74 , variable resistor; 741, resistor housing; 742, sliding shaft; 743, moving contact piece; 744, fixed piece; 745, carbon film; 75, optical signal adjustment component; 751, supporting base; 752, rotating bracket; 753, small motor one; 754, single-pass filter; 8, small motor two; 9, fine-polished plate; 10, fixed block; 11, positioning rod; 12, tension spring; 13, silicone rubber plate; 14, wear-resistant plate; 15, toggle ring. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0035] like Figure 1-Figure 2 A fiber grating assembly is shown: comprising a filter housing 1, an optical fiber 2, a light guide housing 3, an adjustable coupling housing 4, a filter assembly 5, an extinction assembly 6 and a single-pass dimming assembly 7, wherein the optical fiber 2 is fixedly connected to the outside of the filter housing 1, the light guide housing 3 is sleeved on the outside of the optical fiber 2, the adjustable coupling housing 4 is fixedly connected to the side of the optical fiber 2 away from the light guide housing 3, the extinction assembly 6 is installed inside the light guide housing 3, the single-pass dimming assembly 7 is rotatably connected inside the adjustable coupling housing 4, and the filter assembly 5 is installed inside the filter housing 1; the filter housing 1 cooperates with the filter assembly 5 to select a desired wavelength from multiple groups of wavelengths and simultaneously transmit multiple optical signals of different wavelengths in the same optical fiber, the optical fiber 2 is used for high-speed and long-distance data transmission, the light guide housing 3 cooperates with the extinction assembly 6 to eliminate reflection and glare, the adjustable coupling housing 4 cooperates with the single-pass dimming assembly 7 to adjust the light sensitivity, and the single-pass dimming assembly 7 is used to receive and convert light into electrical signals.

[0036] The optical fiber line 2 in the device is a fiber made of high-strength glass and plastic. The optical fiber line 2 can be used for two-way, serial data communication between servers, massive storage sub-networks, and peripherals through hubs, switches, and point-to-point connections, so that the device can replace traditional copper cables or coaxial cables to achieve longer distances and higher speed signal transmission.

[0037] Light can penetrate the interior of the refractor body 61 and the filtered light is scanned on the polarizer 63 of the frame 62, thereby eliminating reflections and glare, so that the refractor body 61 can push the clamping disk 65 to rotate along the middle of the refractor disk 64 at a reduced speed, thereby completing the precise switching of different refractor lenses 66, and fixing the nanocrystalline soft magnetic alloy core 51 on the inner surface of the filter housing 1. Since the two groups of nanocrystalline soft magnetic alloy cores 51 are respectively wound with two coils of the same number of turns on the outside, the polarities of the coil inlet and outlet lines are exactly the same, that is, the same side and the same polarity, thereby achieving the effect of harmonic filtering, and the device uses multiple groups of single-pass filters 754 with different filter transmission bands to directly act between the phosphorescent organic light emitting device 72 and the photosensitive triode 73, thereby adjusting the light signal intensity of the light emitted by the phosphorescent organic light emitting device 72, thereby improving the data transmission efficiency of the optical fiber line 2.

[0038] like Figure 3 - Fig.10As shown, the extinction component 6 includes a refractor body 61, a frame 62, a polarizer 63, a refractor disk 64, a snap-on disk 65 and a refractor lens 66. The frame 62 is arranged at the bottom of the light guide housing 3, the polarizer 63 is fixedly connected to one side of the top of the frame 62, the refractor disk 64 is arranged below the refractor body 61 and snap-on to the inner wall surface of the light guide housing 3, the snap-on disk 65 is slidably snap-on to the middle of the refractor disk 64, and the refractor lens 66 is fixedly connected to the raised end surface of the snap-on disk 65.

[0039] The single-pass dimming component 7 includes a transparent conductive oxide film 71, a phosphorescent organic light emitting device 72, a phototransistor 73, a variable resistor 74 and an optical signal adjustment component 75. The transparent conductive oxide film 71 is fixedly connected to both sides of the inside of the adjustable coupling housing 4, the phosphorescent organic light emitting device 72 is installed at the upper end of the phototransistor 73, the variable resistor 74 is welded to the output end of the phototransistor 73 through a lead, and the optical signal adjustment component 75 is rotatably connected to the inside of the adjustable coupling housing 4.

