Nec Corporation

Other

Taro Kaneko

Isao Tomita

Takuya Anzawa

Masaaki Nido

Mitsunori Kanemoto

Hikaru Kouta

Mikio Oda

Yutaka Urino

Mitsuru Kurihara

Tadahiko Hanada

Masahiko Namiwaka

Provided is a moving image playback method, a moving image playback device, and a computer readable storage medium which stores a moving image playback program which enable a plurality of moving images to be played back simultaneously on a single smart device, and enable the plurality of moving images to be moved and magnified/reduced within the smart device screen. For example, a moving image playback device of the present invention includes an operation part that performs an operation related to playback of a moving image; a control part that controls a request from the operation part; and a display part that displays the moving image according to the control of the control part. The control part generates a first moving image display view which is a movable region of a moving image to be projected in the display part; generates a second moving image display view which enables the moving image to be moved on the first moving image display view; plays back the moving image on the second moving image display view; obtains, on the basis of coordinates of the four corners of the second moving image display view, a pre-movement position of the moving image selected via the operation part; calculates a post-movement position of the moving image that was moved via the operation part by reflecting an amount of movement of the moving image on the coordinates of the four corners of the second moving image display view; and displays the moving image at the post-movement position.

Moving image playback method, moving image playback device, and computer readable storage medium storing a moving image playback program

To shorten the length of an electric wiring between a capacitor and a PD, and to improve high frequency characteristics. An optical module of the present invention includes a light receiving element disposed at such a position that light from an optical transmission path is received on a light receiving surface in a state that the light receiving surface faces the optical transmission path; a spacer jointed to the optical transmission path and to the light receiving element in such a manner that a gap between the optical transmission path and the light receiving element is kept at a predetermined distance that light from the optical transmission path is allowed to enter the light receiving surface; and a capacitor electrically connected to the light receiving element, and disposed along with the light receiving element on a surface of the spacer on the same side as that joined to the light receiving element.

Optical module with capacitor and digital coherent receiver using the same

An optical transmission module is provided which has excellent long-term reliability, high manufacturing efficiency and a smaller optical output loss and which facilitate its downsizing, weight saving and high integration. The optical transmission module is provided with a first optical deviceplaced on an output side, a second optical deviceplaced on the first optical devicealigned with an optical axis of the first optical device, a packageincluding the first and second optical devicesand, and an optical fiberconfigured to guide light emitted from the first optical deviceto the outside of the package. The first optical deviceand the second optical deviceare in close contact with each other on the surface perpendicular to the optical axis.

Optical transmission module and manufacturing method thereof

An optical communication module is fabricated to include a refraction plate made of an inorganic material whose refractive index varies little with temperature. The refraction plate is inserted in the optical path to perform optical axis compensation in a single lens system with long focal length.

Optical communication module using refraction plate for optical axis compensation, and manufacturing method of the same

A thermal contraction stress and a residual contraction stress caused by a difference between the linear expansion coefficients of an optical element unit and a carrier are reduced as much as possible. An optical module includes an optical element unit including optical elements requiring a stress control, and a carrier which supports the optical element unit. As the carrier is made of a material having the same property as that of the substrate material of the optical element, the thermal contraction stress is reduced.

Optical module

Optical waveguide device has waveguide strip-shaped in the depth direction of the drawing and protruding from peripheral portion. A core (not illustrated) is disposed inside waveguide. Wall to be cut is integrated with waveguide to form one core layer. No unevenness occurs in a cutting line of wall indicated with broken line. Accordingly, high-precision cutting is enabled by cutting wall along the cutting line.

Optical waveguide device and fabricating method thereof

The present invention aims to provide a miniaturized optical laser module that eliminates shift in contacting surfaces when contacting and fixing with adhesive two element carriers respectively holding an optical element and obtains a smooth adhesion fixation. A semiconductor laser module that has a configuration in which the element carriers respectively arranged with optical elements for laser oscillation are contacted and securely attached to each other to optically connect the optical elements and form a semiconductor laser, and externally outputs a laser light to an optical fiber arranged in advance via an optical system; where collar parts for setting contacting areas to an enlarged state when contacting the element carriers and being removably configured are integrally arranged on each element carrier on both side end faces at a contacting surface of each element carrier.

