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在高功率激光近场光束质量的测量中,光楔起着重要的作用。针对聚焦光束近场质量的测量须满足大倍率衰减和共轭测量的要求,提出“大角度成对使用光楔并利用90°石英旋光片”的测量方法,并通过实验验证了该方法能真实地测量出近场光束质量。这种测量方法对于近场光束质量尤其是聚焦光束近场质量的测量具有参考价值。
Optical wedges play an important role in the measurement of the beam quality of high-power laser near-field beams. The measurement of the near-field mass of the focused beam must satisfy the requirement of large-rate attenuation and conjugate measurement. The method of “using large-angle optical wedges in pairs and using 90 ° quartz polarizer” is proposed and the method is validated experimentally Can truly measure the near-field beam quality. This measurement method has reference value for the measurement of the near-field beam quality, especially the near-field beam quality of the focused beam.