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Single Laser Optical Approach Transmits 700 DVDs of Data per Second
光纜極速！每秒傳輸700張DVD

Whether it's for streaming Netflix or sharing files, we're gobbling up more and more data—and we want it faster. But even shooting data with lasers over fiber-optic cables has its limits. Because when you encode digital bits—ones and zeros—into an analog, optical signal, you're still limited by the bit-rate of your electronics. The standing record is about 100 gigabits per second.
無論是觀看奈飛視頻還是分享資料，數(shù)據(jù)量都是相當(dāng)龐大的，人們對(duì)數(shù)據(jù)傳輸速度的要求也越來越高。 但是即便是利用激光通過光纜傳輸數(shù)據(jù)也有速度上的限制，因?yàn)榘褦?shù)字位－0和1（俺的記憶中應(yīng)該就是二進(jìn)制。。吧。。。）－編碼成模擬光纖信號(hào)的時(shí)候也受到 電子電路比特率的限制。目前最高速度是100千兆每秒。

To get around that bottleneck, researchers skipped the electronic signal processing—and found a way to do it purely optically instead. Using that method, they were able to send data over a 50-kilometer length of optical fiber at 26 terabits per second. That's like sending 700 DVDs a second—the fastest ever recorded for a single laser. The research appears in the journal Nature Photonics. [David Hillerkuss, "26 Tbit s?1 Line-Rate Super-Channel Transmission Utilizing All-Optical Fast Fourier Transform Processing"]
為 了突破這個(gè)瓶頸，研究人員跳過編碼電子信號(hào)，轉(zhuǎn)而發(fā)現(xiàn)一種編碼純光纖信號(hào)的方法。通過這種方法，研究人員可以以26兆兆比特每秒的速度在50千米常的光線 中傳輸數(shù)據(jù)，就好比在一秒內(nèi)發(fā)送700張DVD的速度——這是一束激光能達(dá)到的最高速率了。這項(xiàng)研究發(fā)現(xiàn)刊登在《自然光學(xué)》雜志上。

It is possible to transfer equivalent amounts of data with conventional technology, by bundling together hundreds of lasers—but doing it with a single laser is far more energy efficient. Of course, there's no telling when these transfer rates will make it to your living room. And whether they'll be fast enough for our future need-for-speed.
利用傳統(tǒng)技術(shù)傳輸相同數(shù)量的數(shù)據(jù)也是可能的，把成百束激光捆起來就行——不過只用一束激光要來得節(jié)能得多。當(dāng)然，什么時(shí)候家里也能有這樣得傳輸速度那就很難說了。數(shù)據(jù)傳輸速度是否能滿足人們?nèi)找嬖鲩L(zhǎng)的需求也不得而知。

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