Ultrahigh-power laser transmission optical cable and temperature control system thereof

Abstract

The utility model discloses an ultrahigh-power laser transmission optical cable and a temperature control system thereof. The transmission optical cable comprises an optical fiber body; a circulation channel is formed between the outer protection layer and the optical fiber body, the circulation channel is used for being filled with cooling fluid, and the cooling fluid is in direct contact with the optical fiber body. Through the mode, the transmission optical cable provided by the utility model can support ultrahigh-power laser transmission, and the heat dissipation efficiency is greatly improved by adopting an active heat dissipation mode.

Description

Technical Field

[0001] The present application relates to the field of laser optical cable technology, and in particular to an ultra-high power laser transmission optical cable and a temperature control system thereof. Background Art

[0002] In the field of laser metal processing, end-users have increasingly higher demands for processing efficiency and processing material thickness, so ultra-high power output lasers are one of the important development directions of fiber lasers.

[0003] As the power of laser transmission in optical fiber increases, the temperature of the transmission cable also increases due to fiber loss and evanescent waves. For example, in an ultra-high power laser with a laser output of 60,000 watts, more than ten watts of laser light will leak out of the transmission cable per meter, and the temperature of the transmission cable will be above 70°C.

[0004] In the case of a high temperature working environment, if the conventional natural cooling solution is used, the transmission optical cable will work at a high temperature for a long time, and the coating layer on the surface of the optical fiber will accelerate aging, thereby destroying the total reflection condition of the optical fiber, causing the transmission optical cable and the core components inside the laser to fail. In summary, conventional naturally cooled transmission optical cables are no longer suitable for ultra-high power fiber lasers, and targeted design of temperature control of ultra-high power fiber laser transmission optical cables is required. Utility Model Content

[0005] The present application mainly provides an ultra-high power laser transmission optical cable and a temperature control system thereof to solve the problem of poor heat dissipation performance of the transmission optical cable under high working environment temperature and ultra-high power state.

[0006] In order to solve the above technical problems, a technical solution adopted in this application is:

[0007] Provided is an ultra-high power laser transmission optical cable, one end of the transmission optical cable is connected to a laser, and the other end is connected to a laser processing device, and the transmission optical cable includes:

[0008] Optical fiber body;

[0009] A circulation channel is formed between the outer protective layer and the optical fiber body, and the circulation channel is used to be filled with cooling fluid, wherein the cooling fluid is in direct contact with the optical fiber body.

[0010] In some embodiments, the cooling fluid is a non-conductive medium.

[0011] In some embodiments, a cooling fluid is circulated between the laser and the laser processing device.

[0012] In some embodiments, at least a portion of the circulation channel is disposed around the optical fiber body.

[0013] In some embodiments, the circulation channel is connected to a cooling channel of a laser output head of a laser processing device, and is used to cool a quartz end cap in the laser output head.

[0014] In order to solve the above technical problems, another technical solution adopted by the present application is: to provide a transmission optical cable temperature control system, comprising:

[0015] A transmission optical cable, wherein a circulation channel is provided inside the transmission optical cable, and the circulation channel is used to be filled with a cooling fluid, wherein the cooling fluid is in direct contact with the optical fiber body in the transmission optical cable;

[0016] The heat exchanger includes a heat exchange box and an internal circulation driving component. The heat exchange box includes a heat exchange component and an auxiliary cavity and a main cooling cavity separated by the heat exchange component. The auxiliary cavity is connected to a circulation channel. The internal circulation driving component is arranged in the auxiliary cavity and is used to drive the cooling fluid to circulate between the auxiliary cavity and the circulation channel, and transfer the heat of the cooling fluid to the main cooling cavity through the heat exchange component.

[0017] In some embodiments, the heat exchanger further comprises a cooler connected to the cooling channel in the main cooling cavity.

[0018] In some embodiments, the optical cable temperature control system further includes a laser, which is installed in the main cooling cavity, and the heat dissipation channel of the laser is connected to the cooling channel of the main cooling cavity.

[0019] In some embodiments, the heat exchange element is a heat exchange pipe with a corrosion-resistant layer coated on the surface.

