A high power optical fiber amplifier

Abstract

The invention relates to the field of optical fiber laser technology, and in particular to a high-power optical fiber amplifier, comprising an outer shell, an erbium-doped optical fiber and a refrigeration component; a partition is arranged in the outer shell to divide the internal space into a working space and a cooling space; an annular airway space is arranged in the outer shell corresponding to the cooling space; the erbium-doped optical fiber is spirally arranged on the side wall of the cooling space; a Bernoulli nozzle is arranged on the side wall between the annular grooves, the Bernoulli nozzle is made of a heat-conducting material and is bonded to the erbium-doped optical fiber; the Bernoulli nozzle is connected with the airway space; an air inlet is arranged on the partition; a connecting port is arranged on the airway space, and the air inlet, the refrigeration component and the connecting port are sequentially connected; the invention arranges a Bernoulli nozzle between the spiral erbium-doped optical fibers, cooperates with the refrigeration component to enable the Bernoulli nozzle to quickly cool down, the Bernoulli nozzle is not directly aligned with the erbium-doped optical fiber for cooling, and uses the Bernoulli nozzle as an intermediate component for indirect cooling to ensure stability.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber lasers, and in particular to a high-power optical fiber amplifier. Background Art

[0002] In the early 1990s, with the successful development of erbium-doped fiber amplifiers and the increasing maturity of wavelength division multiplexing technology, the capacity and transmission distance of fiber-optic communications have been greatly improved. However, the explosive development of the network in recent years has caused the amount of data communication to double, which has put forward higher requirements on the capacity of fiber-optic communication systems. In order to achieve better signal amplification effects in the existing technology, a high-power pump laser module is used to act on the erbium-doped fiber. When the high-power pump laser module acts on the erbium-doped fiber, it will excite the Er ions to transition from the ground state energy level to the high energy level, forming a particle state inversion distribution, which is mainly achieved by increasing the power; however, as a gain medium, the erbium-doped fiber will produce a particle number inversion under the excitation of the pump light, and realize stimulated radiation amplification under the induction of the signal light. During this process, the erbium ions in the optical fiber will undergo energy level transitions, thereby releasing energy and generating heat; however, if the operating temperature is too high, it will affect the gain characteristics and stability of the erbium-doped optical fiber, thereby causing the erbium-doped optical fiber amplifier to fail, shut down, or even crash. Therefore, the optical fiber amplifier in the prior art needs to be shut down for cooling, resulting in low efficiency; or water cooling is used for cooling, but the water flow will cause disturbances to the light, thereby affecting the amplification effect; it can be seen that a high-power optical fiber amplifier is needed that can ensure that the appropriate operating temperature can be maintained continuously and stably under high-power conditions. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a high-power optical fiber amplifier which can ensure a suitable operating temperature continuously and stably under a high-power state.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A high-power optical fiber amplifier comprises an outer shell, an erbium-doped optical fiber and a refrigeration component;

[0006] A partition is provided in the outer shell to divide the inner space of the outer shell into a working space and a cooling space; an air inlet and an air outlet are provided in the working space;

[0007] The cooling space is in the shape of a circular groove, and an annular airway space is arranged in the outer shell corresponding to the cooling space, and the airway space is arranged coaxially with the cooling space; the side wall of the cooling space is provided with a spiral structure formed by connecting multiple layers of annular grooves end to end, and the erbium-doped optical fiber is spirally arranged on the side wall of the cooling space; a plurality of placement grooves are arranged on the side wall between the annular grooves, and there are intervals between the placement grooves, and a Bernoulli nozzle is arranged on the placement groove, and the Bernoulli nozzle is made of heat-conducting material, and the middle part of the Bernoulli nozzle is a depression, and the depression is fitted with the erbium-doped optical fiber above and / or below; one end of the Bernoulli nozzle is connected to the airway space, and the other end is arranged toward the center of the working space; the working space is a sealed space, and the working space is filled with a refrigerant;

[0008] The refrigeration assembly includes a controller, a temperature sensor, a micro compressor, a heat dissipation pipeline, and a radiator; the temperature sensor is attached to the erbium-doped optical fiber; the controller, the micro compressor, the heat dissipation pipeline, and the radiator are arranged in a working space, the controller is electrically connected to the temperature sensor, the micro compressor, and the radiator respectively, the radiator is arranged on the heat dissipation pipeline and connected to the air outlet; the partition is provided with an air inlet, and the air inlet is coaxially arranged with the working space; the air duct space is provided with a connecting port, and the air inlet, the micro compressor, the heat dissipation pipeline, and the connecting port are connected in sequence;

