>
> Not yet, when I tune the receiver to be insensitive to daytime light, it
> can pick up my beam 10m away.  If it is tuned to be sensitive to my
> beam, the daytime light saturated the Rx.


What are you using as a detector?
The problem here is that light varies tremendously during the day, if I
remember right it's something like 10,000-1 ratio.

Going with a laser gets you more output per watt in, but it is also
spectrally narrow, allowing you to use narrow bandpass optical filters to
cut out most of the ambient light.

Edmund scientific is a pretty good source on optics and filters.
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