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Electro-optic Q-switched tunable laser and method, and laser medical equipment using same

A tuning laser and electro-optic modulation technology, applied in the field of laser medical treatment, can solve problems such as inconvenient operation, high equipment price, and insufficient laser wavelength tunable range to support multiple treatment purposes, etc., to achieve the effect of large degrees of freedom

Active Publication Date: 2020-04-07
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

[0003] Continuously tunable lasers can change the wavelength of the output laser within a certain wavelength range. However, there are great limitations in using it as a laser medical machine. The tunable range of laser wavelengths is often not enough to support multiple therapeutic purposes, and the structure The complex and technical reasons will make this type of equipment expensive and inconvenient to operate

Method used

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  • Electro-optic Q-switched tunable laser and method, and laser medical equipment using same

Examples

Experimental program
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Effect test

Embodiment 1

[0060] As a specific implementation, when the electro-optic Q-switched tunable laser in the specific implementation of the application is applied to the laser medical machine, according to the application requirements of the laser medical machine, the index parameters such as the working wavelength, pulse width, and repetition frequency of the laser are determined. 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 pump light LP is injected along the symmetry axis CA of the resonator, and enters the laser working medium LM after passing through the laser total reflection mirror M1, so that the laser working medium LM is in an excited state; the laser total reflection mirror M1 Including optical end faces f1 and f2, the optical end face f1 is not coated or coated with an optical film for anti-reflection of the pump light LP, and the optical end face f2 ...

Embodiment 2

[0065] 1064nm and 1319nm electro-optic Q-switched Nd:YAG laser medical machine

[0066] The structure of the electro-optic Q-switched tunable laser is the same as that in Embodiment 1. The f2 end face of the laser total reflection mirror M1 is coated with a total reflection optical film for 1064nm and 1319nm. Nd:YAG laser crystal is used as the laser working medium LM, and the optical end surface of the laser working medium LM is coated with an anti-reflection optical film for 1064nm and 1319nm, and two identical electro-optical modulation F-P etalons Q1 and Q2 are processed with LN crystal, two The optical end faces of the etalon are coated with optical films with high reflection to 1064nm and 1319nm, and metal electrodes are coated on the sides of the two etalons parallel to the laser optical axis to apply a transverse electro-optic modulation electric field perpendicular to the direction of the laser optical axis. In this embodiment, the electro-optic modulation F-P etal...

Embodiment 3

[0068] 1μm band electro-optic Q-switched Yb:YAG laser medical machine

[0069] The structure of the electro-optic Q-switched tunable laser is the same as that in Embodiment 1. The f2 end face of the laser total reflection mirror M1 is coated with an optical film for total reflection in the range of 1040nm±10nm. Yb:YAG laser crystal is used as the laser working medium, and two electro-optic modulation F-P etalons Q1 and Q2 are processed with LN crystal. The optical end faces of the two etalons Q1 and Q2 are coated with an optical film with high reflection in the range of 1040nm±10nm. The electro-optical modulation F-P etalon Q1 has an electrode with a light-through hole in the center of the optical end faces f5 and f6 to apply a longitudinal modulation electric field. In this embodiment, the distance between the optical end faces f5 and f6 is 2mm, and the electro-optic modulation F-P etalon Q2 is connected to the laser light. The side parallel to the axis is plated with a pa...

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Abstract

The invention discloses an electro-optic Q-modulated tunable laser with a variable wavelength and the laser can be applied to a laser medical purpose. The electro-optic Q-modulated tunable laser comprises a reflecting mirror, a laser working medium, a first electro-optic modulation Fabry-Perot effect etalon and a second electro-optic modulation Fabry-Perot effect etalon which are successively arranged from a pump light source end to a laser output end along a laser optical axis direction. Whether the electro-optic Q-modulated tunable laser outputs a laser whose wavelength can be tuned continuously or outputs several specific wavelengths depends on the adopted laser working medium. The invention also discloses an electro-optic Q-modulated tunable laser outputting method. In the method, through changing intensities of electric fields where the first electro-optic modulation Fabry-Perot effect etalon and the second electro-optic modulation Fabry-Perot effect etalon are located, different wavelengths and output modes are selected. The invention also discloses a laser medical machine adopting the laser and / or the method.

Description

technical field [0001] The application relates to an electro-optical Q-switched tunable laser medical device, which belongs to the technical field of laser medical treatment. Background technique [0002] 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 some are outstanding in pigment bleaching, so for different medical purposes, it is necessary to choose a laser medical machine with a suitable wavelength. Most of the laser medical machines on the market today can only output one or two fixed wavelengths, and the treatment function is relatively single. If the laser medical machine can output lasers of several different wavelengths, it may have two or more treatment functions, and it may simplify the entire treatment process and improve the treatment effect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/115H01S3/106H01S3/107
CPCH01S3/1062H01S3/107H01S3/115
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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