理论研究了刀口测量法中激光光斑宽度测量误差与位置测量误差对光束质量因子M2、远场发散角、束腰半径以及束腰位置的测量误差的影响, 并通过光束质量分析仪对理论研究结果进行了验证。结果表明, 相比纵向位置测量误差, 激光光斑宽度测量误差对光束质量的影响更大。

In the usage of the knife-edge method, the influences of the measurement errors in the position and the light spot width on the measurement errors in the beam quality factor M2, the far field divergence angle, the beam waist radius, and the light waist position are theoretically investigated. In addition, based on the beam quality analysis instrument, the theoretical results are tested. The results show that the influence of the measurement error in the light spot width on the laser beam quality is much stronger than that in the longitudinal position.