Hamamatsu-photonics K.k.

Osaka University

Hamamatsu Photonics Kabushiki Kaisha

Other

Toyota Jidosha Kabushiki Kaisha

Kirin Beer Kabushiki Kaisha

Tokai University Educational System

National Institutes of Natural Sciences

Institute for Laser Technology

Hirofumi Kan

Hirofumi Miyajima

Minoru Niigaki

Toru Hirohata

Toshiyuki Kawashima

Yujin Zheng

Yoshihiko Mizushima

Takashi Iida

Yoshihisa Warashina

Kazutoshi Nakajima

Shoichi Uchiyama

Kenichi Sugimoto

Takunori Taira

Akiyoshi Watanabe

Masami Yamada

Hiroshi Sakai

Shucheng Chu

Nakahiro Satoh

Nobuhiko Sarukura

Hiroshi Azechi

Tadataka Edamura

Naota Akikusa

Naoki Nakamura

Takashi Sekine

Nobuo Watanabe

Yasukazu Izawa

Hirozumi Azuma

Xin Gao

Masanobu Yamanaka

Sadao Nakai

Masakatsu Murakami

Yoneyoshi Kitagawa

Yoshitaka Mori

Ryo Yasuhara

Akihiro Sone

Hiromitsu Kiriyama

Masaru Takagi

Masayuki Fujita

Musubu Koishi

Akira Yoshikawa

Nobutaka Suzuki

Tomoyoshi Motohiro

Osamu Komeda

Tatsumi Hioki

Hiroshi Tsuchiya

Takashi Kurita

Masaki Nakaya

Takahide Ochiai

Yasufumi Takagi

Kuniyoshi Mori

Kazuhisa Fujita

Tomoko Suzuki

Tomoko Mochizuki

Shinichiro Okihara

Yasuhiko Nishimura

Kenichi Ueda

Shigeki Tokita

Katsuhiro Ishii

Takeshi Kanzaki

Takeshi Watari

Shigeru Fujino

Chiyoe Yamanaka

Toshihisa Suyama

Atsushi Sunahara

Kunio Awazu

Tadashi Kanabe

Masayuki Saitoh

Masashi Ohta

Ryo Yoshimura

Mitsuo Nakai

Ryohei Hanayama

Hideki Yoshida

Satoru Ooishi

Katsunobu Nishihara

Takayuki Uchiyama

Masaaki Matsuura

Toshimasa Matsuno

Tadashi Ikegawa

Syunichi Gonda

You Wang

Takayoshi Honma

Akira Shirakawa

Nicolaie Pavel

Voicu Lupei

Toshio Naitoh

Yasushi Miyamoto

Hirokazu Ohta

Takuji Yoshida

Masayuki Suzuki

Izuru Daito

Hajime Okada

Nobuto Kageyama

Hironori Sugiyama

Katsunori Ishii

Shinichi Matsuoka

Yasunobu Arikawa

Takahiro Murata

Yoshiyuki Usuki

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

A dental therapy apparatus which enables a dental therapy more surely and less invasively is provided. A dental therapy apparatus (A) comprises a laser light source () emitting laser light (L) having a wavelength within a wavelength region of 5.7 to 6.6 &#x3bc;m; a controller () pulse-driving the laser light source and controlling at least one of pulse width and repetition frequency of pulsed laser light emitted from the laser light source; and an irradiation optical system for irradiating a tooth () including a carious part () with the light emitted from the laser light source. In this dental therapy apparatus, the controller controls at least one of the pulse width and repetition frequency of the pulsed light, so as to selectively cut the carious part ().

Dental therapy apparatus

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 semiconductor laser device includes: a semiconductor laser array in which a plurality of active layers that emit laser lights with a divergence angle &#x3b8;(&#x3e;4&#xb0;) in a slow axis direction are arranged; a first optical element that reflects first partial lights by a first reflecting surface and returns the first partial lights to the active layers; and a second optical element that reflects partial mode lights of second partial lights by a second reflecting surface and returns the partial mode lights to the active layers, the first reflecting surface forms an angle equal to or greater than 2&#xb0; and less than (&#x3b8;/2) with a plane perpendicular to an optical axis direction of the active layers, and the second reflecting surface forms an angle greater than (&#x2212;&#x3b8;/2) and equal to or less than &#x2212;2&#xb0; with the plane perpendicular to the optical axis direction of the active layers.

