Abstract
The coupling of an ultrashort laser pulse into a single-mode optical communication
fiber gives rise to two propagating pulses as a result of the excitation of
two guided modes, the fundamental, , and the leaky, . Such a phenomenon provides a new approach to the study of the
propagation properties of the mode. An experiment with tunable 110-fs pulses at a wavelength
near 1550 nm is described. Information about the group velocity,
the polarization-rotation length, the attenuation coefficient, and the cutoff
wavelength of the mode is obtained in a simple and direct way for various fibers.
© 2001 Optical Society of America
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