bandwidth distance product
 

* 1.Of an optical fiber, under specified launching and cabling conditions, at a specified wavelength, a figure of merit equal to the product of the fiber's length and the 3- dB bandwidth of the optical signal. Note 1: The bandwidth&#149distance product is usually stated in megahertz&#149 kilometer (MHz&#149km) or gigahertz&#149kilometer (GHz&#149km). Note 2: The bandwidth&#149distance product, which is normalized to 1 km, is a useful figure of merit for predicting the effective fiber bandwidth for other lengths, and for concatenated fibers. Synonym bandwidth&#149length product

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