公开(公告)号：US20250020860A1

公开(公告)日：2025-01-16

申请号：US18713707

申请日：2022-11-24

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Hideaki HASEGAWA ,  Keisuke TAKE ,  Masaki IWAMA ,  Shun-ichi MATSUSHITA

IPC: G02B6/02 ,  A61N5/06 ,  A61N5/067 ,  F21V8/00

Abstract: Provided is a light diffusion device capable of uniformly emitting light from the outer circumferential surface of a light-emitting part of an optical fiber. This light diffusion device 1 comprises an optical fiber 20 composed of a core 21 positioned on the radial center side and a clad 22 positioned on the outer circumferential side of the core 21, and emits laser light, which is incident from a proximal end section of the optical fiber 20, from the distal end side of the optical fiber 20, wherein: the optical fiber 20 has a light transmission part 20a which transmits the laser light incident from the proximal end section toward the distal end section, and a light-emitting part 20b which emits, from the outer circumferential surface, the laser light transmitted from the light transmission part 20a by removing a portion positioned on the outer circumferential side of the clad 22 on the distal end side; and the maximum thickness of the clad 22 in the light-emitting part 20b is smaller than the thickness of the clad 22 in the light transmission part 20a.

公开(公告)号：US20240377579A1

公开(公告)日：2024-11-14

申请号：US18784506

申请日：2024-07-25

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Hideaki HASEGAWA

IPC: G02B6/12 ,  G02B6/02 ,  G02B6/44

Abstract: A sensing cable includes a first optical fiber, a second optical fiber that extends along the first optical fiber and that is spaced from the first optical fiber, and a transmitting material that includes an intervention portion present between the first optical fiber and the second optical fiber, the transmitting material being configured to transmit light from the first optical fiber to the second optical fiber through the intervention portion.

公开(公告)号：US20230204441A1

公开(公告)日：2023-06-29

申请号：US18177904

申请日：2023-03-03

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Takashi FUJIHATA ,  Hideaki HASEGAWA ,  Takayori ITO ,  Hiroyuki TAMAOKA

IPC: G01L1/24

CPC classification number: G01L1/243

Abstract: An object detection device includes: an optical fiber at least partially including a sensor optical fiber configured to transmit light with a loss of 0.3 dB/m or more; and a light receiving unit configured to receive, from the optical fiber, the light received by the sensor optical fiber, wherein the object detection device is configured to detect an object based on an intensity of the light received by the light receiving unit.

公开(公告)号：US20230200658A1

公开(公告)日：2023-06-29

申请号：US18178666

申请日：2023-03-06

Applicant: FURUKAWA ELECTRIC CO., LTD. ,  ZEON CORPORATION

Inventor： Hideaki HASEGAWA ,  Hiroyuki TAMAOKA ,  Takashi FUJIHATA

IPC: A61B5/00 ,  A61B5/0215

CPC classification number: A61B5/0084 ,  A61B5/0215 ,  A61B2562/0285

Abstract: An in vivo pressure measurement device includes: a light source configured to output test light; an optical fiber, to which the test light is input, at least partially including a sensor optical fiber configured to transmit the test light with a loss of 0.3 dB/m or more; and a light receiving unit configured to receive the test light transmitted through the sensor optical fiber. The in vivo pressure measurement device is configured to measure pressure in a living body acting on the sensor optical fiber based on intensity of the test light received at the light receiving unit.

公开(公告)号：US20230161102A1

公开(公告)日：2023-05-25

申请号：US18047840

申请日：2022-10-19

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Hideaki HASEGAWA

IPC: G02B6/12 ,  G02B6/44 ,  G02B6/02

CPC classification number: G02B6/12028 ,  G02B6/443 ,  G02B6/02104 ,  G02B6/02395 ,  G02B2006/12138 ,  G02B2006/1209 ,  G02B2006/12069

Abstract: A sensing cable includes a first optical fiber, a second optical fiber that extends along the first optical fiber and that is spaced from the first optical fiber, and a transmitting material that includes an intervention portion present between the first optical fiber and the second optical fiber, the transmitting material being configured to transmit light from the first optical fiber to the second optical fiber through the intervention portion.

公开(公告)号：US20230296449A1

公开(公告)日：2023-09-21

申请号：US18184026

申请日：2023-03-15

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Hideaki HASEGAWA

IPC: G01K11/32

CPC classification number: G01K11/32

Abstract: A temperature sensor includes: a light source outputting test light; a sensor optical fiber transmitting, when the test light is inputted, the test light at any temperature within a temperature range of 20° C. to 150° C. with a loss of 0.3 dB/m or more; a light receiver receiving the test light transmitted by the sensor optical fiber; and a processing device detecting temperature of the sensor optical fiber based on intensity of the test light received by the light receiver. The sensor optical fiber includes a core, and a clad provided on an outer circumference of the core; and, when the temperature of the sensor optical fiber increases, the temperature sensor 1 detects the temperature with a change in the intensity of the test light received by the light receiver increases, caused by an increase in a refractive index difference between the core and the clad, and an increase in confinement of the test light transmitted in the core.

