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不久前，全光网络的概念已经是很明显的、不可逆转的了。唯一的问题在于：“哪一种元件级的技术最适合于光纤网络？”自从出现光纤网络以来，很多事情已经发生了变化。市场低迷加上从光-电-光到纯光纤技术转变的艰巨任务，已经使人们对全球全光网络的期望冷却下来。光交换机的
Not long ago, the concept of all-optical network has been very obvious, irreversible. The only question is: “What kind of component-level technology is best suited for optical networking?” Many things have changed since the advent of optical networking. The downturn coupled with the daunting task of transitioning from light-electricity-light to pure-fiber technology has cooled the expectations of the world’s all-optical network. Optical switch