[0040] Phosphorescent organic light-emitting diodes have high efficiency, high brightness and adjustable colors for the light-emitting part. The phototransistor 73 converts the light signal into an electrical signal, and the variable resistor 74 can adjust the electrical signal by changing the resistance. In specific operation, the sliding shaft 742 can be rotated by the control end, and the sliding shaft 742 drives the moving contact piece 743 to rotate along the surface of the carbon film 745 to maintain good electrical contact with the carbon film 745. When the moving contact piece 743 moves on the carbon film 745, it will change the resistance value in the circuit, thereby realizing the control or regulation of the circuit, thereby directly adjusting the intensity of the light signal. The phototransistor 73 can convert the light signal into a current or voltage signal. When light irradiates the base of the phototransistor 73, it will cause a photocurrent, which will enter the emitter from the base, thereby obtaining a signal current amplified by β times in the collector circuit. When light irradiates the base of the phototransistor, the collector current will be controlled by the base circuit and the current, thereby realizing the control function. During operation, the small motor 1 753 at the bottom can be started, and the small motor drives the rotating bracket 752 at the upper end to rotate. According to the light intensity, an appropriate single-pass filter 754 can be selected to control the amount of light passing through and block it in the gap between the phosphorescent organic light emitting device 72 and the photosensitive transistor 73, thereby achieving a direct shading effect and reducing the strength of the electrical signal. When the transparent conductive oxide film 71 is hot, the small motor 2 8 can be automatically started to drive the fine polishing plate 9 to rotate. Since the tension spring 12 located in the middle of the positioning rod 11 and the fixed block 10 is always in In the stretched state, with the support of elasticity, the wear-resistant block and the silicone rubber plate 13 can be pressed against the surface of the fine-polished plate 9, and with the rotation of the fine-polished plate 9, the silicone rubber plate 13 can be in contact with the transparent conductive oxide film 71 in the expanded position. The silicone rubber plate 13 fully conducts heat to the transparent conductive oxide film 71, and its own temperature rises slowly, thereby reducing the overall temperature of the transparent conductive oxide film 71, preventing damage to the phosphorescent organic light emitting device 72 and the phototransistor 73 caused by temperature changes and achieving efficient signal transmission.

[0041] The variable resistor 74 includes a resistor housing 741, a sliding shaft 742, a moving contact piece 743, a fixed piece 744 and a carbon film 745. The carbon film 745 is installed inside the resistor housing 741 to contact the fixed piece 744. The fixed piece 744 is installed on the outside of the resistor housing 741. The outside of the sliding shaft 742 is fixedly connected to the moving contact piece 743. The moving contact piece 743 is slidably connected to the outside of the carbon film 745 to change the contact area and thus change the resistance value.

[0042] The optical signal adjustment component 75 includes a support base 751, a rotating bracket 752, a small motor 753 and a single-pass filter 754. The support base 751 is installed inside the adjustable coupling housing 4. The rotating bracket 752 is rotatably connected to the middle of the support base 751. The motor shaft of the small motor 753 is fixedly connected to one end of the rotating bracket 752 through a coupling. The single-pass filter 754 is installed on the outside of the rotating bracket 752.

[0043] The filter assembly 5 includes a nanocrystalline soft magnetic alloy core 51 and an external coil 52 . The nanocrystalline soft magnetic alloy core 51 is fixedly connected to the inner side of the bottom of the filter housing 1 , and the external coil 52 is sleeved on the outside of the nanocrystalline soft magnetic alloy core 51 .

[0044] When operating the external coil 52 to wind the outside of the nanocrystalline soft magnetic alloy core 51, the wire is evenly wound around the nanocrystalline soft magnetic alloy core 51, and attention is paid to keeping the coil tight and even, and avoiding looseness and crossing. During the winding process, professional winding tools or equipment can be used to improve the winding efficiency and accuracy. After the winding is completed, use appropriate fixing methods, such as tape, heat shrink tubing, etc., to fix the coil on the core to prevent it from loosening or falling off. After combining the wound coil with the nanocrystalline soft magnetic alloy core 51, perform performance tests, including parameters such as inductance, resistance, and loss, to ensure that the performance of the combination meets the design requirements.

[0045] The transparent conductive oxide film 71 in the device is a thin film material with both conductivity and light transmittance. Its high light transmittance and low resistivity help capture more light energy and effectively convert it into electrical energy. It also plays an important role in electromagnetic compatibility, that is, it can reduce electromagnetic interference between electronic devices and improve the stability and reliability of the system. The core of the external coil 52 can be connected to the core wire of the nanocrystalline soft magnetic alloy core 51, and then the electrode layer on the opposite side of the nanocrystalline soft magnetic alloy core 51 is welded to the two sides of the nanocrystalline soft magnetic alloy core 51 by spot soldering and glue dispensing. Then, the top shell of the filter housing 1 is opened, and the nanocrystalline soft magnetic alloy core 51 is fixed to the inner surface of the filter housing. Since the two sets of nanocrystalline soft magnetic alloy cores 51 are respectively wound with two coils of the same number of turns, the polarity of the coil inlet and outlet lines is exactly the same, that is, the same side and the same polarity, thereby achieving the effect of harmonic filtering.

