The monomode guided propagation of a short (500-fs) laser pulse is studied for an incident intensity in the range 10<sup>13</sup>–3×10<sup>18</sup> W/cm<sup>2</sup> 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 (10<sup>13</sup>–10<sup>16</sup> W/cm<sup>2</sup>) and corresponds, except for a coupling constant, to the value predicted by an analytical model for monomode guiding. For incident intensities larger than 10<sup>17</sup> W/cm<sup>2</sup>, 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
(000.4930) General : Other topics of general interest
(230.7370) Optical devices : Waveguides
(320.7140) Ultrafast optics : Ultrafast processes in fibers
(350.5400) Other areas of optics : Plasmas
C. Courtois, B. Cros, G. Malka, G. Matthieussent, J. R. Marquès, N. Blanchot, and J. L. Miquel, "Experimental study of short high-intensity laser-pulse monomode propagation in centimeter-long capillary tubes," J. Opt. Soc. Am. B 17, 864-867 (2000)