Abstract: An iron-based sintered body includes a metal matrix and complex oxide particles contained in the metal matrix. When a main viewing field having an area of 176 ?m×226 ?m is taken on a cross section of the iron-based sintered body and divided into a 5×5 array of 25 viewing fields each having an area of 35.2 ?m×45.2 ?m, the complex oxide particles have an average equivalent circle diameter of from 0.3 ?m to 2.5 ?m inclusive, and a value obtained by dividing the total area of the 25 viewing fields by the total number of complex oxide particles present in the 25 viewing fields is from 10 ?m2/particle to 1,000 ?m2/particle inclusive. The number of viewing fields in which no complex oxide particle is present is 4 or less out of the 25 viewing fields.

Abstract: The present embodiment relates to a method of directly measuring a leakage loss from a peripheral core in a MCF with a coating to the coating. In the measurement method, in a high refractive-index state in which the coating is present on an outer periphery of a common cladding, first transmission power of measurement light, which propagates through the peripheral core of the MCF, is measured. On the other hand, in a low refractive-index state in which a low-refractive-index layer with a lower refractive index than the common cladding is provided on the outer periphery of the common cladding, second transmission power of the measurement light, which propagates through the peripheral core of the MCF, is measured. The leakage loss LL from the peripheral core to the coating is calculated as a difference between the first transmission power and the second transmission power.

Abstract: The present embodiment relates to an MCF having a low transmission loss and having a structure for reducing a transmission loss and effectively suppressing an inter-core XT. The uncoupled MCF includes alkali metal having a predetermined concentration in which each of a plurality of cores contributes to reduction in the transmission loss, and a core pitch is set so that a sum h_total of power coupling coefficients of a specific core and the remaining all cores of the plurality of cores is 2.3×10?4/km or less.

Abstract: Light output from a light source is distributed to intensity modulators that are associated with different spatial modes and that have different modulation conditions. An operation for receiving modulated light from each of the intensity modulators is performed for SDM fibers of different lengths while the light source is in operation, and pieces of optical power information are determined for respective spatial modes to be measured, from difference information regarding the lengths and the received optical powers.

Abstract: A signal processing device (100) includes a prediction circuit (20) configured to generate Vb_T2 corresponding to an output signal to be obtained at T2 after T1, in accordance with Va_T1 obtained at the time T1, in a transition response period before Tr or Td elapses, where Tr denotes a time period during which an output signal Va(T) of a sensor (80) changes from a converged value Vc1 corresponding to a parameter P1 representing a certain property of an object to be measured to a converged value Vc2 corresponding to P2, and Td denotes a time period during which Va(T) changes from Vc2 to Vc1. The prediction circuit generates the predicted value so that TrE<Tr, TdE<Td, |1?Td/Tr|>|1?TdE/TrE| are satisfied, where TrE denotes a time period during which the predicted value becomes a value corresponding to Vc2, and TdE denotes a time period during which the predicted value becomes a value corresponding to Vc1.

Abstract: An MCF of the present embodiment has eight or more cores. A diameter of a common cladding is not more than 126 ?m. Optical characteristics of each core are as follows: a TL at a predetermined wavelength of 1310 nm is not more than 0.4 dB/km; an MFD at the predetermined wavelength is from 8.0 ?m to 10.1 ?m; a BL in a BR of not less than 5 mm or in the BR of not less than 3 mm and, less than 5 mm is not more than 0.25 dB/turn at the predetermined wavelength; ?0 is from 1300 nm to 1324 nm; ?cc is not more than 1260 nm; an XT or XTs at the predetermined wavelength is not more than 0.001/km.

Abstract: An MCF of the present embodiment has eight or more cores. A diameter of a common cladding is not more than 126 ?m. Optical characteristics of each core are as follows: a TL at a predetermined wavelength of 1310 nm is not more than 0.4 dB/km; an MFD at the predetermined wavelength is from 8.0 ?m to 10.1 ?m; a BL in a BR of not less than 5 mm or in the BR of not less than 3 mm and, less than 5 mm is not more than 0.25 dB/turn at the predetermined wavelength; ?0 is from 1300 nm to 1324 nm; ?cc is not more than 1260 nm; an XT or XTs at the predetermined wavelength is not more than 0.001/km.

Abstract: An image processing method by an image processing apparatus, including: acquiring a first image which is a first area of a subject displayed with first resolving power; acquiring a second image which is a second area smaller than the first area of the subject, displayed with second resolving power higher than the first resolving power; and generating a third image by compositing the first image and the second image with the first resolving power and the second resolving power remaining.

Abstract: Light output from a light source is distributed to intensity modulators that are associated with different spatial modes and that have different modulation conditions. An operation for receiving modulated light from each of the intensity modulators is performed for SDM fibers of different lengths while the light source is in operation, and pieces of optical power information are determined for respective spatial modes to be measured, from difference information regarding the lengths and the received optical powers.

Abstract: The present embodiment relates to a CMCF including a structure to achieve more efficient reduction in transmission loss by suppressing decrease in concentration of alkali metal due to diffusion of alkali metal. In the CMCF including a plurality of cores, a power coupling coefficient h between adjacent cores is set to 1×10?3/m or more, to maintain an optical coupling state between the adjacent cores. In addition, alkali metal contributing to reduction in transmission loss is added to each of the cores such that a stress maximum value ?_max between adjacent cores has a negative value.

