公开(公告)号：US20200274329A1

公开(公告)日：2020-08-27

申请号：US16328579

申请日：2017-09-13

Applicant: MITSUBISHI ELECTRIC CORPORATION

Inventor： Yohei HOKAMA ,  Koichi AKIYAMA

IPC: H01S5/22 ,  H01S5/026

Abstract: The object is to provide a technology capable of efficiently injecting a current into a core layer of a buried waveguide. On one end side of the substrate, a buried waveguide including a core layer, a cladding layer, and a current blocking layer is disposed, both sides of the core layer in a layer-stacking direction are sandwiched by the cladding layer, and both sides of the core layer in a width direction that is perpendicular to the layer-stacking direction are sandwiched by the current blocking layer. On another end side of the substrate, a ridge waveguide including the core layer and the cladding layer is disposed, and both sides of the core layer in the layer-stacking direction are sandwiched by the cladding layer.

公开(公告)号：US20190258003A1

公开(公告)日：2019-08-22

申请号：US16331376

申请日：2017-08-01

Applicant: Mitsubishi Electric Corporation

Inventor： Kosuke SHINOHARA ,  Koichi AKIYAMA

IPC: G02B6/12 ,  G02B6/125 ,  G02B6/122

Abstract: Two input waveguides are made of a semiconductor material. One output waveguide is made of a semiconductor material. A multi-mode-interference part is made of a semiconductor material. The multi-mode-interference part has an incoming end surface connected to the input waveguides, and an outgoing end surface opposite to the incoming end surface and connected to the output waveguide. The multi-mode-interference part has a waveguide width wider than the waveguide widths of the input waveguides and the waveguide width of the output waveguide. Two unwanted-light waveguides are made of a semiconductor material. The unwanted-light waveguides are connected to the outgoing end surface of the multi-mode-interference part so as to sandwich the output waveguide. The unwanted-light waveguides each satisfy a single-mode condition.

公开(公告)号：US20170227828A1

公开(公告)日：2017-08-10

申请号：US15402633

申请日：2017-01-10

Applicant: Mitsubishi Electric Corporation

Inventor： Satoshi NISHIKAWA ,  Toshiyuki TANAKA ,  Koichi AKIYAMA ,  Eiji YAGYU

IPC: G02F1/225 ,  G02F1/017

CPC classification number: G02F1/2255 ,  G02F1/01708 ,  G02F1/2257 ,  G02F2001/212 ,  G02F2203/21

Abstract: Provided is a technique for reducing, using a simple circuit configuration, an amplitude difference between electric signals that are input to respective optical waveguide arms. An optical modulator includes: an optical demultiplexer that splits continuous wave light as received; first and second optical waveguide arms through which the continuous wave light as split propagates; an optical phase n shifter that introduces a phase shift of π to the continuous wave light as split; an optical multiplexer combines the continuous wave light propagating through the first and second optical waveguide arms; first and second signal electrodes that respectively input the electric signals to the first and second optical waveguide arms; a junction capacitance connected in shunt to at least one of the first and second signal electrodes; and a DC voltage source that applies a DC voltage to the junction capacitance.

公开(公告)号：US20240231176A1

公开(公告)日：2024-07-11

申请号：US18561304

申请日：2021-05-25

Applicant: Mitsubishi Electric Corporation

Inventor： Masakazu TAKABAYASHI ,  Yosuke SUZUKI ,  Satoshi NISHIKAWA ,  Koichi AKIYAMA

IPC: G02F1/225 ,  G02F1/21

CPC classification number: G02F1/2257 ,  G02F1/212

Abstract: A semiconductor optical phase modulator includes an optical phase modulation element, a first semiconductor optical amplifier to amplify light input to the optical phase modulation element, and a second semiconductor optical amplifier to amplify modulated signal light output from the optical phase modulation element. A light input end of the semiconductor optical phase modulator is a light input end face of the first semiconductor optical amplifier. A light output end of the semiconductor optical phase modulator is a light output end face of the second semiconductor optical amplifier.

公开(公告)号：US20240151636A1

公开(公告)日：2024-05-09

申请号：US18282233

申请日：2021-03-23

Applicant: Mitsubishi Electric Corporation

Inventor： Shusaku HAYASHI ,  Koichi AKIYAMA ,  Yuki TSUDA

IPC: G01N21/17

CPC classification number: G01N21/171

Abstract: In a biological component measurement device according to the present disclosure, a modulation unit intensity-modulates excitation light emitted from an excitation light source and the intensity-modulated excitation light is incident to an optical medium. The modulation unit switches a plurality of modulation frequencies in order from a low frequency to a high frequency. The plurality of modulation frequencies include a first frequency and a second frequency higher than the first frequency. A light position detector detects a position of probe light when the sample is irradiated with excitation light intensity-modulated at the first frequency and a position of probe light when the sample is irradiated with excitation light intensity-modulated at the second frequency. The biological component acquisition unit measures a biological component of the sample based on the position of the probe light at the first frequency and the position of the probe light at the second frequency.

