Abstract
Recently, anomalous structures or bumps have been observed in single-mode fiber cutoff wavelength measurements.1-4 The cause of this phenomenon has been hypothesized1,2,4 to be wavelength dependent coupling between the LP11 mode and whispering gallery modes (WGMs) in the curved fiber. We present experimental results for dispersion unshifted and matched- and depressed-cladding fibers that are inconsistent with this hypothesis.
© 1990 Optical Society of America
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