[0046] A small motor 2 8, a fine-polished plate 9, a fixed block 10, a positioning rod 11, a tension spring 12 and a silicone rubber plate 13 are also provided on the opposite side of the transparent conductive oxide film 71. The small motor 2 8 is installed on the outside of the fixed block 10, the fixed block 10 is fixedly connected to the inside of the adjustable coupling housing 4, the positioning rod 11 is installed on one side of the silicone rubber plate 13, the tension spring 12 is fixedly connected to the opposite side of the positioning rod 11 and the fixed block 10, and the fine-polished plate 9 is installed on the outside of the output end of the small motor 2 8.

[0047] The single-pass filter 754 of the present device utilizes the physical and chemical properties of the material. When light waves pass through the filter, only light within the wavelength range that meets the transmission characteristics of the filter can pass smoothly, while light of other wavelengths is blocked or absorbed. By precisely controlling the film thickness and refractive index of the filter, light of a specific wavelength can cause constructive interference between the film layers, thereby enhancing transmission; while light of other wavelengths causes destructive interference, and is blocked or absorbed, thereby achieving precise control and filtering of light.

[0048] A wear-resistant plate 14 is adhesively connected to the inner side of the silicone rubber plate 13 .

[0049] A toggle ring 15 is also provided on the outer side of the light guide housing 3 .

[0050] Four groups of single-pass filters 754 are provided, and the four groups of single-pass filters 754 are arranged in a circular array on the top of the rotating bracket 752 .

[0051] Working principle: The core of the external coil 52 can be connected to the core of the nanocrystalline soft magnetic alloy core 51, and then the electrode layer on the opposite side of the nanocrystalline soft magnetic alloy core 51 is welded to the two sides of the nanocrystalline soft magnetic alloy core 51 by spot soldering and glue dispensing. Then, the top shell of the filter housing 1 is opened, and the nanocrystalline soft magnetic alloy core 51 is fixed to the inner surface of the filter housing. When light is transmitted, the light can penetrate the interior of the refraction mirror body 61 and the filtered light is scanned on the polarizer 63 of the frame 62 to eliminate reflection and glare. At the same time, it can be turned The toggle ring 15 is moved so that the refractor body 61 can push the clamping plate 65 to rotate along the middle of the refractor plate 64 at a reduced speed, thereby completing the precise switching of different refractor lenses 66. The optical signal enters the adjustable coupling housing 4 through the optical fiber line 2, and the sliding shaft 742 is rotated by the control end. The sliding shaft 742 drives the moving contact piece 743 to rotate along the surface of the carbon film 745 to maintain good electrical contact with the carbon film 745. When the moving contact piece 743 moves on the carbon film 745, it will change the resistance value in the circuit, thereby realizing the control or regulation of the circuit, thereby directly adjusting the intensity of the optical signal. During operation, the small motor 753 at the bottom can be started, and the small motor drives the rotating bracket 752 at the upper end to rotate. According to the light intensity, a suitable single-pass filter 754 can be selected to control the amount of light passing through and block it at the gap between the phosphorescent organic light emitting device 72 and the photosensitive triode 73, thereby completing the direct light shielding effect. When the transparent conductive oxide film 71 is hot, the small motor 28 can be automatically started to drive the fine polishing plate 9 to rotate. Since the tension spring 12 located in the middle of the positioning rod 11 and the fixed block 10 is always in a stretched state, the wear-resistant block and the silicone rubber plate 13 can be against the surface of the fine polishing plate 9 under the elastic support, and cooperate with the rotation of the fine polishing plate 9, so that the silicone rubber plate 13 can contact the transparent conductive oxide film 71 in the expanded position. The silicone rubber plate 13 fully conducts heat to the transparent conductive oxide film 71, and its own temperature rises slowly, thereby reducing the overall temperature of the transparent conductive oxide film 71, preventing damage to the phosphorescent organic light emitting device 72 and the phototransistor 73 caused by temperature changes and achieving efficient signal transmission.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fiber Bragg grating assembly, characterized in that: The optical fiber (2) is fixedly connected to the outside of the filter housing (1), the light guide housing (3), an adjustable coupling housing (4), a filtering component (5), a light extinction component (6) and a single-pass dimming component (7), wherein the optical fiber (2) is fixedly connected to the outside of the filter housing (1), the light guide housing (3) is sleeved on the outside of the optical fiber (2), the adjustable coupling housing (4) is fixedly connected to the side of the optical fiber (2) away from the light guide housing (3), the light extinction component (6) is installed inside the light guide housing (3), the single-pass dimming component (7) is rotatably connected inside the adjustable coupling housing (4), and the filtering component (5) is installed inside the filter housing (1); The filter housing (1) cooperates with the filter component (5) to select a desired wavelength from multiple groups of wavelengths and simultaneously transmits multiple optical signals of different wavelengths in the same optical fiber line; the optical fiber line (2) is used for high-speed long-distance data transmission; the light guide housing (3) cooperates with the light extinction component (6) to eliminate reflection and glare; the adjustable coupling housing (4) cooperates with the single-pass dimming component (7) to adjust the light sensitivity; the single-pass dimming component (7) is used to receive light and convert it into an electrical signal.

