A femtosecond fiber laser with 100-kHz repetition rate was optimized for 3-D nanostructuring of photoresist. Contrasts in three-photon (1045 nm) and two-photon (522 nm) resolution are presented ...

Self-focusing effect and multifocus structures of an ultrashort (~160-fs) pulsed laser beam of ~1.3-mum wavelength are investigated in several organic liquids. The intensity-dependent self-focusing ...