Hamamatsu-Photonics K.k.

Osaka University

Toyota Jidosha Kabushiki Kaisha

Other

Toshiyuki Kawashima

Takashi Sekine

Hirofumi Kan

Yoshinori Kato

Takashi Kurita

Nakahiro Satoh

Yoneyoshi Kitagawa

Yoshitaka Mori

Naoki Nakamura

Osamu Komeda

Norio Kurita

Hirozumi Azuma

Katsuhiro Ishii

Yasuhiko Nishimura

Hiroshi Azechi

Takaaki Morita

Yoshinori Tamaoki

Takeshi Watari

Yasuki Takeuchi

Masakatsu Murakami

Nobuhiko Sarukura

Ryo Yasuhara

Masaru Takagi

Tadashi Kanabe

Ryohei Hanayama

Masayuki Fujita

Tomoyoshi Motohiro

Tatsumi Hioki

Yujin Zheng

Noriaki Miyanaga

Kazuhisa Fujita

Yasukazu Izawa

Shinichiro Okihara

Shigeki Tokita

Kenichi Ueda

Sadao Nakai

Ryo Yoshimura

Koichi Iyama

Yuki Kabeya

Yuma Hatano

Atsushi Sunahara

Yasushi Miyamoto

Tadashi Ikegawa

Osamu Matsumoto

Yoshio Mizuta

Mitsutaka Kakeno

Katsunobu Nishihara

A laser apparatus includes a semiconductor laser element, a waveform calculation unit for calculating input waveform data, a driver circuit for supplying a drive current having a temporal waveform according to the input waveform data to the semiconductor laser element, an optical amplifier for amplifying laser light output from the semiconductor laser element, and a light waveform detection unit for detecting a waveform of laser light after the amplification output from the optical amplifier. The waveform calculation unit compares the waveform of the laser light after the amplification detected by the light waveform detection unit with a target waveform, adjusts a temporal waveform of the input waveform data, and brings the waveform of the laser light after the amplification close to the target waveform.

Laser device, and laser waveform control method

A laser apparatus includes a light source unit and a light combining unit. The light source unit outputs first laser light and second laser light having a wavelength different from that of the first laser light to different optical paths. The light combining unit is optically coupled to the light source unit, and combines the first laser light and the second laser light to generate a burst pulse with a frequency according to a difference between the wavelength of the first laser light and the wavelength of the second laser light. In the light source unit, the wavelengths of the first laser light and the second laser light are set in advance or settable such that the frequency of the burst pulse is 1 GHz or more.

Laser device and method for generating laser light

An external resonator-type semiconductor laser deviceA includes an external resonator formed of one or a plurality of laser diode light sources and a VBG; an optical fiber which outputs output light La from the laser diode light source toward the VBG, and into which return light Lb from the VBG is input; and a displacement unit that displaces a disposition position of the VBG with respect to an input and output end surface of the optical fiber.

External resonator-type semiconductor laser device

A laser processing apparatus includes a light source which outputs a laser light, and a waveform control unit which controls a pulse waveform of the laser light irradiating the workpiece, in which the pulse waveform of the laser light controlled by the waveform control unit includes a main pulse and a foot pulse temporally preceding the main pulse, and a peak intensity of the foot pulse is smaller than a peak intensity of the main pulse, and a peak position of the main pulse is positioned in a retention time period of plasma generated due to an incidence of the foot pulse on the workpiece.

Laser processing apparatus and laser processing method

A laser device is a laser device that includes an output unit that outputs seed light to a light amplifying unit. The output unit has a light source unit that outputs, as the seed light, rays of light with a plurality of wavelengths lying within a gain range of the light amplifying unit, and a seed light control unit that controls an intensity-time waveform of the seed light output from the light source unit.

Laser device and method for controlling waveform

A laser medium unit includes: a plate-shaped laser gain medium which includes a first surface and a second surface opposite to the first surface and generates emission light by the irradiation of excitation light from the first surface; a reflection member that is provided on the second surface so as to reflect the excitation light and the emission light; and a cooling member that cools the laser gain medium. The laser gain medium includes an irradiation area which is irradiated with the excitation light and an outer area which is located outside the irradiation area when viewed from a thickness direction intersecting the first surface and the second surface. The cooling member is thermally connected to the second surface through the reflection member so that a cooling area of the laser gain medium is formed on the second surface.

Laser medium unit and laser device

The laser amplification apparatus is provided with a plurality of plate-shaped laser medium components (Mto M) which are disposed to be aligned along a thickness direction, and prisms (Pto P) which optically couples the laser medium components. Each of the laser medium components is provided with a main surface to which a seed light is incident, and a side surface which surrounds the main surface. An excitation light is incident from at least one side surface of a specific laser medium component among the plurality of laser medium components. The excitation light is incident through the prism to a side surface of the laser medium component adjacent to the prism.

