Sumitomo Electric Industries, Limited

Other

Agency of Industrial Science and Technology

Yoshiki Kuhara

Hiromi Nakanishi

Naoyuki Yamabayashi

Takeshi Okada

Mitsuaki Nishie

Yasuhiro Iguchi

Akira Yamaguchi

Shigeo Hayashi

Yasushi Fujimura

Masami Tatsumi

Hitoshi Terauchi

Takashi Iwasaki

Makoto Inagaki

Koji Mori

Koji Tada

Ichiro Tonai

Kenji Saito

Kazumasa Toya

Yoshiya Abiko

Kohji Tada

Takeshi Fujimoto

Tsutomu Mitsui

Takashi Sasaki

Youichi Nagai

Hiroo Kanamori

Manabu Shiozaki

Rui Mikami

Tomoyuki Funada

Masaki Furumai

Tadashi Saito

Hisato Michikoshi

Keiichi Fukuda

Hirokuni Nanba

Yutaka Kakuno

Manabu Yoshimura

Kazunori Yoshida

Masayoshi Tatsumi

Yoichiro Yamaguchi

Hideaki Koseki

Konji Tada

Yuuji Hamazaki

Akihiko Kawakami

Nobuyuki Sakaue

Provided is a solar cell for which accurate mutual alignment between a condenser lens and a power generating element corresponding thereto can be performed. In a solar cell, a plurality of grid electrodeseach formed in a linear shape are arrayed on a light receiving surfacealong the width direction of the light receiving surface. The plurality of grid electrodesinclude a first center grid electrodeforming a cross portionexhibiting a center-specific geometry caused by electrodes crossing each other at the center of the light receiving surface

Solar cell, concentrator photovoltaic unit, concentrator photovoltaic module, and method for producing concentrator photovoltaic module

Mutual alignment between a condenser lens and its power generating element can be performed easily and accurately. This method for producing a concentrator photovoltaic unit includes: a first step of emitting linear laser beams respectively toward incident positionson an incident surface; and a second step of performing positional adjustment between a Fresnel lensand a power generating element part, based on positional relationship between the power generating element partand beam images respectively formed by the linear laser beams at a time when the beam images and the power generating element partare seen along an optical axis S from the incident surfaceside of the Fresnel lens. Four incident positionsin the first step are set such that at least one pair of beam images, among the beam images respectively formed by the linear laser beams, cross each other at an optical axis point Sof the Fresnel lenswhen the power generating element partside is seen along the optical axis S from the incident surfaceside of the Fresnel lens

Method for producing concentrator photovoltaic unit, production apparatus used in the method, method for producing concentrator photovoltaic module, and production apparatus used in the method

A concentrator photovoltaic unit being an optical system base unit includes: a concentrating portion configured to converge sunlight; a cell configured to receive light converged by the concentrating portion to generate power; a package including a frame portion, the frame portion having insulating property and surrounding the cell, the package being in integrated relation with the cell; a shield plate provided between the concentrating portion and the cell, and including an opening allowing light converged by the concentrating portion to selectively pass therethrough; and a protection plate being a heat-resistant member provided on the frame portion to make the cell expose to the light and to shield the package, the protection plate being in contact with nothing but the frame portion, and securing a predetermined insulation distance from a live portion of the cell.

Concentrator photovoltaic unit, concentrator photovoltaic module, concentrator photovoltaic panel, and concentrator photovoltaic apparatus

An optical modulecomprises a first optical element F, a first light receiving subassembly PD, a second optical element F, a second light receiving subassembly PD, a light emitting subassembly LDfor generating light, and a light transmitting partoptically coupled to the first optical element. The light emitting subassembly LD, the first optical element F, the second optical element Fand the first light receiving subassembly PDare arranged along a predetermined plane S. The light emitting subassembly LD, the first optical element F, the second optical element F, and the second light receiving subassembly PDare arranged along another predetermined plane S. The predetermined plane Sintersects at a predetermined angle with the other predetermined plane S

Optical module, optical transceiver, and optical joint sleeve

An optical data link includes a circuit board and an optical module component. The circuit board includes first and second mounting sections on a principal plane thereof. A step is formed between the first mounting section and the second mounting section. The first mounting section has the optical module component, and the second mounting section has an electron device. The optical module component includes a mounting component, a semiconductor optical device, and an optical transmission medium. The semiconductor optical device of the optical module component is electrically connected to the electron device, and is mounted on a first region of the mounting component. The optical transmission medium is supported by a second region of the mounting component, and is optically coupled with the semiconductor optical device.

Optical data link and method of manufacturing optical data link

An optical receiver includes a light-receiving part and a control part. The light-receiving part includes an APD, a PIN-PD, and a branching optical device. First signal light is incident on the light-receiving part and is divided into second signal light and third signal light which are incident on the APD and the PIN-PD, respectively, by the branching optical device. Due to this structure, the third signal light is incident on the PIN-PD without the quantity thereof being varied depending on the polarization state of the first signal light. The control part generates a supply voltage at which a desired avalanche multiplication factor is obtained in the APD on the basis of the output current from the PIN-PD. According to the above-described structure, the avalanche multiplication factor of the APD is accurately controlled on the basis of the output current of the PIN-PD.