公开(公告)号：US20160285237A1

公开(公告)日：2016-09-29

申请号：US15177175

申请日：2016-06-08

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Hideaki HASEGAWA ,  Noriyuki YOKOUCHI ,  Taketsugu SAWAMURA ,  Satoshi IRINO ,  Junji YOSHIDA

IPC: H01S5/14 ,  H01S3/30 ,  H01S5/024 ,  H01S3/067 ,  H01S3/094

CPC classification number: H01S5/146 ,  H01S3/06754 ,  H01S3/094011 ,  H01S3/094096 ,  H01S3/302 ,  H01S5/02208 ,  H01S5/02248 ,  H01S5/02415 ,  H01S5/0652 ,  H01S5/141 ,  H01S5/142 ,  H01S2301/03

Abstract: A method of designing a semiconductor laser device includes: controlling a distance between the output-side reflection unit and the second reflection unit and an effective optical feedback κ to the semiconductor laser element, the effective optical feedback κ defined by a below-presented formula (1) including a circulating time τ of the light in the semiconductor laser element, a reflectivity R1 of the output-side reflection unit, and a reflectivity R2 of the second reflection unit; selecting a semiconductor laser device in which an LFF period is equal to or smaller than 20 ns as a semiconductor laser device in which high speed switching occurs between an FBG mode and an FP mode; and using the selected semiconductor laser device as an semiconductor laser device oscillating in a coherent collapse mode. κ=(1/τ)×(1−R1)×(R2/R1)1/2  (1)

Abstract translation: 一种半导体激光器件的设计方法，其特征在于，选择能够以FBG和FP模式之间快速切换的半导体激光器件，并以该器件以相干折叠模式振荡的方式使用半导体激光器件。 其中，通过控制从输出侧反射装置到第二反射装置的距离，半导体激光装置的LFF周期设定为等于或小于20ns，并将半导体激光元件的有效返回光量（κ）定义为 以下表达式：κ=（1 /τ）×（1-R1）×（R2 / R1）½其中τ表示半导体激光元件中的光的循环时间; R1表示输出侧反射装置的反射率; R2表示第二反射装置的反射率。

公开(公告)号：US20240298931A1

公开(公告)日：2024-09-12

申请号：US18546366

申请日：2022-02-14

Applicant: ZEON CORPORATION ,  TOHOKU UNIVERSITY ,  FURUKAWA ELECTRIC CO., LTD.

Inventor： Koji KAWAJIRI ,  Rihito KURODA ,  Yasuyuki FUJIHARA ,  Shota NAKAYAMA ,  Hideaki HASEGAWA

IPC: A61B5/145 ,  A61B5/1455

CPC classification number: A61B5/14532 ,  A61B5/1455

Abstract: A blood glucose measurement device capable of measuring a blood glucose in the blood while suppressing the influence of light absorption by water in a living body. The blood glucose measurement device includes a light source that irradiates light having a wavelength selected from a wavelength band of 800 to 950 nm, and a sensor that receives light transmitted, reflected, or scattered in a living body and outputs information according to the amount of light received. A blood glucose acquisition unit acquires the blood glucose in the blood in the living body based on the information obtained by the sensor.

公开(公告)号：US20140078580A1

公开(公告)日：2014-03-20

申请号：US14089661

申请日：2013-11-25

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Hideaki HASEGAWA ,  Masaki FUNABASHI ,  Kazuaki KIYOTA ,  Takeshi AKUTSU ,  Noriyuki YOKOUCHI ,  Kazutaka NARA

IPC: H01S5/042

CPC classification number: H01S5/0425 ,  H01S5/026 ,  H01S5/0261 ,  H01S5/125 ,  H01S5/2205 ,  H01S5/2231 ,  H01S5/5018 ,  H01S5/5036

Abstract: An optical amplifier device comprising an input/output section that inputs incident light and outputs emission light; a polarized light splitting section that causes a polarized light component of the incident light input from the input/output section to branch, and outputs first polarization mode light having a first polarization and second polarization mode light having a second polarization different from the first polarization; a polarization converting section that receives the first polarization mode light, converts the first polarization to the second polarization, and outputs first polarization converted light; and an optical amplifying section that amplifies the first polarization converted light input to one end of a waveguide, outputs the resulting amplified first polarization converted light from another end of the waveguide, amplifies the second polarization mode light input to the other end of the waveguide, and outputs the resulting amplified second polarization mode light from the one end of the waveguide.

Abstract translation: 一种光放大器装置，包括输入/​​输出部分，其输入入射光并输出发射光; 偏振光分离部，其使从所述输入输出部输入的入射光的偏振光分量分支，并输出具有第一偏振光和第二偏振光的第一偏振光，所述第一偏振光与所述第一偏振光具有第二偏振; 偏振转换部，其接收所述第一偏振光，将所述第一偏振转换为所述第二偏振，并输出第一偏振变换光; 以及光放大部，其对输入到波导的一端的第一偏振光转换光进行放大，从所述波导的另一端输出产生的放大后的第一偏振光变换光，放大输入到所述波导的另一端的第二偏振光， 并从波导的一端输出产生的放大的第二偏振模式光。

公开(公告)号：US20240172969A1

公开(公告)日：2024-05-30

申请号：US18546372

申请日：2022-02-14

Applicant: ZEON CORPORATION ,  TOHOKU UNIVERSITY ,  FURUKAWA ELECTRIC CO., LTD.

Inventor： Koji KAWAJIRI ,  Rihito KURODA ,  Yasuyuki FUJIHARA ,  Shota NAKAYAMA ,  Hideaki HASEGAWA ,  Takayori ITO ,  Hiroyuki TAMAOKA

IPC: A61B5/145 ,  A61B5/1455

CPC classification number: A61B5/14532 ,  A61B5/1455 ,  A61B2562/0238

Abstract: A biological information measuring device includes a light source that irradiates light, a sensor having a plurality of pixels arranged in an array in a two-dimensional plane and a saturation charge number of 1,000,000 or more. The sensor receives irradiated light transmitted, reflected, or scattered from the light source in a living body and outputs information according to the light intensity of the received light. A specific location selection unit selects a measurement target location of the measurement target for the biological information and a reference location different from the measurement target location, based on the information obtained by the image sensor. A biological information acquisition unit acquires biological information from the information obtained by the sensor at the measurement target location, using the information obtained by the sensor at the reference location as a reference.