Kyocera Corporation

Shougo Matsunaga

Hiroshi Matsumoto

Yoshiaki Itakura

Yushi Nagasaka

Keisuke Toda

An optical waveguide package includes a substrate including a first surface, a cladding layer on the first surface and including a facing surface facing the first surface and an opposite surface opposite to the facing surface including a recess, multiple element mount portions in the recess, and a core in the cladding layer. The core includes multiple light incident portions each including an incident end face located at an inner side surface of the recess, a merging portion in which the multiple light incident portions merge, and a light emission portion located downstream from the merging portion and including an emission end face located at an outer side surface of the cladding layer. The first surface includes an exposed portion at least lateral to the merging portion in a plan view.

Optical waveguide package and light source module

A light-emitting device includes an optical waveguide package, a light-emitting element in an element mount, and a lid covering the element mount. The optical waveguide package includes a substrate including a first surface, a cladding on the first surface and including a second surface facing the first surface, a third surface opposite to the second surface, and the element mount with an opening in the third surface, and a core in the cladding. The cladding includes a first portion having the core inside, and a second portion facing the first portion across the element mount. The first portion includes a plurality of first protrusions in an area of the third surface corresponding to the first portion. The second portion includes a plurality of second protrusions in an area of the third surface corresponding to the second portion.

Optical waveguide package and light-emitting device

A flow rate-velocity sensor device includes a package including a light receiver and a light emitter, a transparent substrate including a light shield, and a flow rate-velocity calculator. The flow rate-velocity calculator includes a receiver, a correction unit, an arithmetic unit, and a transmitter. The receiver receives data on a first power spectrum. The correction unit corrects the data received by the receiver to calculate a second power spectrum. The arithmetic unit calculates at least one of a flow rate or a flow velocity from the second power spectrum calculated by the correction unit. The transmitter transmits, to an external unit, at least one of the flow rate or the flow velocity calculated by the arithmetic unit.

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Kirishima, Japan

Shougo Matsunaga