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Method for generating third harmonic laser

A generation method and sub-harmonic technology, applied in lasers, laser parts, optics, etc., can solve the problems of large fundamental wave loss and poor stability of the resonator, and achieve the effects of avoiding damage, good stability, and easy industrial production.

Inactive Publication Date: 2008-02-06
HANS LASER TECH IND GRP CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

However, there are disadvantages of large fundamental wave loss and poor stability of the entire resonant cavity

Method used

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  • Method for generating third harmonic laser
  • Method for generating third harmonic laser
  • Method for generating third harmonic laser

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Embodiment Construction

[0030] The principle of the third harmonic laser generation method is shown in Figure 1. The fundamental wave is an oscillator with a wavelength of 1064nm, which is composed of a pump source 5, a Q switch 3, a polarizer 4, a mode-limiting aperture 2, a total reflection mirror 1, 9, and a 45-degree reflection mirror 6 on the end face. The pumping source 5 adopts the Nd:YAG rod pumped by the side of the high-power laser diode array. The thermal lens effect of the Nd:YAG rod is calculated and measured under different pump powers, and the optical matrix method is used to calculate the thermal lens effect of the laser resonator. The spatial distribution of the Gaussian mode transmission, the optimal cavity length and the curvature of the end total reflection mirrors 1 and 9 are designed, so that the infrared laser resonator can still maintain stable oscillation under a wide range of changes in the thermal lens. The calculation results are shown in Figure 2. The mode limiting apert...

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Abstract

The invention relates to a third harmonic laser generating method, which comprises a pumping resource, a Q switch, a duplex frequency nonlinear crystal, a triplicate frequency nonlinear crystal and a plurality of reflecting mirrors. The high power density fundamental wave light generated by the pumping resource pump acts on the duplex frequency nonlinear crystal so as to generate second harmonic laser; the second harmonic laser and the high power density fundamental wave light generated by the pumping resource pump synchronically is emitted into the triplicate frequency nonlinear crystal to be summed so as to generate third harmonic laser to be output out of a laser resonance cavity; the duplex frequency nonlinear crystal, the triplicate frequency nonlinear crystal and the pumping resource are all positioned in the laser renounce cavity. The present invention develops a diode array side pumping ultraviolet 355nm laser so as to get ultraviolet 355nm laser output with high basic mold and light conversion rate and long service life.

Description

technical field [0001] The invention relates to a laser generating method, in particular to a third harmonic laser generating method. Background technique [0002] In recent years, the development of laser fine processing in the world has been extremely rapid. Its market output value has surpassed laser marking, and it has become the main laser industry second only to laser cutting and welding. Short-wavelength high-power ultraviolet laser has high resolution and high absorption. It is an important development direction of laser fine processing. [0003] The prior art third harmonic laser generation methods can be classified into three types. The first one is that the double frequency and triple frequency nonlinear crystals are all outside the laser resonator. After the fundamental wave light is output by the pump source, it first acts on the double frequency nonlinear crystal to generate the second harmonic laser, and then the fundamental wave light and the second harmoni...

Claims

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Application Information

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IPC IPC(8): H01S3/109G02F1/37G02F1/35
Inventor 高云峰马淑贞路绪鹏陈莉英
Owner HANS LASER TECH IND GRP CO LTD
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