nanog mailing list archives
Re: A New TransAtlantic Cable System
From: Heath Jones <hj1980 () gmail com>
Date: Tue, 5 Oct 2010 16:33:08 +0100
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
Current thread:
- Re: A New TransAtlantic Cable System, (continued)
- Re: A New TransAtlantic Cable System nick hatch (Oct 04)
- Re: A New TransAtlantic Cable System Patrick Giagnocavo (Oct 04)
- Re: A New TransAtlantic Cable System Heath Jones (Oct 04)
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- Re: A New TransAtlantic Cable System Heath Jones (Oct 05)
- Re: A New TransAtlantic Cable System Dorn Hetzel (Oct 04)
- Re: A New TransAtlantic Cable System Randy Bush (Oct 04)
- Re: A New TransAtlantic Cable System Joe Loiacono (Oct 05)
- RE: A New TransAtlantic Cable System Rod Beck (Oct 04)
- Re: A New TransAtlantic Cable System Nick Hilliard (Oct 05)
- Re: A New TransAtlantic Cable System Chris Tracy (Oct 05)
- Re: A New TransAtlantic Cable System Heath Jones (Oct 05)
- Re: A New TransAtlantic Cable System Chris Tracy (Oct 05)
- Re: A New TransAtlantic Cable System Heath Jones (Oct 05)