Abstract

Subpicosecond laser pulses at power levels in excess of 1 TW were channeled through hollow microcapillary tubes by use of a combination of grazing-incidence dielectric and plasma-wall reflection mechanisms. Maximum input and output intensities were 1017 and 1016 W/cm2 through 50-μm radius by 3-cm-long glass microcapillary tubes with as few as two waveguide modes being excited. 133-μm radius tubes as long as 13 cm resulted in successful channeling with an extinction coefficient of 0.2 cm−1 and a plasma-wall reflectivity of 80%.

© 1995 Optical Society of America

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