Abstract: A package for optical module includes a flat-plate-shaped metal base, and a ceramic circuit board in which a plurality of terminals are arranged in a longitudinal direction, and which is joined to an upper surface of the metal base by soldering. The ceramic circuit board has a shape change portion in which the ceramic circuit board is changed in shape along the longitudinal direction, and a region of the ceramic circuit board not including the shape change portion is joined to the metal base by soldering. The shape change portion of the ceramic circuit board is a portion where a width is changed along the longitudinal direction, or a portion where a thickness is changed along the longitudinal direction.

Abstract: One side surface of a diffraction grating is securely held by a holder, and further, the holder is securely supported on a substrate by a supporter in such a manner that the diffraction grating held by the holder is not brought into contact with the substrate. In this manner, the diffraction grating is fixed only onto one side surface to the supporter via the holder, and further, the diffraction grating is not brought into contact with the substrate. Therefore, the lower portion of the supporter is displaced by heat generated in the substrate, however, the displacement of the supporter cannot adversely influence directly on the diffraction grating since the holder is interposed between the displaced portion and the diffraction grating.

Abstract: A lens holder includes a pair of leg members inclined and extending to a lens housing from a support member that supports the lens holder at a predetermined position. A distance between pair of leg members is set such that the distance between lower end portions is equal to or larger than a width of the lens housing to be supported, and the distance between upper end portions is equal to or smaller than the width of the lens housing to be supported, and that the distance becomes gradually smaller from the lower end portions to the upper end portions of the legs. A lens optical component includes a lens housing holding a lens, and the lens holder.

Abstract: A package for optical module includes a flat-plate-shaped metal base, and a ceramic circuit board in which a plurality of terminals are arranged in a longitudinal direction, and which is joined to an upper surface of the metal base by soldering. The ceramic circuit board has a shape change portion in which the ceramic circuit board is changed in shape along the longitudinal direction, and a region of the ceramic circuit board not including the shape change portion is joined to the metal base by soldering. The shape change portion of the ceramic circuit board is a portion where a width is changed along the longitudinal direction, or a portion where a thickness is changed along the longitudinal direction.

Abstract: A light-receiving package for flat-plate mounting which can make monitor reception sensitivity of an optical signal constant without increasing the size of a module.

Abstract: A method of manufacturing an optical module, comprising: mounting on a plane of a flat-plate-shaped base having a predetermined thickness: (a) an optical semiconductor package in which an active optical element is air-tightly sealed; (b) a waveguide optical element which wave-guides light from an optical fiber or to an optical fiber; and (c) an optical lens which connects the active optical element and the waveguide optical element; irradiating the plane with laser light at an angle close to horizontal to fix the optical lens using spot welding; covering the optical semiconductor package, the waveguide optical element, and the optical lens, with a frame-equipped lid having a bathtub shape; and fixing the frame-equipped lid onto the plane of the flat-plate-shaped base.

Abstract: A lens holder includes a pair of leg members inclined and extending to a lens housing from a support member that supports the lens holder at a predetermined position. A distance between pair of leg members is set such that the distance between lower end portions is equal to or larger than a width of the lens housing to be supported, and the distance between upper end portions is equal to or smaller than the width of the lens housing to be supported, and that the distance becomes gradually smaller from the lower end portions to the upper end portions of the legs. A lens optical component includes a lens housing holding a lens, and the lens holder.

Abstract: A low-cost optical module with highly consistent properties. The optical module includes, in a housing, an optical waveguide array, an optical functional element array, lens optics using one or a plurality of lenses for optically coupling the optical waveguide array and the optical functional element array, and a mirror disposed so as to convert the propagation direction of optical beams transmitted by the lens optics such that the optical beams are incident on the optical incidence ports of the optical functional element array. The optical functional element array is affixed to the housing, and the angle of the mirror is fixed in place after the angle of the mirror is adjusted such that the optical waveguide array and the optical functional element array are optically coupled.

Abstract: A light-receiving package for flat-plate mounting which can make monitor reception sensitivity of an optical signal constant without increasing the size of a module.

Abstract: An optical module for receiving light according to a digital coherent optical transmission scheme includes two optical fibers, and a monitor PD. The optical signal processing circuit includes a substrate, an optical waveguide layer made up of a core and a clad layer stacked on top of the substrate, and fixtures stacked on top of the clad layer on the one end, and is provided with a light shield member which spans the substrate, the clad layer, and the edge face of the fixture on the edge face of the optical signal processing circuit that faces the monitor PD, and which includes an aperture unit aligned with the given site where the diverted signal light is output.

Abstract: A light-shielding portion (10) shields the light spot of output light output toward a shunt position ? by a projecting portion (12). Hence, the output light output toward the shunt position ? does not travel to an output port (111). This allows to prevent crosstalk.

