Patent ID: 7693192
Filing Date: 2010-04-06
Classification: H01S

Abstract:
1. A mode-locked laser device comprising: a Fabry-Perot resonator; a mode-locking element disposed within the resonator; a solid-state laser medium disposed within the resonator; an exciting means for applying excitation light to the solid-state laser medium; and a dichroic mirror for reflecting the excitation light and transmitting lasing light, wherein: the dichroic mirror is disposed within the resonator, the exciting means applies the excitation light to the resonator from a direction crossing the optical axis of the resonator, the exciting means directs the excitation light to the dichroic mirror and the dichroic mirror reflects the excitation light toward the solid-state laser medium to apply the excitation light to the solid-state laser medium, opposite ends of the resonator, the mode-locking element and the solid-state laser medium are disposed to provide an average beam diameter of the lasing light of not more than 150 μm on the mode-locking element and an average beam diameter of the lasing light of not more than 200 μm within the solid-state laser medium, and the resonator mirror forming one of the ends of the resonator is provided with a coating having a negative group velocity distribution to provide a zero or less group velocity distribution for the entire resonator.