Abstract: The optical module includes a main housing, a filter support component, which can affix an optical fiber, supported by a first attachment section, a light-emitting component supported by a second attachment section, a light-receiving component supported by a third attachment section, and first and second optical filters supported by a filter support component. The filter support component has a first surface and a second surface. The first optical filter is mounted on the first surface of the filter support component. The second optical filter is mounted on the second surface of the filter support component.

Abstract: The present invention relates to an optical module which can be produced by an easy process and at low cost and a method for fabricating the optical module. An optical module 100 includes a die pad 101, a plurality of leads 102, and a first platform 110 and a second platform 120 disposed on the die pad 101. At least an optical fiber 113 is fixed to a first platform body 111 and at least a light emitter 124 adapted for generating optical signals to be transmitted through the optical fiber 113 is mounted on a second platform body 121.

Abstract: The optical module includes a main housing, a light-emitting component supported by a second attachment section, a light-receiving component and a filter support member supported by a third attachment section, and first and second optical filters supported by the filter support member. The filter support member has a first surface and a second surface. The first optical filter is mounted on the first surface of the filter support member. The second optical filter is mounted on the second surface of the filter support member.

Abstract: The present invention is to provide an arrayed waveguide-embedded optical circuit with reduced loss at a groove and an optical functional element using for the arrayed waveguide-embedded optical circuit. The arrayed waveguide-embedded optical circuit according to the present invention comprises a waveguide, a groove formed across the waveguide and two or more spot-size transformer pairs whose members face each other across the groove.

Abstract: The optical module includes a main housing to which the optical fiber can be attached and a light-emitting component and a light-receiving component attached to the main housing. At least a part of a surface of the main housing has an irregular pattern to enhance a thermal dissipation. Because at least part of the main housing comprises a heat sink, so the optical module itself has a very high heat dissipation property, eliminating the type of problems that arise when adhesive or the like is used to attach to the main housing heat sinks constituted as separate parts, such as the increase in the number of parts and the degradation in thermal conductivity to the heat sink caused by the adhesive.

Abstract: The optical module includes a main housing to which the optical fiber can be attached and a light-emitting component and a light-receiving component attached to the main housing. At least a part of a surface of the main housing has an irregular pattern to enhance a thermal dissipation. Because at least part of the main housing comprises a heat sink, so the optical module itself has a very high heat dissipation property, eliminating the type of problems that arise when adhesive or the like is used to attach to the main housing heat sinks constituted as separate parts, such as the increase in the number of parts and the degradation in thermal conductivity to the heat sink caused by the adhesive.

Abstract: The optical module includes a main housing, a filter support component, which can affix an optical fiber, supported by a first attachment section, a light-emitting component supported by a second attachment section, a light-receiving component supported by a third attachment section, and first and second optical filters supported by a filter support component. The filter support component has a first surface and a second surface. The first optical filter is mounted on the first surface of the filter support component. The second optical filter is mounted on the second surface of the filter support component.

Abstract: The optical module includes a main housing, a light-emitting component supported by a second attachment section, a light-receiving component and a filter support member supported by a third attachment section, and first and second optical filters supported by the filter support member. The filter support member has a first surface and a second surface. The first optical filter is mounted on the first surface of the filter support member. The second optical filter is mounted on the second surface of the filter support member.

Abstract: The optical branching device includes an input optical waveguide for outputting light inputted from a light input end face to a light output end face, a tapered optical waveguide having one end face connected to the light output end face and a width expanding at a predetermined angle, and branching optical waveguides connected to the other end face of the tapered optical waveguide at a predetermined branching angle, in which when a propagation constant of a leaky mode is ?L, a propagation constant of a fundamental mode is ?0, a meander period is ?, and ?=2?/(?0-?L), an optical waveguide length L from a position which becomes a cause of the leaky mode to the light output end face is substantially integer times ?/2.

Abstract: An optical waveguide is formed on a substrate 11 by the steps of (1) forming an lower clad layer 12, core layer 13, metal mask layer 14 and a photoresist layer 15, (2) patterning the photoresist layer 15 by using a photomask 16, (3) etching and patterning the metal mask layer 14 wider than a core of required width using the patterned photoresist layer 15, (4) removing the photoresist layer and the metal mask layer 14 after patterning the core layer 13 by using the patterned metal mask layer 14 to form core 13a, (5) forming an upper clad layer 17 on the lower clad layer 12 so as to bury the patterned core 13a.

