Abstract: The present invention includes a memory and a processor configured to store, in a storage, a first digital twin in which at least one model defining at least one function of an entity at a given time, and at least one piece of second data that includes, as a constituent element, first data for realizing the function of the entity due to being input to the model are included, create at least one second digital twin by performing predetermined first computation using, as a computation target, at least one first digital twin stored in the storage, and execute computation for arranging the second digital twin in a sandbox for which a predetermined time axis has been set, and realizing a function of an entity indicated by the second digital twin in the sandbox in accordance with the time axis.

Abstract: A sensor device according to an embodiment of the present technology includes a sensor head and a measurement unit. The sensor head includes a first probe and a second probe, the first probe including a first antenna section used for transmission, the second probe including a second antenna section used for reception, the second probe being situated at a specified distance from the first probe and facing the first probe. The measurement unit includes a signal generator that generates a measurement signal that includes information regarding characteristics of a propagation of an electromagnetic wave in a medium between the first and second antenna sections.

Abstract: An object of the present invention is to enable identification of a reflection signal from a terminal portion of an optical fiber to be measured where a reflection signal caused by multiple reflection appears in an OTDR waveform in a mode in which an OTDR and the optical fiber to be measured are connected at a bent portion. The reflection signal caused by multiple reflection inevitably propagates through a distance equal to a distance between true reflection points more than the other reflection point, because of multiple reflection. Therefore, a distance between the reflection signal and another reflection signal is inevitably coincident with a distance between the other reflection signals. In contrast, in a case of a reflection signal from a terminal portion of the optical fiber, the distance between the reflection signal and another reflection signal is not coincident with the distance between the other reflection signals.

Abstract: The present disclosure relates to a vibration measuring instrument that repeatedly injects a plurality of light pulses with different optical frequencies into an optical fiber, and performs distributed acoustic sensing-phase (DAS-P). In the vibration measuring instrument, light pulses having a waveform with a spectral side lobe smaller than a side lobe of a rectangular wave are used as the plurality of light pulses.

Abstract: An object of the present invention is to provide, in a local-light coupling technique for improving efficiency of work, an optical fiber local-light coupling apparatus configured to hardly affect communication between an OLT and an ONU while causing light to leak from a coated optical fiber in such an amount that makes it possible to confirm a communication state.

Abstract: A sensor device according to an embodiment of the present technology includes a sensor head and a measurement unit. The sensor head includes a first probe and a second probe, the first probe including a first antenna section used for transmission, the second probe including a second antenna section used for reception, the second probe being situated at a specified distance from the first probe and facing the first probe. The measurement unit includes a signal generator that generates a measurement signal that includes information regarding characteristics of a propagation of an electromagnetic wave in a medium between the first and second antenna sections.

Abstract: An object is to provide a determination device that determines a state of a terminal end portion of a coated optical fiber at any location of the coated optical fiber. Reflection of test light varies in a reflection amount at each wavelength depending on a situation of the terminal end portion of the coated optical fiber. In other words, if the magnitude of the reflection amount at each wavelength can be known, the situation of the terminal end portion of the coated optical fiber can be estimated. The determination device according to the present invention is configured to make test light having a plurality of wavelengths incident from the optical fiber side and determine the test light based on a light intensity ratio of each reflected light beams reflected at the terminal end. In addition, reflection of test light varies in return loss at each wavelength depending on a situation of the terminal end portion of the coated optical fiber.

Abstract: A heat exchange core according to one embodiment includes: a header flow path that extends in a first direction; and a plurality of branching flow paths that are connected to the header flow path and extend in a second direction intersecting with the first direction. A first angle formed by the header flow path with respect to a virtual connection plane between the header flow path and the plurality of branching flow paths is less than a second angle formed by the branching flow paths with respect to the connection plane.

Abstract: An object of the present invention is to provide a versatile optical fiber lateral output device that can deal with various types of optical fiber core wires. An optical fiber input-output device according to the present invention includes: a first jig 11 including a recess portion 22 and an optical input-output means 51; a second jig 12 including a projection portion 23 and a guide groove 24; and a pressing unit 14 configured to apply a pressing force in a direction in which the recess portion 22 of the first jig 11 and the projection portion 23 of the second jig 12 approach each other so as to bend an optical fiber core wire 100. Letting R1 be a curvature radius of the recess portion 22 of the first jig 11, ?1 be a central angle of the recess portion 22, R2 be a curvature radius of the projection portion 23 of the second jig 12, and ?2 be a central angle of the projection portion 23, R2?R1 and ?2??1 are satisfied.

