A loooooong time ago (in the early age of fiber optics) I saw a news item
about a fiber optics connected telephone that was working at the end of a
1km cable.  There was enough energy coming to the phone to power it (along
with the received signal) and send a modulated transmit signal that was
detected at the powered end.  It was an amazing "proof of concept".

Good luck finding more information about it . . .
Carl



Carl Van Wormer
Cipher Systems
1815 NW 169th Place, Suite 5010
Beaverton, OR  97006
Phone (503)-617-7447    Fax (503)-617-6550



-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Donald Durett
Sent: Wednesday, June 25, 2003 7:58 AM
To: [log in to unmask]
Subject: Re: [TN] Power over Fiber Optic cable


Depends on how much and what kind of power. You can not get more power out
than you put in minus transmission losses. One proposal is to use the
optical fiber as the center conductor of a microwave coaxial cable. The
fiber will need to be clad with a coating of silver or other low resistance
conductor. Use the coax ass'y to transmit RF power than convert it at the
other end.

Donald Durett
Engineering Manager
Astrolab Inc.
4 Powderhorn Drive
Warren, NJ  07059-5105

Tel:  732-560-3800
Fax: 732-560-9570


-----Original Message-----
From: McGlaughlin, Jeffrey A [mailto:[log in to unmask]]
Sent: Wednesday, June 25, 2003 10:44 AM
To: [log in to unmask]
Subject: [TN] Power over Fiber Optic cable

Is anyone out there doing this...

Has anyone worked with or heard of a process for transmitting power over a
fiber-optic cable? I believe the theory behind this is to transmit light
over a cable and then convert it to power via a photovoltaic cell or
something similar. I need to respond to a question on a proposal on this
subject today.

If you have any information on this topic, please let me know.

Thanks,

Rob

Robert E. Zimmer
Research Scientist
Battelle


Jeffrey A McGlaughlin, CID
Engineering Designer
Battelle Memorial Institute
Columbus Ohio
http://www.battelle.org <http://www.battelle.org> [log in to unmask]

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