Abstract: A fiber laser apparatus that generates invisible laser light using an amplification optical fiber having a core and that propagates a fundamental mode and a low-order mode is provided. The fiber laser apparatus includes a visible laser light source that generates visible laser light, an introducing section that introduces the visible laser light generated by the visible laser light source into a core of the amplification optical fiber, a cladding light attenuating section that attenuates light which has propagated through a cladding of the amplification optical fiber, at a subsequent stage of the amplification optical fiber, and a drive unit that drives the visible laser light source to emit the visible laser light through a core of the output optical fiber in a case of performing alignment of an irradiation position of the invisible laser light with respect to a workpiece.

Abstract: A fiber laser apparatus that generates invisible laser light using an amplification optical fiber having a core and that propagates a fundamental mode and a low-order mode is provided. The fiber laser apparatus includes a visible laser light source that generates visible laser light, an introducing section that introduces the visible laser light generated by the visible laser light source into a core of the amplification optical fiber, a cladding light attenuating section that attenuates light which has propagated through a cladding of the amplification optical fiber, at a subsequent stage of the amplification optical fiber, and a drive unit that drives the visible laser light source to emit the visible laser light through a core of the output optical fiber in a case of performing alignment of an irradiation position of the invisible laser light with respect to a workpiece.

Abstract: A fiber laser apparatus that generates invisible laser light using an amplification optical fiber having a single-mode core and outputs the invisible laser light via an output optical fiber is provided. The fiber laser apparatus includes a visible laser light source that generates visible laser light, an introducing section that introduces the visible laser light generated by the visible laser light source into a core of one of the amplification optical fiber and the output optical fiber, and a drive unit that drives, in a case of performing alignment of an irradiation position of the invisible laser light with respect to a workpiece, the visible laser light source and emits the visible laser light via the core of the output optical fiber.

Abstract: An actuator includes a motor, a reverse input prevention device, a conversion device, and a rod. The reverse input prevention device includes an input member and an output member. The reverse input prevention device prevents an external force inputted to the output member from being transmitted to the input member. The output member has a lock portion, an outer peripheral wall portion, pairs of pins, elastic bodies arranged between the pairs of pins and biasing the pairs of pins so as to be apart from one another in a circumferential direction, and the input member including plural hooks arranged on both sides of the pairs of pins in a circumferential direction. After the rod reaches a target position by one-direction rotation of the rotation shaft, the plural hooks return to an initial position by the other-direction rotation of the rotation shaft.

Abstract: A laser device includes an optical fiber laser unit including an amplification optical fiber, a plurality of pumping light sources outputting pumping lights for optically pumping the amplification optical fiber, and a controller controlling the pumping light sources. When an instruction value for supplying a predetermined driving electric current to each of the pumping light sources is input to the controller, the controller conducts a control of supplying a compensated electric current value as a driving electric current obtained by multiplying an initial electric current value corresponding to the instruction value by a compensation coefficient and supplying the compensated electric current value to each of the pumping light sources. The compensation coefficient is set to restrain a decrease in a power with time of a laser light output from the optical fiber laser unit.

Abstract: An optical fiber laser device includes optical reflectors making an invisible laser light from an amplification optical fiber; a light source outputting a visible light; an introduction unit outputting the laser light input to a first input terminal from a first output terminal mainly, outputting the visible light input to a second input terminal from the first output terminal mainly, inputting the visible light output by the light source connected to the second input terminal and introducing the visible light to the amplification optical fiber or a output optical fiber via the first output terminal; an optical multiplexer/demultiplexer outputting the visible light to the introduction unit, and outputting a leaking return light input from a side of the introduction unit; and a controller outputting the visible light from the output optical fiber in a case of determining a position at which the laser light will be irradiated.

Abstract: A laser device includes an optical fiber laser unit including an amplification optical fiber, a plurality of pumping light sources outputting pumping lights for optically pumping the amplification optical fiber, and a controller controlling the pumping light sources. When an instruction value for supplying a predetermined driving electric current to each of the pumping light sources is input to the controller, the controller conducts a control of supplying a compensated electric current value as a driving electric current obtained by multiplying an initial electric current value corresponding to the instruction value by a compensation coefficient and supplying the compensated electric current value to each of the pumping light sources. The compensation coefficient is set to restrain a decrease in a power with time of a laser light output from the optical fiber laser unit.

Abstract: An optical fiber laser device includes optical reflectors making an invisible laser light from an amplification optical fiber; a light source outputting a visible light; an introduction unit outputting the laser light input to a first input terminal from a first output terminal mainly, outputting the visible light input to a second input terminal from the first output terminal mainly, inputting the visible light output by the light source connected to the second input terminal and introducing the visible light to the amplification optical fiber or a output optical fiber via the first output terminal; an optical multiplexer/demultiplexer outputting the visible light to the introduction unit, and outputting a leaking return light input from a side of the introduction unit; and a controller outputting the visible light from the output optical fiber in a case of determining a position at which the laser light will be irradiated.

