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公开(公告)号：US11287574B2
公开(公告)日：2022-03-29
申请号：US17018108
申请日：2020-09-11
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Masaki Iwama , Shunichi Matsushita
IPC: G02B6/26 , G02B6/04 , G02B6/34 , B23K26/064
Abstract: An irradiation spot of the laser beam having a large power density can be formed by a condensing apparatus which combines a plurality of laser lights without using a power combiner. The condensing apparatus comprises an optical fiber bundle formed of a plurality of optical fibers. One end of the optical fiber bundle forms an incident side bundle end, while the other end forms an emission side bundle end. The optical fiber bundle includes, at the emission side bundle end, an optical deflection unit that deflects at least two light beams emitted from respective light emission ends of at least two optical fibers toward different directions, respectively, such that the at least two light beams overlap each other on at least one cross section at rear on an optical path of the emission side bundle end and are then scattered.
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公开(公告)号：US20020176153A1
公开(公告)日：2002-11-28
申请号：US09654974
申请日：2000-09-05
Applicant: The Furukawa Electric Co., Ltd.
Inventor： Shunichi Matsushita , Shu Namiki , Yoshihiro Emori
IPC: H01S003/00
CPC classification number: H01S3/302 , H01S3/094003 , H01S3/094073 , H01S3/094096 , H01S3/2375 , H01S5/146
Abstract: Abstract of DisclosureAn optical signal amplifier comprises a light source, a depolarizer, and a gain medium that transfers energy from a pump beam output from the depolarizer to the optical signal. The depolarizer may comprise one or more birefringent optical fibers which support two polarization modes, a fast mode and a slow mode. The light propagates in the fast mode at a higher velocity than the light propagates in the slow mode so as to impart phase delay as the light propagates in the birefringent optical fibers, thereby at least partially depolarizing the beam.
Abstract translation: 一种光信号放大器包括光源，去极化器和将从去偏振器输出的泵浦光束的能量传递到光信号的增益介质。 去偏振器可以包括支持两种偏振模式的一个或多个双折射光纤，即快速模式和慢速模式。 光在快速模式下以比在慢速模式中传播的光速更高的速度传播，以便当光在双折射光纤中传播时给予相位延迟，从而至少部分地使光束去极化。
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公开(公告)号：US12184038B2
公开(公告)日：2024-12-31
申请号：US17478193
申请日：2021-09-17
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Yoshiki Nomura , Shunichi Matsushita
IPC: H01S3/00 , H01S5/00 , H01S5/0239 , H01S5/40 , G02B6/42 , H01S5/02251
Abstract: A laser apparatus includes: one or more laser diodes and two or more optical combiners. Further, output sides of the one or more laser diodes are connected to an input side of one optical combiner among the two or more optical combiners, and an output side of the one optical combiner is connected to an input side of an optical combiner other than the one optical combiner.
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公开(公告)号：US20190288479A1
公开(公告)日：2019-09-19
申请号：US16433522
申请日：2019-06-06
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Ryo KAWAHARA , Shunichi Matsushita
Abstract: A pulsed laser device includes a laser light source, an electro-optic modulator, a laser light source driver, an electro-optic modulator driver, and a controller to control the laser light source driver and the electro-optic modulator driver. The laser light source outputs pulsed laser light pulse-modulated by the laser light source driver. The electro-optic modulator outputs pulsed laser light obtained by causing the electro-optic modulator driver to pulse-modulate the pulsed laser light from the laser light source. The control unit controls the laser light source driver and the electro-optic modulator driver such that the electro-optic modulator turns on at least while the laser light source is on and the electro-optic modulator turns on at least once while the laser light source is off, thereby increasing a duty ratio of the pulse modulation for the electro-optic modulator relative to a duty ratio of the pulse modulation for the laser light source.