Abstract: An optical module for receiving light according to a digital coherent optical transmission scheme includes two optical fibers, and a monitor PD. The optical signal processing circuit includes a substrate, an optical waveguide layer made up of a core and a clad layer stacked on top of the substrate, and fixtures stacked on top of the clad layer on the one end, and is provided with a light shield member which spans the substrate, the clad layer, and the edge face of the fixture on the edge face of the optical signal processing circuit that faces the monitor PD, and which includes an aperture unit aligned with the given site where the diverted signal light is output.

Abstract: A low-cost optical module with highly consistent properties. The optical module includes, in a housing, an optical waveguide array, an optical functional element array, lens optics using one or a plurality of lenses for optically coupling the optical waveguide array and the optical functional element array, and a mirror disposed so as to convert the propagation direction of optical beams transmitted by the lens optics such that the optical beams are incident on the optical incidence ports of the optical functional element array. The optical functional element array is affixed to the housing, and the angle of the mirror is fixed in place after the angle of the mirror is adjusted such that the optical waveguide array and the optical functional element array are optically coupled.

Abstract: A wavelength selection switch that includes an optical component for adjusting an optical path with an image magnification of M that is provided between a second imaging position and a mirror array. Therefore, it is possible to provide a small wavelength selection optical switch with a short optical path length that is capable of reducing the focal length of each of a first lens and a second lens to 1/M while maintaining the structure of the spectral element, the fiber array, and the mirror array according to the related art. Since the optical path length is reduced, it is possible to reduce the number of reflecting mirrors used to convert an optical path and thus reduce the size of a housing. Therefore, it is possible to reduce manufacturing costs.

Abstract: An optical module including a flat-plate-shaped base having a predetermined thickness, an optical semiconductor package which is mounted on a plane of the flat-plate-shaped base to air-tightly seal an active optical element, a waveguide optical element which wave-guides light from an optical fiber or to an optical fiber and which is mounted on the plane of the flat-plate-shaped base, an optical lens which connects the optical semiconductor package and the waveguide optical element and which is mounted on the plane of the flat-plate-shaped base, and a frame-equipped lid which covers the optical semiconductor package, the waveguide optical element, and the optical lens and which is fixed onto the plane of the flat-plate-shaped base.

Abstract: A light-shielding portion (10) shields the light spot of output light output toward a shunt position ? by a projecting portion (12). Hence, the output light output toward the shunt position ? does not travel to an output port (111). This allows to prevent crosstalk.

Abstract: An optical semiconductor module in which displacement resulting from fixation of lenses is effectively corrected includes a first lens (102), a second lens (103), and a third lens (104) arranged between a semiconductor laser (101) and a semiconductor optical modulator (105). The first lens (102) and the second lens (103) form a collimate lens optical system. The first lens (102) converts light emitted by the semiconductor laser (101) into parallel light rays. The second lens (103) focuses the parallel light rays on the semiconductor optical modulator (105) to couple the light rays to the semiconductor optical modulator (105). The third lens (104) has a longer focal distance than the first and second lenses. Thus, displacement of the lenses resulting from fixation thereof can be corrected by adjusting in position and fixing the first and second lenses (102, 103) and then adjusting in position and fixing the third lens.

Abstract: An object of the present invention is to provide a peptide vaccine for preventing and/or treating diseases caused by amyloid ?-peptide, such as Alzheimer's disease. The present invention solves the above object by providing a peptide vaccine constructed by inserting a peptide having an amino acid sequence of a cell attachment motif of a cell adhesive molecule to a peptide which consists of a peptide having an amino acid sequence of multiagretope type T-cell epitope, which has been generated immunological memory, or a peptide including the same; an linker peptide; and a peptide having an amino acid sequence of a B cell epitope which is a specific region of amyloid ?-peptide or a peptide including the same.

Abstract: One side surface of a diffraction grating is securely held by a holder, and further, the holder is securely supported on a substrate by a supporter in such a manner that the diffraction grating held by the holder is not brought into contact with the substrate. In this manner, the diffraction grating is fixed only onto one side surface to the supporter via the holder, and further, the diffraction grating is not brought into contact with the substrate. Therefore, the lower portion of the supporter is displaced by heat generated in the substrate, however, the displacement of the supporter cannot adversely influence directly on the diffraction grating since the holder is interposed between the displaced portion and the diffraction grating.

Abstract: A wavelength selection switch that includes an optical component for adjusting an optical path with an image magnification of M that is provided between a second imaging position and a mirror array. Therefore, it is possible to provide a small wavelength selection optical switch with a short optical path length that is capable of reducing the focal length of each of a first lens and a second lens to 1/M while maintaining the structure of the spectral element, the fiber array, and the mirror array according to the related art. Since the optical path length is reduced, it is possible to reduce the number of reflecting mirrors used to convert an optical path and thus reduce the size of a housing. Therefore, it is possible to reduce manufacturing costs.