Optical fib communication 42021/2/19 EDFA wigan equalizer Modulator a中囚 Wavelength Division multiplexer 半导体 Isolator 激光二极管 Receiver dd/drop multiplexer Dispersion compensator PMD compensator WDM demultiplexer 0XC光交叉连线1 - 4 Copyright Wang Yan 2021/2/19 Optical fiber communications