Optical isolator with efficient heat dissipation structure

Abstract

The invention relates to the technical field of optical isolators, and particularly discloses an optical isolator with a high-efficiency heat dissipation structure, and the optical isolator comprises a liquid cooling channel which is disposed between an outer housing and an inner housing, and the liquid cooling channel comprises a first channel and a second channel; the first connector is installed on the shell, the first connector is connected with the first flow channel, the first connector comprises a first liquid inlet pipe and a first liquid outlet pipe, and the first liquid inlet pipe and the first liquid outlet pipe are communicated with the two ends of the first flow channel respectively; the shell is provided with a first connector and a second connector, the second connector is installed on the shell and connected with the second flow channel, the second connector comprises a second liquid inlet pipe and a second liquid outlet pipe, and the second liquid inlet pipe and the second liquid outlet pipe are communicated with the two ends of the second flow channel respectively. According to the optical isolator assembly, the bidirectional flow channel is arranged, and the liquid inlet ends of the cooling liquid are located at the two ends, so that the two strands of cooling liquid can complement each other during flowing, the heat dissipation of the optical isolator assembly is uniform, and the influence of uneven heat dissipation on the performance of the optical isolator assembly is effectively avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical isolators, in particular to an optical isolator with high-efficiency heat dissipation structure. BACKGROUND

[0002] An optical isolator, also known as a Faraday isolator, is composed of an input polarizer, a Faraday rotator with a magnet, and an output polarizer. It is a passive device that allows light to pass in one direction while blocking the return light in the optical path, enabling unidirectional transmission of light. With the rapid development of high-power fiber laser technology, the power level of fiber lasers is becoming increasingly high. As an important passive optical device for effectively protecting the normal operation of fiber lasers, the demand for the power level of the isolator is also increasing. However, due to the constraints of the crystal material absorption characteristics of the isolator, the crystal absorption will accumulate heat at high power, affecting the performance of the isolator.

[0003] To solve the above technical problems, the applicant has searched some existing technologies, such as a high-power optical isolator with patent publication number CN220894685U. The main technical means is that the second mounting hole and the mounting flange cooperate to provide stable assembly for the mounting bracket and the optical isolator component assembly. The third liquid cooling channel can absorb the waste heat of the optical isolator component assembly, and the magnet can conduct the waste heat through the first liquid cooling channel, and then through the connection of the second liquid cooling channel, forming an integrated heat dissipation for the optical isolator component assembly and the magnet, thereby efficiently conducting the waste heat out to improve the output performance and working stability of the device. After the applicant's analysis, the disadvantages of this technical solution are: in the above scheme, the cooling liquid flows through the first liquid cooling channel to absorb the heat of the optical isolator assembly. This will cause the temperature of the cooling liquid to increase as it flows, and its heat absorption capacity will gradually decrease, resulting in strong heat dissipation near the inlet end of the cooling liquid and weak heat dissipation near the outlet end of the cooling liquid, leading to uneven heat dissipation and affecting the performance of the isolator. SUMMARY

[0004] The present application aims to solve the technical problems of the prior art, such as the inability of the cooling liquid to absorb heat uniformly when flowing, resulting in uneven heat dissipation and affecting the performance of the isolator.

[0005] The purpose of the present application can be achieved by the following technical solutions: An optical isolator with high-efficiency heat dissipation structure, comprising an outer shell, an inner shell, a plug, a magnet, and an optical isolator assembly, the optical isolator further comprising: A liquid cooling channel is provided between the outer shell and the inner shell, the liquid cooling channel comprises a channel one and a channel two, the channel one and the channel two are both spiral-shaped, and the channel one and the channel two are arranged alternately. Joint one, the outer shell is installed with joint one, joint one is connected with flow channel one, joint one includes liquid inlet pipe one and liquid outlet pipe one, liquid inlet pipe one and liquid outlet pipe one are communicated with two ends of flow channel one respectively; Joint two, the outer shell is installed with joint two, joint two is connected with flow channel two, joint two includes liquid inlet pipe two and liquid outlet pipe two, liquid inlet pipe two and liquid outlet pipe two are communicated with two ends of flow channel two respectively; The liquid inlet pipe one and liquid outlet pipe two are located on the same side, the liquid inlet pipe two and liquid outlet pipe one are located on the same side.

