Patent ID: 7839908

Claim:
A mode control waveguide laser device comprising: a laser medium that is planar, has a waveguide structure in a thickness direction of a cross-section perpendicular to an optical axis, and has a cyclic lens effect in a direction perpendicular to the optical axis and the thickness direction; a clad that is bonded onto one surface of the laser medium; and a heat sink that is bonded onto one surface side of the laser medium through the clad, and wherein a laser oscillation comprises a laser oscillation that oscillates in a waveguide mode of the laser medium, and a laser oscillation that oscillates in a plurality of independent resonator modes that are generated by corresponding intensity and cycle information of the cyclic lens effect of the laser medium, wherein the laser medium generates a cyclic lens effect due to a refractive index distribution within the laser medium, and wherein: a bonding surface of the heat sink with respect to the clad has a comb structure in a cross-section perpendicular to an optical axis; and the refractive index distribution within the laser medium is generated by a cyclic temperature distribution caused by bonding the leading ends of the comb of the comb structure to the clad.