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Electro-optical Q-switched pulsed laser, method and laser medical treatment equipment of using electro-optical Q-switched pulsed laser

A pulsed laser, electro-optic modulation technology, applied in the field of laser medical treatment, can solve problems such as single treatment function

Inactive Publication Date: 2018-06-01
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most laser medical machines on the market today can only output one or two fixed wavelengths, and the treatment function is relatively single

Method used

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  • Electro-optical Q-switched pulsed laser, method and laser medical treatment equipment of using electro-optical Q-switched pulsed laser

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] As a specific embodiment, when the electro-optic Q-switched pulse laser with variable output wavelength in the specific embodiment of the application is applied to the laser medical machine, the working wavelength, pulse width and repetition frequency of the laser are determined according to the application requirements of the laser medical machine And other index parameters, and then determine the main design requirements of the laser components. The designed laser can adopt different pumping modes according to the application requirements. figure 1 The more direct end pumping method is adopted in the method, the pump light PL is injected along the symmetry axis o of the resonator OC, and enters the laser working medium LM after passing through the laser total reflection mirror CM, so that the laser working medium LM is in an excited state; the laser total reflection mirror The CM includes optical end faces f1 and f2. The optical end face f1 is not coated or is coated ...

Embodiment 2

[0063] 1064nm and 1319nm electro-optic Q-switched Nd:YAG pulsed lasers

[0064] The structure of the electro-optic Q-switched pulsed laser with variable output wavelength is the same as that in Embodiment 1. The f2 end face of the laser total reflection mirror CM is coated with a total reflection optical film for 1064nm and 1319nm. Nd:YAG laser crystal is used as the laser working medium LM, the optical end surface of the laser working medium LM is coated with anti-reflection optical film for 1064nm and 1319nm, the optical polarizers P1 and P2 use optical polarizing prisms, and the birefringence filter is made of quartz crystal LN crystal is used to process the electro-optical modulation Fabry-Perot effect etalon with longitudinal modulation, the distance between the optical end faces f9 and f10 is 0.01mm, and the optical end faces f9 and f10 are plated with ring electrodes to apply the electric field. The clear aperture is coated with a highly reflective optical coating fo...

Embodiment 3

[0066] Electro-optic Q-switched Yb:YAG pulsed laser in 1μm band

[0067] The structure of the electro-optic Q-switched pulsed laser with variable output wavelength is the same as that in Embodiment 1. The f2 end face of the laser total reflection mirror CM is coated with an optical film that totally reflects in the range of 1040nm±10nm. Yb:YAG laser crystal is used as the laser working medium. The optical end surface of the laser working medium LM is coated with an anti-reflection optical film for the range of 1040nm±10nm. The electro-optic modulation Fabry-Perot effect etalon is processed with LN crystal, and its side parallel to the laser optical axis is coated with a pair of opposite metal electrodes to apply the transverse electro-optic modulation electric field, and the optical end faces f9 and f10 are coated with 1040nm ± 10nm high reflective optical film, the distance between the two optical end faces is 5mm. According to the manual attached figure 1 The laser medi...

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Abstract

The invention discloses an electro-optical Q-switched pulsed laser capable of being applied to a laser medical treatment purpose, and the wavelength of laser output by the electro-optical Q-switched pulsed laser is variable. The electro-optical Q-switched pulsed laser comprises a reflector, a laser working medium, a first optical polarizer, a birefringent filter, a second optical polarizer and anelectro-optical modulation fabry-perot effect etalon which are sequentially arranged along the laser axis direction from a pump light source end to a laser output end. According to the electro-opticalQ-switched pulsed laser, the working wavelength of a laser medical treatment machine is selected through changing the birefringent filter according to the requirements of laser medical treatment, andmeanwhile, output of the laser with the working wavelength is controlled through changing the strength of an electric field applied to the electro-optical modulation fabry-perot effect etalon, so that narrow-pulse and high-peak power medical treatment laser output is achieved.

Description

technical field [0001] The application relates to an electro-optic Q-switched pulsed laser medical device, which belongs to the technical field of laser medical treatment. Background technique [0002] High peak power lasers are widely used in the medical field, and have outstanding therapeutic effects in tissue cutting and pigment bleaching. The generation of high peak power laser is mainly realized by means of electro-optic modulation, acousto-optic modulation and mechanical modulation. At present, the mainstream high peak power laser medical machine is mainly based on electro-optic modulation. However, the current mature laser medical machines often cannot achieve both performance and economy. [0003] Lasers of different wavelengths have different effects on biological tissues, so they can play different roles in medical applications. For example, some wavelengths of lasers are better for tissue cutting, and some can quickly and effectively achieve hemostasis. , and so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/115H01S3/106H01S3/10H01S3/06G02F1/03A61B18/22A61B18/20
CPCH01S3/115A61B18/20A61B18/22A61B2018/00696A61B2018/202A61B2018/2065G02F1/03H01S3/0621H01S3/10H01S3/10061H01S3/1062
Inventor 黄凌雄张戈李丙轩廖文斌
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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