2. The fiber Bragg grating assembly according to claim 1, characterized in that: The extinction component (6) comprises a refractor body (61), a mirror frame (62), a polarizer (63), a refractor disc (64), a snap-on disc (65) and a refractor lens (66); the mirror frame (62) is arranged at the bottom of the light guide housing (3); the polarizer (63) is fixedly connected to one side of the top of the mirror frame (62); the refractor disc (64) is arranged below the refractor body (61) and snap-on to the inner wall surface of the light guide housing (3); the snap-on disc (65) is slidably snap-on to the middle of the refractor disc (64); and the refractor lens (66) is fixedly connected to the convex end surface of the snap-on disc (65).

3. The fiber Bragg grating assembly according to claim 1, characterized in that: The single-pass dimming component (7) comprises a transparent conductive oxide film (71), a phosphorescent organic light emitting device (72), a photosensitive triode (73), a variable resistor (74) and a light signal regulating component (75); the transparent conductive oxide film (71) is fixedly connected to both sides of the inside of the adjustable coupling housing (4); the phosphorescent organic light emitting device (72) is mounted on the upper end of the photosensitive triode (73); the variable resistor (74) is welded to the output end of the photosensitive triode (73) via a lead wire; and the light signal regulating component (75) is rotatably connected to the inside of the adjustable coupling housing (4).

4. The fiber Bragg grating assembly according to claim 3, characterized in that: The variable resistor (74) comprises a resistor housing (741), a sliding shaft (742), a moving contact piece (743), a fixed piece (744) and a carbon film (745); the carbon film (745) is installed inside the resistor housing (741) to contact the fixed piece (744); the fixed piece (744) is installed on the outside of the resistor housing (741); the outside of the sliding shaft (742) is fixedly connected to the moving contact piece (743); the moving contact piece (743) is slidably connected to the outside of the carbon film (745) to change the contact area and thus change the resistance value.

5. The fiber Bragg grating assembly according to claim 3, characterized in that: The optical signal adjustment component (75) comprises a support base (751), a rotating bracket (752), a small motor (753) and a single-pass filter (754); the support base (751) is installed inside the adjustable coupling housing (4); the rotating bracket (752) is rotatably connected to the middle part of the support base (751); the motor shaft of the small motor (753) is fixedly connected to one end of the rotating bracket (752) via a coupling; and the single-pass filter (754) is installed on the outside of the rotating bracket (752).

6. The fiber Bragg grating assembly according to claim 1, characterized in that: The filter assembly (5) comprises a nanocrystalline soft magnetic alloy core (51) and an external coil (52); the nanocrystalline soft magnetic alloy core (51) is fixedly connected to the inner side of the bottom of the filter housing (1); and the external coil (52) is sleeved on the outside of the nanocrystalline soft magnetic alloy core (51).

7. The fiber Bragg grating assembly according to claim 4, characterized in that: A second small motor (8), a finely polished plate (9), a fixed block (10), a positioning rod (11), a tension spring (12) and a silicone rubber plate (13) are also provided on the opposite side of the transparent conductive oxide film (71); the second small motor (8) is mounted on the outside of the fixed block (10); the fixed block (10) is fixedly connected to the inside of the adjustable coupling housing (4); the positioning rod (11) is mounted on one side of the silicone rubber plate (13); the tension spring (12) is fixedly connected to the opposite side of the positioning rod (11) and the fixed block (10); and the finely polished plate (9) is mounted on the outside of the output end of the second small motor (8).

8. The fiber Bragg grating assembly according to claim 7, characterized in that: The opposite inner side of the silicone rubber plate (13) is also adhesively connected to a wear-resistant plate (14).

9. The fiber Bragg grating assembly according to claim 1, characterized in that: The outer side of the light guide housing (3) is also provided with a toggle ring (15).

10. The fiber Bragg grating assembly according to claim 5, characterized in that: The single-pass optical filters (754) are provided in four groups, and the four groups of single-pass optical filters (754) are arranged in a circular array on the top of the rotating bracket (752).

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