A laser heating device

Abstract

This utility model discloses a laser heating device, which includes N laser modules, an N×1 fiber combiner, a square uniform fiber, a collimator, an infrared temperature measurement module, and a controller. The device uses multiple laser modules combined with the collimated output of the square uniform fiber to obtain high-power square spot laser heating, thereby achieving a high heating temperature with uniform temperature field distribution.

Description

Technical Field

[0001] This utility model relates to a laser heating device and belongs to the field of laser technology. Background Technology

[0002] Laser heating offers a series of advantages, including rapid heating, high heating temperature, and precise controllable heating area, making it a promising technology for industrial and scientific research applications such as object heating and drying. Current laser heating methods primarily involve directly irradiating the object with a laser beam to raise its temperature to the desired level. However, due to the Gaussian distribution of the laser beam's light field (stronger at the center and weaker at the edges), the heating temperature field is uneven and cannot meet the requirements for uniform heating. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a laser heating device that uses multiple laser modules bundled together and collimated with a square uniform fiber to obtain high-power square spot laser heating.

[0004] As attached Figure 1 As shown, this utility model provides a laser heating device, which includes N laser modules, an N×1 fiber combiner, a square uniform fiber, a collimator, an infrared temperature measurement module, and a controller. The N silica fibers output from the N laser modules are fused to the N fibers of the N×1 fiber combiner using a fiber fusion splicing method. A single fiber is output from the N×1 fiber combiner, and the output fiber is fused to the square uniform fiber. The collimated beam obtains a square spot with a uniform light field distribution in a specific region along the axis. Under the control of the controller, the N laser modules emit lasers, which are ultimately output from a single square uniform fiber, achieving uniform heating. The infrared temperature measurement module collects the temperature of the surface of the heated object and compares it with the set heating temperature. The deviation signal is used to feedback and control the optical power output by the N laser modules, thereby obtaining a uniform heating temperature. The laser module comprises a laser module, a coupling module, and a quartz fiber. The beam output from the laser module passes through the coupling module and then enters the quartz fiber for transmission. The laser module preferably uses a semiconductor laser or a fiber laser, with an output wavelength between 300nm and 2000nm. The quartz fiber has a core diameter no greater than 400μm and a numerical aperture no greater than 0.22. The N×1 fiber combiner consists of N input fibers and one output fiber, with the core diameter and numerical aperture of the output fiber being no less than those of the quartz fiber. The square-core fiber is a square-core fiber with a side length not less than twice the core diameter of the output fiber of the N×1 fiber combiner, and its numerical aperture is not less than the numerical aperture of the output fiber of the N×1 fiber combiner. The collimator is an aspherical lens used to collimate the beam output from the square-core fiber. The infrared temperature measurement module is an infrared thermometer used to measure the surface temperature of the heated object. The controller is a microcontroller-based acquisition controller used to acquire the temperature signal obtained by the infrared temperature measurement module and control the optical power output by the laser module.

[0005] Beneficial effects: The laser heating device provided by this utility model uses a combination of multiple laser modes and collimated output of a square uniform fiber to obtain high-power square spot laser heating, thereby achieving a high heating temperature with uniform temperature field distribution. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of a laser heating device. Detailed Implementation

[0007] Example 1: A laser heating device.

[0008] As attached Figure 1 As shown, this utility model provides a laser heating device, which includes 12 laser modules, a 12×1 fiber combiner, a square uniform fiber, a collimator, an infrared temperature measurement module, and a controller. The 12 quartz fibers output from the 12 laser modules are fused to the 12 fibers of the 12×1 fiber combiner using a fiber fusion splicing method. A single fiber is output from the 12×1 fiber combiner. The output fiber of the 12×1 fiber combiner is fused with the square uniform fiber. The collimated beam obtains a square spot with a uniform light field distribution in a specific region along the axis. Under the control of the controller, the 12 laser modules emit lasers, which are ultimately output from a single square uniform fiber, achieving uniform heating. The infrared temperature measurement module collects the temperature of the surface of the heated object and compares it with the set heating temperature. The deviation signal is used to control the output optical power of the 12 laser modules, thereby obtaining a uniform heating temperature. The laser module comprises a laser module, a coupling module, and a quartz fiber. The beam output from the laser module passes through the coupling module and then enters the quartz fiber for transmission. The laser module is a semiconductor laser or a fiber laser with an output wavelength of 808 nm. The quartz fiber has a core diameter of 200 μm and a numerical aperture of 0.22. The 12×1 fiber combiner consists of 12 input fibers and 1 output fiber, with the output fiber having a core diameter of 200 μm and a numerical aperture of 0.22. The square uniform fiber is a uniformly bundled fiber with a 400 μm × 400 μm square core. The collimator is an aspherical lens with a focal length of 20 mm, used to collimate the beam output from the square uniform fiber. The infrared temperature measurement module is an infrared thermometer used to measure the surface temperature of the heated object. The controller is a microcontroller-based acquisition controller used to acquire the temperature signal obtained from the infrared temperature measurement module and control the optical power output by the laser module. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A laser heating device, characterized by The device comprises N laser modules, an N×1 fiber combiner, a square uniform fiber, a collimator, an infrared temperature measurement module, and a controller. The N silica fibers output from the N laser modules are fused to the N fibers of the N×1 fiber combiner using a fiber fusion splicing method. A single fiber is output from the N×1 fiber combiner, and this output fiber is fused to the square uniform fiber. The collimated beam, after passing through the collimator, achieves a uniformly distributed square spot in a specific axial region. Under the control of the controller, the N laser modules emit lasers, which are ultimately output from a single square uniform fiber, achieving uniform heating. The infrared temperature measurement module collects the surface temperature of the heated object and compares it with the set heating temperature. The deviation signal is used to control the output optical power of the N laser modules, thereby obtaining the desired heating temperature. The laser module comprises a laser module, a coupling module, and a quartz fiber. The laser beam output from the laser module passes through the coupling module and then enters the quartz fiber for transmission. The laser module is a semiconductor laser or a fiber laser, with an output wavelength between 300nm and 2000nm. The core diameter of the quartz fiber is no greater than 400μm, and the numerical aperture is no greater than 0.

22. The N×1 fiber combiner consists of N input fibers and one output fiber, with the core diameter and numerical aperture of the output fiber being no less than those of the quartz fiber. The square fiber bundle is a square-core fiber bundle, with the side length of the square core being no less than twice the core diameter of the output fiber of the N×1 fiber combiner, and its numerical aperture being no less than that of the output fiber of the N×1 fiber combiner. The collimator is an aspherical lens. The infrared temperature measurement module is an infrared thermometer. The controller is a microcontroller-based data acquisition controller.

Images