"Simon Robbins" wrote in message
...

"Tarver Engineering" wrote in message
...
I can see how that would work, but it would be very susceptible to
atmospheric pollution and signal degradation.

How? What you wrote is non-sensical.

I don't think so. Amplitude modulating information onto a light carrier
would mean that any atmospheric interference, such as haze, smoke, etc.
would have the effect of corrupting the modulation levels compared to the
signal carrier mean signal to noise, much like ambient RF interference has
a
huge effect on amplitude modulated radio.

The smoke and atmospheric interference you describe make the laser deginator
non-operable.

Blinking the laser, as with PCM wouldn't interfere as much since it's an
all
or nothing signal. So, providing the laser source wasn't completely
obscurred, the information would still be recoverable. The bit-rate would
presumably be fast enough that a seeker wouldn't loose lock during the
zero
states.

You miss the reason for the laser being there in the first place.