Abstract: An optical apparatus includes a light emitting apparatus and a host apparatus. The light emitting apparatus includes a housing extending in a first direction, a light emitting device mounted in the housing, an optical connector including a first optical connection part provided at one end of the housing, and an electrical connector including a first electrical connection part provided at one end of the housing and receiving a voltage to drive the light emitting device. The host apparatus includes a host optical connector including a second optical connection part which faces the first optical connection part and is optically coupled thereto, a host electrical connector including a second electrical connection part facing the first electrical connection part and being electrically connected to the first electrical connection part, and a host board mounting the host optical connector and the host electrical connector thereon.

Abstract: A ferrule according to an embodiment is a ferrule of an optical connector to which a counterpart connector is connected. The ferrule includes an end portion having an optical fiber retention hole and a guide hole opened, the optical fiber retention hole into and on which a fiber is inserted and retained, the guide hole into which a guide pin is inserted, the guide pin establishing positioning to the counterpart connector. The end portion includes an optical surface including an opening of the optical fiber retention hole, a guide hole exposure surface including an opening of the guide hole, and a step part formed between the optical surface and the guide hole exposure surface.

Abstract: An optical fiber connection component is provided with: a glass plate that has a plurality of first through-holes; a resin ferule that has a plurality of second through-holes respectively coaxial to the first through-holes and that is fixed to the glass plate; and a plurality of optical fibers that is arranged on a surface of the resin ferrule. One or more glass fibers disposed within each of the plurality of optical fibers, a surface of each of the glass fibers being covered with a resin coating, and a portion of each of the glass fibers being exposed from a tip of each of the optical fibers. The exposed portion of each of the glass fibers is held in a corresponding one of the first through-holes and a corresponding one of the second through-holes.

Abstract: The optical connection structure includes: optical fibers disposed such that end faces are arranged in a first direction; an optical functional component having a first surface facing the end faces of the optical fibers; a holding member having a second surface facing the first surface and directly or indirectly fixed to the first surface, a third surface facing away from the second surface, and a fiber holding holes extending from the third surface toward the second surface and respectively accommodating the optical fibers; and a distortion suppression member having a fourth surface facing the third surface and directly or indirectly fixed to the third surface and sandwiching the holding member with the optical functional component. Thermal expansion coefficients of the optical functional component and the distortion suppression member are higher or lower than a thermal expansion coefficient of the holding member.

Abstract: An optical apparatus includes a package, a board, a plurality of first optical cables, and a first optical connector. The package includes an integrated circuit and an optical device that converts an electrical signal from the integrated circuit into an optical signal. The board includes a main surface, and the package is disposed on the main surface. Each of the plurality of first optical cables includes a plurality of optical fibers. Each of the plurality of first optical cables includes a first end portion and a second end portion on a side opposite thereto. Each of a plurality of the first end portions is optically coupled to the optical device, and each of a plurality of the second end portions is attached to the first optical connector. The first optical connector is disposed on the main surface of the board to be entirely located inside an edge of the board.

Abstract: An optical connector jig for connecting a second optical connector to a first optical connector, or disconnecting the second optical connector from the first optical connector, includes a first housing and a second housing. The first housing includes a positioning portion to determine a position of the jig with respect to the first optical connector in cooperation with a member indicating a position of the first optical connector. The second housing grips the second optical connector such that, when the jig is positioned with respect to the first optical connector, a connection surface of the second optical connector faces a connection surface of the first optical connector. The second housing moves with respect to the first housing such that the connection surface of the gripped second optical connector is close to or away from the connection surface of the first optical connector.

Abstract: An optical fiber connecting component includes a glass plate having a plurality of first through holes, a resin ferrule fixed to the glass plate and having a plurality of second through holes that are each coaxial with corresponding one of the plurality of first through holes, and a plurality of optical fibers including a glass fiber and a resin coating that covers the glass fiber. The glass fiber exposed from a tip of each of the optical fibers is held in corresponding one of the first through holes and corresponding one of the second through holes, and a material for the resin ferrule has a flexural modulus of 5 GPa or more at 200° C.

