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I'd like to know what is meant by fiber characterization and why I might need itWhat is fiber characterization?Fiber characterization is defined as conducting a series of tests on an installed link in order to assess its general quality and its specific ability to support a particular application or applications. As data rates increase and systems become more complex there are many factors that can impair system performance.So how is ‘fiber characterization’ different from just testing fibers?Well historically, when long distance singlemode fiber links were commissioned it was common practice just to be concerned with the losses of the installed links usually at just two wavelengths - 1310nm and 1550nm. However, with DWDM systems and CWDM systems operating over wider wavelength ranges then the ability of the infrastructure to support these other wavelengths may also need to be verified. In addition, as data rates increase from 2.5Gb/s to 10Gb/s and up to 40Gb/s then the dispersion characteristics of the fiber become much more critical and additional tests are required including chromatic dispersion and polarization mode dispersion. With PMD the performance of the fiber can vary significantly from fiber to fiber within the same cable and so it is often necessary to measure every fiber and keep detailed records of which fibers can support which data rates.Fiber characterization is the process of carrying out a comprehensive suite of tests that fully assess the capabilities of a fiber infrastructure. |
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