>> 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?
