Optical add-drop multiplexer (OADM) is one of the key components for wavelength division multiplexing (WDM) system.

光分插复用器(OADM)是波分复用(WDM)系统中的关键器件之一。

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A novel method realizing chromatic dispersion compensation and optical add-drop multiplexing simultaneously in optical network has been proposed and characterized.

提出了一种在光网络中同时进行色散补偿和光分插复用的方法，并进行了特性分析。

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The basic model of planar waveguide gratings in reconfigurable optical add-drop multiplexer (ROADM) is presented. The characterization of the materials used in planar lightwave circuit is discussed.

建立了用于可重构上下路复用器(ROADM)中的平面波导光栅的基本模型，讨论了目前制备平面波导器件的主要材料及其特性。

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I had forgotten to add more oil to the drop of water to stop it from drying.

VOA: special.2009.07.25

Finally, it is okay to add a drop or two of filtered water (room temp only) on a second (technically third) taste.

FORBES: How To Taste Spirits

And, although Lennard failed with the kick, Tonga'uiha stepped up the plate in stoppage time to add the drop-goal that stretched his side's lead to 11-0.

BBC: Doncaster 27-12 Leeds Carnegie

If genetic information is kept secret from insurers, but individuals have the freedom to add or drop insurance coverage, then problems of adverse selection may arise.

ECONOMIST: Genetics, medicine and insurance