[0009] When the high-power fiber amplifier is working, the controller obtains the temperature of the erbium-doped fiber in real time through the temperature sensor. Otherwise, it will not take any action. If the temperature exceeds the threshold, the controller starts the compressor to suck the refrigerant in the working space through the air inlet on the partition and compress it into a high-temperature and high-pressure gas. The gas is then dissipated through the heat dissipation pipeline in conjunction with the radiator and the air outlet to obtain medium-temperature and high-pressure liquid refrigerant. After entering the airway space, it expands and absorbs heat through the Bernoulli nozzle, causing the Bernoulli nozzle to cool down. The recessed part of the cooled Bernoulli nozzle fits with the erbium-doped fiber above and / or below to indirectly take away the heat of the erbium-doped fiber.

[0010] The beneficial effects of the present invention are as follows: by arranging an installation groove between spiral erbium-doped optical fibers, and arranging a Bernoulli nozzle in the installation groove, in conjunction with a refrigeration component, a micro compressor can be used in conjunction with a heat dissipation pipeline, so that the refrigerant can be fully compressed and dissipated and then pass through the Bernoulli nozzle, so that the Bernoulli nozzle can quickly cool down, and the Bernoulli nozzle does not directly cool the erbium-doped optical fiber, but uses the Bernoulli nozzle as an intermediate component for indirect cooling, which can avoid the interference of the flow of fluid on the erbium-doped optical fiber and affect the amplification effect; ensure the stability of the optical fiber amplifier at high power; and achieve various aspects by coaxially arranging the air inlet and the working space. The airflows in opposite directions converge here and collide with each other to slow down, further ensuring that the high-speed airflow will not affect the erbium-doped optical fiber; by adopting components such as a compressor, it can have a very strong cooling effect to meet the needs of high-power and long-term work, and the other end of the Bernoulli nozzle is arranged toward the center of the working space, so that the radiant heat emitted by the erbium-doped optical fiber can be quickly taken away, avoiding the problem of heat concentration and difficulty in dissipation during the long-term process, overcoming the situation in the prior art that it is necessary to stop and wait for cooling, and can control the working temperature of the high-power optical fiber amplifier at the optimal temperature by controlling the operation of the compressor to improve efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic diagram of the structure of a high-power optical fiber amplifier according to a specific embodiment of the present invention;

[0012] Explanation of reference numerals: 1. Outer shell; 11. Partition; 12. Working space; 13. Cooling space; 14. Air inlet; 15. Air outlet; 16. Airway space; 17. Bernoulli nozzle; 18. Air inlet; 2. Erbium-doped optical fiber; 3. Refrigeration component; 31. Controller; 32. Temperature sensor; 33. Micro compressor; 34. Heat dissipation duct; 35. Radiator; 36. Solenoid expansion valve; 4. Display screen. DETAILED DESCRIPTION

[0013] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0014] Please refer to Figure 1 , a high-power optical fiber amplifier, comprising an outer shell 1, an erbium-doped optical fiber 2 and a refrigeration component 3;

[0015] The outer shell 1 is provided with a partition 11 to divide the inner space of the outer shell 1 into a working space 12 and a cooling space 13; the working space 12 is provided with an air inlet 14 and an air outlet 15;

[0016] The cooling space 13 is in the shape of a circular groove, and an annular airway space 16 is arranged in the outer shell 1 corresponding to the cooling space 13, and the airway space 16 is arranged coaxially with the cooling space 13; the side wall of the cooling space 13 is provided with a spiral structure formed by connecting multiple layers of annular grooves end to end, and the erbium-doped optical fiber 2 is arranged on the side wall of the cooling space 13 in a spiral shape; a plurality of placement grooves are arranged on the side wall between the annular grooves, and there are intervals between the placement grooves, and a Bernoulli nozzle 17 is arranged on the placement groove, and the Bernoulli nozzle 17 is made of heat-conducting material, and the middle part of the Bernoulli nozzle 17 is a recessed part, and the recessed part is fitted with the erbium-doped optical fiber 2 above and / or below; one end of the Bernoulli nozzle 17 is connected to the airway space 16, and the other end is arranged toward the center of the working space 12; the working space 12 is a sealed space, and the working space 12 is filled with a refrigerant;