[0006] As the preferred technical solution, the flow channel one and the flow channel two are provided with adjusting assemblies, the adjusting assemblies include a plurality of movable plates, adjacent two movable plates are attached together, the plurality of movable plates are in spiral shape, the movable plates are provided with two ear plates, the two ear plates are respectively attached to the opposite two inner walls of the liquid cooling flow channel, the ear plates are provided with a support plate, a plurality of guide grooves are formed in the inner shell, the support plate is slidingly installed in the guide grooves, the plurality of movable plates move along the depth direction of the liquid cooling flow channel by moving in the guide grooves through the support plate.

[0007] As the preferred technical solution, the adjusting assembly further includes a driving member, the driving member includes a tooth plate one, a gear and a tooth plate two, a plurality of movable grooves and a plurality of pressing grooves are formed in the inner shell, the guide grooves and the pressing grooves are communicated with the movable grooves, the tooth plate one is fixed on the support plate, the gear is elastically rotatably installed in the movable groove, the gear is engaged with the tooth plate one, the other side of the gear is engaged with the tooth plate two, the tooth plate two extends into the pressing groove, the end of the tooth plate two is provided with a pressing plate, the pressing plate is located in the pressing groove, the surface of the inner shell along the edges of the flow channel one and the flow channel two is provided with an extension plate, a plurality of air bags are arranged on the side surface of the extension plate, the air bags abut against the pressing plate.

[0008] As the preferred technical solution, a plurality of embedding grooves and rotating grooves are formed in the ear plate, the rotating grooves are communicated with the embedding grooves, a heat dissipation assembly is installed in the embedding grooves and the rotating grooves, the heat dissipation assembly includes a heat dissipation plate and a rotating rod, the rotating rod is rotatably installed in the rotating groove, the heat dissipation plate is fixed on the rotating rod, a spiral groove is formed in the outer periphery of the rotating rod, a plurality of fixed plates are arranged in the liquid cooling flow channel, the fixed plates are attached to the ear plate, a plurality of guide blocks are arranged on the fixed plates, the guide blocks are sleeved in the spiral groove.

[0009] As the preferred technical solution, the heat dissipation plate includes a metal sheet, an expansion plate one and an expansion plate two, the expansion plate one and the expansion plate two are respectively arranged on one side of the metal sheet.

[0010] As the preferred technical solution, the expansion directions of the expansion plate one and the expansion plate two are opposite.

[0011] As the preferred technical scheme of the above, the ear plate is provided with a plurality of baffles, and the baffle is close to the movable end of the heat dissipation plate.

[0012] As the preferred technical scheme of the above, the shell is provided with a heat dissipation fin, and the heat dissipation fin is spiral-shaped.

