Re: A New TransAtlantic Cable System

[Heath Jones <hj1980 () gmail com>]

> > Would it be possible to extract via PLL or similar the source clock
> > and use that to modulate the amplifier power?

> Although you can amplify just a single wavelength with an EDFA (has to be in the 1550nm range, not 1310nm), most 
> deployments are using EDFAs in a DWDM environment.  The C-band alone consists of ~5THz (5000GHz) of spectrum between 
> 191.00-195.95 Thz.  Some systems pack 40 wavelengths into this space at 100GHz spacing, some 80 channels @ 50GHz 
> spacing, others 160 @ 25GHz.  Each of these signals is independent, they can each be using different 
> modulation/bitrate/etc.  The amplifiers are completely ignorant to what is going on with each channel, only the 
> devices performing conversion back to the electrical domain need to care about these details (after the incoming 
> light has been demultiplexed into individual signals, of course).

I'm wondering if it could be done per wavelength?
I guess that would be pretty ridiculous having demux + 160 * decoder +
160 * efda + mux..
Just wondering if the theory works though?