@misc{indiciae3ba1d7ad87ec,
  title = {Fiber and diffused waveguide structures for distributed-feedback lasers},
  author = {Elachi, C. and Evans, G. and Yeh, C.},
  year = {1975},
  url = {https://ntrs.nasa.gov/citations/19750048337},
  note = {Source identifier: 19750048337}
}