[0013] The beneficial effects of the present application are: 1. In the present application, by setting the bidirectional flow channel, and the inlet end of the cooling liquid is located at both ends, so that the two cooling liquids can complement each other when flowing, thereby making the light isolator assembly evenly heat dissipated, effectively avoiding the uneven heat dissipation affecting the performance of the light isolator assembly. 2. In the present application, when the temperature of the light isolator assembly at a certain place is relatively high, the air bag at this place expands relatively large, so that the air bag is pressed down, and the driving part drives the ear plate to move outward, so that the caliber of the liquid cooling flow channel at this place will be larger, when the cooling liquid flows to this place, the area of this place increases, and the cooling liquid will spread, thereby reducing the flow rate of the cooling liquid at this place, and the residence time of the cooling liquid at this place is longer, thereby increasing the heat exchange time of the cooling liquid and the heat of the light isolator assembly at this place, and further improving the heat dissipation effect of the light isolator assembly at this place, avoiding affecting the performance of the light isolator assembly. 3. In the present application, by moving the plurality of movable plates, the caliber of the flow channel is not the same, when the cooling liquid flows from the flow channel with large caliber into the flow channel with small caliber, the speed of the cooling liquid will be accelerated, so that the heat-absorbed cooling liquid can quickly move away from this place, improving the heat dissipation effect of this place, and avoiding the cooling liquid staying in the area of the light isolator assembly with low temperature for too long, avoiding the high-temperature cooling liquid transferring the heat back to the light isolator assembly, thereby making the light isolator assembly evenly heat dissipated, effectively avoiding the uneven heat dissipation affecting the performance of the light isolator assembly. 4. In the present application, when the ear plate drives the movable plate to move outward, the rotating rod drives the heat dissipation plate to rotate, so that there is a certain angle between the heat dissipation plate and the ear plate, when the cooling liquid flows to this place, the cooling liquid will be intercepted by the heat dissipation plate, so that the residence time of the cooling liquid at this place is increased again, further increasing the heat exchange time of the cooling liquid and the heat of the light isolator assembly at this place, and further improving the heat dissipation effect of the light isolator assembly at this place. 5. In the present application, after the heat dissipation plate rotates, the heat on the heat dissipation plate makes the expansion plate one and the expansion plate two expand and bend, so that the heat dissipation plate presents a serpentine shape, thereby increasing the contact area with the cooling liquid, thereby improving the heat dissipation effect. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a three-dimensional structure schematic diagram of the present application; Figure 2 It is a plane structure schematic diagram of the present application; Figure 3This is a schematic diagram of the internal cross-sectional structure of the present invention; Figure 4 This is a schematic diagram of the inner shell structure; Figure 5 This is a schematic diagram of the liquid cooling channel structure; Figure 6 A schematic diagram of the adjustment component structure; Figure 7 This is a schematic diagram of the drive component structure; Figure 8 This is a schematic diagram of the heat dissipation component structure; Figure 9 This is a schematic diagram of the heat sink structure; Figure 10 This is a schematic diagram of the heat sink and rotating rod structure; Figure 11 This is a schematic diagram of a fixed plate structure.

[0015] In the picture: 1. Outer shell; 2. Inner shell; 21. Extension plate; 22. Fixing plate; 221. Guide block; 23. Guide groove; 24. Movable groove; 25. Press-down groove; 3. Liquid cooling channel; 31. Channel 1; 32. Channel 2; 4. Connector 1; 41. Liquid inlet pipe 1; 42. Liquid outlet pipe 1; 5. Connector 2; 51. Liquid inlet pipe 2; 52. Liquid outlet pipe 2; 6. Adjustment assembly; 61. Movable plate; 62. Ear plate; 621. Embedded groove 622. Rotary groove; 623. Baffle; 63. Support plate; 64. Drive component; 641. Gear plate one; 642. Gear; 643. Gear plate two; 644. Pressure plate; 65. Airbag; 7. Heat dissipation assembly; 71. Heat dissipation plate; 711. Metal sheet; 712. Expansion plate one; 713. Expansion plate two; 72. Rotating rod; 721. Spiral groove; 8. Heat dissipation fin; 9. Plug; 10. Magnet; 11. Optical isolator assembly. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] like Figures 1-5 As shown, an optical isolator with a high-efficiency heat dissipation structure includes a housing 1, an inner housing 2, a plug 9, a magnet 10, and an optical isolator assembly 11. The optical isolator further includes: Liquid cooling channel 3 is provided between the outer shell 1 and the inner shell 2. The liquid cooling channel 3 includes channel one 31 and channel two 32. Both channel one 31 and channel two 32 are spiral-shaped and are arranged alternately. Connector 4 is installed on the outer shell 1. Connector 4 is connected to the flow channel 31. Connector 4 includes an inlet pipe 41 and an outlet pipe 42. The inlet pipe 41 and the outlet pipe 42 are respectively connected to the two ends of the flow channel 31. Connector 2 5 is installed on the outer shell 1. Connector 2 5 is connected to flow channel 2 32. Connector 2 5 includes inlet pipe 2 51 and outlet pipe 2 52. Inlet pipe 2 51 and outlet pipe 2 52 are respectively connected to the two ends of flow channel 2 32. Inlet pipe 1 41 and outlet pipe 2 52 are located on the same side.

[0018] The outer casing 1 is provided with heat sink 8, which is spiral in shape.

