Active optical fiber disc and active optical fiber disc winding structure

Abstract

The application discloses an active optical fiber disc and an active optical fiber disc winding structure, and relates to the technical field of lasers. The active optical fiber disc is provided with a plurality of optical fiber grooves, the optical fiber grooves are used for winding and placing active optical fibers, a bridging channel is arranged in communication between two adjacent optical fiber grooves, the depth of the optical fiber groove is greater than K times of the outer diameter of the active optical fiber, and K is greater than 2. The active optical fiber disc and the active optical fiber disc winding structure can balance heat dissipation and the volume of the optical fiber disc.

Description

Technical Field

[0001] This application relates to the field of laser technology, and more specifically, to an active fiber optic disk and an active fiber optic winding structure. Background Technology

[0002] High-power fiber lasers, with their advantages of high beam quality, high electro-optic conversion efficiency, excellent heat dissipation, and compact structure, have been widely used in industrial manufacturing, medical aesthetics, scientific research, and national defense. In active fiber modules, rare-earth-doped active fibers are the core component for laser amplification. When pump light is injected into the active fiber, rare-earth ions undergo stimulated emission, converting pump energy into laser energy. However, due to quantum defect, most of the unconverted energy is dissipated as heat within the active fiber. Therefore, the heat dissipation performance of the active fiber directly determines the upper limit of the fiber laser's output power, long-term operational stability, and device lifespan. Currently, mainstream high-power fiber lasers utilize metal heat sinks with fiber-coiled channels. Specifically, continuous fiber channels are fabricated on the heat sink to form a single-layer fiber-coiled channel, around which the active fiber is coiled, allowing the heat sink to dissipate heat.

[0003] However, single-layer coiled active fiber is not conducive to the development of lasers towards higher power and smaller size because the total length of the active fiber is positively correlated with the floor space occupied by the coiled area. To meet the power requirements of kilowatt-level lasers, the length of active fiber is typically tens of meters. Under the premise of ensuring a minimum bending radius to avoid microbending loss, single-layer coiling inevitably leads to a sharp increase in heat sink size, and the huge volume severely restricts the miniaturization of the entire laser device. Summary of the Invention

[0004] The purpose of this application is to provide an active fiber optic disk and an active fiber optic winding structure that can achieve a balance between heat dissipation and the volume of the fiber optic disk.

[0005] The embodiments of this application are implemented as follows: In a first aspect of this application, an active optical fiber disk is provided, wherein multiple optical fiber slots are formed on the active optical fiber disk, the optical fiber slots are used to coil and place active optical fibers, and a bridging channel is provided between adjacent two optical fiber slots, the depth of the optical fiber slots is greater than K times the outer diameter of the active optical fiber, and K is greater than 2.

[0006] As one possible implementation, the fiber optic slot includes multiple straight segments and multiple semi-circular arc segments. The multiple straight segments are parallel to each other, and the bridging channel connects two adjacent straight segments of two adjacent loops of fiber optic slots. The bridging channel and the straight segments have a preset angle, which is less than or equal to 30°.

[0007] As one possible implementation method, the multi-turn fiber optic slots are arranged in concentric circular or spiral trajectories.

[0008] As one possible implementation, the depth of the fiber optic slot = the outer diameter of the active fiber * N * M, where N is the number of active fiber layers in the fiber optic slot, M is the redundancy factor, and M is between 1.1 and 1.5.

[0009] As one possible implementation, an oxide layer and a protective layer are formed on the surface of the active optical fiber disk.

[0010] As one possible implementation method, the active fiber optic disk is made of aluminum alloy or oxygen-free copper.

[0011] As one possible implementation, two bridging channels are provided between two adjacent fiber optic slots, and the two bridging channels may cross each other or be independent of each other.

[0012] As one possible implementation, the active fiber optic disk is equipped with a water-cooling channel, through which coolant circulates to dissipate heat from the active fiber optic disk.

[0013] A second aspect of this application provides an active optical fiber coiling structure, including the aforementioned active optical fiber coil, active optical fiber, and heat-conducting structure. The active optical fiber is coiled sequentially in multiple turns of an optical fiber groove, and at least one turn of the optical fiber groove contains multiple layers of active optical fiber. The heat-conducting structure seals the optical fiber groove.

