![]() Like the vacuum tubes that preceded the transistor, electronic systems have theoretical These developments have not been unexpected. This enables switching systems and digital access and cross-connect systems (DACS) to transfer signalsįrom channel to channel without having to convert them from light pulsesĮlectronic switching systems-and computers-might see theirĭominance start to fade within this decade. In free space (even if the distance is measured in micrometers) can pass More than just glass pipelines for huge flows of data. It is not clear that sometime soon, photonic systems will be a lot Another benefit is that lightwave signalsĪre not easily intercepted by unauthorized people. Transmit thousands of channels on a finger-thick cable has a lot ofĪppeal, especially in communications systems that share ducts alreadyįiber's immunity to stray electrical fields is another greatĪdvantage, since it eliminates electrical "noise" as aĭisrupter of signal clarity. ![]() "fiber can do anything copper can do, better." The ability to That is still less than 1% of the theoretical potential capacity ofĪstonishing as such exhibitions can be, they reflect theĪpplications of the past. ![]() Supply each of 10,000 customers with 10 ISDN signals, or the equivalent ThatĢ0 Gb/s multiplexed signal is capable of carrying enough information to Second, resulting in a multiplexed signal of 20 gigabits per secondĬarried without errors over 42 miles of single-mode optical fiber. Up 10 lasers, each producing a signal of 2 billion bits (2 gigabits) per Several years ago, researchers at AT&T Bell Laboratories rigged In fact, we're still probing the possibilities. Technology (even in today's most advanced applications) is stillįairly primitive compared to what we can expect from it in the future. ![]() The communications industry turned on the lights-lightwave, that And then there was light." Retrieved from MLA style: "And then there was light." The Free Library.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |