[Laser] Lazer/IR long range transmitter

Sun, 22 Dec 2002 11:35:46 -0700

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". =20

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.
----- Original Message -----=20
From: "robotics" <[email protected]>
To: <[email protected]>
Sent: Sunday, December 22, 2002 7:48 AM
Subject: [Laser] Lazer/IR long range transmitter

> Hi Ron
>=20
> Have you computed the effect of temperature and density variations on =
the
> laser valocity and its ultimate effect on laser video transmission. If =
that
> is not serious than only you need is a fast laser modulator. For  =
pulsed
> lasers of several watts of power a short pulse of say 10ns with high =
repeat
> rate of say 10-20 MHz may regenerate the waveform using a peak sample =
and
> hold type arrangement but not a simple peak detector or sample and =
hold.
>=20
> I have not done this but just an idea this one is.
>=20
> I will like to make simple beacon to transmit environmental data over =
20km
> distance using a modulated light source for my radiation sensors in =
day
> light. Let us see if helogen bulb will do the trick. I may use a =
sensitive
> photo-detector to catch the signal. A 1000W helogen lamp is the stuff =
in my
> mind with a good reflector for light focus.
>=20
> Shyam
> =
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=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> Shyam Sunder Tiwari
> Managing Director
> Sensors Technology Private Limited
> AM-51, Deen Dayal Nagar
> Gwalior, MP 474020, India
> Phone: +91-751-2470680 / 5045715
> Fax:+91-751-5045716
> Email: [email protected]
> http://sensorstechnology.tripod.com/
> Planning to visit Gwalior ? Information....
> http://www.calindiatours.com/gwali.htm
> =
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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>=20
>=20
> _______________________________________________
> Laser mailing list
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