Device and method for improving infrared pulse laser ablation efficiency
A pulsed laser and infrared technology, applied in the field of laser applications, can solve the problems of reduced effective energy and low ablation efficiency, and achieve the effect of simplifying the path, improving ablation efficiency, and large volume
Active Publication Date: 2015-06-24
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology
When the infrared pulsed laser operates in liquid environment conditions (water, urine, blood or mixture), most of the laser energy is consumed by the vaporization effect, so the effective energy acting on the target will be reduced, resulting in low ablation efficiency , so the thermodynamic properties of the liquid directly affect the mechanism of the laser-matter interaction
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[0018] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0019] The structure of the device for improving the ablation efficiency of infrared pulsed laser in a liquid environment provided by the present invention is as follows: figure 1 As shown, it includes a pulse delay controller 1, an infrared laser 2, a Nd:YAG laser 3, a coupler 6, a large core fiber 7 and a high-speed camera 9, and the infrared laser 2 is a holmium laser, a thulium laser or an erbium laser.
[0020] On the laser lines of the infrared laser 2 and the Nd:YAG laser 3, a beam splitter A4 and a beam splitter B5 are respectively arranged, and the laser light emitted by the two lasers is transmitted to the coupler 6 after being transmitted by the beam splitter, and the coupling The device 6 is connected to one end of the large core diameter optical fiber 7, and the other end of the large core diameter optical fiber 7 leads to the ta...
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The invention provides a device and method for improving infrared pulse laser ablation efficiency. The device at least comprises a pulse delay controller, an infrared laser device, a Nd:YAG laser device, a coupler, a large-core optical fiber and a high-speed camera. A beam splitter A and a beam splitter B are arranged on a laser line of the infrared laser device and a laser line of the Nd:YAG laser device respectively, and lasers emitted by the infrared laser device and the Nd:YAG laser device are all emitted to the coupler after the lasers are transmitted by the beam splitters. The coupler is connected with one end of the large-core optical fiber, the other end of the large-core optical fiber leads to an ablated target located in a liquid environment, the high-speed camera for capturing the ablation state of the ablated target is arranged on one side of the ablated target, and the pulse delay controller is connected with the infrared laser device, the Nd:YAG laser device and the high-speed camera through signal lines and controls the infrared laser device, the Nd:YAG laser device and the high-speed camera. By the adoption of the device and method for improving infrared pulse laser ablation efficiency, the defects in the prior art are overcome, ablation efficiency and cutting accuracy can be improved, and damage to the ablated target is reduced.
Description
technical field [0001] The invention provides a device for improving the ablation efficiency in the process of ablation of the target to be ablated by infrared pulse laser, and also provides a corresponding method for improving the ablation of infrared pulse laser in liquid environment An efficiency method belongs to the field of laser applications. Background technique [0002] Infrared pulsed lasers, such as 2.12μm holmium laser, 2.013μm thulium laser, and 2.79μm / 2.94μm erbium laser, can be absorbed by water, the main component of biological tissue, for example, the absorption coefficient of 2.94μm erbium laser is as high as 16660cm -1 , and can be used at low OH - Low-loss transmission in silica fiber or special fiber, so infrared pulse laser has been widely used in the field of biomedicine and the field of micromachining under laser liquid environmental conditions. When the infrared pulsed laser operates in liquid environment conditions (water, urine, blood or mixture)...
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IPC IPC(8): A61B18/20
Inventor 吕涛陈昉张伟
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)