激光光束传输特性分析─—等效波面曲率半径法

本文提出了利用光束等效波面曲率半径,并结合束宽及远场发散角来测量分析激光光束传输特性的方法,能以较高的精度确定激光光束的束腰位置z0,束腰处的束宽D0及激光光束质量传输因子M2.这是一种可用于连续,重复频率脉冲及单脉冲激光光束传输特性的分析测量方法。文中还给出了实现这一方法的具体测量方案。

Laser beam analysis──the beam effective radius approach

A laser beam analysis method is proposed by using the beam effective radius R(z)with the measurements of beam width d(z)and beam divergence angle θ.The location of the beam z⁰ and the times-diffraction-limit-factor M² can be determined with relative high accuracy. The method is usable for CW Iaser beam,repetition pulsed laser beam and single pulsed laser beam.Two practical apparatus designs are also proposed.