Abstract: The present invention is to provide an arrayed waveguide-embedded optical circuit with reduced loss at a groove and an optical functional element using for the arrayed waveguide-embedded optical circuit.

Abstract: The present invention realizes miniaturization, low cost and improvement of fabricating efficiency of an optical module.

Abstract: The present invention realizes easy packaging of an optical module without using a molding machine and metal mold.

Abstract: The invention relates to an optical branching device connected to a light output end face of an optical waveguide device or an optical branching device and for branching input light, and has an object to provide the optical branching device in which optical axis alignment is easy and the lowering of yield is suppressed.

Abstract: An optical waveguide module-mounted device that includes an optical waveguide module in a separation type case. The module includes an optical waveguide chip and a pair of optical fibers connected to the optical waveguide chip. The fibers are connected such that the optical axes of the chip and the fibers are aligned with each other. The separation type case has an optical-fiber lead-in portion and an optical-fiber lead-in groove. The optical-fiber lead-in portion has an optical-fiber open groove at open portion of the separation type case. The optical-fiber open groove leads the optical fiber out of the separation type case. The optical-fiber lead-in groove positions the optical fiber and is connected to the inner end of the open groove. The optical-fiber open groove is deeper than the optical-fiber lead-in groove.

Abstract: An optical waveguide module-mounted package that includes an optical waveguide module in a separation type case. The module includes an optical waveguide chip and a pair of optical fibers, connected to said optical waveguide chip in the manner that the optical axes of said fibers and the chip are aligned with each other. The separation type case is formed by combining two identical half cases. Each half case has a mating surface with one or more recess-protrusion pairs for fitting. The recess and the protrusion the respective protrusion and recess of the combining partner.

Abstract: The object is to solve the problem in bending strength of an optical fiber, in an optical waveguide module-mounted device using an integrated separation type case. An optical waveguide module-mounted device containing an optical waveguide module in a separation type case, the module comprising an optical waveguide chip and a pair of optical fibers connected to the optical waveguide chip in the manner that the optical axes of the chip and the fibers are aligned with each other, wherein the separation type case has an optical-fiber lead-in portion, the optical-fiber lead-in portion having: an optical-fiber open groove at open portion, for leading the optical fiber out of the separation type case; and an optical-fiber lead-in groove for positioning the optical fiber, which groove is connected to the inner end of the open groove, the open groove being deeper than the optical-fiber lead-in groove .

Abstract: To provide an optical waveguide module-mounted package having a structure that allows the package to be assembled easily. An optical waveguide module-mounted package containing an optical waveguide module in a separation type case, which module comprising an optical waveguide chip and a pair of optical fibers, connected to said optical waveguide chip in the manner that the optical axes of said fibers and the chip are aligned with each other, wherein said separation type case is formed by combining two identical half cases, each half case being provided with a mating surface having one or more recess-protrusion pairs for fitting, said recess and said protrusion fitting respectively the protrusion and the recess of the combining partner.

Abstract: A method of manufacturing a polarizing plate of a resonance absorption effect type wherein plural bar-like polarizing members are arranged in a light-transmittable polarizing matrix layer with major axes thereof orienting in a constant direction. The method includes a preparing process of a forming die for preparing a forming die having a concavoconvex pattern corresponding to a layout pattern of the bar-like polarizing members, a forming process of a concavoconvex pattern on a resin layer for forming a resin layer directly or indirectly on a substrate and pressing the forming die onto the resin layer so as to form a concavoconvex pattern on the resin layer, a forming process of bar-like polarizing members for forming the bar-like polarizing members in the foregoing layout pattern using the concavoconvex pattern of the resin layer, and a forming process of a polarizing matrix layer for forming the light-transmittable polarizing matrix layer so as to bury the formed bar-like polarizing members.

Abstract: A polarizing plate includes a polarizing layer for controlling a light and producing a polarized light, the polarizing layer having a particle dispersing medium with a property of light transmission and bar-like polarizing particles which are dispersed in the particle dispersing medium and arranged in a constant direction with a magnetic field, where each of the bar-like polarizing particles is provided with a bar-like ferromagnetic particle of chromium dioxide, whose surface is coated with a conductive film.