An integrated laser power detector
By using an integrated laser power detector, the problem of low transmission efficiency is solved, enabling faster and more accurate laser power measurement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI LASER BEAM OPTOELECTRONIC INSTR CO LTD
- Filing Date
- 2025-09-17
- Publication Date
- 2026-06-30
AI Technical Summary
The heat conduction time from the absorption module to the heat dissipation module in existing laser power detectors is relatively long and the conduction efficiency is low, resulting in a long thermal equilibrium time and slow response speed.
It adopts an integrated laser power detector, which integrates the absorption and heat dissipation module, laser absorption surface, cooling channel and temperature sensing module. By setting the cooling channel around the laser absorption surface and achieving uniform heat energy distribution in the absorption and heat dissipation module, the radial temperature gradient of the heat is accurately measured by the temperature sensor.
It significantly improves heat conduction efficiency, shortens thermal equilibrium time, and enhances response speed and the accuracy and rate of laser power measurement.
Smart Images
Figure CN224435574U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of laser radiation parameter measurement technology, and in particular to an integrated laser power detector. Background Technology
[0002] Currently, common laser power detectors typically adopt a split structure, where the laser absorption module and the heat dissipation module are two independent components that conduct heat through thermal contact. Due to the presence of the contact surface, a thermal resistance layer inevitably forms, resulting in a long heat conduction time from the absorption module to the heat dissipation module and low conduction efficiency. This leads to a longer thermal equilibrium time and a slower response speed for the detector.
[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model discloses an integrated laser power detector to solve the problems of long heat conduction time and low conduction efficiency from the absorption module to the heat dissipation module, resulting in long thermal equilibrium time and slow response speed of the detector.
[0005] The technical solution adopted in this utility model is as follows:
[0006] An integrated laser power detector includes:
[0007] Absorbing heat dissipation module body;
[0008] A laser absorption surface is located in the central region of the front side of the heat dissipation module body. The laser absorption surface is configured to absorb laser energy and convert it into heat energy.
[0009] A cooling channel is provided inside the heat absorption module body, and the cooling channel is configured to allow a cooling medium to be introduced to cool the heat absorption module body.
[0010] A temperature sensing module is located at the rear end of the heat absorption module body. The temperature sensing module is configured to measure the temperature difference formed on the heat absorption module body due to heat conduction.
[0011] The rear cover is located at the rear end of the heat dissipation module.
[0012] A further technical solution is that the cooling channel is arranged circumferentially around the laser absorption surface, and the top and bottom ends of the side of the heat dissipation module are respectively provided with a water inlet pipe connector and a water outlet pipe connector. The cooling channel includes a first channel, a second channel, and a third channel. The first channel is opened along the length direction at the top of the body of the heat dissipation module, and the inlet end of the first channel is connected to the water inlet pipe connector. The second channel is opened along the height direction on the side of the body of the heat dissipation module away from the water inlet pipe connector, and the inlet end of the second channel is connected to the outlet end of the first channel. The third channel is opened along the length direction at the bottom of the body of the heat dissipation module, and the inlet end of the third channel is connected to the outlet end of the second channel. The outlet end of the third channel is connected to the water outlet pipe connector.
[0013] A further technical solution is that a first circular groove is provided in the central area of the front side of the heat dissipation module, and the laser absorption surface is located at the bottom of the first circular groove.
[0014] A further technical solution is that a second circular groove is provided on the rear side of the heat absorption module body, the rear cover is inserted into the second circular groove, and the rear cover is in sealed contact with the second circular groove. The rear cover is fastened to the second circular groove by bolts.
[0015] A further technical solution is that a third circular groove is coaxially formed at the bottom of the second circular groove, and the third circular groove and the rear cover form the inner cavity of the heat absorption module. The temperature sensing module is located at the bottom end of the bottom of the third circular groove.
[0016] A further technical solution is that the temperature sensing module includes a hot-end temperature sensor and a cold-end temperature sensor. The hot-end temperature sensor is located at the bottom end of the third circular groove near the axis of the third circular groove, and the cold-end temperature sensor is located at the bottom end of the third circular groove away from the axis of the third circular groove.
[0017] A further technical solution is that an annular groove is coaxially formed on the outer side of the third circular groove, the hot end temperature sensor is located at the bottom end of the annular groove near the axis of the annular groove, and the cold end temperature sensor is located at the bottom end of the annular groove away from the axis of the annular groove.
