Re: questions about light

laura wrote:
Here is the problem:

I have multiple signals that are travelling through my device. When
the signals reach a "node" I must "mark" the signals so that I know
that they have passed through that node. Also, in some cases the
signals must be (divided / multiplied) and then sent to other "nodes".

Here are the basic properties that I need:

[Discussion of properties deleted for sake of brevity]

I have imagined a simple way to do this: by using light rays which
have different wave-lengths. When the rays are passing through a
"node" I will mark them by increassing their wave-length with a
certain value. And then I divide those rays by using the devices that
you have already suggested.

I don't know too much physics and this is why I needed some answers
from you.

Is there any other way to do this?
Are there other properties of light which I can count on?
Are there other type of fast signals that I can use?

Thanks a lot,
Laura

I am still not sure about the application of your device, but unsless this
is some sort of optical experiment, I think you could set up this much
easier and cheaper in a comupter environment, where the nodes are simple
prosessors (small computers), and the connetion between then cheap coaxial
cabels. A signal traveling through a coax cable propagets with something
very close to light speed; so the advantage of using an optical cable is not
speed, but capacity (bandwidth), less signal loss and low signal energy .
However, 10^4 different sginal should be no problem with a coax cable.

Best wishes,
Blackbird


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