[0020] In some embodiments, the optical cable temperature control system further includes a storage container, which is in communication with the auxiliary cavity and is used to contain cooling fluid.

[0021] The beneficial effects of the present application are as follows: Different from the prior art, the present application discloses an ultra-high power laser transmission optical cable and its temperature control system. A circulation channel is formed between the outer protective layer and the optical fiber body, wherein the cooling fluid filled in the circulation channel is in direct contact with the optical fiber body, and the optical fiber body is actively cooled directly by the circulating cooling fluid, which can effectively improve the heat dissipation efficiency, and the transmission optical cable can support ultra-high power laser transmission; and the cooling fluid uses deionized water or inert gas, etc., which can effectively reduce damage such as corrosion to the optical fiber body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0023] Figure 1 It is a schematic diagram of the cross-sectional structure of the ultra-high power laser transmission optical cable of the present application;

[0024] Figure 2 It is a structural schematic diagram of an embodiment of an optical cable temperature control system provided by the present application. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0026] The terms "first", "second", "third" in the embodiments of the present application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0027] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] The present application provides an ultra-high power laser transmission optical cable, one end of which is connected to a laser, and the other end is connected to a laser processing device. Figure 1 The transmission optical cable 10 includes an optical fiber body 12 and an outer protective layer 14 , a circulation channel 101 is formed between the outer protective layer 14 and the optical fiber body 12 , and the circulation channel 101 is used to fill a cooling fluid, wherein the cooling fluid is in direct contact with the optical fiber body 12 .

[0029] Since the circulation channel 101 is arranged outside the optical fiber body 12, and the cooling fluid in the circulation channel 101 can be in direct contact with the optical fiber body 12, that is, there is no material isolation such as a heat conductive layer, a corrosion resistant layer or other isolation layer between the circulation channel 101 and the optical fiber body 12, thereby improving the heat dissipation efficiency of the optical fiber body 12 to the cooling fluid; alternatively, a heat conductive layer or a corrosion resistant layer may be provided between the circulation channel 101 and the optical fiber body 12 to protect the optical fiber body 12.

[0030] In the embodiment of the present application, the outer protective layer 14 is a tubular structure, which is arranged outside the optical fiber body 12 to protect the optical fiber body 12. The outer protective layer 14 can be made of plastic or rubber material with high flexibility, which can improve the flexibility of the transmission optical cable.

[0031] A circulation channel 101 is formed between the outer protective layer 14 and the optical fiber body 12, that is, the outer side of the optical fiber body 12 is the circulation channel 101. The cooling fluid is in direct contact with the optical fiber body 12, which can improve the heat dissipation efficiency of the optical fiber body 12 and is suitable for active heat dissipation of the transmission optical cable 10 in optical fiber lasers under ultra-high power and high operating environment temperature.

[0032] In some embodiments, the cooling fluid is a non-conductive medium. For example, the cooling fluid circulating in the circulation channel 101 includes a cooling liquid and a cooling gas, that is, the cooling method can be liquid cooling or air cooling, which are both fluids that conduct heat absorbed from the optical fiber body 10 through flow, thereby achieving efficient heat dissipation of the optical fiber body 10.

[0033] Specifically, the coolant includes deionized water or other liquids that are very weakly corrosive or even non-corrosive to the optical fiber body or the isolation layer thereon. The coolant can also be a formulated low-corrosive liquid that only needs to be low-corrosive or even non-corrosive to the optical fiber body 12, isolation layer, and auxiliary cavity 214 that are in contact with it.

[0034] In this embodiment, deionized water is used as the cooling fluid for illustration, wherein deionized water has extremely low direct corrosiveness, is easily available, and has low cost of use.

[0035] Optionally, the cooling fluid may be cooling gas, including inert gas, including nitrogen and argon, etc., which are non-corrosive and can avoid damage to the optical fiber body 12. The cooling gas may also be carbon dioxide gas, etc., which is not specifically limited in this application.

