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From: jim@hpmcla.UUCP
Newsgroups: net.analog
Subject: Re: Transmitting Audio signals by light
Message-ID: <1500001@hpmcla.UUCP>
Date: Thu, 15-May-86 15:54:00 EDT
Article-I.D.: hpmcla.1500001
Posted: Thu May 15 15:54:00 1986
Date-Received: Mon, 19-May-86 06:29:15 EDT
References: <335@ur-tut.UUCP>
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Nf-ID: #R:ur-tut:-33500:hpmcla:1500001:000:447
Nf-From: hpmcla!jim    May 15 11:54:00 1986

You might look into pulse width modulating the audio signal and
feeding that directly into your fiber optic cable.  It is quite 
straight forward, inexpensive, and signal recovery can be implemented
with a simple low pass filter.  Also, signal quality (low noise and
distortion) can be quite high with relatively little effort.

Circuits for pulse width modulators can be found in most college
texts on electronics as well as in many hobby books.