[Laser] Lazer/IR long range transmitter

Mon, 23 Dec 2002 09:23:14 -0800

http://www.laserbitcommunications.com/
http://www.lsainc.com/products/connectivitysolutions/highperflacomm/overview/hplc_geninfo.html
http://www.canon.com/bctv/canobeam/top.html


kirk wrote:

>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)
>
>
>
>
>
>----------------------------------------------------------------------------
>----
>
> 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: [email protected] [mailto:[email protected]]On
>Behalf Of Applied Communications Services Ltd.
>Sent: Sunday, December 22, 2002 11:36 AM
>To: [email protected]
>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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