US scientists have developed a new solution to resolve fiber transmission barriers
High-speed fiber-optic light can carry large amounts of data, but errors increase as the distance increases. Telephone, video, social media, etc. are causing major congestion on the information superhighway. Since 2000, data carried on a global fine fiber like a hair wire has been increasing by about 60% annually. At this rate, today's fiber-optic network will reach its maximum load in two or three years, turning the Internet into a virtual version of Los Angeles traffic jams. "The Internet transmission dilemma does exist and is a big issue," said Peter Winzer, research leader in optical propagation at Bell Labs, a research and development arm of Alcantar Lucent, a jasmine hill in New Jersey. A new study will postpone the plight of Fiber Channel backwards for several years: In a recent study published in Science, researchers at the University of California, San Diego, reported a technology that transmits digitized information over fiber-optic cables The new model, the model can increase the transmission capacity of optical fiber 2 to 4 times. "This research is a breakthrough in science," said Vijay Vusirikala, a mere network architect at Mountain View Google in California, who said: "Any technology that lets us add fiber capacity is critical." Optical fibers were first adopted in the 1980s as they showed significant potential for increasing Internet transmission capacity. Prior to this, the data was mainly transmitted as an analog signal over a copper cable. Fiber Optic - Transmits data in the form of an optical chirp - Much more than the propagation or bandwidth of a copper cable. This is because light pulses of different wavelengths or colors can propagate independently along the same fiber with relatively less crosstalk or interference. And it also allows engineers to spread 100 or more independent streams of information over a single fiber. These streams of information are generated by a chip-based laser, which converts electrical pulses from electronic devices into light and turns each wavelength on or off, resulting in a fast flicker. Now engineers also simulate the shape, phase, polarization of the pulse and its physical space in the fiber. At the end of the fiber optic highway, the detector converts light pulses into electrons. With the help of modern laser communications and detectors, today's single optical fiber can carry 100-200 optical signals simultaneously with a total carrying capacity of 20 trillion bits per second. These signals can not be attenuated while propagating over considerable distances. However, if the transmission distance reaches tens of thousands of kilometers or more, such as the distance from New York to Los Angeles, the optical distortion will occur silently, resulting in the accumulation of errors reducing the quality of transmitted data. This is due to the interference of multiple signals at different wavelengths. When a signal propagates along an optical fiber, its electromagnetic waves cause the electrons in the glass to be disturbed, which can affect the propagation of other light waves. As a result, the two first light waves merge to form a third light wave at a single wavelength. This effect is weak and weak, but it accumulates as the distance increases - especially in fibers that carry a lot of light. "As the number of channels increases and the distance increases, the problem becomes bigger and bigger," said Stojan Radic, an electronic engineer and photophysicist at the University of California, San Diego, and one of the study's authors. Radic and colleagues initially wanted to solve the problem by making the laser more stable, but their research did not make any headway. Therefore, they adopted a different strategy: to ensure that laser changes are predictable, not random. Modern communications equipment usually uses several lasers to create all the different wavelengths and transmit them to the fiber. In contrast, Radic's team used a device called a frequency comb that converts light from a single laser, a single wavelength, into pulses of different wavelengths over a range of wavelengths. Then, each wavelength is adjusted and propagates an optical signal. The point is that as the primary laser signal changes from its original wavelength, each sub-pulse will change consistently with the same exact number of steps. This allows them to directly detect optical distortion and subtract these distortions. By doing this, Radic said the technology will allow the fiber to carry twice as much data or twice the distance it takes to transmit before the signal needs to be restored. He added that his research team already had a clear way of doubling the amount of information it would travel or the distance it would travel. "This is a very important step," Winzer said in a review of the study. However, he added: "The utility of the technology remains to be seen further." He emphasizes that a precondition for implementing this technology is the need for a new chip that is different from currently used data coding and signal processing. Even though this technology can multiply the information transmission capacity of existing fiber by several times, it will not end up as an alternative to laying more informational highways, Winzer and other researchers said. Those new cables need to include cutting-edge technologies such as "multimode" fibers with much higher bandwidth than the underground fiber currently in use. However, the cost of laying new fiber will be extremely high, so it is also a last resort option. XCMG small 18 - 20m mobile elevating work platform XGS18K Articulated Boom Lift. XGS18 ,XGS18K,XGS18K Lift,XCMG XGS18K，xcmg,Hydraulic drive,18m,boom lift,Telescopic Boom Lift ,18m XGS18K Xuzhou Xuqi Heavy Machinery Co., Ltd. , https://www.xqheavy.com
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