An optical cable laying construction set (X) that includes an optical cable (C1) and plugs (P1 and P2). The optical cable (C1) includes an optical fiber which is a refractive index distribution-type plastic optical fiber. The plug (P1) includes a connecting portion connectable to the optical fiber, and an electric connector connectable to an external device, and has a configuration for converting an electric signal into an optical signal. The plug (P2) includes a connecting portion connectable to the optical fiber, and an electric connector connectable to an external device, and has a configuration for converting an optical signal to an electric signal. In an optical cable laying construction method of the present invention, laying construction of the optical cable on site is carried out using the optical cable laying construction set (X).

There is provided a light emitting element and an optical waveguide that propagates light from the light emitting element. For example, the optical waveguide is an optical fiber or a silicon optical waveguide. The light propagating through the optical waveguide is light having components of a fundamental mode and a first order mode, and the light propagates through the optical waveguide while having a light intensity distribution in which high intensity portions alternately appear in one direction and another direction opposite to the one direction with respect to the center of a core along the optical waveguide. A light intensity distribution at an output end surface of the optical waveguide is a light intensity distribution corresponding to an intermediate position between a first position where the high intensity portion is in the one direction and a second position where the high intensity portion is in the another direction. In a case of propagating the light having the components of the fundamental mode and the first order mode, it is possible to obtain favorable coupling efficiency regardless of a direction of an optical axis deviation, as in a case of propagating light having only the component of the fundamental mode. A cost is thus reduced by reducing accuracy of positional deviation.

There is provided a light emitting element and an optical waveguide that propagates light from the light emitting element. For example, the optical waveguide is an optical fiber or a silicon optical waveguide. The light propagating through the optical waveguide is light having components of a fundamental mode and a first order mode, and the light propagates through the optical waveguide while having a light intensity distribution in which high intensity portions alternately appear in one direction and another direction opposite to the one direction with respect to the center of a core along the optical waveguide. A light intensity distribution at an output end surface of the optical waveguide is a light intensity distribution corresponding to an intermediate position between a first position where the high intensity portion is in the one direction and a second position where the high intensity portion is in the another direction. In a case of propagating the light having the components of the fundamental mode and the first order mode, it is possible to obtain favorable coupling efficiency regardless of a direction of an optical axis deviation, as in a case of propagating light having only the component of the fundamental mode. A cost is thus reduced by reducing accuracy of positional deviation.

A stripping tool configured to sequentially strip the layers of a cable, such as a fiber optic cable. The stripping tool includes multiple channels, each with a distinct role in stripping a layer of the fiber optic tool. The user sequentially moves the cable from channel-to-channel while operating the tool. At the conclusion of these operations the cable is appropriately stripped and ready for a subsequent operation.

A stripping tool configured to sequentially strip the layers of a cable, such as a fiber optic cable. The stripping tool includes multiple channels, each with a distinct role in stripping a layer of the fiber optic tool. The user sequentially moves the cable from channel-to-channel while operating the tool. At the conclusion of these operations the cable is appropriately stripped and ready for a subsequent operation.

The present disclosure relates to various types of optical fibers that are spliced together with a splice protector provided to house the spliced optical fibers. The splice protector has dimensions that enable improved mechanical properties of the spliced optical fiber.

The present disclosure relates to various types of optical fibers that are spliced together with a splice protector provided to house the spliced optical fibers. The splice protector has dimensions that enable improved mechanical properties of the spliced optical fiber.

A method of exposing a core of an optical fiber cable that includes: a core including an optical fiber; a wrapping tube wrapping the core; a jacket housing the core and the wrapping tube; and a tension-resisting member of a Fiber Reinforced Plastic (FRP) embedded in the jacket, includes: making a cut in a circumferential direction in the jacket at a position closer to a first end portion of the optical fiber cable than to a second end portion of the optical fiber cable in a longitudinal direction; bending the optical fiber cable at a portion having the cut and fracturing the tension-resisting member; and removing a removal portion of the jacket that is disposed between the cut and the first end portion.

A method of exposing a core of an optical fiber cable that includes: a core including an optical fiber; a wrapping tube wrapping the core; a jacket housing the core and the wrapping tube; and a tension-resisting member of a Fiber Reinforced Plastic (FRP) embedded in the jacket, includes: making a cut in a circumferential direction in the jacket at a position closer to a first end portion of the optical fiber cable than to a second end portion of the optical fiber cable in a longitudinal direction; bending the optical fiber cable at a portion having the cut and fracturing the tension-resisting member; and removing a removal portion of the jacket that is disposed between the cut and the first end portion.

A method of optimizing the coupling to an optical fiber, including: generating a femtosecond laser pulse; directing a focus of the laser pulse to a longitudinal depth in the region beneath the endface of the optical fiber to generate microvoids; adjusting the intensity of the laser pulse at different depths, such that a refractive index profile is created in the region beneath the endface of the optical fiber.