With the WDM(Wavelength Division Multiplexing)technology based on EDFA(Erbium Doped Fiber Amplifier) developing, it is possible to use multiple wavelengths to transmit over the same optical fiber.

• 基于掺铒光纤放大器(EDFA)的波分复用技术(WDM)的出现，使得在同一根光纤中能传输多个波长的光波信号。