Applied Physics B

, 123:233 | Cite as

In situ measurement of laser beam quality

  • Somayeh Sadat Hashemi
  • Saeed Ghavami Sabouri
  • Alireza Khorsandi


An innovative optical method is introduced for the beam quality measurement of any arbitrary transverse mode based on the reconstruction of the mode from a few-frame image of the beam cross-section. This is performed by the decomposition of a mode to its basic Hermite–Gaussian modal coefficients. The performance of the proposed method is examined through M 2-factor measurement of the beam of a Nd:YAG laser which was forced to oscillate in a certain mode using a crossed rectangular intracavity aperture. Obtained results have shown that this method can be alternatively replaced for the hologram- and ISO-based techniques recently exploiting for beam quality measurement regardless of the mode type and the position of utilized CCD camera along the beam direction.

Supplementary material

Supplementary material 1 (MP4 47917 kb)


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Copyright information

© Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  1. 1.Department of PhysicsUniversity of IsfahanIsfahanIslamic Republic of Iran

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