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Patent Agency Ranking
公开(公告)号：US12197015B2
公开(公告)日：2025-01-14
申请号：US17819027
申请日：2022-08-11
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Yoshiki Nomura , Ryo Kawahara , Kyosuke Yamauchi , Shunichi Matsushita , Kengo Watanabe
Abstract: An optical fiber connection state determination system determines a state of connection between a first optical fiber configured to propagate a test light input from a light source and a second optical fiber in a connector configured to detachably connect an output side from which the test light is output in the first optical fiber and an input side of the second optical fiber to which the test light propagated by the first optical fiber and output from the first optical fiber is input, and includes: a measurement unit configured to measure an intensity of a reflected light reflected and propagating thorough the first optical fiber in the test light; and a determination unit configured to determine the state of connection between the first optical fiber and the second optical fiber in the connector based on the intensity measured by the measurement unit.
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公开(公告)号：US11553964B2
公开(公告)日：2023-01-17
申请号：US17190715
申请日：2021-03-03
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Yoshiki Nomura , Kengo Watanabe , Shunichi Matsushita
Abstract: An optical probe includes: an optical fiber; a reflecting portion; and a traveling direction changing portion changing a traveling direction of a laser beam of a first wavelength that has transmitted through the reflecting portion to a direction different from a traveling direction before transmitting through the reflecting portion. Further, the traveling direction changing portion is configured by a bending structure having a structure in which a portion on a distal end side of the optical fiber is bent, and the reflecting portion is provided closer to a proximal end side of the optical fiber than the bending structure.
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公开(公告)号：US11050211B2
公开(公告)日：2021-06-29
申请号：US16433522
申请日：2019-06-06
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Ryo Kawahara , Shunichi Matsushita
Abstract: A pulsed laser device includes a laser light source, an electro-optic modulator, a laser light source driver, an electro-optic modulator driver, and a controller to control the laser light source driver and the electro-optic modulator driver. The laser light source outputs pulsed laser light pulse-modulated by the laser light source driver. The electro-optic modulator outputs pulsed laser light obtained by causing the electro-optic modulator driver to pulse-modulate the pulsed laser light from the laser light source. The control unit controls the laser light source driver and the electro-optic modulator driver such that the electro-optic modulator turns on at least while the laser light source is on and the electro-optic modulator turns on at least once while the laser light source is off, thereby increasing a duty ratio of the pulse modulation for the electro-optic modulator relative to a duty ratio of the pulse modulation for the laser light source.
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公开(公告)号：US11036024B2
公开(公告)日：2021-06-15
申请号：US16428739
申请日：2019-05-31
Applicant: Furukawa Electric Co., Ltd.
Inventor： Hiroki Tanaka , Kenji Yokomizo , Tomohiro Ishimura , Yutaka Hoshino , Masaki Iwama , Eisuke Otani , Shunichi Matsushita , Yoshihiro Arashitani , Takeshi Yagi
Abstract: A method for manufacturing an intermittent bonding type optical fiber ribbon which is capable of forming non-connection portions and intermittent connection portions between adjacent coated optical fibers formed into an optical fiber ribbon by performing a laser processing for the ribbon through irradiation with a pulse laser light, thereby making it possible to rapidly form the intermittent connection portions and the non-connection portions while maintaining high linear velocity of the coated optical fiber. The non-connection portions and the intermittent connection portions are formed in the obtained intermittent bonding type optical fiber ribbon through the irradiation with the pulse laser light, so the intermittent bonding type optical fiber ribbon becomes the intermittent bonding type optical fiber ribbon, which is capable of securing operability during collective connection and surely being subjected to an intermediate branching without damaging cable characteristics during high density mounting.
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公开(公告)号：US20190166701A1
公开(公告)日：2019-05-30
申请号：US16258447
申请日：2019-01-25
Applicant: Furukawa Electric Co., Ltd.
Inventor： Masaki Iwami , Shunichi Matsushita
IPC: H05K3/46 , H05K3/38 , B23K26/354 , C23C26/00
Abstract: The present disclosure provides a laser processing method of performing surface processing on a copper surface by using laser. The method forms a periodic structure on the order of laser wavelength on a copper surface by irradiating the copper surface with pulse laser having a laser power close to a threshold beyond which processing of copper foil is possible and having a pulse width on the order of nanoseconds, and forms a coating on the copper surface. in this manner, the copper surface can be processed to have a favorable electric characteristic and desirable adhesion with a resin material.
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