Specialized English on Communication Engineering
No matter what application it is that is generating traffic, most of this traffic will be carried by the unifying optical layer. 不管是哪一种产生业务的应用，大多数这种业务将会由统一 的光层进行传送。
Specialized English on Communication Engineering
The current explosion of traffic in the worldwide networks is ample evidence of the speed with which we are adopting new communications technologies. The growth of wireless systems and the Internet are well-documented phenomena. explosion ：爆发，激增 traffic ：交通, 通行, 运输, 贸易,交易, (电信)业务 wireless systems ：无线系统 目前全球网络业务的激增充分地表明了我们采用新的通信技术 的速度。无线系统和因特网的发展就是很好的证明。
exponential adj. 指数的，幂的
Specialized English for Communication Engineering
Even visionaries such as Albert Einstein and Isaac Newton, who contributed significantly to our understanding of the properties of light and its fundamental importance, would not likely imagine the communications networks of today. visionary ：空想家, 梦想者, 好幻想的人 fundamental ：基础的, 基本的 爱因斯坦和牛顿在我们对光特性的了解及其基本重要性方面 做出了重大的贡献，即使是这样富于幻想的人也不大可能想 象的到今天通信网络发展的程度。
without affecting one another, so several channels of
l information (each having a dif话fe音rent carrier wavelength)
can be transmitted simultaneou数sl据y over a s0ingle fiber. This
Specialized English on Communication Engineering
For this reason, the growth of various applications such as telephony (whether cellular or fixed), Internet, video transmission, computer communication and database access leads directly to an increase in the demand placed on the optical network. telephony ：电话学, 电话, 电话通讯 由于这一原因，各种应用的增长，如电话（移动或固定）、 因特网、视频传输、计算机通信和数据库接入直接导致对光 网络持续增长的需要。
n. 等价物, 相等物
video n. (adj.) 电视（的），视频（的），影像（的）
approximate adj. 近似的，大概的 adv. ~ly
boost
v. 推进，增加，提高
eliminate v. 排除，淘汰
considerable adj. 相当大的，相当多的
simultaneous adj. 同时发生的，同时存在的，同时的
专业英语
——Specialized English
第二部分 通信技术
Unit 9： WDM （Wavelength Division Multiplexing）
——波分复用
Wavelength Division Multiplexing (波分复用):
在Op一tic根al光bea纤m中s w同ith时di传ffe输ren多t w波av长ele光ng信ths号p的rop一ag种ate技术
Specialized English on Communicaght span the globe, transmitting massive amounts of information in the twinkling of an eye. The equivalents of millions of telephone calls are transmitted on a single fiber, thinner than a human hair. Astounding as these advances may seem, we are only at the beginning of what is possible . massive ：大量的；astounding ：令人吃惊的 光的高速公路跨越全球，眨眼之间传输巨量的信息。这等于 数百万电话的通信量通过比人的头发还细的光纤进行传输。 这些成就似乎使人很吃惊，但我们只是处于可能会产生更大 成就的开始。
l schem话e,音called wavelength-division multiplle1xing (WWDDMM),
increas数es据the inf0ormation-carrying capacli2ty of a fiber. . . ln 单波长的系统 波分复用系统
Specialized English for Communication Engineering
波分复用的原理
λ1
λ1
λ2
λ2
λ3
λ3
合
分
波
波
器
器
λn
λn
NEW WORDS AND PHRASES
visionary n. 幻想家，梦想家
significant adj. 重大的，效果显著的
span
n. 跨度, 跨距, 范围 v. 横越
equivalent adj. 相等的, 相当的, 同意义的