Patent ID: 8204089

Claim:
A mode locked laser device comprising: a cavity, the cavity having a semiconductor saturable absorbing mirror and a negative dispersion mirror that controls group velocity dispersion within the cavity, disposed in a straight line; a solid-state laser medium, disposed in the cavity and outputting oscillating light due to excitation light being incident thereon; an excitation unit that causes the excitation light to be incident on the solid-state laser medium; and a cavity holder, a cavity holder that includes a retaining portion located at a first end of the cavity holder and which is interposed between and retains the semiconductor saturable absorbing mirror and the solid-state laser medium such that the light incident face of the semiconductor saturable absorbing mirror is attached to an external face of said retaining portion of the cavity holder, the solid-state laser medium attached to an internal face of said retaining portion of the cavity holder, the negative dispersion mirror attached to a second end of the cavity holder, and the cavity holder integrally supporting the semiconductor saturable absorbing mirror and the negative dispersion mirror.