[0018] A further technical solution is that a signal transmission cable is also provided on the side of the heat dissipation module.
[0019] The beneficial effects of this utility model embodiment are as follows:
[0020] (i) An integrated laser power detector includes an absorption and heat dissipation module, a laser absorption surface, a cooling channel, a temperature sensing module, and a back cover. The absorption and heat dissipation module adopts an integrated structure, which integrates the laser absorption surface, the cooling channel, and the temperature sensing module into the absorption and heat dissipation module. This eliminates the conduction delay caused by heat transfer between different modules through thermal contact in traditional split structures, so that the heat energy generated by the laser can be distributed more evenly and conducted more rapidly inside the absorption and heat dissipation module, which significantly improves the heat conduction efficiency. This greatly shortens the thermal equilibrium time of the detector, improves the response speed, and improves the rate and accuracy of real-time laser power measurement.
[0021] (II) Furthermore, a third circular groove is coaxially formed at the bottom of the second circular groove. The third circular groove and the rear cover together form the inner cavity of the heat dissipation module. The temperature sensing module is located at the bottom of the third circular groove. The temperature sensing module includes a hot-end temperature sensor and a cold-end temperature sensor. The hot-end temperature sensor is located at the bottom of the third circular groove near the axis of the third circular groove, and the cold-end temperature sensor is located at the bottom of the third circular groove away from the axis of the third circular groove. By setting the hot-end temperature sensor near the axis of the third circular groove and the cold-end temperature sensor away from the axis, the temperature gradient formed when the heat generated by the laser absorption surface is radially conducted within the heat dissipation module can be accurately captured. This allows for the measurement of the stable temperature difference between the hot and cold ends, reflecting the diffusion process of heat from the axis to the outside. The radially distributed temperature measurement method is consistent with the direction of heat conduction. Compared with traditional laser power detectors that measure the conduction temperature difference in the depth direction, the response is more sensitive, ensuring the accuracy and fast response characteristics of laser power calculation. Attached Figure Description
[0022] Figure 1 This is a side view of the internal structure of an integrated laser power detector according to this utility model.
[0023] Figure 2 This is a front view schematic diagram of an integrated laser power detector according to the present invention.
[0024] Figure 3 This is a rear-view internal structure diagram of an integrated laser power detector according to the present invention.
[0025] In the picture:
[0026] 100. Heat dissipation module; 101. Laser absorption surface; 102. Signal transmission cable; 103. First circular groove; 104. Second circular groove; 105. Third circular groove; 106. Annular groove; 110. Cooling channel; 111. First channel; 112. Second channel; 113. Third channel; 120. Temperature sensing module; 121. Hot end temperature sensor; 122. Cold end temperature sensor; 130. Back cover; 140. Water inlet pipe connector; 150. Water outlet pipe connector. Detailed Implementation
[0027] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.
[0028] First embodiment:
[0029] like Figures 1-2 As shown, an integrated laser power detector includes an absorption and heat dissipation module 100, a laser absorption surface 101, a cooling channel 110, a temperature sensing module 120, and a rear cover 130. Specifically, a signal transmission cable 102 is also provided on the side of the absorption and heat dissipation module 100.
[0030] like Figures 1-2 As shown, the laser absorption surface 101 is located in the central region of the front side of the heat dissipation module 100, and the laser absorption surface 101 is configured to absorb laser energy and convert it into heat energy. For example, a first circular groove 103 is formed in the central region of the front side of the heat dissipation module 100, and the laser absorption surface 101 is located at the bottom of the first circular groove 103.
[0031] like Figure 1 As shown, a cooling channel 110 is formed inside the heat absorption module 100, and the cooling channel 110 is configured to allow a cooling medium to flow through it to cool the heat absorption module 100. Specifically, the cooling channel 110 is a circulating water channel, and the cooling medium is water. An external water source is circulated into the cooling channel 110 to cool the heat absorption module 100. The cooling medium can also be an aqueous solution of ethylene glycol or a fluorinated liquid, etc.
[0032] like Figure 1 As shown, the temperature sensing module 120 is located at the rear end of the heat absorption module 100, and the temperature sensing module 120 is configured to measure the temperature difference formed on the heat absorption module 100 due to heat conduction.
