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Optical soliton dynamics can cause the extreme alteration of the temporal andspectral shape of a propagating light pulse. They occur at up to kilowatt peakpowers in glass-core optical fibres and the gigawatt level in gas-filledmicrostructured hollow-core fibres. Here we demonstrate optical solitondynamics in large-core hollow capillary fibres. This enables scaling of solitoneffects by several orders of magnitude to the multi-mJ energy and terawatt peakpower level. We experimentally demonstrate two key soliton effects. First, weobserve self-compression to sub-cycle pulses and infer the creation ofsub-femtosecond field waveforms - a route to high-power optical attosecondpulse generation. Second, we efficiently generate continuously tunablehigh-energy (1 to 16 $\mu$J) pulses in the vacuum and deep ultraviolet (110 nmto 400 nm) through resonant dispersive-wave emission.These results promise tobe the foundation of a new generation of table-top light sources for ultrafaststrong-field physics and advanced spectroscopy.

High-energy pulse self-compression and ultraviolet generation through soliton dynamics in hollow capillary fibres