Excerpt from Measurement of Far-Field and Near-Field Radiation Patterns From Optical FibersThe 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.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.