Measurement of Numerical Aperture.

Text Books:

  • Optical Fiber Communication – Gerd Keiser, 4th Edition, MGH, 2008.
  • Optical Fiber Communications - John M. Senior, Pearson Education, 3rd Edition, Impression, 2007.

https://circuitglobe.com/numerical-aperture-of-optical-fiber.html
https://nptel.ac.in/content/storage2/courses/117101054/downloads/lect13.pdf
https://www.digimat.in/nptel/courses/video/117104127/L01.html

https://www.youtube.com/watch?v=YUtsYkToTYI
https://www.youtube.com/watch?v=q37CpocWZyw&list=PLgwJf8NK-2e7CDIWsh61eItP9iRw1EIQc&index=14