Abstract
We demonstrate methods to increase the energy incident on hollow fibers for spectral broadening by self-phase modulation. We used chirped pulses for spectral broadening, lowering the optical intensity to avoid ionization of the gaseous medium. We also used helium as a nonlinear medium and demonstrated the generation of , pulses at a repetition rate of using a pressure gradient hollow-fiber pulse compressor.
© 2010 Optical Society of America
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