Abstract: An optical scanning device includes an optical mode converter to change, in accordance with a change in wavelength of a light output from a light source or phase of the light output from the light source, a radiation direction of the light, and an actuator to rotate the optical mode converter about each of two shafts orthogonal to each other.

Abstract: There are provided: a planar waveguide in which claddings (2) and (3) each having a smaller refractive index than a laser medium for absorbing pump light (5) are bonded to an upper surface (1a) and a lower surface (1b) of a core (1) which is formed from the laser medium; pump light generation sources (4a) and (4b) for emitting pump light (5) to side surfaces (1c) and (1d) of the core (1); and laser light high reflection films (6a) and (6b) formed on side surfaces (1e) and (1f) of the core (1). Each of side surfaces (2e) and (2f) of the cladding (2) corresponding to the side surfaces (1e) and (1f) of the core (1) has a ridge structure (20) in which a part thereof is recessed.

Abstract: There are provided: a planar waveguide in which claddings (2) and (3) each having a smaller refractive index than a laser medium for absorbing pump light (5) are bonded to an upper surface (1a) and a lower surface (1b) of a core (1) which is formed from the laser medium; pump light generation sources (4a) and (4b) for emitting pump light (5) to side surfaces (1c) and (1d) of the core (1); and laser light high reflection films (6a) and (6b) formed on side surfaces (1e) and (1f) of the core (1). Each of side surfaces (2e) and (2f) of the cladding (2) corresponding to the side surfaces (1e) and (1f) of the core (1) has a ridge structure (20) in which a part thereof is recessed.

Abstract: The multi wavelength laser device includes a laser light source 10 that emits a plurality of laser lights 20 whose fundamental wavelengths differ from one another, a dispersing element 30 that changes the traveling direction of each of the plurality of laser lights according to the wavelength and the incidence direction, and that emits the laser lights in a state in which the laser lights are superposed on the same axis, and a wavelength conversion element 40 that has a plurality of polarization layers disposed therein and having different periods, and that performs wavelength conversion on the fundamental wave laser lights emitted from the dispersing element 30 and placed in the state in which the laser lights are superposed on the same axis, and emits a plurality of laser lights 50 acquired through the wavelength conversion in a state in which the laser lights are superposed on the same axis.

Abstract: A laser output measuring apparatus in which an optical separator is disposed in a position that is rotated by a predetermined angle about an optical axis of a laser beam converged by a lens, and further rotated by a predetermined angle about the optical axis of the laser beam and a straight line perpendicular to an incident surface of the laser beam.

Abstract: The multi wavelength laser device includes a laser light source 10 that emits a plurality of laser lights 20 whose fundamental wavelengths differ from one another, a dispersing element 30 that changes the traveling direction of each of the plurality of laser lights according to the wavelength and the incidence direction, and that emits the laser lights in a state in which the laser lights are superposed on the same axis, and a wavelength conversion element 40 that has a plurality of polarization layers disposed therein and having different periods, and that performs wavelength conversion on the fundamental wave laser lights emitted from the dispersing element 30 and placed in the state in which the laser lights are superposed on the same axis, and emits a plurality of laser lights 50 acquired through the wavelength conversion in a state in which the laser lights are superposed on the same axis.

Abstract: A laser medium 21 is shaped like a plate and has a waveguide structure in a direction of the thickness of a surface thereof perpendicular to the optical axis thereof. A nonlinear material 31 is placed on the optical axis of the laser medium 21 close to the laser medium 21 and has a waveguide structure in the same direction as that of the waveguide structure of the laser medium 21. A ¼ wavelength plate 41 is placed close to one of surfaces, which are perpendicular to the optical axis, of the nonlinear material 31, the one being opposite to a surface close to the laser medium 21.

Abstract: A laser medium 21 is shaped like a plate and has a waveguide structure in a direction of the thickness of a surface thereof perpendicular to the optical axis thereof. A nonlinear material 31 is placed on the optical axis of the laser medium 21 close to the laser medium 21 and has a waveguide structure in the same direction as that of the waveguide structure of the laser medium 21. A ¼ wavelength plate 41 is placed close to one of surfaces, which are perpendicular to the optical axis, of the nonlinear material 31, the one being opposite to a surface close to the laser medium 21.

Abstract: Because a laser device is constructed in such a way that the laser device includes a solid-state laser element 3 that has gains for plural different wavelengths in plural different axial directions, and an optical element that has a characteristic of making an optical loss increase with increase in light intensity for each of light beams with the wavelengths, and the solid-state laser element 3 and the optical element are constructed in such a way as to be included in a resonator for fundamental waves which are generated by the solid-state laser element 3, and the laser device oscillates at two or more wavelengths, outputted light beams with the plural different wavelengths can be acquired by using the single solid-state laser element 3. As a result, a small, cheap, and easy to produce laser device can be acquired.

Abstract: A laser output measuring apparatus in which an optical separator is disposed in a position that is rotated by a predetermined angle about an optical axis of a laser beam converged by a lens, and further rotated by a predetermined angle about the optical axis of the laser beam and a straight line perpendicular to an incident surface of the laser beam.

Abstract: A laser output measurement mechanism includes a light splitter that is disposed in a state rotated by a predetermined angle about an optical axis of laser light incident thereon, and that reflects a part of the laser light according to a Fresnel reflectivity that depends on a polarization direction and an incident angle of the laser light at a reflection surface thereof, and a light detector that measures an intensity of the laser light reflected by the light splitter.