None of this is remotely new or interesting. I was doing IP-over-laser-light at Ethernet speeds over kilometer distances using free-space optics thirty years ago, and even then it wasn't a new technology.

It's interesting for a hobby tinkering project. Basically like rudimentary transmitters for ham radio. Understand the fundamentals, then you can move on to better quality DIYs

Was that RONJA [1]?

[1]: http://ronja.twibright.com/about.php

Thank you for your valuable contribution to this conversation.