[0033] like Figure 1As shown, the rear cover 130 is disposed at the rear end of the heat absorption module 100. For example, a second circular groove 104 is also provided on the rear side of the heat absorption module 100. The rear cover 130 is inserted into the second circular groove 104 and the rear cover 130 is in sealing contact with the second circular groove 104. The rear cover 130 is fastened to the second circular groove 104 by bolts.
[0034] like Figure 1 and Figure 3 As shown, further, the cooling channel 110 is arranged circumferentially around the laser absorption surface 101. The top and bottom ends of the side of the heat absorption module 100 are respectively provided with a water inlet pipe connector 140 and a water outlet pipe connector 150. The cooling channel 110 includes a first channel 111, a second channel 112 and a third channel 113. The first channel 111 is opened along the length direction at the top of the inside of the heat absorption module 100. The inlet end of the first channel 111 is connected to the water inlet pipe connector 140. The second channel 112 is opened along the height direction on the side of the inside of the heat absorption module 100 away from the water inlet pipe connector 140. The inlet end of the second channel 112 is connected to the outlet end of the first channel 111. The third channel 113 is opened along the length direction at the bottom of the inside of the heat absorption module 100. The inlet end of the third channel 113 is connected to the outlet end of the second channel 112. The outlet end of the third channel 113 is connected to the water outlet pipe connector 150. This cooling channel 110 layout forms a three-dimensional heat dissipation path by circumferentially surrounding the laser absorption surface 101. The cooling medium flows in from the top water inlet connector 140, passes sequentially through the top first channel 111, the side second channel 112 and the bottom third channel 113, and finally flows out from the bottom water outlet connector 150. The surrounding flow path can maximize the contact area and contact time between the cooling medium and the heat dissipation module 100, ensuring that the heat generated in the laser absorption area is quickly and evenly removed, thereby effectively maintaining the thermal balance of the detector.
[0035] like Figure 1As shown, further, a third circular groove 105 is coaxially formed at the bottom of the second circular groove 104. The third circular groove 105 and the rear cover 130 form the inner cavity of the heat absorption module 100. The temperature sensing module 120 is located at the bottom end of the third circular groove 105. For example, the temperature sensing module 120 includes a hot-end temperature sensor 121 and a cold-end temperature sensor 122. The hot-end temperature sensor 121 is located at the bottom end of the third circular groove 105 near the axis of the third circular groove 105, and the cold-end temperature sensor 122 is located at the bottom end of the third circular groove 105 away from the axis of the third circular groove 105. By placing the hot-end temperature sensor 121 near the axis of the third circular groove 105 and the cold-end temperature sensor 122 away from the axis, the temperature gradient formed when the heat generated by the laser absorption surface 101 is radially conducted within the heat dissipation module 100 can be accurately captured. This allows for the measurement of a stable temperature difference between the hot and cold ends, reflecting the diffusion process of heat from the axis to the outside. The radially distributed temperature measurement method is consistent with the direction of heat conduction. Compared with traditional laser power detectors that measure the temperature difference in the depth direction, this method is more sensitive and ensures the accuracy and fast response characteristics of laser power calculation.
[0036] like Figure 1 As shown, further, an annular groove 106 is coaxially formed on the outer side of the third circular groove 105. The hot-end temperature sensor 121 is located at the bottom end of the annular groove 106 near the axis of the annular groove 106, and the cold-end temperature sensor 122 is located at the bottom end of the annular groove 106 away from the axis of the annular groove 106. The arrangement of the annular groove 106 allows the hot-end temperature sensor 121 and the cold-end temperature sensor 122 to be precisely located on the radial heat diffusion path. The hot-end sensor, near the axis, directly senses the high-temperature area generated by the laser absorption surface 101, while the cold-end sensor, located on the periphery, monitors the temperature of the dissipated area. This ensures that the two measurement points are in the same continuous heat-conducting medium and are completely aligned with the heat flow direction, enabling accurate capture of the stable temperature difference signal determined by the laser power. At the same time, the annular structure enhances the reliability of the thermal contact between the sensor and the substrate, avoiding the temperature measurement delay and distortion caused by interface thermal resistance in traditional split structures, thereby improving the accuracy and response speed of laser power measurement.
