Real time active aiming?( was Re: [Laser] Laser comm stuff)

Wed, 23 Jul 2003 14:18:42 +0200

[email protected] wrote:
Hi,
I am afraid I don't fully understand. The narrowest beam will indeed be
more affected by
scattering, but if you are using a beam *expander*, shouldn't you
actually see less flutter?

Angel Vilaseca HB9SLV

>
>
> Well......Almost equal. I found that working a signal from a station using
> beam expanders was much more difficult than a signal with a 1 or 2m Rad
> divergence.  The problem appeared to be scintillation of the beam as it passed through
> the atmosphere. The 'scattering' or 'refraction' caused the narrow beam to
> flutter between no signal and full saturation. While the normal beam rarely
> moved out of the receiver lens.
>
> 73
>
> David
>
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