This chromatic dispersion suppresses the growth of four-wave mixing, a non-linear effect that can be particularly deleterious in dense wavelength division multiplexing (DWDM) systems.

该色散抑制了在密集波分复用（DWDM） 系统中特别有害的四波混频，非线性效应的增长。

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And the method of DDWS (direct digital wave synthesis) is adopted to realize the signals of MFSK (multi-frequency shift keying) and OFDM (orthogonal frequency division multiplexing).

采用DDWS(直接数字合成)方法，产生了MFSK (m元频移键控)和OFDM(正交频分复用)两种水声通信信号。

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Thanks to an engineer's trick called "wave division multiplexing, " a single fiber-optic thread can carry upwards of 10 trillion bits per second.

FORBES: Digital Rules

This feat (called wave-division multiplexing, or WDM) was the basis of Ciena's founding.

FORBES: Telltale numbers