[0014] As one possible implementation method, the thermally conductive structure is thermally conductive adhesive or thermally conductive pressure strip.

[0015] The beneficial effects of the embodiments of this application include: The active fiber optic disk provided in this embodiment has multiple fiber slots for coiling and placing active optical fibers. A bridging channel connects adjacent fiber slots. The width of the fiber slots matches the fiber width. The fiber is coiled sequentially within the multiple fiber slots. The depth of the fiber slots is greater than K times the outer diameter of the active optical fiber, where K is greater than 2. This allows for the coiling of multiple layers of active optical fiber within the fiber slots, effectively stacking multiple layers upwards within the slots. This transforms the previously large-area planar coiling into a three-dimensional coiling. Within the same floor space, the length that the active fiber optic disk can accommodate is increased exponentially; or, while accommodating the same length of active optical fiber, the area of ​​the active fiber optic disk is significantly reduced. The heat generated by the active optical fiber is laterally conducted through the sidewalls of the fiber slots to the large-area active fiber optic disk, and finally dissipated into the environment by the active optical fiber, achieving heat dissipation for high-power active optical fibers. This resolves the contradiction between high power and miniaturization, achieving a balance between heat dissipation and the volume of the active fiber optic disk. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is one of the structural schematic diagrams of the active optical fiber winding structure provided in the embodiments of this application; Figure 2 A second schematic diagram of the active optical fiber winding structure provided in the embodiments of this application; Figure 3 A cross-sectional schematic diagram of the active optical fiber winding structure provided in the embodiments of this application.

[0018] Icons: 110 - Active fiber optic tray; 111 - Fiber optic slot; 113 - Bridging channel; 120 - Active fiber optic cable; 130 - Thermal conductive structure. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only some embodiments of this application, not all embodiments. Similar reference numerals and letters in the following drawings indicate similar items. Once an item is defined in one drawing, it does not need to be further defined in other drawings.

[0020] The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and should not be construed as limiting this application. The terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] Unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to connections within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0022] Please refer to the reference. Figure 1 , Figure 2 and Figure 3This application provides an active fiber optic disk 110, which has multiple fiber optic slots 111. The fiber optic slots 111 are used to coil and place active optical fibers. A bridging channel 113 is provided between two adjacent fiber optic slots 111. The width of the fiber optic slots 111 matches the active optical fiber 120. The depth of the fiber optic slots 111 is greater than K times that of the active optical fiber 120, where K is greater than 2.

[0023] The active fiber disk 110 of this application embodiment is used in an active laser. The active laser includes a pump source, an active fiber 120, and the active fiber disk 110. The pump source is connected to the active fiber 120. The seed light emitted from the pump source is transmitted in the active fiber 120. During the transmission process, the high-energy rare earth ions in the active fiber 120 are excited, causing the active fiber 120 to release new photons, thereby amplifying the seed light. The wavelength, phase, direction, and polarization state of the new photons are consistent with those of the seed light.

[0024] Specifically, the active fiber optic disk 110 provided in this application embodiment has multiple loops of fiber optic slots 111 on its surface. These slots are arranged concentrically or spirally, connected sequentially from the inside out. Adjacent loops of fiber optic slots 111 are connected by a bridging channel 113. When the active fiber optic cable 120 is sequentially wound within the multiple loops of fiber optic slots 111, a length of tens of meters of active fiber optic cable 120 can transition from one fiber optic slot 111 to an adjacent slot along the bridging channel. The width of the fiber optic slot 111 matches the diameter of the active fiber optic cable 120, serving as a physical limit and guide to prevent the active fiber optic cable 120 from stacking haphazardly within the fiber optic slot 111. The depth of the fiber optic slot 111 is greater than K times the outer diameter of the active fiber, where K is greater than 2, allowing multiple layers of active fiber 120 to be coiled inside the fiber optic slot 111. That is, within the limited space of the fiber optic slot 111, multiple layers of active fiber 120 are stacked vertically. In addition, the active fiber 120 is in contact with the sidewall of the fiber optic slot 111, and the heat generated by the active fiber 120 is conducted to the main body of the active fiber disk 110 through the sidewall of the fiber optic slot for heat dissipation.