[0017] The refrigeration assembly 3 includes a controller 31, a temperature sensor 32, a micro compressor 33, a heat dissipation pipeline 34, and a radiator 35; the temperature sensor 32 is attached to the erbium-doped optical fiber 2; the controller 31, the micro compressor 33, the heat dissipation pipeline 34, and the radiator 35 are arranged in the working space 12, and the controller 31 is electrically connected to the temperature sensor 32, the micro compressor 33, and the radiator 35 respectively, and the radiator 35 is arranged on the heat dissipation pipeline 34 and connected to the air outlet 15; the partition 11 is provided with an air inlet 18, and the air inlet 18 is coaxially arranged with the working space 12; the airway space 16 is provided with a connecting port, and the air inlet 18, the micro compressor 33, the heat dissipation pipeline 34, and the connecting port are connected in sequence;

[0018] When the high-power fiber amplifier is working, the controller 31 obtains the temperature of the erbium-doped fiber 2 in real time through the temperature sensor 32. Otherwise, it will not take any action. If the temperature exceeds the threshold, the controller 31 starts the compressor to suck the refrigerant in the working space 12 through the air inlet 18 on the partition and compress it into a high-temperature and high-pressure gas. The gas is then dissipated through the heat dissipation pipe 34 in cooperation with the radiator 35 and the air outlet 15 to obtain a medium-temperature and high-pressure liquid refrigerant. After entering the airway space 16, it expands and absorbs heat through the Bernoulli nozzle 17, causing the Bernoulli nozzle 17 to cool down. The recessed part of the cooled Bernoulli nozzle 17 fits with the erbium-doped fiber 2 above and / or below to indirectly take away the heat of the erbium-doped fiber 2.

[0019] As can be seen from the above description, by setting a placement groove between the spiral erbium-doped optical fibers 2, and setting a Bernoulli nozzle 17 in the placement groove, in conjunction with the refrigeration component 3, the micro compressor 33 can cooperate with the heat dissipation pipeline 34, so that the refrigerant can be fully compressed and dissipated through the Bernoulli nozzle 17, so that the Bernoulli nozzle 17 can quickly cool down, and the Bernoulli nozzle 17 does not directly cool the erbium-doped optical fiber 2, but uses the Bernoulli nozzle 17 as an intermediate component for indirect cooling, which can avoid the flow of fluid from interfering with the erbium-doped optical fiber 2 and affecting the amplification effect; ensure the stability of the optical fiber amplifier at high power; by setting the air inlet 18 coaxially with the working space 12, it can It is possible to achieve that airflows in all directions converge here and collide with each other to slow down, further ensuring that high-speed airflow will not affect the erbium-doped optical fiber 2; by adopting components such as a compressor, it can have a very strong cooling effect to meet the needs of high-power and long-term work, and the other end of the Bernoulli nozzle 17 is arranged toward the center of the working space 12, so that the radiant heat emitted by the erbium-doped optical fiber 2 can be quickly taken away, avoiding the problem of heat concentration and difficulty in dissipation during the long-term process, overcoming the situation in the prior art that the machine needs to be shut down to wait for cooling, and the working temperature of the high-power optical fiber amplifier can be controlled at the optimal temperature by controlling the operation of the compressor to improve efficiency.

[0020] Preferably, the surface of the erbium-doped optical fiber 2 is coated with a heat-conducting layer.

[0021] From the above description, it can be known that the heat conductive layer can make the temperature of the entire erbium-doped optical fiber 2 more uniform, thereby avoiding the problem of uneven overall temperature of the erbium-doped optical fiber 2 caused by poor thermal conductivity of the erbium-doped optical fiber 2 in the prior art.

[0022] Preferably, a super-slip coating is provided on the surface of the heat-conducting layer.

[0023] It can be seen from the above description that the provision of the super-slip coating can facilitate the insertion of the erbium-doped optical fiber 2 into the annular groove.

[0024] Preferably, the refrigeration assembly 3 further includes an electromagnetic expansion valve 36 , the electromagnetic expansion valve 36 is electrically connected to the controller 31 , and the heat dissipation pipe 34 is electrically connected to the connection port through the electromagnetic expansion valve 36 .

