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Double the Distance of Fiber Optic Signals

Category: Science & Technology
Posted: 07:02AM
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Of all the data used by humanity, some 99% of it travels along optical fibers, and with demand for the Internet rising, the capacity of optical fibers becomes more and more important. One way to carry more information on optical fibers is to send multiple signals at different frequencies. The issue is that these separate optical channels will still interfere with each other, causing errors, but researchers at University College London have found a way to address it.

What the researchers achieved was a way to receive all of the optical channels together, effectively eliminating the interactions between them. The researchers have already tested it using a 16QAM super-channel and high-speed super-receiver, successfully receiving all of the channels without error. The researchers are next want to test with 64QAM, 256QAM, and 1024QAM, which are super-channels used for digital cable TV, cable modems, and Ethernet connections respectively. To add a bit more context to this advancement, currently optical signals can travel about 3190 Km without error. This method would increase the error-free distance to 5890 Km just be changing the receiver; without having to replace the optical cables, which can be an expensive endeavor.

Source: University College London



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