Semiconductor laser module, semiconductor laser, and method of assembling the same

Distortion of the temperature control element and the package by thermal deformation or mechanical deformation is prevented from being transmitted to the optical element as stress, and at the same time, constant temperature control of the optical element is realized. An optical element unit including an optical element that requires temperature control and an optical component that does not require temperature control, and a temperature control element for performing temperature adjustment of the optical element are arranged. The temperature control element performs temperature adjustment control of the optical element through a region mounted with the optical component of the optical element unit.

Provided are a semiconductor laser module and a method of assembling the same. The semiconductor laser module comprises a first semiconductor optical element and a second semiconductor optical element as a pair and a lens. The first semiconductor optical element is for outputting light signal and the second semiconductor optical element is for performing signal processing on the light signal outputted from the first semiconductor optical element. The lens is for correcting a relation between optical axes of the first semiconductor optical element and the second semiconductor optical element so as to lens-couple the optical axes. The first semiconductor optical element, the second semiconductor optical element and the lens are mounted on a common element carrier.

Semiconductor laser module and method of assembling the same

Optical waveguide devicehas waveguidestrip-shaped in the depth direction of the drawing and protruding from peripheral portionA core (not illustrated) is disposed inside waveguideWallto be cut is integrated with waveguideto form one core layer. No unevenness occurs in a cutting line of wallindicated with broken lineAccordingly, high-precision cutting is enabled by cutting wallalong the cutting line.

The present invention relates to a device and a method for monitoring each of the propagated light beams that are propagated in each waveguide of an arrayed waveguide device and a method of fabricating the device. In the prior art, problems were encountered in deriving monitor light and photodetecting the derived monitor light within the waveguide substrate. In the present invention, waveguide directional couplers are formed in the spaces between the arrayed waveguides to derive a portion of the propagated light as monitor light. Cavities are provided at the ends of auxiliary waveguides connected to the directional couplers, and monitor light is guideded into these cavities. The monitor light, after being reflected upward or downward of the substrate by optical path conversion elements installed inside the cavities, is photodetected by photodiodes. The optical path conversion elements can be fabricated by inserting metal bumps into the cavities and then forming the bumps with a mold.

Optical circuit element and production method therefor, array-form optical circuit element, optical circuit device using it

An optical waveguide device includes a substrate, a metal layer arranged on the substrate, at least claddings arranged on the metal layer and in the claddings dents are formed, at least cores arranged in the claddings, whose end faces are exposed on the sides of the dents, for transmitting lights, optically non-transmissive material coating the inside faces of the dents except the sides on which the end faces of the cores are exposed, at least light receiving elements for receiving lights emitted from the end faces of the cores and inputting the lights into light receiving faces of the light receiving elements.

Optical waveguide device and method of manufacture thereof

An optical waveguide device includes a substrate, a metal layer arranged on the substrate, a plurality of claddings arranged on the metal layer via grooves, a core, arranged in each of the plurality of claddings, for transmitting lights, optically non-transmissive material coating the insides of the grooves, and optically non-transmissive and electrically insulating material coating the top faces of the claddings.

An optical waveguide device according to the invention is provided with a substrate (), a metal layer () arranged on the substrate (), a plurality of claddings () arranged on the metal layer () via grooves (), cores () arranged in the claddings () for transmitting lights, optical waveguides () having optically non-transmissive material () coating the insides of the grooves () and optically non-transmissive and electrically insulating material () coating the top faces of the claddings (), and light receiving elements () for receiving lights emitted from the end faces of the cores ().

Growing community of inventors

Tokyo, Japan

Taro Kaneko