Metric for the measurement of the quality of complex beams: a theoretical study.

@article{Kaim2015MetricFT,
  title={Metric for the measurement of the quality of complex beams: a theoretical study.},
  author={Sergiy Kaim and Julien Lumeau and Vadim Smirnov and Boris Ya Zeldovich and Leonid B. Glebov},
  journal={Journal of the Optical Society of America. A, Optics, image science, and vision},
  year={2015},
  volume={32 4},
  pages={538-48}
}
We present a theoretical study of various definitions of laser beam width in a given cross section. Quality of the beam is characterized by dimensionless beam propagation products (BPPs) Δx·Δθ(x)/λ, which are different for the 21 definitions presented, but are close to 1. Six particular beams are studied in detail. In the process, we had to review the properties for the Fourier transform of various modifications and the relationships between them: physical Fourier transform (PFT), mathematical… CONTINUE READING