Abstract: An object of the present invention is to provide a monitoring device and an optical fiber identification method capable of efficiently identifying an optical fiber at a construction site. The monitoring device 71 includes a light receiver 74 that receives an optical signal SL leaked from an optical fiber, a counter 75 that counts the number of unique numbers indicating transmission sources included in the optical signal SL, and a display unit 76 that displays the number of unique numbers. The monitoring device 71 further includes a control unit 77 that causes the display unit 76 to display that a portion where the optical signal SL has leaked is between the 8-branch splitter 51 and the OLT 11 when the number of unique numbers is two or more, and that causes the display unit 76 to display that it is unknown whether a portion where the optical signal SL has leaked is between the 8-branch splitter 51 and the OLT 11 or between the 8-branch splitter 51 and the ONU 21 when the number of unique numbers is one.

Abstract: An object is to provide a highly versatile local-light detection apparatus for an optical fiber capable of supporting various types of coated optical fibers.

Abstract: A solution including an organic solvent (S), and an antioxidant (A), in which an antioxidant (A) includes a tocopherol compound (A1).

Abstract: The present disclosure is to provide a branch ratio measuring device, a branch ratio measuring method, and an optical multiplexer/demultiplexer circuit manufacturing method that do not require any optical sources for measurement. A branch ratio measuring device according to the present disclosure includes: an optical waveguide that has a cladding polished to the core or to the vicinity of the core; a first optical intensity measurement unit that is connected to one end of the core of the optical waveguide, and measures an optical intensity; and a second optical intensity measurement unit that is connected to the other end of the core of the optical waveguide, and measures an optical intensity.

Abstract: An object of the present disclosure is to provide an optical coupling device capable of controlling a coupling rate of optical coupling between two coupling optical fibers. An optical coupling device of the present disclosure includes two coupling optical fibers each including a core and a clad and, between the two coupling optical fibers, a thickness variable member having a thickness between the two coupling optical fibers that varies by irradiation with light.

Abstract: An object of the present disclosure is to enable an optical signal propagating through a core of an optical fiber to enter and exit without bending the optical fiber. The optical fiber of the present disclosure includes: a core; a cladding layer having a refractive index lower than a refractive index of the core; and a coating layer that coats an outer periphery of the cladding layer, in which the cladding layer includes: a first cladding portion of which main component is the same as that of the core; and a second cladding portion of which main component is different from the main component of the first cladding portion, and is softer than the first cladding portion, and an interface between the first cladding portion and the second cladding portion is in contact with the core.

Abstract: An object of the present disclosure is to provide an optical coupling device capable of controlling a coupling index of optical coupling between two optical fibers for coupling. An optical coupling device of the present disclosure includes two optical fibers for coupling having a core and a clad, and a refractive index variable member to change the refractive index by irradiation with light between the two optical fibers for coupling.

Abstract: A manufacturing method of an optical splitter of the present disclosure includes: performing first processing that involves mounting a coated optical fiber on a jig configured to store the coated optical fiber, and polishing the coated optical fiber together with the jig until reaching a vicinity of a core of the coated optical fiber or the core of the coated optical fiber; performing second processing that involves applying a refractive index matching material having a refractive index lower than a refractive index of the core of the coated optical fiber onto a polished face of the coated optical fiber on the jig polished in the first processing or onto a polished face of an optical waveguide circuit having been polished in advance until reaching a vicinity of a core or reaching the core, and then bonding the polished faces to each other; and performing third processing that involves positionally aligning the polished faces bonded with each other in the second processing to move the jig or the optical wavegu

Abstract: An object of the present invention is to provide an optical network system with high electric power efficiency, an operation method thereof, and an optical line terminal device capable of realizing the same. An optical network system (301) according to the present invention is a bus wiring type optical network system and includes an optical line terminal device (11a) which transmits optical signals (Ls), an optical multiplexer/demultiplexer circuit (12) which inputs some of the optical signals (Ls) to an optical bus core wire (50), and a photoelectric conversion unit (13) which converts the other of the optical signals (Ls) into electric power. The optical network system (301) can effectively utilize the electric power by reusing the electric power wasted in a port (Tf) of an optical fiber coupler.

Abstract: There are provided an optical fiber display system and an optical fiber changeover method each enabling an efficient optical fiber changeover work. The optical fiber display system according to the present invention includes a plurality of core wire identification terminals 101.

Abstract: An object of the present invention is to provide a terminal determination device and a terminal determination method, which enable identification of a reflection signal from a terminal portion of an optical fiber to be measured even in a case where a reflection signal caused by multiple reflection appears in an OTDR waveform in a mode in which an OTDR and the optical fiber to be measured are connected at a bent portion. The reflection signal caused by multiple reflection inevitably propagates through a distance equal to a distance between true reflection points more than the other reflection point, because of multiple reflection. Therefore, a distance between the reflection signal and another reflection signal is inevitably coincident with a distance between the other reflection signals.