Medical 2.79-micrometer electro-optical Q-switched Cr, Er: YSGG laser device

A laser and electro-optic technology, applied in the direction of lasers, laser parts, phonon exciters, etc., can solve the problems of laser energy and peak power, and greatly increase it, and achieve stable and reliable long-term work, short pulses, and high energy. Effect

Inactive Publication Date: 2013-07-31
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

Subsequently, the Q-switched laser in the 2.79 μm band is limited by the low damage threshold of infrared electro-optic crystals, and it is difficult to greatly increase the laser energy and peak power in this band

Method used

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  • Medical 2.79-micrometer electro-optical Q-switched Cr, Er: YSGG laser device
  • Medical 2.79-micrometer electro-optical Q-switched Cr, Er: YSGG laser device
  • Medical 2.79-micrometer electro-optical Q-switched Cr, Er: YSGG laser device

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Embodiment Construction

[0028] Such as figure 1 As shown, the present invention consists of a full anti-cavity plate 1, a Q-switching crystal 2, a polarizer 3, a xenon lamp 4, a laser rod 5, a light-gathering cavity 6, a wave plate 7, an output cavity plate 8, and a voltage-reducing Q-switching circuit board 9 , Laser power supply 10 and laser water cooling system 11 constitute.

[0029] The xenon lamp 4 is placed in parallel under the laser rod 5, and the laser rod and the xenon lamp are installed in the light-concentrating cavity 6 at the same time. Pumping; the laser water cooling system 11 is connected to the inside of the light collecting cavity 6 to provide constant temperature cooling for the laser rod; the wave plate 7 uses a 1 / 4 wave plate to compensate for the thermal depolarization problem under high pump power; The polarizer 3 adopts 2 to 5 pieces of white gemstones (Al 2 o 3 ) and other materials are used to generate linearly polarized light; the Q-switching crystal 2 and the polarize...

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Abstract

The invention discloses a medical 2.79-micrometer electro-optical Q-switched Cr, Er: YSGG (Erbium, Chromium: Yttrium-Scandium-Gallium-Garnet) laser device which comprises a total reflection cavity sheet, a Q-switched crystal, a polarizer, a xenon lamp, a laser rod, a condensation cavity, a wave sheet, an output cavity sheet, a laser power supply and a laser water cooling system, wherein the laser rod and the xenon lamp are mounted in parallel in the condensation cavity, and connected with the water cooling system; the water cooling system cools the condensation cavity, and the laser rod and the xenon lamp in the condensation cavity; the laser power supply provides electric energy for the xenon lamp, and has a function of coordination, such as controlling the xenon lamp, an electro-optical Q switch, and the water cooling system; a Q-switched power supply in the power supply controls the opening time of the electro-optical Q switch, provides Q-switched high voltage, and is connected with two electrodes of the Q-switched crystal; the two electrodes are positioned on the two sides of the Q-switched crystal, and clung to the surface of a Y-Z plane of the Q-switched crystal, and are parallel to a laser oscillation path; the electro-optical Q switch consists of the polarizer and the electro-optical Q-switched crystal; the Q-switched crystal is a lanthanum gallium silicate (LGS) crystal; the laser rod is a Cr, Er: YSGG laser crystal; and the wave sheet is a 1/4 wave sheet. The laser device has the characteristics of stable output power, and uniform light spot intensity distribution.

Description

technical field [0001] The invention relates to a medical 2.79 μm electro-optic Q-switched Cr, Er: YSGG (Erbium, Chromium: Yttrium-Scandium-Gallium-Garnet) laser. Background technique [0002] The 2.79μm wavelength YSGG erbium laser has important applications in biomedicine, scientific research, military and other fields. Due to the effective absorption of this wavelength of laser light by water and hydroxyapatite, it can be used for precise cutting or ablation of tissues such as cornea, teeth and bones. It is an ideal medical laser source for precise cutting or ablation. In addition, the 2.79μm pulsed laser with high peak power and high pulse energy can also be used as a pump source for an optical parametric oscillator to obtain a sufficiently strong 3-12μm mid-infrared laser for long-distance atmospheric detection, toxic gas detection, photoelectric It has important applications in fields such as confrontation. Therefore, the development of 2.79μm narrow pulse, high ene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/115H01S3/16H01S3/13
Inventor 杨经纬江海河吴先友王礼
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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