Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: An optical waveguide device according to the invention is provided with a substrate (271), a metal layer (272) arranged on the substrate (271), a plurality of claddings (262) arranged on the metal layer (207) via grooves (205), cores (202) arranged in the claddings (262) for transmitting lights, optical waveguides (201) having optically non-transmissive material (291) coating the insides of the grooves (205) and optically non-transmissive and electrically insulating material (273) coating the top faces of the claddings (262), and light receiving elements (203) for receiving lights emitted from the end faces of the cores (202). In an optical waveguide device according to the invention, dents (204) in which the end faces of the cores are exposed (202) may be formed, the inside faces of the dents (204) being coated with optically non-transmissive material except where the end faces of the cores are exposed.

Abstract: An optical waveguide device according to the invention is provided with a substrate (271), a metal layer (272) arranged on the substrate (271), a plurality of claddings (262) arranged on the metal layer (207) via grooves (205), cores (202) arranged in the claddings (262) for transmitting lights, optical waveguides (201) having optically non-transmissive material (291) coating the insides of the grooves (205) and optically non-transmissive and electrically insulating material (273) coating the top faces of the claddings (262), and light receiving elements (203) for receiving lights emitted from the end faces of the cores (202). In an optical waveguide device according to the invention, dents (204) in which the end faces of the cores are exposed (202) may be formed, the inside faces of the dents (204) being coated with optically non-transmissive material except where the end faces of the cores are exposed.

Abstract: An optical waveguide device according to the invention is provided with a substrate (271), a metal layer (272) arranged on the substrate (271), a plurality of claddings (262) arranged on the metal layer (207) via grooves (205), cores (202) arranged in the claddings (262) for transmitting lights, optical waveguides (201) having optically non-transmissive material (291) coating the insides of the grooves (205) and optically non-transmissive and electrically insulating material (273) coating the top faces of the claddings (262), and light receiving elements (203) for receiving lights emitted from the end faces of the cores (202).

Abstract: 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.

Abstract: 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.

Abstract: Optical waveguide device 101 has waveguide 103 strip-shaped in the depth direction of the drawing and protruding from peripheral portion 102. A core (not illustrated) is disposed inside waveguide 103. Wall 106 to be cut is integrated with waveguide 103 to form one core layer. No unevenness occurs in a cutting line of wall 106 indicated with broken line 105. Accordingly, high-precision cutting is enabled by cutting wall 106 along the cutting line.

Abstract: An optical waveguide device according to the invention is provided with a substrate (271), a metal layer (272) arranged on the substrate (271), a plurality of claddings (262) arranged on the metal layer (207) via grooves (205), cores (202) arranged in the claddings (262) for transmitting lights, optical waveguides (201) having optically non-transmissive material (291) coating the insides of the grooves (205) and optically non-transmissive and electrically insulating material (273) coating the top faces of the claddings (262), and light receiving elements (203) for receiving lights emitted from the end faces of the cores (202). In an optical waveguide device according to the invention, dents (204) in which the end faces of the cores are exposed (202) may be formed, the inside faces of the dents (204) being coated with optically non-transmissive material except where the end faces of the cores are exposed.

Abstract: Optical waveguide device 101 has waveguide 103 strip-shaped in the depth direction of the drawing and protruding from peripheral portion 102. A core (not illustrated) is disposed inside waveguide 103. Wall 106 to be cut is integrated with waveguide 103 to form one core layer. No unevenness occurs in a cutting line of wall 106 indicated with broken line 105. Accordingly, high-precision cutting is enabled by cutting wall 106 along the cutting line.