The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 22, 2019
Filed:
Feb. 18, 2016
Sumitomo Electric Industries, Ltd., Osaka-shi, JP;
Takafumi Ohtsuka, Yokohama-shi, JP;
Sumitomo Electric Industries, Ltd., Osaka-shi, JP;
Abstract
The optical fiber sensor system includes a light source unit including a light source and a polarization controller, a modulation unit having an optical path and a coil and configured to modulate light passing though the optical path according to stress applied to the coil, an optical coupler configured to branch the measured light into clockwise light and counterclockwise light, and output interference light, a polarization separator configured to separate the interference light into a first component and a second component having polarization states orthogonal to each other, and a detection unit having a first light detector and configured to detect stress by converting the first component into a first electrical signal. The polarization controller controls a polarization state of light output from the light source so that the first electrical signal is proportional to the stress.