Laser amplification apparatus, laser apparatus, and laser nuclear fusion reactor

A plate-like laser medium has a through-hole for providing a flow of a cooling medium. The laser medium unit includes the plurality of laser media. A laser beam amplification device includes a laser medium unit, an excitation light sourcethat causes excitation light to enter the laser medium unit, a through-holeof a window member as a unit for supplying the cooling medium in a through-holeof the laser medium, and a cooling medium flow path Farranged around the laser medium unit

Laser medium, laser medium unit, and laser beam amplification device

The present invention relates to a method for manufacturing a tracer-encapsulated solid pellet for magnetic-confinement fusion, the method comprising a liquid droplet formation step of discharging an organic liquid containing an organic solvent into a stabilizing liquid to thereby form liquid droplets, and an organic solvent removal step of removing the organic solvent from the liquid dropletsA. The organic liquid to be used is a liquid having a first organic polymer containing tracer atoms and a second organic polymer being an organic polymer different from the first organic polymer dissolved in the organic solvent, wherein the first organic polymer and the second organic polymer can be mutually phase-separated.

Method for manufacturing tracer-encapsulated solid pellet for magnetic-confinement fusion

The device has a target supply unitfor supplying a targetto a chamber, a target monitorfor monitoring the targetpresent inside the chamber, a laser light irradiatorfor irradiating the targetpresent inside the chamber, with laser light, and a controller. The target supply unitemits the targetat a timing for emitting, that is controlled by the controller, into a preset emission directioninside the chamber, and the controllercalculates an irradiation pointwith the laser light, calculates a timing for arriving of the targetat the irradiation point, and makes the laser light irradiatorirradiate the target with the laser light, based on the irradiation pointand the timing for arriving.

Device for quantum beam generation, method for quantum beam generation, and device for laser fusion

Provided is a laser device including N semiconductor laser array stacks, a prismatic optical system that shifts optical axes of luminous fluxes respectively output from the N semiconductor laser array stacks so as to decrease intervals among the luminous fluxes, and an imaging optical system that causes the luminous fluxes to be condensed and deflected for each luminous flux. The imaging optical system causes the luminous fluxes to be deflected so that the luminous fluxes overlap each other at a predetermined position and generates a light-condensing point of the luminous fluxes between the imaging optical system and the predetermined position.

Laser device having semiconductor laser array stacks

A laser medium unitin a laser beam amplification device includes a plurality of laser media. A cooling medium flow path Fis provided around the laser medium unitto cool the laser medium unitfrom outside. A sealed space between the laser mediais filled with gas or liquid, and a laser beam for passing through the sealed space is not interfered by a cooling medium flowing outside. Therefore, a fluctuation of an amplified laser beam is prevented, and a quality such as stability and focusing characteristics of the laser beam is improved.

Laser beam amplification device

A radiation generating apparatus comprises a fuel storage unitfor storing a mixed liquida pressure application unitfor applying a pressure to the mixed liquida jet formation unitfor forming a jetof the mixed liquida reaction unitfor forming the jetof the mixed liquidtherein, a pressure adjustment unitfor setting a pressure in the reaction unitlower than an internal pressure of the jet formation unitand a light source unitfor irradiating a particle groupwith laser light L

Radiation generating apparatus and radiation generating method

A target shell monitoring devicethat monitors an attitude and a position of the target shell Tg, a compression laser output devicethat irradiates the target shell Tgwith a compression laser light LS, and a heating laser output devicethat irradiates the target shell Tgwith a heating laser light LSfollowing the compression laser light LSare provided. The target shell Tghas a hollow spherical shell shape, includes an approximately spherical space Sp on an inner side thereof, includes at least one through hole Hconnecting an outer side thereof and the space Sp, and includes, on an outer surface Sfthereof, irradiation areas Arand Arto be irradiated with compression laser lights.

Laser fusion device and nuclear fusion generating method

An object of the present invention is to efficiently improve uniformity of energy lines to be irradiated. A method of determining nuclear fusion irradiation coordinates according to the present invention is a method of calculating irradiation coordinates when energy lines are irradiated onto a nuclear fusion target, and comprises an initial arrangement step Sof virtually arranging electric charges Qat initial coordinates of the number of irradiation coordinates Non a spherical surface Sset by using random numbers, a coordinate analysis step Sof analyzing coordinates rof the electric charges Qin time series based on coulomb forces acting among the electric charges Qby constraining the coordinates ronto the spherical surface S, potential evaluation steps Sand Sof determining a timing at which potential energies of the electric charges Qwere stabilized based on the coordinates r, and an irradiation coordinate deriving step Sof deriving coordinates rat the timing at which potential energies were stabilized as irradiation coordinates of energy lines in a case where a nuclear fusion target is arranged at the center of the spherical surface S.

Method of determining nuclear fusion irradiation coordinates, device for determining nuclear fusion irradiation coordinates, and nuclear fusion device

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Hamamatsu, Japan

Toshiyuki Kawashima