[0019] In one embodiment, both connector 4 and connector 5 are connected to an external coolant supply unit.

[0020] In practical application, when the optical isolator assembly 11 generates heat during use, the heat is transferred to the inner shell 2 through the magnet 10. Coolant is then introduced into the flow channel 31 and the flow channel 32 respectively. Since the flow channel 31 and the flow channel 32 are staggered, and the inlet pipe 41 and the outlet pipe 52 are close to each other, and the inlet pipe 51 and the outlet pipe 42 are close to each other, when the coolant is close to the outlet pipe 42, the temperature is high and the heat absorption capacity is low, while the coolant in the inlet pipe 51 has a strong heat absorption capacity. Conversely, when the coolant is close to the outlet pipe 52, the temperature is high and the heat absorption capacity is low, while the coolant in the inlet pipe 41 has a strong heat absorption capacity. This makes the two coolants complementary, so that the optical isolator assembly 11 dissipates heat evenly and effectively avoids the impact of uneven heat dissipation on the performance of the optical isolator assembly 11. By setting two streams of coolant, the temperature rise of each stream of coolant is reduced, thus effectively preventing the coolant from overheating during flow and becoming unable to absorb or transfer heat to the optical isolator assembly 11, thereby ensuring uniform heat dissipation of the optical isolator assembly 11. By providing spiral heat sinks 8 on the housing 1, the heat sink 8 increases the heat dissipation area of ​​the housing 1, so that the heat not absorbed by the coolant is transferred to the heat sink 8 and discharged, thereby improving the heat dissipation efficiency of the optical isolator assembly 11.

[0021] like Figures 4-7As shown, adjustment components 6 are installed in both flow channel 1 31 and flow channel 2 32. The adjustment components 6 include several movable plates 61, with two adjacent movable plates 61 attached together. The movable plates 61 are spiral-shaped. Two ear plates 62 are provided on the movable plates 61. The two ear plates 62 are respectively attached to two opposite inner walls of the liquid cooling flow channel 3. Support plates 63 are provided on the ear plates 62. Several guide grooves 23 are opened on the inner shell 2. The support plates 63 are slidably installed in the guide grooves 23. The movable plates 61 move in the guide grooves 23 through the support plates 63 and move along the depth direction of the liquid cooling flow channel 3.

[0022] The adjustment assembly 6 also includes a drive component 64, which includes a toothed plate 641, a gear 642, and a toothed plate 643. The inner shell 2 has several movable grooves 24 and several pressing grooves 25. The guide grooves 23 and pressing grooves 25 are connected to the movable grooves 24. The toothed plate 641 is fixed on the support plate 63. The gear 642 is elastically rotatably installed in the movable groove 24. The gear 642 meshes with the toothed plate 641. The toothed plate 643 meshes with the other side of the gear 642. The toothed plate 643 extends into the pressing groove 25. The end of the toothed plate 643 is provided with a pressure plate 644. The pressure plate 644 is located in the pressing groove 25. The inner shell 2 has extension plates 21 along the edges of the flow channels 31 and 32. The sides of the extension plates 21 are provided with several airbags 65, which abut against the pressure plate 644.

[0023] In one embodiment, a torsion spring may be provided for the elastically rotating part of the gear 642.

[0024] In practical application, when the heat is high at a certain location of the optical isolator assembly 11, the airbag 65 at this location expands more than the airbags 65 at other locations. The airbag 65 then presses against the pressure plate 644, causing the pressure plate 644 to move the second toothed plate 643 into the movable groove 24. The movement of the second toothed plate 643 drives the gear 642 to rotate, which in turn drives the first toothed plate 641 to move outward. This causes the support plate 63 and the ear plate 62 to move the movable plate 61 outward from the liquid cooling channel 3. Thus, the diameter of the liquid cooling channel 3 at this location changes. The larger surface area allows the coolant to diffuse, resulting in a slower flow rate and a longer residence time. This increases the heat exchange time between the coolant and the optical isolator assembly 11, thus improving heat dissipation and preventing any impact on its performance. Furthermore, this design enables adaptive adjustment of heat dissipation at different locations and temperatures within the optical isolator assembly 11, further enhancing its cooling performance. When the coolant flows from this point to below the adjacent movable plate 61, the diameter of this point increases due to the outward movement of the movable plate 61, while the diameter of the adjacent movable plate 61 is smaller. As a result, the coolant flows from the larger diameter channel to the smaller diameter channel, increasing the speed of the coolant. This allows the coolant, after absorbing heat, to quickly move away from this point, improving the heat dissipation effect. At the same time, it prevents the coolant from staying in the low-temperature area of ​​the optical isolator assembly 11 for too long, and prevents the high-temperature coolant from transferring heat back to the optical isolator assembly 11. This ensures uniform heat dissipation of the optical isolator assembly 11 and effectively avoids uneven heat dissipation affecting the performance of the optical isolator assembly 11.

