[Laser] Re : Re : Cloud Bounce, Comm or Distance

[f1avyopto at aol.com]

Hi Mike.
I have got a laser Ceilograph very similar the yours and made by 
"Impulsphysic" corp.
It comes from army surplus.
It was installed in the Sarajevo airport during the Kosovo war.
If you have a look in this old presentation you could have a way to use 
it simply with an high speed oscilloscope at the APD amplifier output :
http://sd-1.archive-host.com/membres/up/22679775843705539/CBUKV2_42.pdf
The local air scattering gives a strong pulse at the beginning of the 
light packet travel.
This pulse can simply synchronise the oscilloscope in internal synchro 
mode.
I could see on the scope screen the clouds layers position and density 
to more 6000 m ASL.
The pulsed laser is an AsGa heterostructure diode with 40A current 
pulse during 80 nS.
The peak optical power of the pulse is 18W but the averaged power is 
less than 1 mW so in a 140 mm in diameter aperture this laser is fully 
eye safe.
73
Yves F1AVY

-----E-mail d'origine-----
De : Mike <mikecouture at bellsouth.net>
A : 'Free Space LASER Communications' <laser at mailman.qth.net>
Envoyé le : Samedi, 18 Septembre 2010 19:15
Sujet : Re: [Laser] Re :  Cloud Bounce, Comm or Distance


Dave, Yves, Chris, Clint, James, Tom,

Thanks guys, looks like it's back to the drawing table and dust off
some of
these books I have. I really appreciate the, obviously, well thought out
responses. So now it's my turn to get busy.

Just for grins, here's a link to my site with a series of pictures of a
shipboard cloud bounce laser system I picked up surplus from the
government.
Sad thing is I have NOT been able to get any technical information or a
manual. Cost is NOT a problem for the manual. Sure would be nice to do
some
'bouncing' with this thing. Any leads would be greatly appreciated.

Link: http://www.mgte.com/cloud/

Mike C.
(sandbar west, FL)

(Twinkle, twinkle,.....)




-----Original Message-----
 From: laser-bounces at mailman.qth.net
[mailto:laser-bounces at mailman.qth.net]
On Behalf Of f1avyopto at aol.com
Sent: Saturday, September 18, 2010 3:26 AM
To: laser at mailman.qth.net
Subject: [Laser] Re : Cloud Bounce, Comm or Distance

Hi all.
To add some considerations about cloud bounce it is possible to precise
these points;
The cloud bounce efficiency depends very strongly of the aerosol limit
/www.qsl.net/donate.html

< snip >

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