@misc{indiciaecdcf3405983f,
  title = {Axially symmetric on-axis flat-top beam.},
  author = {Q Cao and S Chi},
  year = {2000},
  doi = {10.1364/josaa.17.000447},
  url = {https://pubmed.ncbi.nlm.nih.gov/10708024/},
  note = {Source identifier: 10708024}
}