[0025] It can be seen from the above description that, by setting the electromagnetic expansion valve 36, its opening can be controlled by the controller 31 to achieve precise temperature control.

[0026] Preferably, a heat-insulating layer is provided on the outer shell 1 corresponding to the partition 11 and the working space 12 .

[0027] From the above description, it can be seen that by setting the insulation layer, the temperature variation can be smaller, thereby achieving better temperature control.

[0028] Preferably, a filter screen is provided on the air inlet 14 .

[0029] From the above description, it can be known that the filter can prevent debris and dust from entering the working space 12, thereby preventing the equipment from having difficulty in dissipating heat.

[0030] Preferably, an insertion track is provided on the air inlet 14, and the filter can be inserted into the insertion track.

[0031] It can be seen from the above description that the arrangement of the insertion rail can facilitate replacement and maintenance.

[0032] Preferably, the controller 31 and the micro compressor 33 are arranged close to the air inlet 14 .

[0033] It can be seen from the above description that by setting the controller 31 and the micro compressor 33, the air sucked in by the radiator 35 can be used to dissipate the heat of the controller 31 and the micro compressor 33 in advance, thereby ensuring the use effect.

[0034] Preferably, the outer shell 1 corresponding to the working space 12 is detachably connected to the outer shell 1 corresponding to the cooling space 13 .

[0035] It can be seen from the above description that the split outer shell 1 can facilitate the installation of the refrigeration component 3.

[0036] Preferably, the outer shell 1 corresponding to the workspace 12 is further provided with a display slot, a display screen 4 is provided on the display slot, the display screen 4 is electrically connected to the controller 31 , and the controller 31 displays the temperature information obtained by the temperature sensor 32 through the display screen 4 . Embodiment 1

[0037] A high-power optical fiber amplifier comprises an outer shell 1, an erbium-doped optical fiber 2 and a refrigeration component 3;

[0038] The outer shell 1 is provided with a partition 11 to divide the inner space of the outer shell 1 into a working space 12 and a cooling space 13; the working space 12 is provided with an air inlet 14 and an air outlet 15;

[0039] The cooling space 13 is in the shape of a circular groove, and an annular airway space 16 is arranged in the outer shell 1 corresponding to the cooling space 13, and the airway space 16 is arranged coaxially with the cooling space 13; the side wall of the cooling space 13 is provided with a spiral structure formed by connecting multiple layers of annular grooves end to end, and the erbium-doped optical fiber 2 is arranged on the side wall of the cooling space 13 in a spiral shape; a plurality of placement grooves are arranged on the side wall between the annular grooves, and there are intervals between the placement grooves, and a Bernoulli nozzle 17 is arranged on the placement groove, and the Bernoulli nozzle 17 is made of heat-conducting material, and the middle part of the Bernoulli nozzle 17 is a recessed part, and the recessed part is fitted with the erbium-doped optical fiber 2 above and / or below; one end of the Bernoulli nozzle 17 is connected to the airway space 16, and the other end is arranged toward the center of the working space 12; the working space 12 is a sealed space, and the working space 12 is filled with a refrigerant;

[0040] The refrigeration assembly 3 includes a controller 31, a temperature sensor 32, a micro compressor 33, a heat dissipation pipeline 34, and a radiator 35; the temperature sensor 32 is attached to the erbium-doped optical fiber 2; the controller 31, the micro compressor 33, the heat dissipation pipeline 34, and the radiator 35 are arranged in the working space 12, and the controller 31 is electrically connected to the temperature sensor 32, the micro compressor 33, and the radiator 35 respectively, and the radiator 35 is arranged on the heat dissipation pipeline 34 and connected to the air outlet 15; the partition 11 is provided with an air inlet 18, and the air inlet 18 is coaxially arranged with the working space 12; the airway space 16 is provided with a connecting port, and the air inlet 18, the micro compressor 33, the heat dissipation pipeline 34, and the connecting port are connected in sequence;

[0041] When the high-power fiber amplifier is working, the controller 31 obtains the temperature of the erbium-doped fiber 2 in real time through the temperature sensor 32. Otherwise, it will not take any action. If the temperature exceeds the threshold, the controller 31 starts the compressor to suck the refrigerant in the working space 12 through the air inlet 18 on the partition and compress it into a high-temperature and high-pressure gas. The gas is then dissipated through the heat dissipation pipe 34 in cooperation with the radiator 35 and the air outlet 15 to obtain a medium-temperature and high-pressure liquid refrigerant. After entering the airway space 16, it expands and absorbs heat through the Bernoulli nozzle 17, causing the Bernoulli nozzle 17 to cool down. The recessed part of the cooled Bernoulli nozzle 17 fits with the erbium-doped fiber 2 above and / or below to indirectly take away the heat of the erbium-doped fiber 2.

