Abstract: An optical receiver module 1 includes : a sleeve that holds an optical fiber; an optical flat surface provided in the sleeve and into which light emitted from the optical fiber enters; a lens provided in the sleeve that converges and emits the light that has entered the optical flat surface; and a light-receiving element that receives the light emitted from the lens and converts optical Signals to electrical signals. The optical flat surface is formed such as to be tilted by 20° to 40° or 60° to 70° in relation to a light-receiving surface of the light-receiving element.

Abstract: A complete reflection surface is formed in a notched section. A transmittance surface, a transmittance surface, and a complete reflection surface are formed in a recess section. The complete reflection surface completely reflects each laser beam emitted from first lenses. The transmittance surface and the transmittance surface transmit the incident laser beam. The complete reflection surface completely reflects each laser beam emitted from third lenses. A main body of a lens array optically couples optical fibers and photoelectric conversion elements (light-emitting elements and light-receiving elements) without an optical path of the laser light and an optical path of the laser light intersecting.

Abstract: A lens array apparatus and a manufacturing method thereof are provided in which the lens array apparatus can achieve appropriate optical performance regardless of changes in ambient temperature. As a predetermined angle of gradient in relation to a thickness direction for each of a plurality of lenses 11, an exiting direction of light emitted from each lens 11 is at an angle of gradient allowing respective converging points of the light emitted from each lens 11 to be positioned on a predetermined straight line 23 that corresponds to each lens 11 and is parallel with the thickness direction, under a plurality of different ambient temperatures.

Abstract: An optical module including a cylindrical holder in an optical receptacle for optically connecting an optical fiber and an optical device, a ferrule that holds a tip end section of the optical fiber; and a holder that holds a base end section of the ferrule. The tip end section of the optical fiber and the ferrule are inserted into the cylindrical holder and held there within and a ring shaped spacer is provided that fills a gap between the cylindrical holder and the holder in a state in which the tip end section of the optical fiber and the ferrule are inserted into the cylindrical holder.

Abstract: A lens array apparatus and a manufacturing method thereof are provided in which the lens array apparatus can achieve appropriate optical performance regardless of changes in ambient temperature. As a predetermined angle of gradient in relation to a thickness direction for each of a plurality of lenses, an exiting direction of light emitted from each lens is at an angle of gradient allowing respective converging points of the light emitted from each lens to be positioned on a predetermined straight line that corresponds to each lens and is parallel with the thickness direction, under a plurality of different ambient temperatures.

Abstract: An optical module can reliably provide monitor light and can facilitate manufacturing by reducing the number of lens surfaces. Based on a surface shape of each first lens surface (14), the relationship in length between the optical path length of the second optical path and the optical path length of the first optical path after reflecting/transmission surface (17) and whether or not second lens surfaces are formed in second surface (4b) based on this relationship in length, the spot diameter of light of each light emitting element (7) to be coupled to the end surface of each optical fiber (3) is made narrower than a spot diameter of monitor light to be coupled to each light receiving element (8).

Abstract: An optical receptacle including a cylindrical sleeve formed using a material having higher elasticity than that of the optical receptacle main body. The sleeve is held within the sleeve holding section by being press-fitted and a sum of a press-fitted sleeve thickness and a press-fitted holding sleeve thickness in a radial direction is a predetermined value.

Abstract: An optical element including a transmitting surface section and at least one reflective surface section integrally formed on a main body of the optical element. The transmitting surface section refracts incident light emitted from a predetermined light-emitting position and transmits the light. The reflective surface section reflects the incident light emitted from the light-emitting position such that the light returns to a position differing from the light-emitting position. An optical axis of the transmitting surface section and an optical axis of the reflective surface section are out of alignment such as to be mutually parallel or mutually tilted.

Abstract: A lens array can have monitor light reliably and can be manufactured easily. With this lens array (2), a reflecting/transmission surface (15) of a first concave part (14) branches laser lights L having been emitted from light emitting elements (7) and having been incident on first lens surfaces (11), toward second lens surfaces (12) and third lens surfaces (13). Monitor lights M branched toward the third lens surfaces (13) are emitted from the third lens surfaces (13) toward first light receiving elements (8) passing through a refracting surface (19) of a second concave part (18). The lens array (2) is formed such that the optical axes on the first lens surfaces (11) and the optical axes on the third lens surfaces (13) are parallel, and the optical axes on the first lens surface (11) and the optical axes on the second lens surfaces (12) are parallel or vertical.

Abstract: It is to provide an optical element, an optical module, an optical connector, and an optical module manufacturing method that can quickly and very accurately control the amount of outgoing light to a desired amount when incident light is outputted, reduce costs, and enhance manufacturing efficiency. A diffraction grating 9 having a periodic structure made from a plurality of grating grooves 10 and formed to allow control of an amount of outgoing light using polarization-dependent characteristics when incident light is outputted as the outgoing light and a mark 11 indicating at least one of either a grating groove 10 direction of the diffraction grating 9 or a periodic direction of the diffraction grating 9 are included.