Semiconductor laser device

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

An object is to be capable of inducing a nuclear fusion reaction at a relatively high efficiency and downsize a device. A nuclear fusion deviceof the present invention includes a nuclear fusion targetincluding a target substratecontaining deuterium or tritium and a thin-film layercontaining deuterium or tritium stacked on the target substrate, a vacuum containerfor storing the nuclear fusion target, and a laser unitfor irradiating two successive first and second pulsed laser lights P, Ptoward the thin-film layerof the nuclear fusion target, and the intensity of the first pulsed laser light Pis set to a value that is smaller than that of the second pulsed laser light Pand allows peeling of the thin-film layerfrom the target substrate

Neutron generation target, device, and method

A semiconductor laser baris mounted onto a liquid-cooled heat sink. A molybdenum reinforcement memberis fixed onto the surface opposite to the surface on which the semiconductor laser moduleis mounted. The molybdenum has a linear expansion coefficient less than that of the heat sink. Sub-mounts are preferably made of a Cu&#x2014;W alloy, more preferably of the reinforcement membermolybdenum. In this case, the stresses that are imposed on the heat sinkwhen being expanded or contracted can cancel each other out.

A plasma shutter forming apparatus for forming a plasma shutter used in a system configured to generate and accelerate radiations by irradiating a target with a laser pulse and generating a high-density plasma for blocking the laser pulse which is returned as a feedback light to upstream of the system without being absorbed by the high-density plasma, including a plasma shutter generating target, and a plasma shutter triggering laser irradiator, wherein the laser pulse from the plasma shutter triggering laser irradiator is directed to the plasma shutter generating target to generate the high-density plasma and form the plasma shutter, thereby blocking the laser pulse which is returned as the feedback light. Optics are prevented from becoming damaged by feedback light reflecting when generating the high-density plasma in a laser-driven radiation generating system and returning back to the upstream of the laser system.

Plasma shutter forming apparatus and forming method

A laser module LM is provided with a quantum cascade laser, a tubular member, and an infrared detector. The tubular memberhas a pair of opening endsand is arranged so that one opening endis opposed to a faceopposed to an emitting end faceof the quantum cascade laser. The infrared detectoris arranged so as to be opposed to the other opening endof the tubular member. Light emitted from the face (rear end face)opposed to the emitting end face (front end face)of the quantum cascade laseris guided inside the tubular memberto enter the infrared detector, and then is detected.

Laser module

This invention relates to semiconductor laser apparatus with a structure for reducing the divergence angle of output light and for narrowing the spectral width. The semiconductor laser apparatus has at least a semiconductor laser array, a collimator lens, a path rotator, and an optical element with a reflecting function. The collimator lens collimates a plurality of laser beams from the semiconductor laser array, in a predetermined direction. The path rotator outputs each beam collimated in the predetermined direction, with a predetermined divergence angle in the predetermined direction in a state in which a transverse section of the beam is rotated by about 90&#xb0;. The optical element is arranged at a position where at least a part of each beam from the path rotator arrives, and constitutes at least a part of an external resonator. This optical element reflects a part of each beam from the path rotator to return the reflected part of each beam to the active layer in the semiconductor laser array.

Semiconductor laser apparatus having collimator lens and path rotator

A neutron measurement apparatusA includes a neutron detection unit, a photodetection unitthat detects scintillation light emitted from the neutron detection unit, a light guide optical systemthat guides the scintillation light from the neutron detection unitto the photodetection unit, and a shielding memberwhich is located between the neutron detection unitand the photodetection unitfor shielding radiation passing in a direction toward the photodetection unit. Further, a scintillator formed of a lithium glass material in which PrFis doped to a glass material 20Al(PO)-80LiF is used as a neutron detection scintillator composing the neutron detection unit. Thereby, the neutron detection scintillator and the neutron measurement apparatus which are capable of suitably performing neutron measurement such as measurement of scattered neutrons from an implosion plasma can be realized.

Scintillator for neutron detection and neutron measurement device

A silicon light-emitting element includes a first conductivity type silicon substratehaving a first surfaceand a second surfaceon a side opposite to the first surface, an insulating filmprovided on the first surfaceof the silicon substrate, a silicon layerprovided on the insulating film, and having a second conductivity type different from the first conductivity type, a first electrodeprovided on the silicon layer, and a second electrodeprovided on the second surface of the silicon substrate, and the silicon substratehas a carrier concentration of 5&#xd7;10cmto 5&#xd7;10cm, the silicon layer 12 has a carrier concentration of 1&#xd7;10cmto 5&#xd7;10cm, and that is larger by one digit or more than the carrier concentration of the silicon substrate, and the insulating filmhas a film thickness of 0.3 nm to 5 nm. Accordingly, a silicon light-emitting element that is applicable to a silicon photonics light source is realized.

Silicon light-emitting element

A semiconductor is provided with: a silicon substrateof a first conductivity type, including a first surface Sand a second surface S; a silicon layerof a second conductivity type, arranged on the first surface Sof the silicon substrate, including a third surface Sopposite a junction surface with the silicon substrate; a first electrodearranged on the second surface S; a second electrodearranged on the third surface S; and an argon added areaformed in a semiconductor area formed of the silicon substrateand the silicon layer. The argon added areaincludes an area indicating an argon concentration of a minimum of 1&#xd7;10cmand a maximum of 2&#xd7;10cm.

Semiconductor device

Growing community of inventors

Hamamatsu, Japan

Hirofumi Kan