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From: dlbres10@pc.usl.edu (Fraering Philip)
Newsgroups: sci.physics,sci.electronics
Subject: Re: Lasers for communication
Message-ID: <DLBRES10.90Sep20174906@pc.usl.edu>
Date: 20 Sep 90 22:49:06 GMT
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	<7504@milton.u.washington.edu> <30638@nigel.ee.udel.edu>
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In-reply-to: berryh@udel.edu's message of 17 Sep 90 00:03:00 GMT

In article <30638@nigel.ee.udel.edu> berryh@udel.edu (John Berryhill) writes:

jb>Followup-To: sci.garbage 

(nice try)
  
jb>In other words, let the HeNe stay on all the time and use something
jb>in beam path that can either deflect the beam (an acousto-optic
jb>modulator for instance) or vary its opacity (an LCD window with a
jb>polarizer crossed wrt the LCD).

Isn't the laser beam polarized already?