[0025] Specifically, when the active optical fiber 120 is wound onto the active optical fiber spool 110, the active optical fiber 120 enters the innermost (or outermost) fiber slot 111 from the starting end and is wound along the matching slot width. When the fiber slot 111 is filled or reaches the preset number of layers, it enters the adjacent fiber slot 111 through the bridging channel 113, and so on, until the entire active optical fiber 120 is wound.

[0026] During the winding process, the depth of the fiber groove 111 is greater than K times the outer diameter of the active fiber 120, and K is greater than 2. This allows multiple layers of active fiber 120 to be wound within the fiber groove 111, meaning the active fiber 120 is stacked upwards in multiple layers within the fiber groove 111. This transforms the previously large-area planar winding into a three-dimensional winding. With the same floor space, the length of active fiber 120 that can be accommodated is increased exponentially; or, while accommodating the same length of active fiber 120, the area of ​​the active fiber disk 110 is significantly reduced. When the high-power laser operates, the active fiber 120 generates waste heat. The active fiber 120 contacts the sidewall of the fiber groove 111, and the heat is rapidly conducted from the surface of the active fiber 120 to the large-area active fiber disk 110, ultimately dissipating into the environment. This achieves heat dissipation for the high-power active fiber 120, resolving the contradiction between high power and miniaturization, thus achieving a balance between heat dissipation and the volume of the active fiber disk 110.

[0027] Optional, such as Figure 1 , Figure 2 and Figure 3 As shown, the fiber optic slot 111 includes multiple straight segments and multiple semi-circular arc segments. The bridging channel 113 connects two adjacent straight segments of two adjacent loops of fiber optic slot 111, and the bridging channel 113 and the straight segments have a preset angle, which is less than 30°.

[0028] In this embodiment, each fiber optic groove 111 includes two straight segments extending from a straight line and a semi-circular arc segment connecting the two straight segments on the same side. The bridging channel 113 connects two adjacent straight segments of two adjacent fiber optic grooves 111 to connect the two adjacent fiber optic grooves 111.

[0029] A preset angle is formed between the bridging channel 113 and the straight section of the fiber optic slot 111, and this preset angle is limited to within 30°. When the active fiber 120 transitions from one fiber optic slot 111 to the next, the active fiber 120 slides into the adjacent fiber optic slot 111 at a gentle angle along the bridging channel 113, which has a preset angle of less than 30°. In this way, the change in curvature of the active fiber 120 when passing through the bridging channel 113 is minimal, greatly mitigating the bending stress during the layer transition of the active fiber 120. This ensures that the bending radius of the active fiber 120 in the transition section is always greater than the safety threshold, preventing bending loss at the bridging channel 113 and thus ensuring stable output of the high-power laser.

[0030] In addition, the smooth bridging channel 113 avoids excessive mechanical stress on the active optical fiber 120 in certain areas. Under long-term high-power heating and vibration environments, the smooth geometry can effectively prevent the active optical fiber 120 from developing dark lines or breaking due to stress fatigue, significantly improving the reliability and service life of the active optical fiber 120.

[0031] The specific shape of the fiber optic groove 111 is not limited in this embodiment of the application, as long as it has a straight line. For example, it can be a racetrack shape, an ellipse, or a polygonal design with a straight line cut edge.

[0032] In addition, to ensure that the active optical fiber 120 is free from additional stress, the minimum radius of the fiber slot 111 is 150 to 200 times the outer diameter of the active optical fiber 120.

[0033] In practical applications, the length of the bridging channel 113 can be 2.2-2.5 times the distance between the two straight segments it connects.

[0034] The distance between two straight segments refers to the physical radial spacing between the straight segments of two adjacent fiber optic slots 111. The actual physical length of the bridging channel 113 is between 2.2 and 2.5 times the aforementioned reference distance. When the active fiber 120 enters the bridging channel 113 from the current straight segment, since the bridging channel 113 is 2.2-2.5 times the span, the active fiber 120 will extend towards the adjacent straight segment at a gentle angle.