Abstract: A fiber laser apparatus in which pump light is introduced into an optical fiber to generate laser light includes a detecting section that detects signal light leaking out from a core of the optical fiber as leakage signal light, a determining section that determines that, in a case where there is a decrease in an intensity of the leakage signal light detected in the detecting section, a failure of the fiber has occurred, and a stopping section that stops, in a case where the determining section has determined that a failure of the fiber has occurred, the introduction of the pump light into the optical fiber. The detecting section detects the leakage signal light leaking out of a High Reflectivity FBG that is provided on a side opposite to an output side of the laser light.

Abstract: A fiber laser apparatus that generates invisible laser light using an amplification optical fiber having a single-mode core and outputs the invisible laser light via an output optical fiber is provided. The fiber laser apparatus includes a visible laser light source that generates visible laser light, an introducing section that introduces the visible laser light generated by the visible laser light source into a core of one of the amplification optical fiber and the output optical fiber, and a drive unit that drives, in a case of performing alignment of an irradiation position of the invisible laser light with respect to a workpiece, the visible laser light source and emits the visible laser light via the core of the output optical fiber.

Abstract: A fiber laser apparatus in which pump light is introduced into an optical fiber to generate laser light includes a detecting section that detects signal light leaking out from a core of the optical fiber as leakage signal light, a determining section that determines that, in a case where there is a decrease in an intensity of the leakage signal light detected in the detecting section, a failure of the fiber has occurred, and a stopping section that stops, in a case where the determining section has determined that a failure of the fiber has occurred, the introduction of the pump light into the optical fiber. The detecting section detects the leakage signal light leaking out of a High Reflectivity FBG that is provided on a side opposite to an output side of the laser light.

Abstract: A light input/output terminal module 100 comprises a jacket tube 110 and a flange 120. A glass portion 20 of the optical fiber is inserted in the center portion thereof. To efficiently remove the leaked light in a cladding 22 to the jacket tube 110, the jacket tube 110 is made of silica glass or the same material as that of the cladding 22. The jacket tube 110 is fixed by fusion splicing or adhesion to the cladding so as to integrally unify the jacket tube 110 and the cladding 22. The beam diameter at the fiber end portion is enlarged by an optical component which fusion bonds the tip end of the optical fiber to the coreless fiber so that the optical power density at the light input/output terminal module is reduced.

Abstract: An apparatus (10) for melt-adhering resin pipes, comprising support means (11, 12) for supporting a resin pipe (1) engaged with a resin joint (2), and laser irradiation means (30) for irradiating a laser beam onto a portion of the resin pipe engaged with the resin joint. Further, an axial direction driving means and a circumferential direction driving means may be provided so that the laser irradiation means (30) moves in the circumferential direction and in the axial direction of the resin pipe.

Abstract: In a feeder line drawing structure of a motor for a ship propeller, a guide portion detachably retaining a feeder line drawn out from a grommet in a drawing direction is provided in a lower end side of a housing in accordance with an integral molding, a bracket connected to a lower end of a housing formed as a close-top tube shape.

Abstract: In a feeder line drawing structure of a motor for a ship propeller, a guide portion detachably retaining a feeder line drawn out from a grommet in a drawing direction is provided in a lower end side of a housing in accordance with an integral molding.

Abstract: A light input/output terminal module 100 comprises a jacket tube 110 and a flange 120. A glass portion 20 of the optical fiber is inserted in the center portion thereof. To efficiently remove the leaked light in a cladding 22 to the jacket tube 110, the jacket tube 110 is made of silica glass or the same material as that of the cladding 22. The jacket tube 110 is fixed by fusion splicing or adhesion to the cladding so as to integrally unify the jacket tube 110 and the cladding 22. The beam diameter at the fiber end portion is enlarged by an optical component which fusion bonds the tip end of the optical fiber to the coreless fiber so that the optical power density at the light input/output terminal module is reduced.

Abstract: A first optical waveguide guides a pumping light emitted from a semiconductor laser. A second optical waveguide absorbs the pumping light and emits a spontaneous emission light having a wavelength longer than that of the pumping light. A third optical waveguide guides a light output from the second optical waveguide to outside. A wavelength selecting element is provided between the second optical waveguide and the third optical waveguide, across which a resonator is formed between the semiconductor laser side and an output side to outside. A wavelength of a laser light emitted from the resonator is set by controlling length of the second optical waveguide.

Abstract: A light source unit includes an emission surface and a plurality of point light sources arranged on the emission surface. An optical system focuses a plurality of light beams emitted from the point light sources into a single light beam and irradiates a target object to be irradiated with the single light beam. The single light beam is obtained with a desired light intensity profile according to a combination of positions where the point light sources are arranged and intensity distributions of the light beams emitted from the point light sources.

Abstract: In a motor-driven power steering apparatus, the main coil winding and auxiliary coil winding are wound around the same slot of a stator core in a parallel manner, a motor drive means has a main driver feeding at least to the main coil windings, and an auxiliary driver feeding only to the auxiliary coil windings, the main driver being actuated so as to be capable of assisting the steering during normal conditions of a control system of an electric motor, and the auxiliary driver is actuated so as to execute an auxiliary assist corresponding to a motor friction torque under abnormal conditions of the control system of the electric motor.

Abstract: In a motor-driven power steering apparatus, a plurality of rotational position detecting sensors are provided in an electric motor, and during an abnormality in any one rotational sensor, the electric motor can be driven by using a detected result of any other one rotational position detecting sensor.