The mode-field diameter (MFD) of single-mode fiber can be obtained by several standardized techniques. An NBS/EIA round robin1 has shown that for dispersion-unshifted fibers around 1.3 µm, the techniques can be made to agree to within 1.7% (one standard deviation). The choice of technique is largely governed by ease of implementation.

© 1986 Optical Society of America

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