[0042] The surface of the erbium-doped optical fiber 2 is coated with a heat-conducting layer.

[0043] The surface of the heat-conducting layer is provided with a super-slip coating.

[0044] The refrigeration assembly 3 further includes an electromagnetic expansion valve 36 , which is electrically connected to the controller 31 , and the heat dissipation pipe 34 is electrically connected to the connection port via the electromagnetic expansion valve 36 .

[0045] A heat-insulating layer is provided on the outer shell 1 corresponding to the partition 11 and the working space 12 .

[0046] The air inlet 14 is provided with a filter screen.

[0047] The air inlet 14 is provided with an insertion track, and the filter net is insertably arranged on the insertion track.

[0048] The controller 31 and the micro compressor 33 are arranged close to the air inlet 14 .

[0049] The outer shell 1 corresponding to the working space 12 is detachably connected to the outer shell 1 corresponding to the cooling space 13 .

[0050] The outer shell 1 corresponding to the workspace 12 is further provided with a display slot, on which a display screen 4 is provided. The display screen 4 is electrically connected to the controller 31 , and the controller 31 displays the temperature information obtained by the temperature sensor 32 through the display screen 4 . Embodiment 2

[0051] A high-power optical fiber amplifier comprises an outer shell 1, an erbium-doped optical fiber 2 and a refrigeration component 3;

[0052] The outer shell 1 is provided with a partition 11 to divide the inner space of the outer shell 1 into a working space 12 and a cooling space 13; the working space 12 is provided with an air inlet 14 and an air outlet 15;

[0053] The cooling space 13 is in the shape of a circular groove, and an annular airway space 16 is arranged in the outer shell 1 corresponding to the cooling space 13, and the airway space 16 is arranged coaxially with the cooling space 13; the side wall of the cooling space 13 is provided with a spiral structure formed by connecting multiple layers of annular grooves end to end, and the erbium-doped optical fiber 2 is arranged on the side wall of the cooling space 13 in a spiral shape; a plurality of placement grooves are arranged on the side wall between the annular grooves, and there are intervals between the placement grooves, and a Bernoulli nozzle 17 is arranged on the placement groove, and the Bernoulli nozzle 17 is made of heat-conducting material, and the middle part of the Bernoulli nozzle 17 is a recessed part, and the recessed part is fitted with the erbium-doped optical fiber 2 above and / or below; one end of the Bernoulli nozzle 17 is connected to the airway space 16, and the other end is arranged toward the center of the working space 12; the working space 12 is a sealed space, and the working space 12 is filled with a refrigerant;

[0054] The refrigeration assembly 3 includes a controller 31, a temperature sensor 32, a micro compressor 33, a heat dissipation pipeline 34, and a radiator 35; the temperature sensor 32 is attached to the erbium-doped optical fiber 2; the controller 31, the micro compressor 33, the heat dissipation pipeline 34, and the radiator 35 are arranged in the working space 12, and the controller 31 is electrically connected to the temperature sensor 32, the micro compressor 33, and the radiator 35 respectively, and the radiator 35 is arranged on the heat dissipation pipeline 34 and connected to the air outlet 15; the partition 11 is provided with an air inlet 18, and the air inlet 18 is coaxially arranged with the working space 12; the airway space 16 is provided with a connecting port, and the air inlet 18, the micro compressor 33, the heat dissipation pipeline 34, and the connecting port are connected in sequence;

[0055] When the high-power fiber amplifier is working, the controller 31 obtains the temperature of the erbium-doped fiber 2 in real time through the temperature sensor 32. Otherwise, it will not take any action. If the temperature exceeds the threshold, the controller 31 starts the compressor to suck the refrigerant in the working space 12 through the air inlet 18 on the partition and compress it into a high-temperature and high-pressure gas. The gas is then dissipated through the heat dissipation pipe 34 in cooperation with the radiator 35 and the air outlet 15 to obtain a medium-temperature and high-pressure liquid refrigerant. After entering the airway space 16, it expands and absorbs heat through the Bernoulli nozzle 17, causing the Bernoulli nozzle 17 to cool down. The recessed part of the cooled Bernoulli nozzle 17 fits with the erbium-doped fiber 2 above and / or below to indirectly take away the heat of the erbium-doped fiber 2.