[0025] like Figures 8-11 As shown, the ear plate 62 is provided with several embedded grooves 621 and rotating grooves 622. The rotating grooves 622 are connected to the embedded grooves 621. Heat dissipation components 7 are installed in the embedded grooves 621 and rotating grooves 622. The heat dissipation components 7 include heat dissipation plates 71 and rotating rods 72. The rotating rods 72 are rotatably installed in the rotating grooves 622. The heat dissipation plates 71 are fixed on the rotating rods 72. The rotating rods 72 are provided with spiral grooves 721 on their periphery. Several fixing plates 22 are provided in the liquid cooling channel 3. The fixing plates 22 are in contact with the ear plate 62. Several guide blocks 221 are provided on the fixing plates 22. The guide blocks 221 are fitted in the spiral grooves 721.

[0026] The ear plate 62 is provided with several baffles 623, which are close to the movable end of the heat sink 71.

[0027] In practical application, when the ear plate 62 drives the movable plate 61 to move outward, the rotating rod 72 on the ear plate 62 also moves outward. It moves within the spiral groove 721 via the guide block 221, causing the rotating rod 72 to rotate when the ear plate 62 moves outward. The rotating rod 72 drives the heat sink 71 to rotate out of the embedded groove 621, and the heat sink 71 will be at a certain angle with the ear plate 62. When the coolant flows here, the coolant will be intercepted by the heat sink 71, which increases the residence time of the coolant here, further increasing the heat exchange time between the coolant and the optical isolator assembly 11, and further improving the heat dissipation effect of the optical isolator assembly 11 here. The baffle 623 is provided to prevent the coolant from causing the heat sink 71 to rotate when it is normally located in the embedded groove 621.

[0028] Furthermore, the heat sink 71 includes a metal sheet 711, an expansion plate 712 and an expansion plate 713, with an expansion plate 712 and an expansion plate 713 respectively provided on one side of the metal sheet 711.

[0029] The expansion plates 712 and 713 expand in opposite directions.

[0030] In one embodiment, the expansion coefficients of expansion plate 712 and expansion plate 713 are both greater than the expansion coefficient of metal sheet 711, and metal sheet 711, expansion plate 712 and expansion plate 713 constitute a thermo-bending element.

[0031] In practical application, some of the heat from the optical isolator assembly 11 is transferred to the ear plate 62 and the movable plate 61 through the fixed plate 22. The heat on the ear plate 62 is transferred to the heat sink 71. When the heat sink 71 rotates and moves, the expansion plate 1 712 and expansion plate 2 713 are no longer constrained. The heat on the heat sink 71 causes the expansion plate 1 712 and expansion plate 2 713 to expand and bend, so that the heat sink 71 presents a serpentine bend, which increases the contact area with the coolant and thus improves the heat dissipation effect.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. An optical isolator with a high-efficiency heat dissipation structure, comprising a shell (1), an inner shell (2), a plug (9), a magnet (10), and an optical isolator assembly (11), characterized in that, The optical isolator also includes: Liquid cooling channel (3), a liquid cooling channel (3) is provided between the outer shell (1) and the inner shell (2), the liquid cooling channel (3) includes channel one (31) and channel two (32), both channel one (31) and channel two (32) are spiral, and channel one (31) and channel two (32) are staggered; Connector 1 (4), the outer shell (1) is equipped with connector 1 (4), the connector 1 (4) is connected to flow channel 1 (31), the connector 1 (4) includes inlet pipe 1 (41) and outlet pipe 1 (42), the inlet pipe 1 (41) and outlet pipe 1 (42) are respectively connected to the two ends of flow channel 1 (31); Connector 2 (5), the outer shell (1) is equipped with connector 2 (5), connector 2 (5) is connected to flow channel 2 (32), connector 2 (5) includes inlet pipe 2 (51) and outlet pipe 2 (52), the inlet pipe 2 (51) and outlet pipe 2 (52) are respectively connected to the two ends of flow channel 2 (32); The first liquid inlet pipe (41) and the second liquid outlet pipe (52) are located on the same side.

