Generation of gigahertz-repetition-rate femtosecond vortex beams by an optical parametric oscillator
{{output}}
The generation of GHz-repetition-rate femtosecond vortex beams is reported for the first time, to the best of our knowledge. A self-developed GHz-repetition-rate Kerr-lens mode-locked Yb:CYA laser was used to pump an optical parametric oscillator (OPO). Hermit... ...
