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From: jpexg@mit-hermes.ARPA (John Purbrick)
Newsgroups: net.analog
Subject: Re: Transmitting Audio signals by light
Message-ID: <2649@mit-hermes.ARPA>
Date: Fri, 16-May-86 01:16:28 EDT
Article-I.D.: mit-herm.2649
Posted: Fri May 16 01:16:28 1986
Date-Received: Sun, 18-May-86 12:30:35 EDT
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Distribution: net
Organization: The MIT AI Lab, Cambridge, MA
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> I am wondering about how to transmit aduio signals using fiber optics
> instead of wires.  The reason I would like to run fiber optics is that 
> I want to build a circut that requires many audio lines to be transmitted
> side by side, and that must be very good at rejecting a few very powerful
> radio stations in the neighborhood. (I live <1/4 of a mile away from 
> the main radio/television towers in Rochester.)  I know that it is
> possible to convert an analog signal electrical signal to an analog
> light signal, but I am not really sure how to do it.  Any suggestions?

You might do better to digitize the signal and transmit it serially. Optical
lines aren't all that efficient, and analog data might be hard to transmit
with fidelity. There are all kinds of buyable or buildable setups for optical
links.