SSS 2011-05-23

（单词翻译）

This is Scientific American's 60-Second Science. I'm Christopher Intagliata. Got a minute?

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 fiber¹-optic cables has its limits. Because when you encode digital bits—ones and zeros—into an analog², optical signal, you're still limited by the bit-rate of your electronics. The standing³ record is about 100 gigabits per second.

To get around that bottleneck⁴, researchers skipped the electronic signal processing—and found a way to do it purely⁵ 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.

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.

Thanks for the minute. For Scientific American's 60-Second Science, I'm Christopher Intagliata.