@misc{indiciae74af430abc5c,
  title = {Method and Apparatus for Linewidth Reduction in Distributed Feedback or Distributed Bragg Reflector Semiconductor Lasers using Vertical Emission},
  author = {Cook, Anthony L. and Hendricks, Herbert D.},
  year = {1998},
  url = {https://ntrs.nasa.gov/citations/19990008487},
  note = {Source identifier: 19990008487}
}