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Dense Wavelength Division Multiplexing (DWDM) is a key component of the world's communications infrastructure. The tremendous growth in telecommunications services is possible today in part through optical networks, where DWDM systems allow much greater bandwidth over existing optical systems. Telecommunication companies have sought out such technologies to help respond to a growing array of customer demands, including streaming video, which require large amounts of bandwidth to create transmissions in real time. Some leading service providers have reported the doubling of bandwidths about every six to nine months. DWDM allows such transmissions by virtually splitting the fibers' capabilities into more than two carriers. From both technical and economic perspectives, the ability to provide potentially unlimited transmission capacity is the most obvious advantage of DWDM technology.
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