[0036] In some embodiments, at least part of the circulation channel is surrounded by the optical fiber body. In the present application, one end of the transmission optical cable is connected to the laser, and the other end is connected to the laser processing device, so the circulation channel can be arranged in the optical cable and the laser and / or laser processing device at the same time, and the cooling fluid in the circulation channel can cool the optical fiber body while also cooling the shell and some components in the laser and / or laser processing device.

[0037] Specifically, when the laser processing device is configured as a laser cutting head, the circulation channel extends to the interior of the cutting head and is connected to the cooling channel inside the cutting head. The cooling fluid can not only cool the optical fiber body, but also cool the laser output head and the shell in the cutting head. When the laser processing device is configured as a laser welding head, the cooling fluid can not only cool the optical fiber body, but also cool the laser output head, shell and nozzle in the welding head.

[0038] It can be understood that the transmission optical cable 10 provided in the present application forms a circulation channel 101 between the outer protective layer 14 and the optical fiber body 12, wherein the cooling fluid filled in the circulation channel 101 is in direct contact with the optical fiber body 12, and there is no need to set an isolation layer such as an inner protective layer and a heat conductive layer between the circulation channel 101 and the optical fiber body 12, thereby effectively improving the heat dissipation efficiency, and the use of deionized water or inert gas as the cooling fluid can effectively reduce corrosion and other damages to the optical fiber body 12.

[0039] In this embodiment, the outer protective layer 14 includes a first isolation layer 141, a second isolation layer 142, and a buffer layer 143 formed between the first isolation layer 141 and the second isolation layer 142, which are sequentially nested outside the optical fiber body 12. A circulation channel 101 is formed between the first isolation layer 141 and the optical fiber body 12, and the buffer layer 143 is used for routing signal lines.

[0040] The first isolation layer 141 is made of corrosion-resistant materials, such as corrosion-resistant plastic materials or corrosion-resistant polymer materials, to further enhance the corrosion resistance to the cooling fluid; the second isolation layer 142 can be made of plastic materials or silicone materials, and the first isolation layer 141 and the second isolation layer 142 both play an isolation support role.

[0041] The buffer layer 143 separated and defined by the first isolation layer 141 and the second isolation layer 142 may have conventional air as its internal medium and be used to route various signal lines. Alternatively, the buffer layer 143 may be filled with elastic materials such as cotton or gauze.

[0042] Furthermore, the outer protective layer 14 also includes a third isolation layer 144 arranged outside the second isolation layer 142. The third isolation layer 144 includes a metal armor and a protective layer wrapped outside the metal armor. The protective layer can be a plastic layer, a silicone layer, a rubber layer or a cotton layer, etc., to enhance the transmission armor cable's resistance to external forces and bending.

[0043] Among them, multiple brackets (not shown) can be arranged along the optical fiber in the circulation channel 101 and the buffer layer 143 to maintain the uniformity of the circulation channel 101 and the buffer layer 143, so that the gaps at various positions of the circulation channel 101 are kept consistent, and the gaps at various positions of the buffer layer 143 are kept consistent; and a flow port is provided on the bracket to allow the cooling fluid to flow through the bracket.

[0044] It can be understood that the circulation channel 101 is connected to the cooling channel of the laser output head of the laser processing device to cool the quartz end cap in the laser output head.

[0045] In some embodiments, the two ends of the transmission optical cable 10 are respectively configured as an inlet and an outlet for the cooling fluid. The cooling fluid flows into the circulation channel 101 from the inlet, flows through the entire transmission optical cable 10 along the circulation channel 101, exchanges heat with the optical fiber body 12, and then flows out of the circulation channel 101 from the outlet.

[0046] Since the two ends of the transmission optical cable 10 are respectively connected to the laser and the laser processing device, the inlet of the cooling fluid can be set on the laser, and the outlet of the cooling fluid can be set in the laser output head of the laser processing device; or, the outlet of the cooling fluid can be set on the laser, and the inlet of the cooling medium can be set in the laser output head of the laser processing device.