2. The optical isolator with a high-efficiency heat dissipation structure according to claim 1, characterized in that, An adjustment assembly (6) is installed in both the first flow channel (31) and the second flow channel (32). The adjustment assembly (6) includes several movable plates (61). Two adjacent movable plates (61) are attached together. The several movable plates (61) are spiral-shaped. Two ear plates (62) are provided on the movable plates (61). The two ear plates (62) are respectively attached to two opposite inner walls of the liquid cooling flow channel (3). A support plate (63) is provided on the ear plate (62). Several guide grooves (23) are opened on the inner shell (2). The support plate (63) is slidably installed in the guide groove (23). The several movable plates (61) move in the guide groove (23) through the support plate (63) and move along the depth direction of the liquid cooling flow channel (3).

3. The optical isolator with a high-efficiency heat dissipation structure according to claim 2, characterized in that, The adjustment assembly (6) further includes a driving component (64), which includes a toothed plate (641), a gear (642), and a toothed plate (643). The inner shell (2) has several movable slots (24) and several pressing slots (25). The guide slots (23) and pressing slots (25) are connected to the movable slots (24). The toothed plate (641) is fixed to the support plate (63). The gear (642) is rotatably mounted in the movable slot (24). The gear (642) is connected to the toothed plate (643). (641) mesh with each other, and the other side of the gear (642) meshes with a toothed plate (643). The toothed plate (643) extends into the lower pressure groove (25). The end of the toothed plate (643) is provided with a pressure plate (644). The pressure plate (644) is located in the lower pressure groove (25). The inner shell (2) surface is provided with an extension plate (21) along the edge of the first flow channel (31) and the second flow channel (32). The side of the extension plate (21) is provided with several airbags (65). The airbags (65) abut against the pressure plate (644).

4. The optical isolator with a high-efficiency heat dissipation structure according to claim 3, characterized in that, The ear plate (62) is provided with several embedded grooves (621) and rotating grooves (622). The rotating grooves (622) are connected to the embedded grooves (621). Heat dissipation components (7) are installed in the embedded grooves (621) and rotating grooves (622). The heat dissipation components (7) include a heat dissipation plate (71) and a rotating rod (72). The rotating rod (72) is rotatably installed in the rotating groove (622). The heat dissipation plate (71) is fixed on the rotating rod (72). A spiral groove (721) is provided around the rotating rod (72). Several fixing plates (22) are provided in the liquid cooling channel (3). The fixing plates (22) are in contact with the ear plate (62). Several guide blocks (221) are provided on the fixing plates (22). The guide blocks (221) are fitted in the spiral grooves (721).

5. The optical isolator with a high-efficiency heat dissipation structure according to claim 4, characterized in that, The heat sink (71) includes a metal sheet (711), an expansion plate one (712) and an expansion plate two (713), with an expansion plate one (712) and an expansion plate two (713) respectively provided on one side of the metal sheet (711).

6. The optical isolator with a high-efficiency heat dissipation structure according to claim 5, characterized in that, The expansion plates 1 (712) and 2 (713) expand in opposite directions.

7. The optical isolator with a high-efficiency heat dissipation structure according to claim 4, characterized in that, The ear plate (62) is provided with several baffles (623), and the baffles (623) are close to the movable end of the heat sink (71).

8. The optical isolator with a high-efficiency heat dissipation structure according to claim 1, characterized in that, The outer shell (1) is provided with heat sinks (8) on its periphery, and the heat sinks (8) are spiral-shaped.

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