Abstract

The dominant reason for specifying the LP11 mode effective cutoff wavelength of single-mode fibers is to minimize modal noise. However, the fiber configuration, i.e., length and layout, in the standard fiber cutoff wavelength measurement is vastly different from the scenarios where modal noise might be generated in a system. In addition, the effective cutoff wavelength characteristics of cabled fiber are different from those of uncabled fiber, since near cutoff the LP11 mode attenuation is strongly influenced by cable geometry.1,2 Therefore, a technique for measuring the effective cutoff wavelength of cabled fiber in a system configuration, such as described in the EIA FOTP-170 test procedure, yields a value more relevant for use in controlling system performance.

© 1988 Optical Society of America

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