[0035] As can be seen from the foregoing, the active optical fiber 120 is used to connect to the pump source. When the pump source is a unidirectional pump source, the bridging channel 113 is located at the end of the active optical fiber 120 in the fiber optic slot 111; when the pump source is a bidirectional pump source, the bridging channel 113 is located at the middle of the active optical fiber 120 in the fiber optic slot 111.

[0036] In existing fiber optic trays, the fiber slots 111 are closed-loop structures, making it impossible to flexibly adjust their layout according to the pump source's pumping scheme. In unidirectional pumped lasers, the active fiber 120 at the injection end of the pump source has the highest temperature, while the end has the lowest. In bidirectional pumped lasers, the middle section of the active fiber 120 has the lowest temperature. To avoid the bridging channel 113 becoming a heat dissipation bottleneck, this embodiment sets the position of the bridging channel 113 according to the pump source. Specifically, when the pump source is unidirectional, the seed light emitted from the pump source is injected from one end of the active fiber 120. The temperature of the active fiber 120 at the injection end is the highest, gradually decreasing along its length, with the lowest temperature at the end. Therefore, the bridging channel 113 is placed near the end of the active fiber 120 within the fiber slot 111 on a straight section, utilizing the low-temperature region at the end to achieve interlayer transition of the active fiber 120 and prevent the bridging point from becoming a heat dissipation bottleneck.

[0037] When the pump source is a bidirectional pump source, the pump light is injected from both ends of the active fiber 120. The temperature of the active fiber 120 is lowest in the middle section and highest at both ends. Therefore, the bridging channel 113 is set in the middle section of the active fiber 120 within the fiber groove 111 in the straight section, using the low temperature region in the middle section to achieve interlayer transition and ensure heat dissipation performance at the bridging point.

[0038] It is understood that those skilled in the art can also set the bridging channel 113 at any position on the straight segment according to actual heat dissipation requirements.

[0039] Optional, such as Figure 1 and Figure 2 As shown, the multi-turn fiber optic slots 111 follow a concentric circular or helical trajectory. Specifically, Figure 1 The multi-loop fiber optic slot 111 in the middle has a concentric circular trajectory. At this time, the centers of all the arc segments are located on the same straight line, and the straight line is parallel to the straight line segment. Figure 2 The multi-turn fiber optic slots in the structure follow a spiral trajectory, and at this time, the centers of the arc segments on the same side are located on the same straight line.

[0040] As an feasible approach, such as Figure 3 As shown, the width of the fiber optic slot 111 matches the outer diameter of the active fiber 120, and the depth of the fiber optic slot 111 = the outer diameter of the active fiber 120 * N * M, where N is the number of active fiber 120 layers in the fiber optic slot 111, M is the redundancy coefficient, and M is between 1.1 and 1.5.

[0041] The width of the fiber optic slot 111 matches the diameter of the active fiber 120, meaning the width of the slot 111 is set to accommodate only a single active fiber 120 or slightly larger than its diameter. This horizontal width physically limits and guides the active fiber 120, preventing it from sliding laterally, crossing, or stacking haphazardly within the slot. After entering the slot 111, the active fiber 120, limited by the matching slot width, can only be laid out in a single row along the slot's trajectory, ensuring that each layer of active fiber 120 is neatly arranged. Once one layer of active fiber 120 is filled in the slot, it begins to stack upwards. Because the slot depth includes a small redundancy factor M, when the active fiber 120 is stacked to N layers vertically, a certain safety gap is maintained between the top and the slot opening, and multiple active fibers 120 are tightly fitted together.

[0042] In this embodiment, the number of active optical fibers 120 within the fiber optic slot 111 is not limited. Those skilled in the art can flexibly set the number according to actual conditions. The number of active optical fibers 120 within each fiber optic slot 111 can be the same or different. For example, ... Figure 3As shown, in order to achieve better heat dissipation, a single layer of active optical fiber 120 can be set in the high power area and a multi-layer active optical fiber 120 can be set in the low power area to balance heat dissipation and volume.

[0043] Optionally, the surface of the active fiber optic disk 110 is formed with an oxide layer and a protective layer.

