[Laser] Lazer/IR long range transmitter

[kirk]

http://www.hut.fi/Misc/Electronics/circuits/laserlink.html

http://captain.haddock.8m.com/laser/laser1.html
A kit of parts for this project is available from:
Oatley Electronics
Phone (02) 9584 3563
Postal address (mail orders):
PO Box 89, Oatley NSW 2223.

http://strike.wu-wien.ac.at/~dusty/projekte/laserlink/index.shtml

http://www.qsl.net/wb9ajz/laser/rudolfs/

http://ronja.jikos.cz/

http://www.alphalink.com.au/~derekw/upntcvr.htm
no longer make the kit. Info to roll your own is here though. 500 meter
link.

MANUFACTURERS:
http://www.airfiber.com/
http://www.fsona.com/
http://www.irlan.co.il/
http://www.aoptix.com/
http://www.attochron.com/ (don't know if they have shipped anything yet)





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 Where the Power Goes
      Obstacle Infrared Light (765 nm) W-Band Radio (60 GHz)
      Clear, still air  -1 dB/km  -15 dB/km
      Scintillation 0 to -3 dB/km 0
      Birds or foliage  Impenetrable 0 to -20 dB
      Window (double-glazed)  -3 dB -1 dB
      Light mist (visibility 400m) -25 dB/km -1 dB/km
      Medium fog (visibility 100m) -120 dB/km -1 dB/km
      Thick fog (visibility 40m) -300 dB/km -1 dB/km
      Light rain (25mm/hour) -10 dB/km -10 dB/km
      Heavy rain (150mm/hour)  -25 dB/km -40 dB/km






-----Original Message-----
From: laser-admin@mailman.qth.net [mailto:laser-admin@mailman.qth.net]On
Behalf Of Applied Communications Services Ltd.
Sent: Sunday, December 22, 2002 11:36 AM
To: laser@mailman.qth.net
Subject: Re: [Laser] Lazer/IR long range transmitter


Hello Shyam,

Thank you for your response.  My biggest problem these days is having only a
limited amount of time to experiment.
I was hoping rather finding something available "off-the-shelf".

I have my own business which is the supply and installation of alarm and
video survellance systems.  As you may or
may not know, there is a great need for reliable, short range wireless high
speed data and video transmission systems
to work between buildings, etc.  In many cases the need is to for a
transmitter to send video across a roadway where it is not economically
feasible to run cabling.  While there are now a variety of low cost,
licence-free microwave transmission systems available, typically operating
in the 2.4 Ghz range, these systems are susceptible to interference from
microwave ovens, etc. and since there is only sufficient bandwidth available
to support four video channels,
especially in large metropolitan areas there is too much interference for
these systems to operate.  On the other hand,
if it were possible to operate via IR or laser, I thought it should be
possible to locate many wireless links in close proximity to one another and
even to multiplex multiple video channels all on the same light beam.  I
figure that the cost for such a system shouldn't be that great and the
demand would be tremendous.

I have contacts with a number of large electronics manufacturers which would
be able to mass-produce such a product
if the plans could be developed.

Best regards and Merry Christmas,

Ron, President
Applied Communications Services Ltd.




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