@misc{indiciae510cd6c5e7c0,
  title = {Optical frequency waveguide Patent},
  author = {Chiao, R. Y. and Garmire, E. M. and Townes, C. H.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710016815},
  note = {Source identifier: 19710016815}
}