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.
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[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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