Abstract
The monomode guided propagation of a short (500-fs) laser pulse is studied for an incident intensity in the range inside a glass-walled capillary tube (length, ≈1 cm; inner radius, 15 µm). The measured transmission is constant over a large range of incident intensities and corresponds, except for a coupling constant, to the value predicted by an analytical model for monomode guiding. For incident intensities larger than a drop in transmission is observed, which is attributed to plasma creation at the entrance plane of the capillary tube.
© 2000 Optical Society of America
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