Patent ID: 8891564

Claim:
A femtosecond laser apparatus comprising: a first laser material comprising Ng, Np and Nm axes spatially perpendicular to each other; a second laser material comprising Np axis substantially parallel to Ng axis of the first laser material, Nm axis substantially parallel to Np axis of the first laser material and Ng axis substantially parallel to Nm axis of the first laser material; and a first laser diode and second laser diodes arranged to irradiate pump beams to the first laser material and the second laser material, respectively, wherein the first laser material is arranged to make a traveling direction of laser beams generated from the first and second laser materials be substantially parallel to Ng axis of the first laser material and to make a polarizing direction of laser beams generated from the first and second laser materials be substantially parallel to Np axis of the first laser material, and the second laser material is arranged to make a traveling direction of laser beams generated from the first and second laser materials be substantially parallel to Np axis of the second material and to make a polarizing direction of laser beams generated from the first and second laser materials be substantially parallel to Nm axis of the second laser material.