[0047] In other embodiments, the circulation channel 101 can be further divided into a first circulation channel and a second circulation channel in parallel, wherein one end of the first circulation channel is connected to one end of an adjacent second circulation channel, the other end of the first circulation channel can be used as one of the inlet and outlet of the cooling fluid, and the other end of the second circulation channel can be used as the other of the inlet and outlet of the cooling fluid.

[0048] The cooling fluid first flows into the first circulation channel from the cooling fluid inlet, and flows into the second circulation channel at the end of the first circulation channel, flows through the second circulation channel in the opposite direction, and flows out from the cooling fluid outlet. Since the flow directions of the cooling fluid in the first circulation channel and the second circulation channel are opposite, the cooling fluid is turned back in the second circulation channel and flows out from the cooling fluid outlet at the end of the second circulation channel, so that the cooling fluid circulates back and forth in the first circulation channel and the second circulation channel, and the cooling fluid inlet and outlet can be located at the same end of the transmission optical cable.

[0049] Since the circulation channel 101 is arranged as a dual-channel mode having a first circulation channel and a second circulation channel, the return circulation flow of the cooling fluid is realized, and the inlet and outlet of the cooling fluid can be arranged closely at the same end of the circulation channel 101. For example, the inlet and outlet of the cooling fluid can be arranged on the cabinet of the laser, which simplifies the structural realization of supplying cooling fluid to the transmission optical cable 10 and removes the restrictions on both ends of the transmission optical cable 10, so that the arrangement of the transmission optical cable 10 can be more free and flexible, and the output head connected to the transmission optical cable 10 can be freely moved, thereby improving its scene practicality and retaining the flexible processing method in which the laser output head of the laser can be moved at will.

[0050] For example, the circulation channel 101 can be divided into a first circulation channel and a second circulation channel in parallel by a bracket, and the bracket includes a partition extending along the axis of the optical fiber body 12, and the partition divides the circulation channel 101 into a first circulation channel and a second circulation channel in parallel, wherein the optical fiber body 12 can be clamped in the hollow part of the partition and seal the hollow part, so that the cooling fluid respectively located in the first circulation channel and the second circulation channel can directly contact with the optical fiber body 12; and at one end of the circulation channel 101, a size difference is formed between the end of the partition and the ends of the optical fiber body 12 and the outer protective layer 14, so as to form a connecting channel connecting the first circulation channel and the second circulation channel through the size difference, or the end of the partition is provided with a connecting hole connecting the first circulation channel and the second circulation channel.

[0051] As another aspect of the present application, the present application also provides an optical cable temperature control system 100, see Figure 2 , Figure 2 It is a structural schematic diagram of an embodiment of an optical cable temperature control system provided by the present application.

[0052] The optical cable temperature control system 100 includes a transmission optical cable and a heat exchanger 20. A circulation channel is provided inside the transmission optical cable. The circulation channel is used to fill a cooling fluid, wherein the cooling fluid is in direct contact with the optical fiber body in the transmission optical cable. The present application uses the flowing cooling fluid to take away the heat of the optical fiber and actively cools the optical fiber; the heat exchanger 20 includes a heat exchange box 21 and an internal circulation drive 22. The heat exchange box 21 includes a heat exchange element 212 and an auxiliary cavity 214 and a main cooling cavity 216 isolated by the heat exchange element 212. The auxiliary cavity 214 is connected to the circulation channel 101 of the transmission optical cable. The internal circulation drive 22 is arranged in the auxiliary cavity 214 and is used to drive the cooling fluid to circulate between the auxiliary cavity 214 and the circulation channel 101, and conduct the heat of the cooling fluid to the main cooling cavity 216 through the heat exchange element 212.

[0053] In this embodiment, the transmission optical cable is connected to the heat exchange box 21, wherein the inlet and outlet of the cooling fluid are arranged at the same end of the transmission optical cable and are connected to the auxiliary cavity 214 in the heat exchange box 21, and the internal circulation driving member 22 is arranged in the auxiliary cavity 214 to drive the cooling fluid to circulate between the auxiliary cavity 214 and the circulation channel 101 to take away the heat generated by the optical fiber body 12, and exchange heat with the main cooling cavity 216 through the heat exchange member 212, thereby realizing active cooling of the transmission optical cable.