[0056] The refrigeration assembly 3 further includes an electromagnetic expansion valve 36 , which is electrically connected to the controller 31 , and the heat dissipation pipe 34 is electrically connected to the connection port via the electromagnetic expansion valve 36 .

[0057] The air inlet 14 is provided with a filter screen.

[0058] The air inlet 14 is provided with an insertion track, and the filter net is insertably arranged on the insertion track.

[0059] The controller 31 and the micro compressor 33 are arranged close to the air inlet 14 .

[0060] The outer shell 1 corresponding to the working space 12 is detachably connected to the outer shell 1 corresponding to the cooling space 13 .

[0061] The outer shell 1 corresponding to the workspace 12 is further provided with a display slot, on which a display screen 4 is provided. The display screen 4 is electrically connected to the controller 31 , and the controller 31 displays the temperature information obtained by the temperature sensor 32 through the display screen 4 . Embodiment 3

[0062] A high-power optical fiber amplifier comprises an outer shell 1, an erbium-doped optical fiber 2 and a refrigeration component 3;

[0063] The outer shell 1 is provided with a partition 11 to divide the inner space of the outer shell 1 into a working space 12 and a cooling space 13; the working space 12 is provided with an air inlet 14 and an air outlet 15;

[0064] The cooling space 13 is in the shape of a circular groove, and an annular airway space 16 is arranged in the outer shell 1 corresponding to the cooling space 13, and the airway space 16 is arranged coaxially with the cooling space 13; the side wall of the cooling space 13 is provided with a spiral structure formed by connecting multiple layers of annular grooves end to end, and the erbium-doped optical fiber 2 is arranged on the side wall of the cooling space 13 in a spiral shape; a plurality of placement grooves are arranged on the side wall between the annular grooves, and there are intervals between the placement grooves, and a Bernoulli nozzle 17 is arranged on the placement groove, and the Bernoulli nozzle 17 is made of heat-conducting material, and the middle part of the Bernoulli nozzle 17 is a recessed part, and the recessed part is fitted with the erbium-doped optical fiber 2 above and / or below; one end of the Bernoulli nozzle 17 is connected to the airway space 16, and the other end is arranged toward the center of the working space 12; the working space 12 is a sealed space, and the working space 12 is filled with a refrigerant;

[0065] The refrigeration assembly 3 includes a controller 31, a temperature sensor 32, a micro compressor 33, a heat dissipation pipeline 34, and a radiator 35; the temperature sensor 32 is attached to the erbium-doped optical fiber 2; the controller 31, the micro compressor 33, the heat dissipation pipeline 34, and the radiator 35 are arranged in the working space 12, and the controller 31 is electrically connected to the temperature sensor 32, the micro compressor 33, and the radiator 35 respectively, and the radiator 35 is arranged on the heat dissipation pipeline 34 and connected to the air outlet 15; the partition 11 is provided with an air inlet 18, and the air inlet 18 is coaxially arranged with the working space 12; the airway space 16 is provided with a connecting port, and the air inlet 18, the micro compressor 33, the heat dissipation pipeline 34, and the connecting port are connected in sequence;

[0066] When the high-power fiber amplifier is working, the controller 31 obtains the temperature of the erbium-doped fiber 2 in real time through the temperature sensor 32. Otherwise, it will not take any action. If the temperature exceeds the threshold, the controller 31 starts the compressor to suck the refrigerant in the working space 12 through the air inlet 18 on the partition and compress it into a high-temperature and high-pressure gas. The gas is then dissipated through the heat dissipation pipe 34 in cooperation with the radiator 35 and the air outlet 15 to obtain a medium-temperature and high-pressure liquid refrigerant. After entering the airway space 16, it expands and absorbs heat through the Bernoulli nozzle 17, causing the Bernoulli nozzle 17 to cool down. The recessed part of the cooled Bernoulli nozzle 17 fits with the erbium-doped fiber 2 above and / or below to indirectly take away the heat of the erbium-doped fiber 2.

