Sub-50-femtosecond high-peak-power pulses from a regeneratively initiated self-sustained continuous-wave mode-locked chromium-doped forsterite laser

摘要

Abstract: atively-initiated, self-sustained, continuous-wave mode- locked operation of a chromium-doped forsterite laser operated at 3.5$DGR@C is described. Without compensating for the positive group velocity dispersion of the cavity, regenerative, acousto- optic modulation produced pulses of between 41 and 6.5 psec (FWHM) at 1.23 $mu@m with average output powers of between 280 and 380 mW, respectively. By employing intracavity negative group velocity dispersion compensation, nearly transform-limited femtosecond pulses of 48 fsec (FWHM) duration were generated with average TEM00 output powers of 380 mW at 1.23 $mu@m. These represent the shortest and highest peak power pulses directly generated from this laser system to date.!25