Title:
光学式濃度測定装置および光導波路
Document Type and Number:
Japanese Patent JP7362497
Kind Code:
B2
Abstract:
To provide an optical concentration measurement device and an optical waveguide which can connect a light emitting element and an optical waveguide to each other with a high efficiency.SOLUTION: The optical concentration measurement device for measuring the concentration of a measurement target gas or a measurement target liquid comprises: a light source which can enter light into a core layer; a detector which can receive light which has propagated in the core layer; and an optical waveguide. The optical waveguide includes: a substrate; and a core layer having a light propagation unit with a propagation path in which light can propagate in the direction of extension of the path and having a first diffraction grating unit for receiving light from the light source and deriving the light to the light propagation unit. The first diffraction grating unit is arranged near a light emission surface of the light source to face the light emission surface, and has a plurality of first diffraction gratings. At least two of the plurality of first diffraction gratings receive light emitted from the same light emission surface of the light source.SELECTED DRAWING: Figure 2
Inventors:
Toshiro Sakamoto
Takaaki Furuya
Takaaki Furuya
Application Number:
JP2020011747A
Publication Date:
October 17, 2023
Filing Date:
January 28, 2020
Export Citation:
Assignee:
Asahi Kasei Electronics Corporation
International Classes:
G01N21/552; G02B6/124
Domestic Patent References:
| JP2018165714A |
Foreign References:
| US20150309261 | ||||
| WO2015111458A1 | ||||
| US20030235370 | ||||
| WO2015187014A1 | ||||
| US20150131942 |
Other References:
Yunhong DING et al.,On-chip grating coupler array on the SOI platform for fan-in/fan-out of MCFs with low insertion loss and crosstalk,Optics Express,2015年02月09日,Vol. 23,No. 3,PP.3292-3298
Attorney, Agent or Firm:
Kenji Sugimura
Koichiro Kami
Toshiki Suzuki
Koichiro Kami
Toshiki Suzuki