Abstract: An embodiment relates to a method for manufacturing an optical module having an MCF and two connection components, and enables rotational alignment of the MCF to be implemented with high accuracy even in short-haul optical wiring. The MCF is arranged in a region between the two connection components while an end thereof projects from one connection component. As this arrangement state is maintained, array positions of cores in the projecting end are observed from a side face and the MCF is rotationally aligned by a rotation grasp jig grasping the projecting end to adjust the array positions of the cores, based on the observation result.

Abstract: An MCF of the present embodiment has eight or more cores. A diameter of a common cladding is not more than 126 ?m. Optical characteristics of each core are as follows: a TL at a predetermined wavelength of 1310 nm is not more than 0.4 dB/km; an MFD at the predetermined wavelength is from 8.0 ?m to 10.1 ?m; a BL in a BR of not less than 5 mm or in the BR of not less than 3 mm and, less than 5 mm is not more than 0.25 dB/turn at the predetermined wavelength; ?0 is from 1300 nm to 1324 nm; ?cc is not more than 1260 nm; an XT or XTs at the predetermined wavelength is not more than 0.001/km.

Abstract: An embodiment of the invention relates to a bent optical fiber manufacturing method for manufacturing a bent optical fiber in which a bent region with a desired radius of curvature is formed, while maintaining an optical transmission loss within a permissible range. The method has a pre-step of preparing an optical fiber comprised of silica-based glass, a bend portion forming step of forming a bend portion in a partial region of the optical fiber, and a laser light irradiating step of irradiating the thus-formed bend portion with laser light.

Abstract: The present embodiment relates to an MCF in which the strength of mode coupling or power coupling between adjacent cores included in one coupled-core group is set to an appropriate level to reduce a DGD. The MCF includes at least one coupled-core group. A core interval A between adjacent cores included in the coupled-core group is set such that a mode coupling coefficient between the adjacent cores at a wavelength of 1550 nm satisfies 2.6×100 [m?1] to 1.6×102 [m?1] or a power coupling coefficient between the adjacent cores at the wavelength of 1550 nm satisfies 1.3×10?3 [m?1] to 8.1×100 [m?1].

Abstract: A wound battery includes an electrode assembly in which a first electrode and a second electrode are wound together via a separator, the electrode assembly being accommodated in a battery case including a bottomed tube-shaped metallic can. The first electrode has a first uncoated region defined by an exposed portion of a first current collector sheet at an end of the first current collector sheet in the axial direction of winding. The first electrode includes a first current collector lead connected to the first uncoated region. The first uncoated region is disposed on the same side as the open end of the metallic can. The second electrode includes a second current collector lead connected thereto. The first and the second current collector leads extend toward the open end of the metallic can. At least a portion of the first uncoated region is covered with an insulating layer, and the insulating layer extends beyond an end face of the first uncoated region.

Abstract: The present invention relates to a multi-core optical fiber that can realize suppression of crosstalk on an easy and inexpensive basis. The multi-core optical fiber is provided with a plurality of core portions extending along a central axis of the fiber, a common cladding portion integrally holding the core portions inside, a coating layer surrounding the common cladding portion, and a bend applying portion. The bend applying portion, as an example, is provided on a partial region of an outer periphery of the coating layer and applies bending stress to a glass region.

Abstract: The present embodiment relates to a multi-core optical fiber and others having an excellent transmission capacity per unit cross-sectional area and spectral efficiency and being easy to manufacture. The multi-core optical fiber has a plurality of cores, a cladding, and a coating and has an appropriately-set neighboring core pitch, cable cutoff wavelength, confinement index of light into each core, cladding outer diameter, and neighboring intercore power coupling coefficient, and a relationship among a minimum of Formula ?/(rclad?OCTmin), a maximum of the Formula, and a core count is present under a predetermined relationship.

Abstract: There is provided a communication apparatus including an antenna unit configured to transmit or receive a wireless signal, and a wireless processing unit configured to process the wireless signal transmitted or received via the antenna unit. The antenna unit is configured or arranged to maintain a satisfactory communication characteristic regardless of arrangement and a direction with respect to an antenna of a communication partner apparatus that transmits or receives a wireless signal of high directivity.

Abstract: In an optical waveguide having plural cores including a pair of adjacent cores with an identical core structure, a minimum value D of center-center distance between the adjacent cores is 15 ?m to 60 ?m, each of the plural cores has a bent portion fixed in a radius of curvature Rb of not more than 7 mm, a bend supplementary angle of the bent portion is 58° to 90°, a height of the optical waveguide is defined as a height of not more than 10 mm, and a crosstalk of the adjacent cores is not more than 0.01.

Abstract: An imaging device, comprising an interchangeable lens having a photographing optical system whose focal length can be varied, comprises a zoom position detection section for detecting a zoom position in accordance with focal length of the imaging optical system, and a lens control section for controlling movement of a focus lens contained in the imaging optical system, wherein the lens control section corrects position that the focus lens is moved to in accordance with the zoom position before movement of the focus lens and zoom position during movement of the focus lens.