Looking for circuits for analog laser communication

[mehakhanda]

I m also working on laser communications if possible can anyone provide me the circuits?

 

[mishra12]

Re: Laser communications

if you want circuit diagram i have posted in this link https://www.edaboard.com/threads/193758/ if you don't understand pls ask

 

[mehakhanda]

Re: Laser communications

I m working on analog communication n i dont think for that i have to use a microcontroller

 

[zeitghost]

You can use a 555 to generate an FM signal to 100% amplitude modulate the laser diode, then use a 567 tone decoder at the receive end to demodulate the FM back to analogue.

Obviously it won't cope with much more than audio in terms of bandwidth because of the simplicity of the approach.

---------- Post added at 17:38 ---------- Previous post was at 17:24 ----------

In fact, here's a guy who's done it:

LASER LINK

By the way, the site sings at you in a remarkably irritating manner, so be warned.