[0044] Specifically, the active fiber optic disc 110 can be made of a metal with high thermal conductivity, such as 6061-T6 aluminum alloy, oxygen-free copper, etc. Anodizing is performed on the surface of the active fiber optic disc 110 to form a dense oxide film as an oxide layer. This oxide layer is tightly bonded to the substrate and possesses excellent insulation, corrosion resistance, and a certain degree of hardness.

[0045] A thin film of nickel metal is deposited on top of the oxide layer through electroplating or electroless plating to form a protective layer. As the outermost physical protection and functional barrier, the protective layer can improve the thermal conductivity and corrosion resistance of the active fiber optic disc 110.

[0046] In practical applications, the distance between the fiber optic slot 111 and the pump source is inversely proportional to the spacing between two adjacent fiber optic slots 111. That is, the greater the distance from a certain fiber optic slot 111 to the external pump source, the smaller the distance between this fiber optic slot 111 and its adjacent fiber optic slots 111.

[0047] As mentioned above, the temperature of the active optical fiber 120 is higher the closer it is to the pump source. That is, the smaller the distance between the fiber slot 111 and the external pump source, the higher the temperature. In this case, the distance between the fiber slot 111 and its adjacent fiber slots 111 should be set smaller to facilitate better heat dissipation.

[0048] As an feasible approach, such as Figure 2 As shown, there are two bridging channels 113 between two adjacent fiber optic slots 111, and the two bridging channels 113 may cross each other or be independent of each other.

[0049] Optionally, the active fiber optic disk 110 is provided with a water-cooling channel, through which coolant circulates to dissipate heat from the active fiber optic disk 110.

[0050] The coolant inside the water-cooled channel exchanges heat with the active fiber optic disk 110 during its flow, which can quickly remove the heat from the active fiber optic disk 110 and achieve rapid heat dissipation.

[0051] The embodiments of this application do not limit the arrangement of water cooling channels or the specific materials of the coolant. Those skilled in the art can make the arrangement according to the actual situation. For example, water cooling channels can be denser in locations with high heat.

[0052] A second aspect of this application provides an active optical fiber coiling structure, including the aforementioned active optical fiber coil 110, active optical fiber 120, and a heat-conducting structure 130. The active optical fiber 120 is sequentially coiled within multiple turns of an optical fiber groove 111, with at least one turn of the optical fiber groove 111 containing multiple layers of active optical fiber 120. The heat-conducting structure 130 seals the optical fiber groove 111. The heat-conducting structure 130 seals the optical fiber groove 111, causing the outer wall of the active optical fiber 120 to contact the heat-conducting structure 130. Heat generated on the active optical fiber 120 is rapidly conducted to the sidewall of the optical fiber groove 111 through the heat-conducting structure 130, thereby achieving rapid heat dissipation.

[0053] Optionally, the thermally conductive structure 130 is thermally conductive adhesive or thermally conductive strip.

[0054] When the thermally conductive structure 130 is made of thermally conductive adhesive, a thermally conductive adhesive with high thermal conductivity can be selected to quickly transfer heat from the active optical fiber 120 to the active optical fiber disk 110. Specifically, it can be thermally conductive silicone grease, epoxy thermally conductive adhesive, etc., with a thermal conductivity greater than or equal to 2 W / (m²). K). The thermally conductive adhesive can fill the gap between the active optical fiber 120 and the fiber optic slot 111, thereby ensuring that all layers of active optical fibers 120 are tightly bonded to the slot wall and bottom, maximizing the heat dissipation contact area and achieving efficient heat dissipation. For example, after the thermally conductive adhesive is filled, the gap between the active optical fiber 120 and the fiber optic slot 111 wall is ≤0.05mm, maximizing the heat conduction efficiency.

[0055] In addition, when the heat-conducting structure 130 is a heat-conducting pressure strip, a tight fit is formed between the heat-conducting pressure strip and the groove wall, which improves the heat conduction efficiency and is suitable for industrial lasers with high vibration and high reliability requirements.