[0037] In operation, this embodiment is as follows:
[0038] The laser beam irradiates the laser absorption surface 101 and is absorbed and converted into heat energy. The heat is distributed inside the heat dissipation module 100 and conducted radially outward. At the same time, the cooling medium enters from the water inlet pipe joint 140 and flows through the first channel 111, the second channel 112 and the third channel 113 in sequence to form a circulating cooling path, which continuously dissipates heat from the heat dissipation module 100. During this process, the hot end temperature sensor 121 and the cold end temperature sensor 122 located at the bottom of the third circular groove 105 detect the temperature of the area near the axis and the area away from the axis, respectively. By measuring the stable temperature difference between the two due to heat conduction, the corresponding laser power value can be calculated, thus achieving fast and accurate laser power measurement.
[0039] In this embodiment, an integrated absorption and heat dissipation module 100 is adopted, which integrates the laser absorption surface 101, cooling channel 110 and temperature sensing module 120 into the absorption and heat dissipation module 100. This eliminates the conduction delay caused by heat transfer between different modules through thermal contact in the traditional split structure, so that the heat energy generated by the laser can be distributed more evenly and conducted more quickly inside the absorption and heat dissipation module 100, which significantly improves the heat conduction efficiency. This greatly shortens the thermal equilibrium time of the detector, improves the response speed, and improves the rate and accuracy of real-time laser power measurement.
[0040] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.
Claims
1. An integrated laser power detector, characterized in that, include: Absorbing heat dissipation module body; A laser absorption surface is located in the central region of the front side of the heat dissipation module body. The laser absorption surface is configured to absorb laser energy and convert it into heat energy. A cooling channel is provided inside the heat absorption module body, and the cooling channel is configured to allow a cooling medium to be introduced to cool the heat absorption module body. A temperature sensing module is located at the rear end of the heat absorption module body. The temperature sensing module is configured to measure the temperature difference formed on the heat absorption module body due to heat conduction. The rear cover is located at the rear end of the heat dissipation module.
2. The integrated laser power detector according to claim 1, characterized in that: The cooling channels are arranged circumferentially around the laser absorption surface. The top and bottom ends of the absorption and heat dissipation module are respectively provided with an inlet pipe connector and an outlet pipe connector. The cooling channels include a first channel, a second channel, and a third channel. The first channel is opened along its length at the top of the absorption and heat dissipation module, and its inlet end is connected to the inlet pipe connector. The second channel is opened along its height on the side of the absorption and heat dissipation module away from the inlet pipe connector, and its inlet end is connected to the outlet end of the first channel. The third channel is opened along its length at the bottom of the absorption and heat dissipation module, and its inlet end is connected to the outlet end of the second channel. The outlet end of the third channel is connected to the outlet pipe connector.
3. The integrated laser power detector according to claim 1, characterized in that: The absorption and heat dissipation module has a first circular groove in the central area on the front side, and the laser absorption surface is located at the bottom of the first circular groove.
4. The integrated laser power detector according to claim 1, characterized in that: The heat absorption module body also has a second circular groove on the rear side. The rear cover is inserted into the second circular groove and the rear cover is in sealed contact with the second circular groove. The rear cover is fastened to the second circular groove by bolts.
5. The integrated laser power detector according to claim 4, characterized in that: The bottom of the second circular groove is also coaxially provided with a third circular groove, the third circular groove and the rear cover forming the inner cavity of the heat absorption module, and the temperature sensing module is located at the bottom end of the bottom of the third circular groove.
6. The integrated laser power detector according to claim 5, characterized in that: The temperature sensing module includes a hot-end temperature sensor and a cold-end temperature sensor. The hot-end temperature sensor is located at the bottom end of the third circular groove near the axis of the third circular groove, and the cold-end temperature sensor is located at the bottom end of the third circular groove away from the axis of the third circular groove.
7. The integrated laser power detector according to claim 6, characterized in that: An annular groove is coaxially formed on the outer side of the third circular groove. The hot end temperature sensor is located at the bottom end of the annular groove near the axis of the annular groove, and the cold end temperature sensor is located at the bottom end of the annular groove away from the axis of the annular groove.
8. The integrated laser power detector according to claim 1, characterized in that: The heat dissipation module is also equipped with a signal transmission cable on its side.