[0054] The auxiliary cavity 214 can be a pipeline structure in the heat exchange box 21, which is isolated from the main cooling cavity 216, thereby avoiding the introduction of uncontrolled pollution sources into the auxiliary cavity 214 or the circulation channel 101 of the transmission optical cable, that is, avoiding external cooling fluid from contaminating the transmission optical cable.

[0055] Preferably, the internal circulation driving member 22 can adopt an internal circulation pump. Specifically, a liquid pump or an air pump can be selected based on the cooling method to drive the internal circulation cooling fluid to circulate in the circulation channel formed by the auxiliary cavity 214 and the circulation channel 101 of the transmission optical cable. The flow rate is controlled within a preset flow rate range and circulates continuously. The temperature of the cooling fluid can be controlled at 15°C to 30°C.

[0056] In this embodiment, the heat exchange element 212 is a heat exchange pipe with a corrosion-resistant layer on the surface, such as a gold-plated copper pipe, which can effectively improve the heat exchange efficiency between the auxiliary cavity 214 and the main cooling cavity 216, and the corrosion-resistant layer can prevent the heat exchange pipe from rusting; or the heat exchange element 212 can also be a heat-conducting partition, etc.

[0057] The heat exchange element 212 can play a role in isolating the auxiliary cavity 214 from the main cooling cavity 216 , and can achieve a heat exchange effect between the auxiliary cavity 214 and the main cooling cavity 216 .

[0058] The main cooling cavity 216 may be introduced into an external water cooling system, that is, the main cooling cavity 216 may be configured to include a pipeline structure and connected to the external water cooling system to achieve active heat dissipation of the cooling fluid in the auxiliary cavity 214. Alternatively, the main cooling cavity 216 may be introduced into an external air cooling system, the main cooling cavity 216 may be configured to include a plurality of heat dissipation fins, and the external air cooling system passes cold air into the main cooling cavity 216 to achieve active heat dissipation of the cooling fluid in the auxiliary cavity 214.

[0059] Specifically, the heat exchanger 20 also includes a cooler 23 connected to the cooling channel in the main cooling cavity 216. The cooler 23 uses liquid cooling to take away the heat absorbed by the main cooling cavity 216. The cooler 23 injects low-temperature fluid into the main cooling cavity 216, recovers the high-temperature fluid after heat exchange with the heat exchange element 212, and circulates the high-temperature fluid to make a low-temperature fluid.

[0060] Furthermore, this embodiment also actively dissipates heat for the laser 30 , and the laser 30 is also connected to the transmission optical cable 10 and transmits laser light outward through the transmission optical cable.

[0061] Specifically, the optical cable temperature control system 100 further includes a laser 30 , which is installed in the main cooling cavity 216 , and a heat dissipation channel of the laser 30 is connected to a cooling channel of the main cooling cavity 214 .

[0062] Like the high-power laser 30 commonly used now, it will generate a lot of heat when working. Conventional heat dissipation methods cannot remove a lot of waste heat in time. In order to maintain the long-term stable working state of the laser 30, the laser 30 can be installed in the main cooling cavity 216 to introduce the cooler 23 to provide an external liquid cooling source to take away the heat in the laser generation process in time.

[0063] A heat dissipation channel for water cooling is provided in the substrate of the laser 30, and the heat dissipation channel is distributed in each heat-generating module in the laser 30. By connecting the heat dissipation channel of the laser 30 with the cooling channel of the main cooling cavity 214, a water cooling circulation loop can be formed between the laser 30, the main cooling cavity 214 and the cooler 23.

[0064] The heat generated by the pump source module and the optical fiber module in the laser 30 is transferred to the heat dissipation channel inside the laser 30 and circulated to the cooler 23 through the water path for heat treatment.

[0065] The optical cable temperature control system 100 provided in the present application can realize active cooling of the transmission optical cable 10 and the laser 30. Compared with the natural heat dissipation method, the optical cable temperature control system 100 provided in the present application has higher heat dissipation efficiency, and is therefore more suitable for application scenarios of high ambient temperature and / or high power laser 30 and its transmission optical cable 10.