Optical receiver

Disclosed is a photodiode array which includes a plurality of p-i-n photodiodes arrayed on a semi-insulative semiconductor substrate, each photodiode including an n-type semiconductor layer grown on the substrate, an i-type semiconductor layer grown on the n-type semiconductor layer, a p-type semiconductor layer grown on the i-type semiconductor layer, an n-type electrode provided on the n-type semiconductor layer in a region exposed by partially removing the p-type semiconductor layer and the i-type semiconductor layer, and a p-type electrode provided on the p-type semiconductor layer. A trench is provided between the two adjacent photodiodes by partially removing the p-type semiconductor layer, the i-type semiconductor layer, and the n-type semiconductor layer. Consequently, the size and pitch of the photodiodes can be decreased and crosstalk between the photodiodes can be reduced. Also disclosed is an optical receiver device including the photodiode array.

Photodiode array and optical receiver device including the same

An optical receiver is provided with an optical-signal-receiving section and a controlling section. The optical-signal-receiving section incorporates a photodetector. The photodetector has an APD. Through a passivation film, a photoconductor is placed on a portion of a surface of the APD which remains unoccupied by an optical-signal-receiving area of the APD. When this structure is employed, the signal for controlling the avalanche multiplication factor of the APD can be obtained from the photoconductor. Consequently, the signal can be obtained with a simple structure. Furthermore, the photoconductor has a good linearity of the output current even to a weak lightwave. As a result, the output current I for controlling the avalanche multiplication factor of the APD can be obtained with high accuracy.

Photodetector and optical receiver

The present invention provides an optical receiver that uses an avalanche photodiode (APD) whose multiplication factor m is controlled to compensate the temperature dependence thereof. An optical module of the present invention includes a light-receiving device in addition to the APD. The light-receiving device may be a semiconductor thin film or a PIN photodiode, and is disposed in front of the APD. Accordingly, the light-receiving device receives a portion of signal light, and transmits a rest portion thereof. The APD receives the rest portion of the signal light. The bias voltage applied to the APD is so controlled that a first photocurrent generated in the light-receiving device and a second photocurrent generated in the APD maintain a constant ratio.

Optical module and an optical receiver using the same

In an optical communications module comprising one or more dielectric substrates equipped with an optical transmitter section, an optical receiver section or an optical transceiver section, and a chassis encasing all of them, a metal part is formed on one side of at least one of the dielectric substrates such that the metal part constitutes the whole or a part of the exterior surface of the chassis so that the length of heat conduction from a dielectric substrate with heat-generating components installed thereon can be minimized so as to efficiently release heat through the metal part to outside, curbing a temperature increase within the chassis. Thus, the optical communications module can exhibit excellent performance.

Optical communications module

An optical receiver includes a PIN photodiode (PIN-PD) having an incident surface for receiving signal light, the PIN-PD transmitting a part of the signal light to the surface opposite to the incident surface, and an avalanche photodiode (APD) having an incident surface for receiving light transmitted through the PIN-PD. In the optical receiver, the ratio of the quantity of signal light detected by the PIN-PD and the ratio of the quantity of signal light detected by the APD are not affected by the polarization state of the signal light incident on the optical receiver, and accordingly the avalanche multiplication factor of the APD is suitably controlled on the basis of the signal light detected by the PIN-PD.

An optical transceiver module is comprised of a mount substrate, a transmitting semiconductor laser, a receiving photodiode, a communicating hole, and a first filter. The mount substrate is provided so as to intersect with a predetermined axis X and has first and second principal surfaces facing each other. The transmitting semiconductor laser is mounted on the first principal surface and is configured to emit light of a first wavelength. The receiving photodiode is mounted on the predetermined axis X and on the second principal surface and is configured to receiving light of a second wavelength. The communicating hole is provided in a region of the mount substrate where the receiving photodiode is mounted, and makes the first and second principal surfaces communicate with each other.

Optical transceiver modules

An optical module includes a semiconductor optical device, an optical fiber, a ferrule, and a mounting component. The optical fiber is optically coupled to the semiconductor optical device. The ferrule holds the optical fiber. The mounting component includes a first support groove for supporting the ferrule and a second support groove for supporting the optical fiber. The semiconductor optical device is mounted on the mounting component. The first and second support grooves are sequentially arranged in a direction of a predetermined axis. The second support groove has one end and the other end. The depth of the second support groove decreases from the one end toward the other end. With such a structure, the optical module allows the optical fiber to be positioned with high accuracy onto the mounting component.

Optical module and mounting component

In a surface-mounted optical transmission module, a laser diode serving as a light emitting device that converts an electric signal into an optical signal, and an optical waveguide serving as an optical transmission line that transmits and outputs the optical signal from the laser diode are placed on a substrate. A driving device for controlling the driving of the laser diode is placed at a predetermined position on the upper surface of the optical waveguide element, which is on the same side as an optical waveguide element (on the downstream side in the optical-signal transmitting direction) relative to the laser diode. This configuration eliminates the necessity of placing the driving device at a position distanced from the laser diode, whereby the size of the optical transmission module can be reduced, and this allows the optical transmission module to transmit optical signals at high speed.

Optical transmission module

Growing community of inventors

Osaka, Japan

Yoshiki Kuhara