[130537] in North American Network Operators' Group
Re: A New TransAtlantic Cable System
daemon@ATHENA.MIT.EDU (Heath Jones)
Tue Oct 5 11:33:17 2010
In-Reply-To: <84B0201D-8843-4DD8-926C-CBD2B400A29F@es.net>
Date: Tue, 5 Oct 2010 16:33:08 +0100
From: Heath Jones <hj1980@gmail.com>
To: Chris Tracy <ctracy@es.net>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
> Erbium Doped Fiber Amplifiers (EDFAs) do not re-shape or re-time the signals (the last 2 R's in 3R -- re-amplification, re-shaping, and re-timing)....
Thanks Chris - even more reading to do :) It's interesting stuff
that's for sure.
This is also pretty cool:
http://en.wikipedia.org/wiki/Chirped-pulse_amplification
I just had a thought about EFDA - please forgive my lack of
terminology though, i'll try to explain:
Say you have signal coming in to EFDA, the signal is just amplified
(as you said, also noise - the whole source signal).
Would it be possible to extract via PLL or similar the source clock
and use that to modulate the amplifier power?
Does it work with QPSK / whatever keying is used?
Would that even help with the noise issue at all, or am I waaaaay off?
Cheers
