Measurement of Far-Field and Near-Field Radiation Patterns From Optical Fibers (Classic Reprint) - Softcover

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Excerpt from Measurement of Far-Field and Near-Field Radiation Patterns From Optical Fibers

The radiation propagating in an optical fiber can take on various spatial and ahquiar distributions depending upon the relative excttation of fiber modes. Usetui information about the fiber can be Obtained by analyzing the radiation exiting an end. This analysis can take place in either the far or nedr-field region of the end. A tar-field measurement determines the angular dependence of intensity (irradiance) sufficiently far from the end of the fiber (fig. 2 whereas, a near-fieio measurement determines the spatiai intensity distribution in the plane of the end fate.

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