Fiber

Subtleties of bend-insensitive multimode fiber

While the industry has justifiably regarded the development of bend-insensitive OM3 fibers as an advancement, there has been at least one unexpected consequence. We have observed unusual, high multimode OTDR attenuation rates (hereafter “rates”), in both bend-insensitive fibers and bend-insensitive cables.These high rates can result in rejection of properly installed cables due to excessive attenuation rates, misinterpretation of rate values, and improper interpretation of such rates during troubleshooting activities. These high rates can result in misinterpretation of OTDR data from data centers, as data centers have relatively short fiber lengths, in which these increased rates occur.

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