公开(公告)号：US20230251417A1

公开(公告)日：2023-08-10

申请号：US18011848

申请日：2020-07-03

Applicant: Mitsubishi Electric Corporation

Inventor： Yosuke SUZUKI ,  Koichi AKIYAMA

IPC: G02B6/12 ,  G02F1/225 ,  G02F1/017

CPC classification number: G02B6/12 ,  G02F1/225 ,  G02F1/017 ,  G02F2203/70

Abstract: A semiconductor optical integrated element according to the present disclosure includes:; a first optical amplifier which amplifies a signal beam inputted from a first end surface; a first passive optical waveguide which guides the amplified signal beam toward a direction different from a direction of the optical waveguide; an optical splitter which splits the guided signal beam into a plurality of signal beams; a phase modulator which is connected to the first passive optical waveguide and performs phase modulation on the plurality of signal beams; a second passive optical waveguide which guides each phase-modulated signal beam toward the direction of the optical waveguide; an optical multiplexer which multiplexes the plurality of phase-modulated signal beams into one signal beam; and a second optical amplifier which amplifies the signal beam guided by the second passive optical waveguide, and whose saturated beam output is smaller than that of the first optical amplifier.

公开(公告)号：US20220404275A1

公开(公告)日：2022-12-22

申请号：US17772527

申请日：2020-07-27

Applicant: Mitsubishi Electric Corporation

Inventor： Shusaku HAYASHI ,  Koichi AKIYAMA ,  Yuki TSUDA

IPC: G01N21/41 ,  A61B5/1455

Abstract: A biological component measurement apparatus includes an optical medium, an excitation light source, a probe light source, and a light position detector. The optical medium includes a sample placement surface. The excitation light source emits excitation light toward a sample placed on the sample placement surface. The probe light source emits probe light that travels through the optical medium. The light position detector detects the position of the probe light outgoing from the optical medium. The optical medium is formed from chalcogenide glass.

公开(公告)号：US20210059574A1

公开(公告)日：2021-03-04

申请号：US16962229

申请日：2018-02-02

Applicant: Mitsubishi Electric Corporation

Inventor： Kosuke SHINOHARA ,  Kentaro ENOKI ,  Koichi AKIYAMA ,  Shimpei OGAWA ,  Daisuke FUJISAWA

IPC: A61B5/1455 ,  G01N21/359 ,  G01N21/41

Abstract: A biological material measuring apparatus includes an infrared light source unit to radiate infrared light in entirety or part of a wavelength region including absorption wavelengths of a biological material, a prism to cause the infrared light radiated from the infrared light source unit to pass therethrough and emit the infrared light to a living body surface while being in contact with the living body surface, a light source to radiate light of a wavelength in a visible light region or a near infrared region to the prism, and a light position detector to detect a path of light from the light source by detecting light from the light source which is emitted from the prism.

公开(公告)号：US20200225556A1

公开(公告)日：2020-07-16

申请号：US16650186

申请日：2018-08-09

Applicant: Mitsubishi Electric Corporation

Inventor： Shusaku HAYASHI ,  Koichi AKIYAMA

IPC: G02F1/225

Abstract: A semiconductor optical modulator includes a modulation region and a non-modulation region. A first width of a first ground electrode in the non-modulation region is larger than a second width of the first ground electrode in the modulation region. A third width of a second ground electrode in the non-modulation region is larger than a fourth width of the second ground electrode in the modulation region. In the non-modulation region, a first insulating layer is disposed between a first optical waveguide and a first traveling wave electrode and between a second optical waveguide and a second traveling wave electrode. For this reason, a bandwidth of the semiconductor optical modulator can be widened.

公开(公告)号：US20200060620A1

公开(公告)日：2020-02-27

申请号：US16344124

申请日：2017-08-25

Applicant: Mitsubishi Electric Corporation

Inventor： Shimpei OGAWA ,  Daisuke FUJISAWA ,  Koichi AKIYAMA ,  Kentaro ENOKI ,  Kosuke SHINOHARA

IPC: A61B5/00

Abstract: An infrared light source radiates infrared light. An ATR prism receives, on a first end face, the infrared light radiated from the infrared light source, causes the received infrared light to pass therethrough while repeating total reflection off a second end face and a third end face, and emits the infrared light that has passed therethrough from the third end face. An infrared photodetector detects the intensity of the infrared light emitted from the ATR prism. Strain sensors, which are contact sensors of one type, are attached to the ATR prism and configured to detect a contact state between the ATR prism and a measurement skin.