Abstract: It is to enhance mass-productivity through quick adhesion of an optical element 11 to an optical module holder 14 using an ultraviolet curable adhesive 7. When an optical element 11 is adhered to an optical element attaching section 5 by an ultraviolet curable adhesive 7 through ultraviolet rays being irradiated onto the ultraviolet curable adhesive 7 applied onto a predetermined application surface 5a on an inner circumferential surface of the optical element attaching section 5 from an outer side of the optical element attaching section 5, a thin-walled section 20 for maintaining a transmittance of the ultraviolet rays transmitted through the optical element attaching section 5 at a predetermined value or higher is formed on the optical element attaching section 5.

Abstract: An optical fiber holding structure is provided that can enhance wiggle characteristic. A spacer 18 is provided that fills a gap between a holder 2 and a holding member 12 in a state in which a tip end section of an optical fiber 10 and a ferrule 11 are inserted into the holder 2.

Abstract: An optical receptacle and a manufacturing method thereof are provided in which good wiggle characteristics can be actualized at a low cost and mass-productivity can be improved. A sleeve 3 is formed using a material having higher elasticity than that of an optical receptacle main body 2. The sleeve 3 is held within a sleeve holding section 5 by being press-fitted.

Abstract: An optically coupled device and an optical module including the optically coupled device are provided in which a photoelectric conversion device can be easily and appropriately positioned, and reduction in manufacturing costs and improvement in productivity can be achieved. A configuration is made in which, when a photoelectric conversion device 7 is attached to an optically coupled device 1, sufficient optical coupling efficiency can be achieved simply by a mechanical operation in which a photoelectric conversion device 7-side positioning mechanism 12 is engaged with an optically coupled device 1-side positioning mechanism 11, without requiring alignment in any of an emission or irradiation direction of light in a photoelectric conversion element 5 and a direction perpendicular thereto.

Abstract: An optical module capable of preventing the efficiency of optical coupling from deteriorating even if temperature varies. The optical module 1 has a holder 2 and an aspherical lens 11, which are formed of a plastic so as to be integrated with each other. The holder 2 has a cylindrical portion 8 which engages a photoelectric transfer element package 3. The photoelectric transfer element package 3 has a flange portion 15 which butts the open end face 16 of the cylindrical portion 8. The flange portion 15 is bonded to the open end face 16 of the cylindrical portion 16, and a gap is formed between the outer peripheral surface 18 of the cap 12 of the photoelectric transfer element package 3 and the inner peripheral surface of the cylindrical portion 8.

Abstract: A lens array apparatus and a manufacturing method thereof are provided in which the lens array apparatus can achieve appropriate optical performance regardless of changes in ambient temperature. As a predetermined angle of gradient in relation to a thickness direction for each of a plurality of lenses 11, an exiting direction of light emitted from each lens 11 is at an angle of gradient allowing respective converging points of the light emitted from each lens 11 to be positioned on a predetermined straight line 23 that corresponds to each lens 11 and is parallel with the thickness direction, under a plurality of different ambient temperatures.

Abstract: An optically coupled device and an optical module including the optically coupled device are provided in which a photoelectric conversion device can be easily and appropriately positioned, and reduction in manufacturing costs and improvement in productivity can be achieved. A configuration is made in which, when a photoelectric conversion device 7 is attached to an optically coupled device 1, sufficient optical coupling efficiency can be achieved simply by a mechanical operation in which a photoelectric conversion device 7-side positioning mechanism 12 is engaged with an optically coupled device 1-side positioning mechanism 11, without requiring alignment in any of an emission or irradiation direction of light in a photoelectric conversion element 5 and a direction perpendicular thereto.

Abstract: An optical element, an optical module holder including the optical element, an optical module, and an optical connector are provided that can suppress, at a low cost, a change in an intensity of a light that is emitted from a photoelectric conversion:element and coupled to an end section of an optical transmission path, the change accompanying a change in an usage environment temperature, perform a stable optical communication having a superior heat resistance property at a low cost, and can achieve size reduction and improved versatility. A diffraction grating 17 is formed to suppress, to within a predetermined allowable limit, a coupled light temperature characteristic indicating a change in an intensity of a light of a specific diffractive order that is coupled to an end section of an optical transmission line 12, the change accompanying a change in a usage environment temperature of a photoelectric converter 8.

Abstract: It is to enhance mass-productivity through quick adhesion of an optical element 11 to an optical module holder 14 using an ultraviolet curable adhesive 7. When an optical element 11 is adhered to an optical element attaching section 5 by an ultraviolet curable adhesive 7 through ultraviolet rays being irradiated onto the ultraviolet curable adhesive 7 applied onto a predetermined application surface 5a on an inner circumferential surface of the optical element attaching section 5 from an outer side of the optical element attaching section 5, a thin-walled section 20 for maintaining a transmittance of the ultraviolet rays transmitted through the optical element attaching section 5 at a predetermined value or higher is formed on the optical element attaching section 5.

Abstract: It is to provide an optical element, an optical module holder including the optical element, an optical module, and an optical connector that can support high-speed communication, achieve reductions in the number of components and cost, and enhance optical characteristics and manufacturability. A transmitting surface section 21 and at least one reflective surface section 22 are provided. The transmitting surface section 21 refracts incident light emitted from a predetermined light-emitting position and transmits the light. The reflective surface section 22 reflects the incident light emitted from the light-emitting position such that the light returns to a position differing from the light-emitting position. An optical axis of the transmitting surface section 21 and an optical axis of the reflective surface section 22 are out of alignment such as to be mutually parallel or mutually tilted.