[0066] Furthermore, the optical cable temperature control system 100 further includes a storage container 24 , which is in communication with the auxiliary cavity 214 , and is used to contain cooling fluid.

[0067] When the laser 30 and the transmission optical cable 10 are not in operation, the low-temperature cooling liquid has the risk of freezing and causing the transmission optical cable 10 to fail. Therefore, the storage container 24 can be used to store the withdrawn cooling fluid to prevent the transmission optical cable 10 from failing due to freezing of the cooling liquid.

[0068] Specifically, after the laser 30 stops working, the internal circulation driving component 22 draws the cooling fluid in the circulation channel 101 back to the storage container 24, wherein the storage container 24 is provided with a liquid level detection component, which may be a liquid level meter or a water level sensor, etc. When the liquid level in the storage container 24 reaches a set height, the internal circulation driving component 22 stops drawing back the cooling fluid; and when the laser 30 starts working, the internal circulation driving component 22 also releases the cooling liquid to the circulation channel 101 of the transmission optical cable 10.

[0069] Different from the prior art, the present application discloses an ultra-high power laser transmission optical cable and its temperature control system. A circulation channel is formed between the outer protective layer and the optical fiber body, wherein the cooling fluid filled in the circulation channel is in direct contact with the optical fiber body, and the optical fiber body is actively cooled directly by the circulating cooling fluid, which can effectively improve the heat dissipation efficiency. The transmission optical cable can support ultra-high power laser transmission; and the cooling fluid uses deionized water or inert gas, etc., which can effectively reduce corrosion and other damage to the optical fiber body.

[0070] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An ultra-high power laser transmission optical cable, one end of which is connected to a laser, and the other end is connected to a laser processing device, characterized in that: The transmission optical cable comprises: Optical fiber body; A circulation channel is formed between the outer protective layer and the optical fiber body, and the circulation channel is used to be filled with cooling fluid, wherein the cooling fluid is in direct contact with the optical fiber body.

2. The transmission optical cable according to claim 1, characterized in that: The cooling fluid is a non-conductive medium.

3. The transmission optical cable according to claim 2, characterized in that: The cooling fluid circulates between the laser and the laser processing device.

4. The transmission optical cable according to claim 1, characterized in that: At least a portion of the circulation channel is arranged around the optical fiber body.

5. The transmission optical cable according to claim 4, characterized in that: The circulation channel is connected to the cooling channel of the laser output head of the laser processing device and is used for cooling the quartz end cap in the laser output head.

6. A transmission optical cable temperature control system, characterized in that: include: A transmission optical cable, wherein a circulation channel is provided inside the transmission optical cable, and the circulation channel is used to be filled with a cooling fluid, wherein the cooling fluid is in direct contact with an optical fiber body in the transmission optical cable; A heat exchanger comprises a heat exchange box and an internal circulation driving member, wherein the heat exchange box comprises a heat exchange member and an auxiliary cavity and a main cooling cavity isolated by the heat exchange member, the auxiliary cavity is connected to the circulation channel, the internal circulation driving member is arranged in the auxiliary cavity and is used to drive the cooling fluid to circulate between the auxiliary cavity and the circulation channel, and transfer the heat of the cooling fluid to the main cooling cavity through the heat exchange member.

7. The transmission optical cable temperature control system according to claim 6, characterized in that: The heat exchanger also includes a cooler connected to a cooling channel in the main cooling cavity.

8. The transmission optical cable temperature control system according to claim 7, characterized in that: The optical cable temperature control system further comprises a laser, which is installed in the main cooling cavity, and a heat dissipation channel of the laser is in communication with a cooling channel of the main cooling cavity.

9. The transmission optical cable temperature control system according to claim 6, characterized in that: The heat exchange element is a heat exchange pipe with a corrosion-resistant layer plated on the surface.

10. The transmission optical cable temperature control system according to claim 6, characterized in that: The optical cable temperature control system further comprises a storage container, which is communicated with the auxiliary cavity and is used to contain the cooling fluid.

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