Fujikura Limited

Tomoharu Sagawa

Shoichiro Matsuo

Kuniharu Himeno

Shoji Tanigawa

Koichi Harada

Atsushi Kume

Masataka Ikeda

A mounting board of the invention includes: an insulative base; a plurality of first conductive elements provided on the insulative base and having lands; a plurality of second conductive elements disposed on the lands; a plurality of solder pieces each disposed on each of the second conductive elements; and an electronic component which includes electrode sections each contacting each of the solder pieces, wherein the first conductive elements are made from a first element that contains at least silver; the second conductive elements are made from a second element that contains at least copper; and the solder pieces are made from a third element that contains at least tin.

Mounting board and method of producing the same

A method of measuring polarization mode dispersion of an optical fiber includes inputting linearly polarized pulse light into an optical fiber, separating the input linearly polarized light from backscattered light from the optical fiber, detecting a light intensity of the backscattered light as time series data since the generation of the pulse light, calculating a fluctuation of the detected light intensity in the time series data, and evaluating polarization mode dispersion in the optical fiber, based on the calculated fluctuation value.

Optical fiber polarization mode dispersion measurement method and measurement device

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Sakura, Japan

Tomoharu Sagawa