[tt] [megascale] Laserlinks

[Eugen Leitl]

----- Forwarded message from Bryan Bishop <kanzure at gmail.com> -----

From: Bryan Bishop <kanzure at gmail.com>
Date: Wed, 7 Nov 2007 19:44:05 -0600
To: megascale at heybryan.org
Subject: [megascale] Laserlinks
User-Agent: KMail/1.9.5


0.006 AU laserlink
http://science.slashdot.org/article.pl?sid=07/11/07/1559251
http://science.slashdot.org/comments.pl?sid=353261&cid=21268441

Ronja project: 1.4 km @ 10 Mbps (nonlaser, however)
http://ronja.twibright.com/

http://mail.sjgames.com/pipermail/gurpsnet-l/2003-October/003947.html
> A fairly well focused modern laser pointed from earth to moon would
> have something like one yard wide 'point', IIRC. And this is only over
> a distance of about 200,000 miles. Laser beam sent to Pluto might well 
> spread over 16 mile radius.. 

Consider:

Very distant, very large photoreceptors to detect the signals from 
across the galaxy (would require megastructs?). What is the optimal 
networking topology for setting up a massive laser communication 
network? Laser relay stations would have to be self-maintaining in 
their orbit with respect to each other, so this means thousand-year 
cycles of communicating back and forth on positional drift and onboard 
computation to predict underlying role of gravity in moving the relay 
stations. 

Check out the thread on arocket on laser communication to moon:
http://exrocketry.net/mailman/private/arocket/2007-September/025830.html

Junk found:
http://strangepaths.com/interstellar-ark/2007/02/14/en/

- Bryan
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Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org
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