微控制器與光纖光學(xué)

　　銅為基礎(chǔ)的連接已經(jīng)服務(wù)了我們很長(zhǎng)一段時(shí)間，并會(huì)繼續(xù)這樣做，在應(yīng)用程序中，它是有效的性能和成本的角度來(lái)看。然而，對(duì)于非常高的速度和/或長(zhǎng)途信令，使用金屬導(dǎo)體的材料成本和物理信號(hào)的限制，帶動(dòng)眼睛到其他運(yùn)輸機(jī)制。

　　光纖并不是什么新鮮事，電信業(yè)推動(dòng)了光纖收發(fā)器和鏈路的發(fā)展和部署，使它們能夠跨越全球。我們的設(shè)計(jì)很少有需要在如此高的速度遍歷長(zhǎng)距離。我們中有更少的人有足夠的口袋來(lái)建立龐大的高速網(wǎng)絡(luò)。另一方面，工程師現(xiàn)在發(fā)現(xiàn)，當(dāng)?shù)氐囊笳谕苿?dòng)金屬互連的限制。

　　這是因?yàn)?a href='http://www.brongaenegriffin.com/v/tag/1301/' target='_blank' class='arckwlink_none'>通信的需要不僅僅是計(jì)算機(jī)中心之間的遠(yuǎn)距離布線。通信必需品也延伸到機(jī)架到機(jī)架，甚至板到板內(nèi)的一個(gè)盒子，所有這一切都推動(dòng)光纖技術(shù)進(jìn)入更高速的設(shè)計(jì)。

　　Legacy COM links on MCUs were adequate for sub Mbit/sec data rates. Then Ethernet took us from 10 to 100 Mbit/s and now 1 Gbit/s links are commonplace. This is where copper runs out of steam and fiber starts to shine.

　　This article looks at issues and concerns engineers face when interfacing microcontrollers and fiber optics. This includes the rudimentary tasks of setting up and controlling laser emitter power levels and sensitivity thresholds for receivers， as well as tracking performance in real time. All parts， datasheets， tutorials， and development kits referenced in this article can be found on the Digi-Key website.