[0067] The refrigeration assembly 3 further includes an electromagnetic expansion valve 36 , which is electrically connected to the controller 31 , and the heat dissipation pipe 34 is electrically connected to the connection port via the electromagnetic expansion valve 36 .

[0068] The air inlet 14 is provided with a filter screen.

[0069] The air inlet 14 is provided with an insertion track, and the filter net is insertably arranged on the insertion track.

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

Claims

1. A high power optical fiber amplifier, characterized in that: It includes an outer shell, an erbium-doped optical fiber and a refrigeration component; A partition is provided in the outer shell to divide the inner space of the outer shell into a working space and a cooling space; an air inlet and an air outlet are provided in the working space; The cooling space is in the shape of a circular groove, and an annular airway space is arranged in the outer shell corresponding to the cooling space, and the airway space is arranged coaxially with the cooling space; the side wall of the cooling space is provided with a spiral structure formed by connecting multiple layers of annular grooves end to end, and the erbium-doped optical fiber is spirally arranged on the side wall of the cooling space; a plurality of placement grooves are arranged on the side wall between the annular grooves, and there are intervals between the placement grooves, and a Bernoulli nozzle is arranged on the placement groove, and the Bernoulli nozzle is made of heat-conducting material, and the middle part of the Bernoulli nozzle is a depression, and the depression is fitted with the erbium-doped optical fiber above and / or below; one end of the Bernoulli nozzle is connected to the airway space, and the other end is arranged toward the center of the working space; the working space is a sealed space, and the working space is filled with a refrigerant; The refrigeration assembly includes a controller, a temperature sensor, a micro compressor, a heat dissipation pipeline, and a radiator; the temperature sensor is attached to the erbium-doped optical fiber; the controller, the micro compressor, the heat dissipation pipeline, and the radiator are arranged in a working space, the controller is electrically connected to the temperature sensor, the micro compressor, and the radiator respectively, the radiator is arranged on the heat dissipation pipeline and connected to the air outlet; the partition is provided with an air inlet, and the air inlet is coaxially arranged with the working space; the air duct space is provided with a connecting port, and the air inlet, the micro compressor, the heat dissipation pipeline, and the connecting port are connected in sequence; When the high-power fiber amplifier is working, the controller obtains the temperature of the erbium-doped fiber in real time through the temperature sensor. Otherwise, it will not take any action. If the temperature exceeds the threshold, the controller starts the compressor to suck the refrigerant in the working space through the air inlet on the partition and compress it into a high-temperature and high-pressure gas. The gas is then dissipated through the heat dissipation pipeline in conjunction with the radiator and the air outlet to obtain medium-temperature and high-pressure liquid refrigerant. After entering the airway space, it expands and absorbs heat through the Bernoulli nozzle, causing the Bernoulli nozzle to cool down. The recessed part of the cooled Bernoulli nozzle fits with the erbium-doped fiber above and / or below to indirectly take away the heat of the erbium-doped fiber.

2. The high power optical fiber amplifier according to claim 1, characterized in that: The surface of the erbium-doped optical fiber is coated with a heat-conducting layer.

3. The high power optical fiber amplifier according to claim 2, characterized in that: The surface of the heat-conducting layer is provided with a super-slip coating.

4. The high power optical fiber amplifier according to claim 1, characterized in that: The refrigeration component also includes an electromagnetic expansion valve, which is electrically connected to the controller, and the heat dissipation pipeline is electrically connected to the connecting port through the electromagnetic expansion valve.

5. The high power optical fiber amplifier according to claim 1, characterized in that: A heat-insulating layer is arranged on the outer shell corresponding to the partition and the workspace.

6. The high power optical fiber amplifier according to claim 1, characterized in that: A filter screen is arranged on the air inlet.

7. The high power optical fiber amplifier according to claim 6, characterized in that: The air inlet is provided with an insertion track, and the filter net is insertably arranged on the insertion track.

8. The high power optical fiber amplifier according to claim 1, characterized in that: The controller and the micro compressor are arranged close to the air inlet.

9. The high power optical fiber amplifier according to claim 1, characterized in that: The outer shell corresponding to the working space is detachably connected to the outer shell corresponding to the cooling space.

10. The high power optical fiber amplifier according to claim 1, characterized in that: The outer shell corresponding to the workspace is also provided with a display slot, and a display screen is provided on the display slot. The display screen is electrically connected to the controller, and the controller displays the temperature information obtained by the temperature sensor through the display screen.

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