Hamamatsu-photonics K.k.

Toyota Jidosha Kabushiki Kaisha

Osaka University

Takashi Kurita

Masayuki Fujita

Toshiyuki Kawashima

Yoshinori Kato

Takashi Sekine

Yoshinori Tamaoki

Takaaki Morita

Hirofumi Kan

Yuu Takiguchi

Naoki Nakamura

Osamu Komeda

Norio Kurita

Noriaki Miyanaga

Kazuhisa Fujita

Hirozumi Azuma

Nakahiro Satoh

Shinichiro Okihara

Katsuhiro Ishii

Yasuhiko Nishimura

Yoneyoshi Kitagawa

Takeshi Watari

Yoshitaka Mori

Ryohei Hanayama

Atsushi Sunahara

Ryo Yoshimura

Yuki Kabeya

Ryo Makino

Yoshio Mizuta

Kazuki Kawai

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

Disclosed is a laser device including: a laser light source configured to emit laser light; a phase control unit configured to receive the laser light emitted from the laser light source, to control a spatial phase of a portion of the laser light, to emit the portion of the light as control light, and to emit another portion of the laser light as non-control light; a first optical system configured to irradiate an object with the control light emitted from the phase control unit; a detector configured to detect the non-control light emitted from the phase control unit; a second optical system configured to cause the non-control light emitted from the phase control unit to converge toward a detection surface of the detector.

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 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

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 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

A laser devicedemultiplexes seed light Linto a plurality of beams of laser light Land then continuously optically amplifies the plurality of beams of the laser light Lwith an amplifier. Therefore, its amplification factor can be set higher than that in the case of amplifying pulsed laser light. When producing multiplexed light Lby multiplexing the beams of the amplified laser light Lwith a diffraction grating, respective phases of the beams of the laser light Lare controlled such that an output peak of the multiplexed light Lrepeatedly appears at a converging position Pat a predetermined time interval. This produces pulsed laser light at the converging position Pfrom a plurality of beams of laser light Lamplified at a high amplification factor. Hence, this laser devicecan produce pulsed laser light with a high output.

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Hamamatsu, Japan

Takashi Kurita