Patent ID: 7953127
Filing Date: 2011-05-31
Classification: G02B,H01S

Abstract:
1. A mode-locked solid-state laser apparatus comprising: a resonator having an output mirror at one end of the resonator; a solid-state laser medium arranged in said resonator; and a saturable absorbing mirror arranged in said resonator; wherein said solid-state laser medium is arranged at a distance equal to or smaller than twice the Rayleigh range from said saturable absorbing mirror; said saturable absorbing mirror has a depth of absorbing modulation equal to or greater than 0.4%; said mode-locked solid-state laser apparatus is configured to impart a total intracavity linear dispersion D to light having a predetermined wavelength during a round trip of the light in said resonator, where the total intracavity linear dispersion D is smaller than zero and the absolute value |D|, having a relationship expressed by an equation, with a light velocity c, a center wave length λ 0 of the light, a beam cross section A eff,L (=πω L 2 ) of the light in the solid-state laser medium, a nonlinear refractive index n 2 , a crystal length l s of the solid-state laser medium, and pulse energy E P in the resonator, is within a range of minimum value 0 to maximum value which is calculated from pulse bandwidth Δλ P , in which ΔG(CW)=ΔR/2 and ΔG(DP)=ΔR/S are satisfied (where, ΔG(CW) is the gain advantage of the CW background with respect to the fundamental solution pulse, ΔG(DP) is the gain advantage of the double pulse with respect to the fundamental soliton pulse in the resonator, and S is the saturation level of the saturable absorption minor); and said output minor is a negative-dispersion mirror which has a dielectric multilayer structure being formed on a substrate and including two multilayer minors and a cavity layer, which is sandwiched between the two multilayer minors and causes resonance of the light between the two multilayer minors, and the negative-dispersion minor causes a minor dispersion of −3000 fsec