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使用连续式输出的砷化镓半导体激光器泵浦的掺钕钒酸钇激光器作为光源,被动式通过轴棱锥产生Bessel光束。在激光谐振腔内加入Cr4+:YAG晶体调Q产生脉冲Bessel光束。理论模拟了1064nm波长光束经过轴棱锥之后的三维传播图和截面光强分布。通过实验得到了1064nm波长脉冲Bessel光束的脉冲宽度和脉冲重复率,并计算得到了单脉冲Bessel光束的能量和峰值功率。利用光束分析仪记录了1064nm波长Bessel光束的截面光强分布,并测量了中心光斑的直径,得到的数据与理论计算基本吻合。
A neodymium-doped yttrium vanadate yttrium laser pumped by a continuous output gallium arsenide semiconductor laser was used as a light source to passively generate a Bessel beam through the axicon. In the laser cavity by adding Cr4 +: YAG crystal Q-switched pulsed Bessel beam. Theoretical simulation of the 1064nm wavelength light beam through the axicon after three-dimensional propagation and cross-sectional intensity distribution. The pulse width and pulse repetition rate of pulsed Bessel beam with 1064nm wavelength were obtained experimentally, and the energy and peak power of single pulse Bessel beam were calculated. The beam intensity distribution of the Bessel beam with a wavelength of 1064 nm was recorded by a beam analyzer, and the diameter of the center spot was measured. The obtained data are in good agreement with the theoretical calculation.