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1.444 micron nd: YAG laser therapeutic apparatus

A laser medical and laser pumping technology, applied in lasers, laser components, treatment, etc., can solve problems such as laser energy or power not increasing, human eye hazards, and poor cutting ability of biological tissues

Inactive Publication Date: 2005-05-25
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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Problems solved by technology

However, lasers in the 1.064 μm and 1.319 μm bands have good hemostatic and coagulation effects clinically, but have poor cutting ability for biological tissues; although the 1.34 μm band laser has good hemostasis, coagulation and cutting capabilities, it is easy to damage the human eye. Harmful; long-wavelength lasers such as CO 2 10.6μm, 2μm (the excitation medium is Cr, Tm, Ho:YAG) and 3μm (Er:YAG), etc., they have a large absorption coefficient for biological tissues, and have good gasification and cutting effects, but they do not penetrate biological tissues Shallow penetration depth, poor hemostatic and coagulation effects
Moreover, the laser output energy in these bands is not large, mainly because the thermal effect of these excitation media is obvious when working, which leads to the inability to increase the laser energy or power.

Method used

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  • 1.444 micron nd: YAG laser therapeutic apparatus
  • 1.444 micron nd: YAG laser therapeutic apparatus

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Embodiment Construction

[0012] The following will be specifically described in conjunction with the embodiments.

[0013] The laser crystal 2 is placed between the total reflection lens 1 and the output lens 3 . The total reflection lens 1 is a flat mirror, and the surface is coated with a film with a reflectivity of 99.8% for 1.444 μm, a transmittance of 98% for 1.0 μm and a transmittance of 80% for the 1.3 μm band, and the output lens 3 is also Flat mirror, the surface is coated with a film system with a transmittance of 95% for 1.0 μm, a transmittance of 60% for 1.3 μm, and an output coupling degree of 20% for 1.444 μm, so that it can largely suppress 1.0 μm and 1.3 μm For the vibration of the laser in the wavelength band, the distance between the total reflection mirror 1 and the output mirror 3 is 40 cm. The pumping krypton lamp 7 is sealed in a quartz glass tube doped with Eu, and is used to pump the laser crystal 2; the laser crystal 2 is a Nd:YAG laser crystal, which is used to generate part...

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Abstract

A 1.444-micron Nd:YAG laser therapy apparatus for laser operation with high staltic effect and high safety to human eyes is composed of a laser oscillator, a laser pump system, a cooling system and an optical fibre coupling system. Its dual-elliptical cavities has the reflecting Ag layer on its inner surface. The Eu doped quartz glass tube is used to filter out the pumping UV and long-wave band fluorescence from pumping lamp.

Description

technical field [0001] The laser medical machine belongs to medical equipment, especially related to laser medical equipment. Background technique [0002] In recent years, laser technology has developed rapidly. In addition to being used in the industrial field, laser technology is also widely used in communication, medical treatment, laser testing and other aspects. The scope of application in the medical field is getting wider and wider, and more and more laser bands are used, such as 1.064μm, 1.319μm, 1.34μm and so on. However, lasers in the 1.064 μm and 1.319 μm bands have good hemostatic and coagulation effects clinically, but have poor cutting ability for biological tissues; although the 1.34 μm band laser has good hemostasis, coagulation and cutting capabilities, it is easy to damage the human eye. Harmful; long-wavelength lasers such as CO 2 10.6μm, 2μm (the excitation medium is Cr, Tm, Ho:YAG) and 3μm (Er:YAG), etc., they have a large absorption coefficient for b...

Claims

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Application Information

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IPC IPC(8): A61B18/22A61N5/067H01S3/08H01S3/091H01S3/16
Inventor 林授群黄见洪郑晖林宗志
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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