[0056] The beneficial effects of the embodiments of this application are as follows: Reducing the area of ​​the active fiber optic disk 110 enables miniaturization of the laser. Under the premise of the same active fiber length (120mm) and the same fiber coil radius, the fiber coil area in this embodiment is inversely proportional to the number of fiber coil layers (N): taking a 2-layer fiber coil as an example, the fiber coil area can be compressed to 40%~50% of that of a single-layer fiber coil. Specifically, taking a 20m active fiber (120mm) and a 100mm fiber coil radius as an example, the area of ​​a single-layer fiber coil is approximately 300mm × 200mm = 60000mm², and the area of ​​a 2-layer fiber coil can be compressed to 180mm × 150mm = 27000mm², a compression ratio of 55%; taking a 3-layer fiber coil as an example, the fiber coil area can be compressed to 25%~30% of that of a single-layer fiber coil, significantly reducing the space occupied by the heat sink and providing support for the miniaturization design of the entire laser device.

[0057] When the area of ​​the active fiber optic tray 110 is reduced, the amount of raw materials used in the active fiber optic tray 110 is reduced by 40% to 60%, significantly lowering costs. Furthermore, compared to single-layer trays, the processing technology for the fiber optic groove 111 of multi-layer trays only requires adjusting the groove depth and bridging channel 113, without requiring additional processing equipment, resulting in no significant increase in processing costs. The continuous fiber path during assembly only adds transition operations at the bridging points, improving assembly efficiency by 10% to 15%.

[0058] Good heat dissipation performance By increasing the depth of the fiber groove 111 and filling it with the thermally conductive structure 130, the multilayer active fiber 120 is made to fit tightly with the heat sink, and the heat dissipation performance is comparable to that of a single-layer fiber optic coil. Experimental data verification: Taking a 20m 20 / 400μm ytterbium-doped active fiber 120 and an output power of 1kW as an example, the highest temperature of the single-layer fiber optic coil active fiber 120 is 65℃, while the highest temperature of the active fiber 120 in the two-layer fiber optic coil module of this application is 68℃, an increase of only 3℃. The heat dissipation performance meets the requirements for high-power lasers.

[0059] The above description is merely an optional embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0060] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.

Claims

1. An active fiber optic disk, characterized in that, The active fiber optic disc has multiple fiber optic slots, which are used to coil and place the active fiber optic cable. A bridging channel is provided between two adjacent fiber optic slots. The depth of the fiber optic slot is greater than K times the outer diameter of the active fiber optic cable, where K is greater than 2.

2. The active fiber optic disk according to claim 1, characterized in that, The fiber optic slot includes multiple straight segments and multiple semi-circular arc segments. The multiple straight segments are parallel to each other. The bridging channel connects two adjacent straight segments of two adjacent fiber optic slots. The bridging channel and the straight segments have a preset angle, which is less than or equal to 30°.

3. The active fiber optic disk according to claim 2, characterized in that, The fiber optic slots described in multiple turns are either concentric circles or spirals.

4. The active fiber optic disk according to claim 1, characterized in that, The depth of the fiber optic slot is equal to the outer diameter of the active fiber * N * M, where N is the number of active fiber layers in the fiber optic slot, M is the redundancy factor, and M is between 1.1 and 1.

5.

5. The active fiber optic disk according to claim 1, characterized in that, The surface of the active optical fiber disk is formed with an oxide layer and a protective layer.

6. The active fiber optic disk according to claim 1, characterized in that, The active fiber optic disk is made of aluminum alloy or oxygen-free copper.

7. The active fiber optic disk according to claim 2, characterized in that, There are two bridging channels between two adjacent optical fiber slots, and the two bridging channels may cross each other or be independent of each other.

8. The active fiber optic disk according to claim 1, characterized in that, The active fiber optic disk is equipped with a water-cooling channel, through which coolant circulates to dissipate heat from the active fiber optic disk.

9. An active optical fiber coiled structure, characterized in that, The active optical fiber winding structure includes the active optical fiber disk as described in any one of claims 1-8, and further includes an active optical fiber and a heat-conducting structure. The active optical fiber is wound sequentially in multiple turns of the optical fiber groove, and at least one turn of the optical fiber groove contains multiple layers of the active optical fiber. The heat-conducting structure seals the optical fiber groove.

10. The optical fiber winding structure according to claim 9, characterized in that, The thermally conductive structure is thermally conductive adhesive or thermally conductive pressure strip.

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