Abstract: A manufacturing method for manufacturing a multi-fiber connector, including: shaping a part of each of a plurality of optical fibers such that a part of an outer peripheral surface of a glass fiber including one end portion becomes a flat surface; arranging each of the plurality of optical fibers in a positioning component such that the entire flat surface protrudes from the positioning component; rotationally aligning each of the plurality of optical fibers such that the flat surface comes into contact with a reference surface of a jig; fixing each of the plurality of optical fibers to the positioning component; and cutting and removing a part of the glass fiber which protrudes from the positioning component and includes the flat surface and grinding a cut surface of each of the plurality of optical fibers which is exposed from the positioning component.

Abstract: An optical fiber connecting component includes a glass plate having a plurality of first through holes, a resin ferrule fixed to the glass plate and having a plurality of second through holes that are each coaxial with corresponding one of the plurality of first through holes, and a plurality of optical fibers including a glass fiber and a resin coating that covers the glass fiber. The glass fiber exposed from a tip of each of the optical fibers is held in corresponding one of the first through holes and corresponding one of the second through holes, and a material for the resin ferrule has a flexural modulus of 5 GPa or more at 200° C.

Abstract: An optical connecting structure for connecting multi-core fibers is disclosed. The optical connecting structure includes first multi-core fibers of which each optical fiber includes cores, second multi-core fibers of which each optical fiber includes cores, a first optical system which allows at least a part of light beams emitted from the cores of each first multi-core fiber to have different propagation directions, and a second optical system which allows each light beam emitted from each first multi-core fiber and propagated through the first optical system to be condensed on the plurality of second multi-core fibers. A first fiber array where the first multi-core fibers are arrayed in a first surface intersecting an optical axis of the first optical system corresponds to a first core array where the cores in the respective optical fibers of the first multi-core fibers are arrayed in the first surface.

Abstract: A ferrule according to an embodiment is a ferrule of an optical connector to which a counterpart connector is connected. The ferrule includes an end portion having an optical fiber retention hole and a guide hole opened, the optical fiber retention hole into and on which a fiber is inserted and retained, the guide hole into which a guide pin is inserted, the guide pin establishing positioning to the counterpart connector. The end portion includes an optical surface including an opening of the optical fiber retention hole, a guide hole exposure surface including an opening of the guide hole, and a step part formed between the optical surface and the guide hole exposure surface.

Abstract: A manufacturing method for manufacturing a multi-fiber connector, including: shaping a part of each of a plurality of optical fibers such that a part of an outer peripheral surface of a glass fiber including one end portion becomes a flat surface; arranging each of the plurality of optical fibers in a positioning component such that the entire flat surface protrudes from the positioning component; rotationally aligning each of the plurality of optical fibers such that the flat surface comes into contact with a reference surface of a jig; fixing each of the plurality of optical fibers to the positioning component; and cutting and removing a part of the glass fiber which protrudes from the positioning component and includes the flat surface and grinding a cut surface of each of the plurality of optical fibers which is exposed from the positioning component.

Abstract: An optical connector ferrule according to an embodiment includes an MT ferrule, and a spacer mounted on an optical end surface of the MT ferrule and having a guide hole into which a guide pin is inserted. The spacer has a contact surface that contacting the counterpart connector and a recess surrounded by the contact surface. The spacer includes a lens part exposed on a bottom surface of the recess and optically coupled to the optical end surface of the MT ferrule and a base part that retains the lens part by surrounding the lens part. The material of the lens part and the material of the base part are different from each other, and the difference between the linear expansion coefficient of the base part and the linear expansion coefficient of the MT ferrule is 0.5×10?5/° C. or less.

