N. Antoniades et al., SIMULATION OF ASE NOISE ACCUMULATION IN A WAVELENGTH ADD-DROP MULTIPLEXER CASCADE, IEEE photonics technology letters, 9(9), 1997, pp. 1274-1276
This letter presents a computer simulation of a cascade of wavelength
add-drop multiplexers (WADM's) each consisting of optical amplifiers,
a multiplexer/demultiplexer pair, gain equalizing attenuators and 2 x
2 optical switches. It is shown that one of the eight wavelengths can
propagate through more than 50 equidistant WADM's in a wavelength-divi
sion multiplexed (WDM) optical network before its optical signal-to-no
ise ratio (SNR) drops below acceptable levels, These simulations indic
ate that a national scale transparent WDM network is feasible.