Shimadzu Corporation

Jiro Saikawa

Junki Sakamoto

Koji Tojo

Naoya Ishigaki

Shingo Uno

Tomoyuki Hiroki

Kazuma Watanabe

Ichiro Fukushi

Akiyuki Kadoya

Aklyuki Kadoya

A laser device has a plurality of laser diodes; a plurality of optical elements installed corresponding to the plurality of the laser diodes; a plurality of units formed by fixing the laser diodes and the optical elements per each laser diode and installed corresponding to the plurality of the laser diodes; a converging element that converges laser beams emitted from the plurality of the laser diodes to a fiber; a housing element houses the plurality of the units and the converging element; and a thermal transfer plate performs heat dissipation of the plurality of the units. The heat resistance reducing element having a heat resistance value that is smaller than a predetermined value is installed between the thermal transfer plate and each unit or the processing for reducing the heat resistance is performed.

Laser device

The present invention comprises: a light-emitting element group configured from columns of serially connected light-emitting elements, one of the ends from each of the columns of the light-emitting elements being collectively connected to a power source; current control elements, provided to correspond to the columns, and being connected to each of the columns of the light-emitting elements at the other end thereof, for controlling the current flowing through the light-emitting elements; a forward voltage monitoring circuit for monitoring, for each of the columns, the total forward voltage across the light-emitting elements; and a control circuit for controlling the current control elements, on the basis of the total forward voltage across the light-emitting elements from each of the columns detected by the forward voltage monitoring circuit, in such a manner that the variations in the total forward voltage across the columns of the light-emitting elements reach a threshold value or lower.

Semiconductor light-emitting device

A laser machining device machines a machining target subject by irradiating the converged laser beam output from each laser diode of a plurality of laser diodes connected in series to each other. A machining laser beam output-power driving circuit Qoutputs a machining laser beam by driving the plurality of laser diodes-d,. A guide light output-power driving circuit Qoutputs a guide light by driving a partial laser diodeof the plurality of laser diodes. A selection means SW, SWselects the guide light output-power driving circuit on determining the position and selects the machining laser output-power driving circuit on a laser machining. A setup value comparison circuitcontrols the electric current flowing through the part of laser diodes to be below the electric current setup value to output the guide light having electric current not higher than the predetermined value.

Laser machining device

A multiplexing laser light source which can easily couple a plurality of laser lights to a fiber having a core of such a size as to be difficult to align the laser lights therewith. The multiplexing laser light source includes: a plurality of semiconductor lasers, each of which outputs a laser light; a fiber having a core and a cladding, the fiber including a mode stripper mechanism configured to remove a cladding mode light on an incident side on which the laser light is incident; a coupling lens couples the laser lights emitted from the plurality of semiconductor lasers to the fiber by condensing the laser lights; an output monitor to monitor an output of the fiber; a ferrule attached to the incident side of the fiber and configured to absorb the cladding mode light; and a temperature monitor configured to monitor a temperature of the ferrule.

Multiplexing laser light source and fiber adjustment method

A combined-wave (multiplexing) laser source of the present invention has an optical fiber; a plurality of laser sources-that are in-place in a preset interval with regard to each other and which respectively emit laser light, a birefringent elementthat separates spatially an incident laser light to an ordinary ray and an extraordinary ray and outputs separated rays every respective laser lights, and a convergence lensthat collects the ordinary ray and the extraordinary ray separated by said birefringent element relative to the respective laser lights and converges the rays to the optical fiber.

Combined-wave (multiplexing) laser beam source

The light-synthesizing laser device includes a plurality of collimating lenses that are arranged in a one-to-one relationship with a plurality of laser light sources which exhibit anisotropy in a laser light emission angle, and that convert laser light beams emitted from the laser light sources into parallel light; a condensing lens that condenses the laser light that has been converted into parallel light by the plurality of collimating lenses; and an optical fiber () having a square waveguide core (SC) which has a square shape, the fiber receiving and synthesizing the laser light condensed by the condensing lens. A longitudinal axis of a condensed beam condensed by the condensing lens is aligned with a diagonal axis of the square waveguide core.

Light-synthesizing laser device

A laser device has a plurality of semiconductor lasers, a driving device that supplies a driving electric current to the semiconductor laser, a trigger generation circuit that sends a trigger signal to the driving device in order to output the driving electric current, and a wave-combining device that wave-combines laser light emitted from the semiconductor lasers at the combined-wave end, and at least any one of a signal transmitting time, an electric current transmitting time and a light transmitting time is adjusted so as to be the time set respectively for transmitting paths; wherein the signal transmitting time in which the trigger signal transmits over the signal path, the electric current transmitting time in which the laser light transmits over the electric current path, a light transmitting time in which the laser light transmits over the optical path.

During temperature tuning, first, the temperature of a third harmonic generating element is swept to determine the optimal temperature Ttp of the third harmonic generating element in a state where the temperature of a second harmonic generating element has been set to a temperature shifted away from the vicinity of the optimal temperature. Next, the temperature of second harmonic generating element is swept to determine the optimal temperature Tsp of the second harmonic generating element in a state where the temperature of the third harmonic generating element has been set to a temperature shifted away from the vicinity of the optimal temperature.

Growing community of inventors

Kyoto, Japan

Jiro Saikawa