Abstract: An optical connection structure including N first inner housings, a first outer housing, N second inner housings, and a second outer housing. The respective first inner housings hold M first ferrules. The first outer housing holds the first inner housings in an arranged state. The respective second inner housings hold M second ferrules. The second outer housing holds the second inner housings in an arranged state. The optical connection structure includes a first latch mechanism that restrict a movement of the first inner housing relative to the first outer housing in a pullout direction, a second latch mechanism that couples the first inner housing and the second inner housing to each other, and a latch releasing mechanism that releases the first latch mechanism in a state where the first inner housing and the second inner housing are coupled to each other by the second latch mechanism.

Abstract: An optical connecting structure for connecting multi-core fibers is disclosed. The optical connecting structure includes first multi-core fibers of which each optical fiber includes cores, second multi-core fibers of which each optical fiber includes cores, a first optical system which allows at least a part of light beams emitted from the cores of each first multi-core fiber to have different propagation directions, and a second optical system which allows each light beam emitted from each first multi-core fiber and propagated through the first optical system to be condensed on the plurality of second multi-core fibers. A first fiber array where the first multi-core fibers are arrayed in a first surface intersecting an optical axis of the first optical system corresponds to a first core array where the cores in the respective optical fibers of the first multi-core fibers are arrayed in the first surface.

Abstract: An optical connection structure including N first inner housings, a first outer housing, N second inner housings, and a second outer housing. The respective first inner housings hold M first ferrules. The first outer housing holds the first inner housings in an arranged state. The respective second inner housings hold M second ferrules. The second outer housing holds the second inner housings in an arranged state. The optical connection structure includes a first latch mechanism that restrict a movement of the first inner housing relative to the first outer housing in a pullout direction, a second latch mechanism that couples the first inner housing and the second inner housing to each other, and a latch releasing mechanism that releases the first latch mechanism in a state where the first inner housing and the second inner housing are coupled to each other by the second latch mechanism.

Abstract: An optical connector ferrule according to an embodiment includes an MT ferrule, and a spacer mounted on an optical end surface of the MT ferrule and having a guide hole into which a guide pin is inserted. The spacer has a contact surface that contacting the counterpart connector and a recess surrounded by the contact surface. The spacer includes a lens part exposed on a bottom surface of the recess and optically coupled to the optical end surface of the MT ferrule and a base part that retains the lens part by surrounding the lens part. The material of the lens part and the material of the base part are different from each other, and the difference between the linear expansion coefficient of the base part and the linear expansion coefficient of the MT ferrule is 0.5×10?5/° C. or less.

Abstract: An optical connector is disclosed. The optical connector includes an optical fiber, a ferrule that holds the optical fiber, the ferrule having a flat ferrule end surface facing a counterpart optical connector, and a spacer provided on the ferrule end surface so as to define a clearance between the ferrule end surface and the counterpart optical connector. A tip surface of the optical fiber is exposed at the ferrule end surface. Respective normal directions to the tip surface of the optical fiber and the ferrule end surface are inclined with respect to an optical-axis direction of the optical fiber in a section along an optical axis of the optical fiber. The spacer includes an opening configured to allow an optical path extending from the tip surface of the optical fiber to pass therethrough.

Abstract: A receptacle connector comprises a receptacle ferrule, and a receptacle housing including a cavity housing the receptacle ferrule and a cavity housing a plug connector. The receptacle ferrule includes an optical coupling surface (front surface). An opening area of the cavity on a cross section vertical to an inserting direction of the plug connector to the receptacle housing is smaller than an opening area of the cavity on the cross section vertical to the inserting direction. In a second state after being optically coupled, the optical coupling surface (front surface) is positioned inside the cavity.

Abstract: An optical connector is disclosed. The optical connector includes an optical fiber, a ferrule that holds the optical fiber, the ferrule having a flat ferrule end surface facing a counterpart optical connector, and a spacer provided on the ferrule end surface so as to define a clearance between the ferrule end surface and the counterpart optical connector. A tip surface of the optical fiber is exposed at the ferrule end surface. Respective normal directions to the tip surface of the optical fiber and the ferrule end surface are inclined with respect to an optical-axis direction of the optical fiber in a section along an optical axis of the optical fiber. The spacer includes an opening configured to allow an optical path extending from the tip surface of the optical fiber to pass therethrough.